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Urban Water Management Plan (2025)
Otay Water District 2025 Urban Water Management Plan May 2026 Otay Water District 2554 Sweetwater Springs Boulevard Spring Valley, CA 91978 www.otaywater.gov 2025 Urban Water Management Plan Prepared by: Otay Water District 2554 Sweetwater Springs Boulevard Spring Valley, CA 91978 www.otaywater.gov With assistance from: Woodard & Curran 9665 Chesapeake Drive, Suite 320 San Diego, CA 92123 June 2026 Table of Contents i TABLE OF CONTENTS SECTION PAGE NO. 1. INTRODUCTION AND LAY DESCRIPTION ...................................................................................... 1-1 1.1 California Urban Water Management Planning Act .......................................................................... 1-1 1.2 Relation to Other Planning Efforts ........................................................................................................... 1-1 1.2.1 Senate Bills 610 and 221 .................................................................................................................. 1-1 1.2.2 Senate Bill 606 and Assembly Bill 1668 ..................................................................................... 1-1 1.3 Plan Structure ................................................................................................................................................... 1-2 1.4 2025 UWMP Summary and Lay Description ........................................................................................ 1-3 1.4.1 Water Use Management .................................................................................................................. 1-3 1.4.2 Water Supply Reliability and Drought Planning ..................................................................... 1-4 2. PLAN PREPARATION ........................................................................................................................ 2-1 2.1 Basis and Approach for Preparing the UWMP .................................................................................... 2-1 2.2 Level of Planning and Compliance ........................................................................................................... 2-1 2.3 Agency Coordination and Outreach ........................................................................................................ 2-3 3. SERVICE AREA DESCRIPTION ........................................................................................................... 3-1 3.1 Service Area Description .............................................................................................................................. 3-1 3.2 Service Area Population and Demographics ........................................................................................ 3-3 3.3 Land Use within the Service Area ............................................................................................................. 3-3 3.4 Service Area Climate ...................................................................................................................................... 3-5 3.5 Climate Change Impacts .............................................................................................................................. 3-7 4. WATER USE CHARACTERIZATION .................................................................................................. 4-1 4.1 Existing Water Use by Customer Class ................................................................................................... 4-1 4.2 Past Water Use ................................................................................................................................................. 4-2 4.3 Projected Water Use ...................................................................................................................................... 4-4 4.3.1 Recycled Water Demand ................................................................................................................. 4-7 4.3.2 Near-Term Annexations ................................................................................................................... 4-7 4.3.3 Regional Coordination on Projected Water Use .................................................................... 4-9 4.3.4 Climate Change Effects on Water Use ..................................................................................... 4-10 4.3.5 Future Conservation Savings ....................................................................................................... 4-11 4.3.6 Water Use for Lower Income Households ............................................................................. 4-11 4.4 Distribution System Water Losses ......................................................................................................... 4-13 4.5 Progress Toward Meeting the Water Loss Performance Standards ........................................ 4-13 5. SB X7-7 TARGETS, AND REPORTING .............................................................................................. 5-1 6. NORMAL YEAR WATER SUPPLY CHARACTERIZATION ................................................................ 6-1 6.1 Water Resources .............................................................................................................................................. 6-1 6.1.1 Purchased or Imported Water ....................................................................................................... 6-1 6.1.1.1 San Diego County Water Authority (Water Authority)......................................... 6-1 6.1.1.2 City of San Diego ................................................................................................................ 6-2 Table of Contents ii 6.1.2 Groundwater ......................................................................................................................................... 6-2 6.1.3 Wastewater and Recycled Water .................................................................................................. 6-2 6.1.3.1 Recycled Water Coordination ........................................................................................ 6-3 6.1.3.2 Wastewater Collection, Treatment, and Disposal ................................................... 6-3 6.1.3.3 Recycled Water System Description ............................................................................ 6-6 6.1.3.4 Recycled Water Beneficial Uses ..................................................................................... 6-6 6.1.3.5 Actions to Encourage and Optimize Future Recycled Water Use .................... 6-8 6.1.4 Future Water Projects ....................................................................................................................... 6-9 6.1.4.1 Rosarito Desalination Plant ............................................................................................. 6-9 6.1.4.2 Groundwater Supply Development .......................................................................... 6-10 6.1.4.3 North District Recycled Water Concept Project ................................................... 6-11 6.2 Summary of Existing and Planned Sources of Water .................................................................... 6-11 6.3 Climate Change Impacts to Supply ....................................................................................................... 6-14 6.4 Energy Use ...................................................................................................................................................... 6-14 7. WATER SERVICE RELIABILITY AND DROUGHT RISK ASSESSMENT ............................................ 7-1 7.1 Reliability of Supply ........................................................................................................................................ 7-1 7.2 Projected Normal Water Year Assessment ........................................................................................... 7-3 7.3 Projected Single Dry Year Assessment ................................................................................................... 7-3 7.4 Projected Multiple Dry Year Supply and Demand Comparison ................................................... 7-4 7.5 Drought Risk Assessment ............................................................................................................................ 7-5 8. WATER SHORTAGE CONTINGENCY PLAN ..................................................................................... 8-1 8.1 Purpose of the WSCP .................................................................................................................................... 8-1 8.2 Annual Water Supply and Demand Assessment Procedures ........................................................ 8-1 8.3 Water Shortage Stages and Shortage Response Actions ............................................................... 8-1 8.4 Water Shortage Response Actions ........................................................................................................... 8-1 9. DEMAND MANAGEMENT MEASURES ............................................................................................ 9-1 9.1 Participation in Regional Partnership Water Conservation Programs ....................................... 9-1 9.2 District-Developed Water Conservation and Water Efficiency Programs ................................ 9-2 9.2.1 Water Waste Prevention Ordinance ............................................................................................ 9-2 9.2.2 Metering ................................................................................................................................................. 9-3 9.2.3 Tiered Pricing ........................................................................................................................................ 9-4 9.2.4 Supervisory Control and Data Acquisition ................................................................................ 9-4 9.2.5 Water Loss Reductions ..................................................................................................................... 9-4 9.2.6 Public Education & Outreach ......................................................................................................... 9-4 9.2.7 Water Conservation Staffing .......................................................................................................... 9-5 10. PLAN ADOPTION, SUBMITTAL, AND IMPLEMENTATION ......................................................... 10-1 10.1 Notice of Public Hearing ........................................................................................................................... 10-1 10.2 Plan Submittal ............................................................................................................................................... 10-1 11. REFERENCES ..................................................................................................................................... 11-1 Table of Contents iii APPENDICES APPENDIX A: CALIFORNIA WATER CODE - URBAN WATER MANAGEMENT PLANNING TEXT APPENDIX B: ADOPTION RESOLUTION AND NOTIFICATION DOCUMENTATION APPENDIX C: DWR 2025 UWMP CHECKLIST APPENDIX D: AWWA WATER LOSS WORKSHEETS APPENDIX E: AGREEMENTS FOR WATER APPENDIX F: WATER AUTHORITY SUPPLY RELIABILITY ANALYSIS APPENDIX G: OTAY WATER DISTRICT WATER SHORTAGE CONTINGENCY PLAN APPENDIX H: DISTRICT CODE OF ORDINANCES APPENDIX I: QUANTIFYING REGIONAL SELF-RELIANCE AND REDUCED RELIANCE ON THE DELTA WATERSHED APPENDIX J: DWR 2025 UWMP STANDARDIZED TABLES TABLES Table 2-1: Public Water System Table 2-2: Plan Identification Table 2-3: Supplier Identification Table 2-4: Water Supplier Information Exhange Table 3-1: Population – Current and Projected Table 3-2: Climate Data Table 4-1: Demands for Potable and Non-Potable Water – Actual Table 4-2: Historical Potable Water Demands Table 4-3: Historical Non-Potable Water Demands Table 4-4: Projected Demands for Potable Water – North District Service Area Table 4-5: Projected Demands for Potable Water – Central System of South District Service Area Table 4-6: Projected Demands for Potable Water – Otay Mesa System of South District Service Area Table 4-7: Projected Total Uses of Potable and Non-Potable Water (2030 – 2050) (AFY) Table 4-8: Inclusion in Water Use Projections Table 4-9: Water Loss Audit Reporting Table 4-10: Progress Toward 2028 Water Loss Standard Table 5-1: SB X7-7 2020 Target Progress Table 6-1: Groundwater Volume Pumped Table 6-2: Wastewater Collected Within Service Area in 2025 Table 6-3: Wastewater Treatment and Discharge within Service Area in 2025 Table 6-4: Golf Course Irrigation with Recycled Water (AFY) (Fiscal Years 2020-2025) Table 6-5: Current and Projected Recycled Water Direct Beneficial Uses within Service Area 2025-2050 Table 6-6: Recycled Water Use Projection Compared to 2025 Actual Table 6-7: Methods to Encourage Future Recycled Water Use Table 6-8: Water Supplies - 2025 Actual Table of Contents iv Table 6-9: Water Supplies - Projected Table 7-1: Basis of Water Year Data (Water Service Reliability Assessment) Table 7-2: Normal Year Supply and Demand Comparison Table 7-3: Single Dry Year Supply and Demand Comparison Table 7-4: Multiple Dry Years Supply and Demand Comparison Table 7-5: Five-Year Drought Risk Assessment Tables to Address Table 10-1: Notification to Cities and Counties FIGURES Figure 3-1: Otay Water District Service Area Figure 3-2: Otay Water District Land Use Forecast, SANDAG Figure 3-3: Temperature, Precipiation, and Evapotranspiration Distribution Figure 4-1: Service Area Population and Potable Water Use by Type (2010-2025) Figure 4-2: Low-Income And Disadvantaged Communities Identified by DWR Acronyms and Abbreviations Act California Urban Water Management Planning Act AF Acre-feet AFY Acre feet per year AWWA American Water Works Association CEQA California Environmental Quality Act CIMIS California Irrigation Management Information System CW3E Center for Western Weather and Water Extremes DAC Disadvantaged Community DRA Drought Risk Assessment DWR California Department of Water Resources District Otay Water District DMM Demand Management Measures DRA Drought risk assessment ETo Evapotranspiration FY Fiscal Year GPCD Gallons per capita per day GPSCD Gallons per service connection per day GDP General Development Plan Helix WD Helix Water District IID Imperial Irrigation District LAFCO Local Agency Formation Commission LOPS Lower Otay Pump Station MHI Median Household Income mgd Million gallons per day Metropolitan Metropolitan Water District of Southern California MWWD Metropolitan Wastewater Department Table of Contents v MGRA Master Geographic Reference Area MSCP Multiple Species Conservation Program NEPA National Environmental Policy Act Pipeline No. 4 Pipeline Number 4 RHNA Regional Housing Needs Assessment RWCWRF Ralph W. Chapman Water Recycling Facility SANDAG San Diego Association of Governments Second Aqueduct Second San Diego Aqueduct SB Senate Bill SBWRP South Bay Water Reclamation Plant SVSD Spring Valley Sanitation District SWRCB State Water Resources Control Board TLOPS Temporary Lower Otay Pump Station UWMP Urban Water Management Plan WAG Water Affiliates Group WWTP Wastewater Treatment Plant Water Authority San Diego County Water Authority Water Code California Water Code WRCC Western Regional Climate Center WSCP Water Shortage Contingency Plan WSRA Water service reliability assessment WTP Water Treatment Plant WUCA Water Utility Climate Alliance Otay Water District 2025 Urban Water Management Plan June 2026 Chapter 1: Introduction and Overview 1-1 1. INTRODUCTION AND LAY DESCRIPTION Since 1984, California’s Urban Water Management Planning Act (Act) has required each urban water supplier in the state to prepare an urban water management plan (UWMP). A UWMP is a supply reliability plan that provides an understanding of past, current, and future water conditions and management. The UWMP requirement applies to each urban water supplier that provides water for municipal purposes either directly or indirectly to more than 3,000 customers or supplies more than 3,000 acre-feet (AF) of water annually. These agencies must update their UWMP at least once every five years on or before July 1, in years ending in six and one. Sections 10610 through 10656 and Section 10608 of the California Water Code (Water Code) detail the information that must be included in these plans. In accordance with the Act, the Otay Water District (District) is required to update and adopt its plan for submittal to the California Department of Water Resources (DWR) by July 1, 2026. 1.1 California Urban Water Management Planning Act Since the preparation of the District‘s 2020 UWMP, there have been minor changes to the Water Code and UWMP Guidelines. The changes relevant to the District include the following. • Water Loss Standard Reporting. There has been no change to the Water Code regarding water loss standard reporting since the 2020 UWMP. However, the existing Water Code requires suppliers to demonstrate compliance with the 2028 Water Loss Standard. The Water Loss Standards were not available when the 2020 UWMP was submitted, but are available now and, therefore, are reported in this UWMP update. • Lower Income Housing. While projections for lower-income housing were required in 2020 UWMPs, additional guidance has been provided for optional reporting of the method used to project water use for lower-income housing. The optional guidance incorporated Regional Housing Needs Assessment (RHNA) into projected land uses and water demands. 1.2 Relation to Other Planning Efforts 1.2.1 Senate Bills 610 and 221 Senate Bills (SB) 610 and 221 are the common names for Water Code Sections 10910 through 10914 and Government Code Sections 65867.5, 66455.3, and 66473.7. These bills amended state law to improve the link between water supply planning and land use decisions made by cities and counties. SB 610 requires that the water purveyor of the public water system prepare a water supply assessment to be included in the environmental documentation of certain large, proposed projects. SB 221 requires a written verification from the water purveyor that sufficient water supplies are available for certain large residential subdivisions prior to approval of a tentative map. The District’s UWMP provides information that will be used in future assessments and verifications prepared to meet the requirements of these bills. 1.2.2 Senate Bill 606 and Assembly Bill 1668 New water conservation legislation was signed into law in 2018. This legislation included SB 606 and Assembly Bill 1668 which created a framework that directed DWR and the State Water Resources Control Board (SWRCB) to develop and adopt long term water efficiency targets that water suppliers need to meet by 2027, with targets decreasing over time until 2040. Each retail water supplier in the state has an urban Otay Water District 2025 Urban Water Management Plan June 2026 Chapter 1: Introduction and Overview 1-2 water-use objective based on efficiency standards for indoor residential water use, landscape irrigation and water loss. The District’s UWMP incorporates assumptions about compliance with the long-term urban water use objectives into the overall demand forecast; however, there are no requirements in the Water Code or UWMP Guidelines that water suppliers report on their urban water use objectives in their UWMPs. 1.3 Plan Structure This UWMP is organized according to the DWR recommended structure for preparing the 2025 UWMP. • Chapter 1 – UWMP Introduction. This chapter provides a discussion on fundamentals of the UWMP and provides the required lay description of how much water the District has on a reliable basis, how much it needs for the foreseeable future, challenges, and what the District’s strategy is for meeting its water needs. • Chapter 2 – Plan Preparation. This chapter provides information on the processes used for developing the UWMP, including efforts in coordination and outreach. • Chapter 3 – Service Area Description. This chapter describes the District’s system. This description includes a map of the service area, an explanation of the service area and climate, detail on the public water system, and an overview of the District’s organizational structure and history. • Chapter 4 – Normal Year Water Use Characterization. This chapter describes and quantifies the current and projected water uses within the District’s service area. • Chapter 5 – Conservation Compliance. This chapter reports on the District’s compliance with its SB X7-7 per-capita water conservation mandate, as calculated in its 2010 UWMP. • Chapter 6 – Normal-Year Water Supply Characterization. This chapter describes and quantifies the District’s current and projected potable and recycled water supplies. This chapter also provides a narrative description of each supply source and quantifies the supply availability for each supply source identified. • Chapter 7 – Water Service Reliability and Drought Risk Assessment. This chapter describes the District’s water service reliability through 2050. This description is provided for normal, single dry year, and five consecutive dry years. This chapter also includes the Drought Risk Assessment (DRA), which, as required by the Water Code, presets a reliability analysis over the next five years based on the driest five-year sequence, namely 2014-2018 when local water supply production was at its lowest. The water service reliability analysis differs from the DRA by allowing a different basis for characterizing the five consecutive dry years and by considering reliability in five-year increments through the UWMP planning horizon, 2050. • Chapter 8 – Water Shortage Contingency Plan. This chapter provides a structured plan for dealing with water shortages, incorporating prescriptive information and standardized action levels, along with implementation actions in the event of a catastrophic supply interruption. • Chapter 9 – Demand Management Measures. This chapter communicates the District’s efforts to promote conservation and to reduce demand on its water supply. Specifically, it includes a narrative describing efforts to implement several Demand Management Measures (DMMs). Otay Water District 2025 Urban Water Management Plan June 2026 Chapter 1: Introduction and Overview 1-3 • Chapter 10 – Plan Adoption, Submittal, and Implementation. This chapter describes and documents the steps taken to make the 2025 UWMP publicly available, as well as the steps taken to adopt and submit the UWMP in accordance with the Water Code. This chapter also describes the District’s plan to implement the UWMP. • Appendices o Appendix A – California Water Code - Urban Water Management Planning Text o Appendix B – Adoption Resolution and Related Documentation, Notice of Plan Preparation o Appendix C – DWR 2025 UWMP Checklist o Appendix D – AWWA Water Loss Worksheet o Appendix E – City of San Diego Agreement for Otay WTP, City of San Diego Recycled Water Supply Agreement for South Bay Water Reclamation Plant (SBWRP) o Appendix F – Water Authority Supply Reliability Analysis o Appendix G – Otay Water District Water Shortage Contingency Plan o Appendix H – District Code of Ordinances Section 26 and 39 o Appendix I - Quantifying Regional Self-Reliance and Reduced Reliance on the Delta Watershed o Appendix J – DWR 2025 UWMP Standardized Tables 1.4 2025 UWMP Summary and Lay Description The District’s mission is to provide exceptional water and wastewater service to its customers, and to manage District resources in a transparent and fiscally responsible manner. The District’s 2025 UWMP is an important planning tool that the District will use to ensure that its customers have enough water to meet their needs. The UWMP provides information on the District’s current and expected future population within its service area and how the District will meet the water demands of that population with a reliable source of water, both in normal years and single and multiple dry years. The UWMP looks at existing and historical data to project water use in the future. Projecting future water use requires the consideration of factors that may affect that use including water conservation practices, climate change effects, and changes in housing densities (single-family to multi-family). 1.4.1 Water Use Management In fiscal year 2025 (the 12-month period ending in June 2025), total potable water use in the District’s service area was 30,000 acre-feet (AF) and total non-potable water use was 5,170 AF. By 2050, potable water use within the District is projected to reach 47,634 AF, representing a 59% increase from 2025 levels. Water use will steadily increase due to increases in population and development within the District’s service area and sphere of influence. Total annual water use in 2025 was less significant than was seen in the previous 20 years, which reached a peak of 41,909 AF in 2007. The decrease in potable water demand since its peak is Otay Water District 2025 Urban Water Management Plan June 2026 Chapter 1: Introduction and Overview 1-4 due to several factors including consumer price response to the retail cost of water and a growing water use efficiency ethic. The District promotes water-use efficiency programs that encourage continuing conservation efforts by District customers. In partnership with the San Diego County Water Authority (Water Authority), the City of Chula Vista, and residential and commercial developers, the District’s water-use efficiencies and conservation efforts are expected to grow and expand. 1.4.2 Water Supply Reliability and Drought Planning The District is committed to improving the reliability of its water supply by reducing reliance on water that is imported into the District’s service area. This is accomplished by developing strategies to achieve this goal. One strategy is the District’s commitment to continuing investigations of local groundwater, desalination opportunities, and regional recycled water projects that could further reduce the District’s reliance on imported water. In addition, the District is committed to continued delivery of recycled water where it can replace imported potable water. For many years, the District has worked to reduce its reliance on imported water, and more specifically, treated imported water. On August 3, 1994, the District’s Board of Directors established a goal of being able to meet 40% of annual demands from local water sources when water is unavailable from the Water Authority. The District and the Water Authority entered into an agreement in 2006 (Appendix E) to provide the District with treated water from the Helix Water District (Helix WD) in addition to the District’s normal treated water supply from the Water Authority. A similar arrangement made with the City of San Diego in 1999 (Appendix E) provides the District access to treated water from the City of San Diego’s Otay Water Treatment Plant (WTP). The District has also aggressively developed its recycled water distribution system and has entered into an agreement to purchase recycled water from the City of San Diego. Drought planning is important to ensure that the District’s customers have a reliable source of water, even in extended periods of drought. The UWMP Act requires that the supplier includes a drought risk assessment in the UWMP. Because the Water Authority is the sole provider of the District’s potable water supply, the drought risk assessment is dependent on the Water Authority’s assessment of its ability to provide water during an extended drought. The Water Authority is well positioned to meet multiple dry year demands as presented in its 2025 UWMP. The District’s drought risk assessment builds on the Water Authority’s data and shows that the District will have a reliable source of potable water for its customers in an extended five-year period of drought. Otay Water District 2025 Urban Water Management Plan June 2026 Chapter 2: Plan Preparation 2-1 2. PLAN PREPARATION This section provides the basis and approach that the District used to update its UWMP. It includes the data reporting period and units of measure used by the District to report water volumes. This section also includes the details of the coordination and outreach activities conducted by the District during the preparation of this UWMP. 2.1 Basis and Approach for Preparing the UWMP The District submitted its first UWMP in 2000 in compliance with the Act. The District submitted the most recent update to the UWMP in June 2021, according to State law (Water Code Section 10621(f)), which extended the submittal deadline to July 1, 2021. In accordance with the Water Code, urban water suppliers with 3,000 or more service connections or supplying 3,000 or more AF of water per year are required to prepare an UWMP every five years. As an urban water supplier, the District is required to update and submit its 2025 plan to DWR by July 1, 2026. The District served 53,476 municipal connections and supplied volume of 35,170 AF in 2025 (Table 2-1). The District relied upon DWR’s “Urban Water Management Plan Guidebook 2025” (Guidebook) to prepare this plan. Each urban water supplier is also required to report on meeting its SB X7-7 goals, which are discussed later in this report. SB X7-7, known as the Water Conservation Act of 2009, was passed in November 2009 with the goal of reducing California’s urban per capita water use by 20% by December 31, 2020 with an incremental goal of reducing per capita water use by 10% by December 31, 2015. This report includes projections of the District’s future demands and supplies, based on estimates of future growth in the District’s service area. It also discusses the steps the District has taken to promote water conservation and ensure water is being used wisely. The strategies outlined in this report are intended to allow the District to continue to provide a safe and reliable water supply for its customers. TABLE 2-1: PUBLIC WATER SYSTEM DWR Submittal Table 2-1 Retail: Public Water Systems Public Water System Number Public Water System Name Number of Municipal Connections 2025 Volume of Water Supplied 2025 (AF) CA 3710034 Otay Water District 53,476 35,170 Total 53,476 35,170 Notes: Volume of water supplied in 2025 includes potable use, losses, and recycled water use. Sources: District consumption data, AWWA Water Audit reports 2.2 Level of Planning and Compliance The District joined the Water Authority as a member agency in 1956. The Water Authority is responsible for the supply of imported water into the San Diego County through its membership in Metropolitan Water District of Southern California (Metropolitan). The District receives imported potable water from the Otay Water District 2025 Urban Water Management Plan June 2026 Chapter 2: Plan Preparation 2-2 aqueduct systems owned and operated by the Water Authority and Metropolitan. Together these agencies work to ensure a diverse and reliable supply for the San Diego region. Effective water planning for the Water Authority and its member agencies requires consistent projections of supply and demand. The Water Authority facilitated an Urban Water Management Plan Working Group made up of staff from the Water Authority and its member agencies. This group provided a forum for exchanging demand and supply information. The District participated in workshops and meetings with Water Authority staff, providing water supply and demand and recycled water information. The District’s potable demands are currently met with imported water provided through the Water Authority and Metropolitan (via the Water Authority). Much of the supply discussion in this report is based on the supply planning performed by these regional agencies. The District is engaged in regional water supply planning and coordinates with regional partners. However, this is an individual UWMP that reports on water demands and supplies in the District's service area (as noted in Table 2-2). The District maintains its records of water use on a fiscal year (FY) that runs from July 1 through June 30 (Table 2-3). For example, FY 2025 runs from July 1, 2024 through June 30, 2025. In this document, projections of water demand over the course of a year are reported on a fiscal year basis. For estimates that are based on an instantaneous value and not a year-long accumulation (for example, the service area population), values are assumed to be valid on January 1 of the corresponding year TABLE 2-2: PLAN IDENTIFICATION DWR Table 2-2: Plan Identification Select Only One Type of Plan Individual UWMP Water Supplier is also a member of a RUWMP Water Supplier is also a member of a Regional Alliance Regional Urban Water Management Plan (RUWMP) Otay Water District 2025 Urban Water Management Plan June 2026 Chapter 2: Plan Preparation 2-3 TABLE 2-3: SUPPLIER IDENTIFICATION DWR Table 2-3: Supplier Identification Type of Supplier Supplier is a wholesaler Supplier is a retailer Fiscal or Calendar Year UWMP Tables are in calendar years UWMP Tables are in fiscal years Month and date that the fiscal year begins (mm/dd) 07/01 Units of measure used in UWMP Acre feet 2.3 Agency Coordination and Outreach The District has coordinated the preparation of its plan with other appropriate agencies in the area, including its wholesaler, the Water Authority (Table 2-4). Because the District relies upon the water supply from the Water Authority, the District has worked with the Water Authority and shared information for water supply and demand projections. TABLE 2-4: WATER SUPPLIER INFORMATION EXHANGE DWR Table 2-4 Retail: Water Supplier Information Exchange The retail supplier has informed the following wholesale supplier(s) of projected water use in accordance with CWC 10631. Wholesale Water Supplier Name San Diego County Water Authority The District has coordinated the preparation of its plan with other appropriate agencies in the area, including other water suppliers that share a common source, water management agencies, and public agencies. In accordance with the Act, the District provided notice on March 20, 2026, to the Water Authority (its wholesale water supplier), the San Diego Association of Governments (SANDAG), the City of San Diego, City of Chula Vista, City of El Cajon, San Diego Local Agency Formation Commission (LAFCO) and the County of San Diego that it was reviewing and considering amendments or changes to the UWMP and that it would be holding a public hearing prior to the adoption of the UWMP. The District also provided a letter to Helix Water District, Padre Dam Municipal Water District, and Sweetwater Authority on May 1, 2026, clarifying the location of the WSCP and giving notice of when the draft UWMP and WSCP would be available for review. Copies of the notices are included in Appendix B. Otay Water District 2025 Urban Water Management Plan June 2026 Chapter 2: Plan Preparation 2-4 Prior to adoption, the District made its Draft 2025 UWMP available to a larger number of stakeholders, including the agencies above. Notices include instructions for downloading the Draft 2025 UWMP from the District’s website. The Draft 2025 UWMP was first presented at an Engineering, Operations, and Water Resources (EO&WR) Committee Meeting of the District’s Board of Directors. A Public Hearing regarding the 2025 UWMP was held on June 3, 2026. Notices of the Public Hearing were published in the San Diego Union-Tribune (May 20 and May 27, 2026), The Star News (May 15 and May 22, 2026), The East County Californian (May 15 and May 22, 2026), and The Alpine Sun (May 15 and May 22, 2026). A copy of the public notice is included in Appendix B. Otay Water District 2025 Urban Water Management Plan June 2026 Chapter 3: Service Area Description 3-1 3. SERVICE AREA DESCRIPTION This section of the report provides an overview of the District’s service area, service area climate, available demographic and population data, and land uses within the service area to provide a basis for estimating future water requirements. The District’s service area has experienced some growth in the past five years, and the service area population is expected to be approximately 300,000 people by 2050. The boundary of the area served by the District is expected to expand from the currently served customers to encompass the District’s Sphere of Influence as land use changes and growth occur. 3.1 Service Area Description The District is located in southern San Diego County and was created in 1956 by a small group of private citizens, ranchers and landowners who were concerned about the declining quality and quantity of water from their rural wells. The District joined the Water Authority as a member agency in the same year. The Water Authority is the agency responsible for the supply of imported water into San Diego County through its membership in Metropolitan. The District is a California special district authorized under the provisions of the Municipal Water District Law of 1911 and is revenue neutral (i.e., each end user pays their fair share of costs for capital improvements, water acquisition, and the operation and maintenance of facilities). The District’s elected Board of Directors sets the ordinances, policies, taxes, and rates for providing wastewater, potable water, and recycled water. The District operates approximately 750 miles of potable water distribution and transmission pipelines and over 90 miles of recycled water pipelines in its conveyance system. In addition, the District oversees the Ralph W. Chapman Water Recycling Facility (RWCWRF). The District’s water service area is generally located within the south, central portion of San Diego County and encompasses approximately 126 square miles. The topography of the service area is diverse, consisting of a variety of valleys, hills, mountains, mesas, lakes, and rivers. The service area includes both urban and rural development. The major transportation arteries serving the area include State Highway 94 in the north, State Route 125 in the central area, Interstate 805 in the southwest, and Interstate 905 to the south. State Route 11 is in the process of being constructed in the Otay Mesa area. The District serves a wide spectrum of communities including southern El Cajon, La Mesa, Rancho San Diego, Jamul, Spring Valley, Bonita, eastern City of Chula Vista, East Lake, Otay Ranch, and Otay Mesa areas. The water purveyors that border the District include Padre Dam Municipal Water District on the north, Helix Water District on the northwest, and the Sweetwater Authority and the City of San Diego on the west. The southern boundary of the District is the international border with Mexico. A map showing the regional jurisdictional boundaries within the District is shown on Figure 3-1. There is currently no adjacent water purveyor located to the east of the District, which provides an opportunity for service for future land uses, such as the Otay Ranch General Development Plan (GDP) Area of Influence. As shown in Figure 3-1, the boundary encompassing the District’s potable water system customers is expected to expand in the near future to include customers in the sphere of influence. Otay Water District 2025 Urban Water Management Plan June 2026 Chapter 3: Service Area Description 3-2 FIGURE 3-1: OTAY WATER DISTRICT SERVICE AREA Note: The District’s service area boundary is expected to expand from the currently served customers to encompass the District’s Sphere of Influence as land use changes and growth occurs. For the purposes of this UWMP, the District’s full Sphere of Influence boundary was used to forecast demand between 2030 and 2050. Otay Water District 2025 Urban Water Management Plan June 2026 Chapter 3: Service Area Description 3-3 3.2 Service Area Population and Demographics The District’s service area population has grown from approximately 48,300 in 1980 to a 2025 population of 238,966. Data on the future rate of growth within the District were obtained from the SANDAG Series 15 Regional Growth Forecast (Version 17) developed for its 2025 Regional Plan, which predicts changes to economics and demographics in San Diego County through 2050. These predictions are made based upon available local land use plans and anticipated changes to local plans and policies. The SANDAG growth forecasts align with the land use inventory in the adopted general plan for each city and for the County of San Diego in a base year of 2022. These general plans incorporate spheres of influence adopted by LAFCO, which define the probable physical boundaries and service areas of the local governments. In addition to the land use inventory, SANDAG included information from its Regional Employment Inventory, which includes employment locations sourced from California’s Employment Development Department and the Department of Defense’s Defense Manpower Data Center Active-Duty Military Personnel Master File. Once SANDAG developed regionwide forecast totals for population, housing, and jobs, it then collaborated with all 19 jurisdictions (the 18 cities and the County of San Diego) to review and verify the parcel-level capacity data, which guides the Series 15 Regional Growth Forecast totals in subregional areas. Information on permitted projects in the development pipeline was also collected from jurisdictions during a review period in 2023 and incorporated into the Series 15 Regional Growth Forecast (SANDAG 2025). The District asked SANDAG to provide population projections by Master Geographic Reference Areas (MGRAs) to project more precise water usage trends and prepare for potential future development. The estimated service area population is shown in Table 3-1. TABLE 3-1: POPULATION – CURRENT AND PROJECTED DWR Submittal Table 3-1 Retail: Population - Current and Projected Water Code Section 10631(a) Population Served 2025 2030 2035 2040 2045 2050 238,966 257,311 274,714 295,723 297,977 300,231 Notes: Population in 2025 reflects area of current customers, whereas 2030-2050 reflects the District’s Sphere of Influence customers. Source: SANDAG Series 15 (Version 17) forecast. Notable patterns in population, housing, and employment growth in the SANDAG Series 15 Forecast include an anticipation that a majority of housing growth will consist of multifamily units, as opposed to single-family. Additionally, regional conservation efforts have expanded, with more than half of the region preserved as open space, parks, or habitat. Employment growth is expected to expand significantly in the Otay Mesa area, an economic gateway for the region. New communities in eastern Chula Vista are expected to contribute to significant employment growth in Chula Vista (SANDAG 2025). 3.3 Land Use within the Service Area The District’s water service planning area comprises three land use planning agencies: the City of San Diego, the City of Chula Vista, and the County of San Diego. Documents that govern land use planning in these jurisdictions consist of the City of San Diego General Plan, the City of Chula Vista General Plan, and the Otay Water District 2025 Urban Water Management Plan June 2026 Chapter 3: Service Area Description 3-4 County of San Diego General Plan. All three include various sub-regional and community level plans within the District. The District’s service area includes a range of land use types, including: • Residential (low-, medium-, and high-density) • Commercial and Retail Centers • Office and Institutional Uses (e.g., schools, libraries, government facilities) • Industrial and Business Parks • Mixed-Use and Transit-Oriented Developments • Public Parks, Open Space, and Habitat Conservation Areas Approximately 85% of the District’s customers are single-family residences. Much of the anticipated development in the District’s service area is also single-family residential, although the proportion of multi-family residences has been increasing in recent years and will continue to increase through 2050, as shown in Figure 3-2. FIGURE 3-2: OTAY WATER DISTRICT LAND USE FORECAST, SANDAG The City of Chula Vista Otay Ranch area features a substantial amount of planned residential and mixed-use development, along with preserved open space under the Multiple Species Conservation Program (MSCP). The City of San Diego portion of the service area includes portions of the Otay Mesa community, 0 2,000 4,000 6,000 8,000 10,000 12,000 14,000 16,000 18,000 20,000 22,000 24,000 26,000 28,000 2026 2029 2032 2035 2040 2050 Ac r e s Otay Water District Land Use Forecast Single Family Multi-Family Mobile Home Mixed Use Commercial Office Industrial Agriculture School Otay Water District 2025 Urban Water Management Plan June 2026 Chapter 3: Service Area Description 3-5 characterized by industrial, commercial, and residential uses. The County of San Diego governs primarily rural and semi-rural lands, with existing agricultural, low-density residential, and conservation/open space uses. Future land uses within the District’s anticipated service area are guided by: • The City of Chula Vista General Plan • The City of San Diego General Plan and the Otay Mesa Community Plan • The County of San Diego General Plan, particularly the Otay Subregional Plan and East Otay Mesa Specific Plan These plans forecast significant growth in: • High- and medium-density residential development in Chula Vista and Otay Mesa, • Mixed-use urban villages and transit-oriented corridors, especially in the Millenia and University/Innovation District areas, • Commercial and employment centers, including light industrial areas, • Public institutions, such as a planned university campus, civic facilities, and regional parks. • Open space and conservation areas will also expand, particularly in unincorporated areas governed by the County’s MSCP and Chula Vista’s greenbelt system. 3.4 Service Area Climate Climatic conditions within the service area are characteristically Mediterranean near the coast, with mild temperatures year-round. Inland areas are both hotter in summer and cooler in winter, with summer temperatures often exceeding 90 degrees and winter temperatures occasionally dipping to below freezing. Most of the region’s rainfall occurs December through March. Total average annual rainfall is approximately 11.99 inches per year. Historic climate data were obtained from the Western Regional Climate Center (WRCC) for Station 042706 (El Cajon) from 2005-2025 (WRCC 2025). This station was selected for temperature and rainfall because its annual temperature variation is representative of most of the District’s service area. While there is a station in Chula Vista, the temperature variation at the Chula Vista station is more typical of a coastal environment, which is less variable than the conditions in most of the District’s service area, which is more inland. Evapotranspiration data were obtained from the California Irrigation Management Information System (CIMIS) from 2005-2025. Because conditions in the service area vary from coastal areas to inland areas, evapotranspiration (ETo) data are reported for two stations: 147 (Otay Lakes) and 153 (Escondido SPV). Average total rainfall and temperature data were obtained from the WRCC for Station 042706 (El Cajon). Climate and evapotranspiration data are summarized in Table 3-2 and the typical annual distribution for temperature, precipitation, and evapotranspiration are shown in Figure 3-3. Otay Water District 2025 Urban Water Management Plan June 2026 Chapter 3: Service Area Description 3-6 TABLE 3-2: CLIMATE DATA Monthly Average Evapotranspiration (inches) Monthly Average Evapotranspiration (inches) Average Monthly Total Rainfall (inches) Average Temperature (Fahrenheit) Month Otay Lakes No. 147 Escondido SPV No. 153 El Cajon (042706) El Cajon (042706) January 2.59 2.62 2.93 56 February 3 3.06 2.30 57 March 3.97 4.21 3.50 59 April 5.05 5.39 0.23 63 May 5.27 5.99 0.17 65 June 5.95 6.89 0.02 71 July 6.49 7.68 0.02 76 August 6.07 7.03 0.39 78 September 4.62 5.24 0.06 75 October 3.92 4.22 0.31 69 November 3.13 3.11 0.72 62 December 2.17 2.08 1.34 57 Annual Total 52.23 57.51 11.99 66 FIGURE 3-3: TEMPERATURE, PRECIPIATION, AND EVAPOTRANSPIRATION DISTRIBUTION 0 10 20 30 40 50 60 70 80 90 0 1 2 3 4 5 6 7 8 Te m p e r a t u r e ( °F) Mo n t h l y E T o , R a i n f a l l ( I n c h e s ) Average Monthly Variables Average Monthly Rainfall, Temperature, and Evapotranspiration ETO Rainfall Temperature Otay Water District 2025 Urban Water Management Plan June 2026 Chapter 3: Service Area Description 3-7 3.5 Climate Change Impacts The District acknowledges the inherent challenges of providing a reliable water supply in a semi-arid climate already prone to prolonged drought cycles and limited local water sources. Climate change has resulted in increased weather extremes and variability resulting in significant deviations from historical averages and greatly impacting water supply planning decisions. These extremes are expected to cause longer seasonal dry periods within the region and increase evaporation. The region's dependency on imported water from the Colorado River and Northern California, both of which face their own climate-related stresses, adds a layer of vulnerability to long-term water supply reliability. Seasonal shifts in precipitation patterns, reduced snowpack levels in the Sierra Nevada, and rising temperatures are altering runoff timing and reducing overall water availability. These factors, combined with growing population demands, intensify the strain on both imported and local supplies. The vulnerability of the water resources in California to climate change stems from a modified hydrology that affects the frequency, intensity, and duration of extreme events, which, in turn, affect water quantity, quality, and infrastructure. The California Climate Science and Data for Water Resources Management (DWR 2015) report summarizes climate change indicators, implications, and strategies for water managers in California under key climate-induced factors. While uncertainties remain regarding the exact timing, magnitude, and regional impacts of these temperature and precipitation changes, researchers have identified several areas of concern for California water planners. These include: • Reduction in Sierra Nevada snowpack; • Increased intensity and frequency of extreme weather events; and • Rising sea levels resulting in increased risk of damage from storms, high-tide events, and the erosion of levees. Other important issues of concern due to global climate change include: • Effects on local supplies such as groundwater; • Changes in urban and agricultural demand levels and patterns; • Impacts to human health from waterborne pathogens and water quality degradation; • Declines in ecosystem health and function; and • Alterations to power generation and pumping regimes. Typically, water supplies that are dependent on natural hydrology are vulnerable to climate change, especially if the water source originates from mountain snowpack. The most vulnerable water sources subject to climate change impacts are the District’s imported water supplies from the Water Authority. The Water Authority recognizes the importance of adapting to climate change. The Water Authority is an active and founding member of the Water Utility Climate Alliance (WUCA). WUCA consists of twelve of the nation’s largest water providers collaborating on climate change adaptation and greenhouse gas mitigation issues. WUCA monitors development of climate change-related research, technology, programs, and federal legislation. In addition, the Water Authority became a founding member of the Center for Western Weather and Water Extremes (CW3E) Water Affiliates Group (WAG) in 2020. The WAG provides water leaders with information on advances in atmospheric river and drought research that can be used to improve water Otay Water District 2025 Urban Water Management Plan June 2026 Chapter 3: Service Area Description 3-8 management, mitigate flood risk, and increase water supply reliability. The WAG also connects like-minded water managers to share best practices in forecast-informed water operations and provides practical tools to support core water management services (SDCWA 2020). The variability in year-to-year rainfall makes it increasingly difficult to rely on historical hydrologic patterns for future planning, requiring a shift toward more adaptive, flexible water management approaches. Ensuring long-term water reliability in this changing climate will require significant coordination among regional partners, sustained investment in diversified water supply portfolios, and continued innovation in conservation and efficiency practices. Otay Water District 2025 Urban Water Management Plan June 2026 Chapter 4: Water Use Characterization 4-1 4. WATER USE CHARACTERIZATION As part of the UWMP, California regulation requires water suppliers to quantify past and current water use and to project the total water demand for the water system through the next twenty years in five-year increments. Projections of future water demand allow a water supplier to analyze if future water supplies are adequate, as well as help the agency when sizing and staging future water facilities to meet water use targets. Projected water use, combined with population projections, provides the basis for estimating future water requirements. This chapter provides the District’s past and current water use and water use projections throughout the year 2050. In this chapter, the terms “water use” and “water demand” have been used interchangeably. This chapter provides a summary of potable water and recycled water demand. 4.1 Existing Water Use by Customer Class California regulation (Water Code Section 10631(d)) requires water suppliers to quantify past and current water use by the following defined sectors: single family residential; multi-family residential; commercial; industrial; institutional and governmental; landscape; sales to other agencies; saline water intrusion barriers, groundwater recharge, or conjunctive use; agricultural; and distribution system water loss. The District supplies water to various account types, which are grouped into the defined sectors as follows: • Single Family Residential: account types “residential” and “residential 1-inch meter” and “residential attached/individual meter” • Multi-Family Residential: account types “multi-residential,” “multi-residential 6-inch meter” • Commercial: account types “commercial” and “commercial recycled” • Institutional and Governmental: account type “public agency” • Landscape: account types “commercial irrigation,” “irrigation outside,” “public agency irrigation” and “public outside” • Agricultural: account type “agriculture” • Other: includes all other account types such as “construction,” “fire service,” “outside user other,” “OWD meter,” and “sewer only” Current water use by customer class is summarized in Table 4-1. Otay Water District 2025 Urban Water Management Plan June 2026 Chapter 4: Water Use Characterization 4-2 TABLE 4-1: DEMANDS FOR POTABLE AND NON-POTABLE WATER – ACTUAL DWR Submittal Table 4-1 Retail: 2025 Actual Total Uses for Potable and Non-Potable Water Water Code Section 10631(d)(1) Water Use Type Additional Description Level of Treatment 2025 Actual Water Use (AFY) Single Family Potable 14,413 Multi-Family Potable 4,547 Commercial Potable 3,304 Institutional; Governmental Potable 1,665 Landscape Potable 3,834 Agricultural Potable 6 Other Construction, fire service, outside use, OWD meter, sewer Potable 711 Distribution System Water Loss Real losses + Apparent losses Potable 1,520 Commercial Golf course irrigation Non-Potable 391 Landscape Excluding golf courses Non-Potable 4,701 Other Construction Non-Potable 78 Subtotal Potable 30,000 Subtotal Non-Potable 5,170 Total 35,170 4.2 Past Water Use Although the population in Otay’s service area has grown over the past fifteen years, total potable water use has not significantly grown, as shown in Table 4-2, Table 4-1 and Figure 4-1 (Otay Water District 2011; Otay Water District 2016; Otay Water District 2021). Single family residential, institutional/governmental, and potable water for landscaping water use declined between 2010 and 2020, although water use in the landscaping and institutional/governmental sectors increased slightly in 2025. The decline in single-family residential water use can be attributed to increased water use efficiency in residential appliances and landscape irrigation. Multi-family residential and commercial water use increased during the same period, 2010-2025, reflecting increased development within the service area. Total non-potable water use declined in 2020, but has generally increased between 2010 and 2025 (Table 4-3 and Table 4-1). Otay Water District 2025 Urban Water Management Plan June 2026 Chapter 4: Water Use Characterization 4-3 TABLE 4-2: HISTORICAL POTABLE WATER DEMANDS Year 2010 2015 2020 Service Area Population 198,616 217,339 225,870 Water Use Type Actual Potable Water Use (AFY) Single Family Residential 17,165 16,641 14,040 Multi-Family Residential 3,605 3,403 3,807 Commercial 2,243 2,675 3,098 Institutional/Governmental 1,867 2,026 1,630 Landscape 3,732 4,121 3,582 Other 0 513 180 Distribution System Water Loss 607 920 1,111 Total Water Use 29,219 30,299 27,448 TABLE 4-3: HISTORICAL NON-POTABLE WATER DEMANDS Year 2010a 2015 2020 Water Use Type Actual Non-Potable Water Use (AFY) Landscape Irrigation (excluding golf courses) 4,000 4,070 3,153 Golf Course Irrigation 270 180 Total Water Use 4,000 4,340 3,333 a. 2010 UWMP did not distinguish recycled water use between golf course and other landscape irrigation: “Uses consist primarily of commercial landscape irrigation, golf course irrigation, and irrigation of public places like parks, streetscapes, schools, highway medians, and open space areas (Otay Water District 2011).” Otay Water District 2025 Urban Water Management Plan June 2026 Chapter 4: Water Use Characterization 4-4 FIGURE 4-1: SERVICE AREA POPULATION AND POTABLE WATER USE BY TYPE (2010-2025) 4.3 Projected Water Use The District’s service area boundary is expected to expand from the currently served customers to encompass the District’s Sphere of Influence as land use changes and growth occurs. For the purposes of this UWMP, the District’s full sphere of influence boundary was used to forecast demand between 2030 and 2050. As discussed in Section 3.2, the District projected future water demands using the most recent population and employment forecast data for the District’s service area using SANDAG’s Series 15 Regional Growth Forecast (SANDAG 2024). SANDAG’s forecast is based on U.S. Census data, annual population and housing estimates produced by California Department of Finance, and local inputs gathered from the region’s 18 incorporated cities and unincorporated county areas. In addition to providing the information necessary for the District to project future demands, using SANDAG’s Series 15 data also allows the District to maintain consistency with assumptions used by its wholesale provider, which also relies on SANDAG Series 15 data for its regional demand projections. The water use forecasts in this UWMP use SANDAG projections by MGRA. Data from the MGRAs that are only partially within the District’s service area were area-weighted (i.e., scaled based on the proportion of the area of the MGRA located within District’s service area) to estimate the portion of population, housing and jobs within the District’s portion of the MGRA. SANDAG forecasting encompassed the years 2026, 2029, 2032, 2035, 2040, and 2050, which did not precisely align with the five-year periods required for the UWMP (i.e., 2030, 2035, 2040, 2045, 2050). Forecasts of population, housing, and jobs for the five-year periods were estimated with straight-line linear interpolations based on the available years. 0 50,000 100,000 150,000 200,000 250,000 300,000 0 5,000 10,000 15,000 20,000 25,000 30,000 35,000 2010 2015 2020 2025 Po p u l a t i o n Po t a b l e W a t e r U s e ( A F Y ) Single Family Residential Multi-Family Residential CommercialInstitutional/Governmental Landscape Distribution System Water LossOtherService Area Population Otay Water District 2025 Urban Water Management Plan June 2026 Chapter 4: Water Use Characterization 4-5 To forecast demands by water use type, the District’s actual water use was summed over a historical six-year period (July 2019 through June 2025) for each water use type. Considering historical demands over an extended period, represents current water use per sector while reducing the effects of annual variability. It also accounts for seasonal and long-term climate fluctuations, conservation ordinances, drought restrictions, and demographic changes. Information on conservation and drought restrictions was derived from the State Water Resources Control Board Water Conservation Portal (State Water Resources Control Board 2024). A per-unit factor was generated for each water use type as follows: • Residential: Total consumption for single family and multi-family use types was divided by the total number of occupied single family or multi-family households over the historic time period (2019-2025), resulting in a gallons-per-day unit factor. Historic household data were obtained from the US Census Bureau American Community Survey. • Commercial/ Institutional: Total historic water consumption by use type was divided by the total number of jobs over the historic time period (2019-2025), resulting in a gallons-per-day unit factor. Employment data were obtained from SANDAG. • Irrigation: Total use was divided by the total number of occupied households (both single family and multi-family) over the historic time period, resulting in a gallons-per-day outdoor irrigation unit factor. • Other: Total use by all of the “other” account types was divided by the total number of occupied households (both single family and multi-family) over the historic time period, resulting in a gallons-per-day “other” outdoor unit factor. The demand factors were then used to forecast future water use by use type. Future water use by type was projected by applying the demand factors to forecasts of population, housing, and employment, using the methods described below: o Residential: Single Family Residential (SFR) and Multi-Family Residential (MFR) use was estimate by applying the demand factor to projected housing growth, based on the estimated number of households in each category. Housing growth projections were obtained from SANDAG. o Commercial/ Institutional: Commercial and governmental use were estimated by applying the gallons-per-unit factor to employment projections, which came from SANDAG forecasts. The District does not have any measurable industrial demand. o Irrigation: Usage was estimated by applying the irrigation gallons-per-unit factor to single family and multi-family housing growth, based on the SANDAG forecasts. o Agriculture: Usage is low in the District and was kept at five AFY in the demand forecast, commensurate with historic demand. o Other: Other water uses include construction, fire service, and sewer. Construction and sewer water use were estimated by applying the “other” demand factor to housing projections. o Distribution System Loss: Loss estimates were based on the average water loss reported in the District’s AWWA Water Audits during the historic period (FY 2019-2024), resulting in an average of 4.1% of water supplied. Otay Water District 2025 Urban Water Management Plan June 2026 Chapter 4: Water Use Characterization 4-6 Forecasts were conducted for the North District Service Area, the Central system of the South District Service Area, and the Otay Mesa system of the South District Service Area. The separate demand forecasts for each area are summarized in Table 4-4, Table 4-5, and Table 4-6. Forecasted potable water use over the entire service area by customer category through 2050 is displayed in Table 4-7 below. TABLE 4-4: PROJECTED DEMANDS FOR POTABLE WATER – NORTH DISTRICT SERVICE AREA Use Type 2030 2035 2040 2045 2050 Single Family Residential 5,286 5,337 5,374 5,404 5,435 Multi-Family Residential 1,096 1,097 1,097 1,097 1,096 Commercial 557 596 636 664 692 Institutional/Public 338 362 386 403 420 Agriculture 5 5 5 5 5 Irrigation/Outdoor Use 974 982 987 991 995 Other 23 23 23 23 23 Water Loss 338 343 347 350 353 Total 8,617 8,745 8,855 8,937 9,019 TABLE 4-5: PROJECTED DEMANDS FOR POTABLE WATER – CENTRAL SYSTEM OF SOUTH DISTRICT SERVICE AREA Use Type 2030 2035 2040 2045 2050 Single Family Residential 9,236 9,491 9,720 9,594 9,426 Multi-Family Residential 6,835 8,781 10,625 11,643 12,799 Commercial 1,556 1,779 2,185 2,578 2,970 Institutional/Public 551 630 774 913 1,052 Agriculture 0 0 0 0 0 Irrigation/Outdoor Use 2,275 2,550 2,809 2,913 3,026 Other 200 224 246 256 265 Water Loss 842 956 1,075 1,137 1,204 Total 21,495 24,411 27,434 29,034 30,742 Otay Water District 2025 Urban Water Management Plan June 2026 Chapter 4: Water Use Characterization 4-7 TABLE 4-6: PROJECTED DEMANDS FOR POTABLE WATER – OTAY MESA SYSTEM OF SOUTH DISTRICT SERVICE AREA Use Type 2030 2035 2040 2045 2050 Single Family Residential 01 39 101 75 57 Multi-Family Residential 290 436 1,132 1,237 1,326 Commercial 1,469 1,634 1,983 2,183 2,383 Institutional/Public 901 1,002 1,216 1,339 1,461 Agriculture 0 0 0 0 0 Irrigation/Outdoor Use 56 103 267 287 304 Other 5 10 26 28 29 Water Loss 111 131 193 210 227 Total 2,832 3,355 4,918 5,359 5,787 4.3.1 Recycled Water Demand Recycled water is used for landscape irrigation, commercial golf course irrigation, and construction (included under the “Other” water use category). Recycled water can only be used in areas outside of the Sweetwater and Lower Otay reservoirs drainage areas, within the District’s central system area. Some increases in recycled water demand are anticipated due to future development and economic growth, and compliance with AB 1572 (for further discussion see Section 6.1.3.4). Forecasts for recycled water use were calculated similarly to the methods used for potable demands described above. The historic recycled water use was equivalent to actual 2025 demands. Growth factors were calculated based on SANDAG estimates and forecasts of employment and household growth, depending on the water use category. For the purposes of this analysis, it was assumed recycled water use for golf course irrigation would remain constant over the planning horizon, at historic average levels. It was assumed construction recycled use would also not grow, but remain steady, over the planning horizon. The recycled demand forecast assumes that recycled water service has been and will only be available in the central system area, due to the prohibition on the use of recycled water in the Sweetwater and Lower Otay reservoirs drainage areas, and the District’s implemented moratorium on the use of recycled water in the Otay Mesa system area (further discussion can be found in Section 6.1.3.4). Projections of future recycled water demand are included in Table 4-7. 4.3.2 Near-Term Annexations The District anticipates that additional lands will be annexed into its service area, including the following near-term annexations: • Otay Ranch Village 13 - Village 13 is the portion of the Proctor Valley Parcel (part of the Otay Ranch General Development Plan) currently located outside the District’s boundary. The land use mix will 1 According to the SANDAG regional forecasts, the total number of occupied single family homes in MGRAs within the Otay Mesa system will drop from twelve to zero between 2022 and 2032, before beginning to grow in 2035, and the land acres dedicated to single family use will decline between 2022 and 2032, before beginning to grow in 2035. Furthermore, local developer plans do not anticipate adding single family units in the Otay Mesa system. Otay Water District 2025 Urban Water Management Plan June 2026 Chapter 4: Water Use Characterization 4-8 include approximately 2,750 dwelling units, 16.7 acres of resort/hotel, 24.6 acres of parks, and up to 20,000 square feet of commercial office uses, and a 10.1-acre school site. Village 13 will be annexed into the District to receive water service. • Peaceful Valley Ranch - 152.4 acres for a proposed estate residential development, to develop 52 estate residential units, and equestrian uses and amenities. • Stoddard Ranch – 8-acre lot with existing home, adjacent to Otay's boundary and the proposed Peaceful Valley Ranch annexation. • San Ysidro Mountains Parcel, Planning Area 17 – The land areas included within the 2,411-acre San Ysidro Mountains Parcel, part of the Otay Ranch General Development Plan, includes Planning Area 17. Planning Area 17 is planned to include 296 single-family units over 800 acres. The entire parcel currently lies outside of the District's boundaries, but within its Area of Influence. Projections of future water use from Near Term Annexations are included in Table 4-7. Otay Water District 2025 Urban Water Management Plan June 2026 Chapter 4: Water Use Characterization 4-9 TABLE 4-7: PROJECTED TOTAL USES OF POTABLE AND NON-POTABLE WATER (2030 – 2050) (AFY) DWR Submittal Table 4-2 Retail: Total Uses of Potable, and Non-Potable Water - Projected Water Code Section 10631(d)(1) Water Use Type (with additional description) Level of Treatment Projected Water Use (AFY) 2030 2035 2040 2045 2050 Single Family Potable 14,522 14,867 15,195 15,073 14,918 Multi-Family Potable 8,221 10,314 12,854 13,977 15,221 Commercial Potable 3,582 4,009 4,804 5,425 6,045 Institutional; Governmental Potable 1,790 1,994 2,376 2,655 2,933 Landscape Potable 3,305 3,635 4,063 4,191 4,325 Agricultural Potable 5 5 5 5 5 Other (Construction, fire service, outside use, OWD meter, sewer) Potable 228 257 295 307 317 Other (Near-term annexations) Potable 2,016 2,086 2,086 2,086 2,086 Distribution System Water Loss (Real losses + Apparent losses) Potable 1,291 1,430 1,615 1,697 1,784 Commercial (Golf course irrigation) Non-Potable 364 364 364 364 364 Landscape (Irrigation excluding golf courses) Non-Potable 5,082 5,696 6,274 6,505 6,758 Other (Construction) Non-Potable 78 78 78 78 78 Subtotal Potable 34,960 38,597 43,293 45,416 47,634 Subtotal Non-Potable 5,524 6,138 6,716 6,947 7,200 Total 40,484 44,735 50,009 52,363 54,834 4.3.3 Regional Coordination on Projected Water Use As mentioned in Section 2.3, the District relies upon the Water Authority for its potable water supply and the District worked with the Water Authority on shared information for water demand projections. The Water Authority relies on a regional, customized, statistical model to develop long-range demand forecasts for its entire service area. The Water Authority’s method for estimating water demand projections is similar to the District’s methods in that the Water Authority’s model uses demographic and economic projections from the SANDAG Series 15 Regional Growth Forecast, and incorporates information about local planned developments. The District provided the Water Authority with documentation on development plans in its service area, and both UWMPs incorporated the same developer-specific information into their demand forecasts. In addition, the District provided the Water Authority with information on anticipated Near-Term Annexations, and these annexations are reflected in both UWMP demand forecast models. However, the Water Authority’s model is different from the District’s in that it incorporates a complex collection of datasets into a statistical model. In addition, the Water Authority observes a smaller service area boundary Otay Water District 2025 Urban Water Management Plan June 2026 Chapter 4: Water Use Characterization 4-10 than the District, defined by current customers and Near-Term Annexations. The District has elected to forecast water demand for its sphere of influence, in order to more conservatively plan for future water use. As such, the Water Authority’s UWMP presents a projected Otay Water District normal year demand on the Water Authority that is slightly less than the District’s projected potable water. In meetings between the Water Authority and the District during the 2025 UWMP planning cycle, the Water Authority confirmed that the minor differences in forecasted water use are not an issue for long-range reliability planning in the County. 4.3.4 Climate Change Effects on Water Use The impacts of climate change are expected to affect water demands statewide. Climate change-related changes in local temperature and precipitation are expected to alter water demand patterns in the District’s service area. Under climate change, droughts are expected to be more frequent and more intense, while storms are expected to be more intense with heavy rainfall occurring over relatively short time periods. Together these impacts can alter patterns of water use. Per the Water Code, the District has included consideration of climate change in its demand projections, by incorporating the analysis included in Section 2.4.5 in the Water Authority’s 2025 UWMP (San Diego County Water Authority 2026). The Water Authority has included a description of how climate change impacts were included in its demand modeling for each of its’ member agencies. To address the uncertainty of future conditions, the Water Authority has adopted a qualitative evaluation approach using five climate scenarios in the CWA-Main model to develop its projections, as detailed below: • The Warm/ Wet scenario, which consists of relatively large increases in both average temperatures and precipitation; • The Warm/ Dry scenario, which includes relatively large increases in average temperature and relatively large decreases in average precipitation; • The Cool/ Wet scenario, which comprises relatively small increases in average temperature and relatively large increases in precipitation; • The Cool/ Dry scenario, which includes relatively small increases in average temperature and relatively large decreases in precipitation; and • The Moderate scenario, made up of moderate increases in average temperature and moderate changes in precipitation. The climate change-influenced demand for each member agency was forecasted using the selected scenario’s precipitation and temperature data for the individual member agency’s location within the region. This allowed for demand forecasts for a particular member agency, such as the District, to be specific, but remain consistent and realistic for the region. The Water Authority ran the climate scenarios through two different time periods, 2045-2065 and 2080-2100. All scenarios resulted in warming temperatures, with projected increases from 2080-2100 being significantly higher than the temperature increases projected for 2045-2065. In contrast, regional precipitation projections are not significantly higher or lower than historical conditions in either time period. Otay Water District 2025 Urban Water Management Plan June 2026 Chapter 4: Water Use Characterization 4-11 Using the 2045-2065 analysis, most climate scenarios resulted in consistent warming through the planning horizon, and little change in seasonal precipitation. Increases in water demand ranged from 0.4% (in the Moderate scenario) to 3.3% (in the Warm/ Dry scenario) in 2050. Increases in water demand were more extreme under the 2080-2100 analysis at 2.1% (in the Cool/ Dry scenario) to 11% (in the Warm/ Dry scenario) relative to the baseline results. 4.3.5 Future Conservation Savings The District’s demand forecast incorporates estimates of future conservation savings in normal year projections by using historic data spanning July 2019 through June 2025. Conservation and drought restrictions were in place during portions of this timeframe. Between March 2022 and May 2023, the District was enforcing level 1 and/or level 2 drought restrictions. Thus, a degree of conservation savings is reflected in the historic demands that form the basis of the normal year demand forecast. TABLE 4-8: INCLUSION IN WATER USE PROJECTIONS DWR Submittal Table 4-3 Retail: Inclusion in Water Use Projections Water Code Section 10631 (a), 10631 (d)(4)(A), and (d)(4)(B) Are Future Water Savings Included in Projections? Yes If "Yes" to above, state the section or page number, in the cell to the right, where citations of the codes, ordinances, or otherwise are utilized in demand projections are found. Section 4.2 Are Lower Income Residential Demands Included In Projections? Yes 4.3.6 Water Use for Lower Income Households As defined by the State of California, a lower income household is one that has an income below 80% of area median household income (MHI), adjusted for family size (California Air Resources Board 2022). Disadvantaged communities (DACs) are areas, usually Census tracts, with an MHI below 80% of the statewide MHI, rather than the area MHI like the lower-income households. In Figure 4-2, the District’s sphere of influence is highlighted in blue, low-income Census tracts are hatched, and DACs are indicated in pink. The District overlaps one Census tract defined as a DAC in 2023, near Castle Park, and a low-income Census tract not designated as a DAC in Otay Mesa (DWR 2025b). The District’s boundaries align with the southeast boundary of an additional DAC between Spring Valley and La Presa. Per the Water Code, the District has included the projected water use for lower-income households in its 2025 UWMP as indicated in Table 4-8. The District’s water use projections rely on the expected growth in households from the SANDAG Series 15 forecast, which depends on the adopted general plan for each city in San Diego and for the County of San Diego using a base year of 2022. The general plans – and, thus, the SANDAG forecasts – are adjusted to reflect the regional housing needs of lower income households. Water demands from lower income households have been assumed to be included as part of the general growth within the District and are therefore reflected in the District’s potable water demand projections. Otay Water District 2025 Urban Water Management Plan June 2026 Chapter 4: Water Use Characterization 4-12 FIGURE 4-2: LOW-INCOME AND DISADVANTAGED COMMUNITIES IDENTIFIED BY DWR Otay Water District 2025 Urban Water Management Plan June 2026 Chapter 4: Water Use Characterization 4-13 4.4 Distribution System Water Losses Distribution system water losses (also known as “real losses”) are the physical water losses from the water distribution system and storage facilities, up to the point of customer delivery. These real losses typically include legitimate uses that are not metered, such as street cleaning, hydrant flushing and fire suppression, as well as unaccounted for water, such as meter errors and system leaks. The District uses the American Water Works Association (AWWA) Method and Guidebook worksheet to report and calculate system losses. The District’s reported losses for the last five years can be found at the following link, https://wuedata.water.ca.gov/awwa_plans, as stated in Table 4-9 below, and in Appendix D. TABLE 4-9: WATER LOSS AUDIT REPORTING DWR Submittal Table 4-5 Retail: Water Loss Audit Reporting Water Code Section 10631(d)(3)(A) Public Water System ID # Reporting Period Submitted to DWR Water Loss Audit Program CA 3710034 2020 Yes 2021 Yes 2022 Yes 2023 Yes 2024 Yes Notes: The District's submitted Water Loss Audit Reports can be downloaded from the WUEdata portal at this link: https://wuedata.water.ca.gov/awwa_plans 4.5 Progress Toward Meeting the Water Loss Performance Standards The State Water Board Water Loss Performance Standards, adopted in 2022 and effective in 2023, establish system-specific water loss limits that retail water suppliers with more than 200 service connections must meet by 2028. Per Water Code Section 10631(d)(3)(C), the District is required to provide data in its 2025 UWMP demonstrating whether it is on track to meet its assigned water loss standard by the 2028 compliance year. Table 4-10 summarizes the District’s progress towards the 2028 Water Loss Standards utilizing its FY 2025 AWWA Water Loss Audit. The District’s 2028 Real Water Loss Standard is 15.2 gallons per service connection per day (GPSCD), and its 2028 Apparent Water Loss Standard is 5.6 GPSCD. In FY 2025, the District reported real and apparent water losses of 19.3 and 5.8 GPSCD, respectively. Although the District has not yet met its Real or Apparent Water Loss Standards, it has until 2028 to achieve compliance and is actively implementing measures to reduce system losses and meet these objectives. Otay Water District 2025 Urban Water Management Plan June 2026 Chapter 4: Water Use Characterization 4-14 TABLE 4-10: PROGRESS TOWARD 2028 WATER LOSS STANDARD DWR Submittal Table 4-6 Retail: Progress Towards 2028 Water Loss Standard Water Code Section 10631(d)(3)(c) Real Water Loss Apparent Water Loss Public Water System ID State Water Board 2028 Real Water Loss Standard (GPSCD) Most Recent AWWA Water Loss Audit Real Water Loss (GPSCD) State Water Board 2028 Apparent Water Loss Standard (GPSCD) Most Recent AWWA Water Loss Audit Apparent Water Loss (GPSCD) Number of Connections Volume of Total Real Loss (AF) Number of Connections Volume of Total Apparent Loss (AF) CA3710034 15.2 53,476 1,170.6 19.3 5.6 53,476 349.6 5.8 Notes: Water Board's Calculated Water Loss Standards available at: https://www.waterboards.ca.gov/conservation/docs/waterlosscontrol/standards-released.xlsx Otay Water District 2025 Urban Water Management Plan June 2026 Chapter 5: SB X7-7 Targets and Reporting 5-1 5. SB X7-7 TARGETS, AND REPORTING The Water Conservation Act of 2009, referred to as SB X7-7, required all urban water suppliers to reduce their per capita water use by 20% compared to a calculated baseline by 2020. The District’s baseline gallons per capita per day (GPCD) target was calculated using data on water use and population between 1999 and 2008. Water use spanning the baseline period was obtained from the recorded total volume of water purchased by the District from the Water Authority in each year between 1999 and 2008. Population data spanning the baseline period were obtained from SANDAG Series 13, which incorporated data from the 2010 United States Census. The District’s calculated 10-year (1999 to 2008) baseline per-capita water consumption was 191 GPCD. Thus, the District’s 2020 target was 153 GPCD, or 20% lower than the calculated baseline. As shown in Table 5-1 below, the District’s 2020 per capita demand target was determined to be 153 GPCD. The District met its per capita demand target in 2020 with total water use equivalent to 108 GPCD. TABLE 5-1: SB X7-7 2020 TARGET PROGRESS DWR Submittal Table 5-1 Retail: SB X7-7 2020 Target Progress Water Code Section 10608.40 Was Supplier part of a merger or consolidation since 2020? Regional Alliance Target or Individual Target? 2020 GPCD Target Actual 2020 GPCD Did Supplier Achieve Targeted Reduction for 2020? No Individual Target 153 108 Yes DWR and SWRCB have implemented reporting for the AB 1668 / SB 606 legislation, more commonly known as Making Conservation a California Way of Life. Reporting on compliance with this new legislation is not currently required for the 2025 UWMP. However, in the interest of demonstrating progress towards the new objectives, the District’s 2025 GPCD has been estimated at 112 (total potable water less deliveries to agricultural uses, divided by service area population, then divided by days). The District is still in compliance with its 2020 target. Otay Water District 2025 Urban Water Management Plan June 2026 Chapter 6: Water Supply Characterization 6-1 6. NORMAL YEAR WATER SUPPLY CHARACTERIZATION This section discusses the existing and planned water sources available to the District, along with the potential changes in supplies related to climate change. Wastewater and recycled water systems in the service area are also described and quantified. Finally, this section reports available information related to energy use associated with the District’s supplies. 6.1 Water Resources The District’s water supplies are composed of potable water purchased from the Water Authority, recycled water produced from the District’s Ralph W. Chapman Water Reclamation Facility (RWCWRF), and recycled water purchased from the City of San Diego, with other as-needed contracts, as described below. Water Authority supplies include imported and local surface water, desalinated water from the Carlsbad Desalination Plant, and imported water from the Imperial Irrigation District as part of a transfer agreement. Further information about this agreement can be found in the Water Authority’s UWMP. The District does not currently have its own supplies of groundwater, surface water, or stormwater. If needed, the District is authorized to purchase water supplies from the City of San Diego. While groundwater supplies may be considered in the future, as described below, no surface water or stormwater supplies are expected to be developed by the District in the foreseeable future and these supplies are not discussed further in this chapter. 6.1.1 Purchased or Imported Water Under normal conditions, District’s potable demands are met entirely with water purchased through the Water Authority. Existing potable water supply sources available to the District include purchases from the Water Authority, and back-up purchases from the City of San Diego’s Otay Water Treatment Plant on an as-needed and as-available basis. The supplies are further described below. 6.1.1.1 San Diego County Water Authority (Water Authority) The Water Authority, as a wholesale agency, imports both raw water and treated water for delivery to its member agencies in San Diego County, as well as provides some regionally generated local supplies. The Water Authority obtains its supplies from a diverse array of sources, including a conservation and transfer agreement with Imperial Irrigation District (IID) for Colorado River supplies, conserved water supply from the All-American and Coachella Canals, imported supplies from Metropolitan (mix of State Water Project supplies and Colorado River supplies), local surface water, and desalinated seawater from the Carlsbad Desalination Plant. More details on the Water Authority’s supplies can be found in their 2025 UWMP (San Diego County Water Authority 2025). The District receives potable water from the Water Authority via Pipeline Number 4 (Pipeline No. 4) of the Second San Diego Aqueduct (Second Aqueduct), and from the 36-inch Jamacha Pipeline. Pipeline No. 4 delivers potable water treated at one of three facilities: the Metropolitan Skinner WTP located in Riverside County, the Water Authority’s Twin Oaks Valley WTP in San Marcos, and the Water Authority’s Carlsbad Seawater Desalination Facility. The Jamacha Pipeline delivers water treated at the Helix WD’s Levy Filtration Plant. The Water Authority does not have contractual agreements with its member agencies to guarantee flow rates or hydraulic gradients at its various flow control facility connections. Generally, if the Water Authority Otay Water District 2025 Urban Water Management Plan June 2026 Chapter 6: Water Supply Characterization 6-2 cannot obtain sufficient treated and/ or raw water or has delivery limitations for the water requests of its 22 member agencies, the Water Authority will attempt to allocate the water delivery shortfall to its member agencies on a proportional basis. 6.1.1.2 City of San Diego Through a 1999 agreement with the City of San Diego, the District is authorized to purchase up to 10 million gallons per day (mgd) of supply from the City’s Otay WTP. Under the terms of the agreement, the City’s obligation to supply treated water to the District is contingent upon it having surplus capacity available, beyond what the City needs for its own area system. The Otay WTP has a current rated capacity of 34.4 mgd, and the City of San Diego’s typical demand on the Otay WTP is less than 20 mgd. Thus, there is usually surplus capacity available for the District to purchase. However, the District considers the supply of water from the Otay WTP to be an alternative source for use when the Water Authority Pipeline No. 4 is out of service. The District does not have permanent facilities to accept deliveries from the Otay WTP. Instead, a temporary “Lower Otay Pump Station” (TLOPS) conveys flows from a District interconnection when needed. The District has completed the design of a permanent Lower Otay PS (LOPS) but has deferred construction of the facility. The agreement with the City of San Diego for potable water from the Otay WTP is included in Appendix E. 6.1.2 Groundwater The District currently does not obtain any of its supply from groundwater, as noted in Table 6-1. The District has studied possible local groundwater development projects, but none to date have advanced to development. Both the geology and the semi-arid hydrologic conditions of the region limit groundwater supplies within the service area. Narrow river valleys with shallow alluvial deposits are characteristic of some of the more productive groundwater basins. Furthermore, irrigation with imported water and over-pumping has led to excessive salinity in many of the nearby basins. Outside of these alluvial basins, much of the geology consists of fractured crystalline bedrock and fine-grained sedimentary deposits that are generally incapable of yielding substantial supplies. The District is investigating local groundwater opportunities as a means of increasing supply reliability. These are not being actively pursued but may be investigated further in the future. Possible concept-level future groundwater projects are discussed in more detail in Section 6.1.8. TABLE 6-1: GROUNDWATER VOLUME PUMPED DWR Submittal Table 6-1 Retail: Groundwater Volume Pumped Water Code Section 10631(4) and 10631(4)(c) Check the box if the Supplier does not pump groundwater. Proceed to the next table. 6.1.3 Wastewater and Recycled Water The District’s recycled water supply is composed of recycled water produced from the District’s RWCWRF, and recycled water purchased on an as needed and as available basis from the City of San Diego’s South Bay Water Reclamation Plant (SBWRP). X Otay Water District 2025 Urban Water Management Plan June 2026 Chapter 6: Water Supply Characterization 6-3 6.1.3.1 Recycled Water Coordination The District and the City of San Diego participate in recycled water planning and operations within the District’s service area. The District owns and operates the RWCWRF and the recycled water distribution network. The RWCWRF is located near the intersection of Campo Road/ Highway 94 and Singer Lane within the Middle Sweetwater River basin. The City of San Diego owns and operates the SBWRP, in addition to regional interceptors and the Point Loma Wastewater Treatment Plant (WWTP). Recycled water in the District is sourced from both RWCWRF and SBWRP. 6.1.3.2 Wastewater Collection, Treatment, and Disposal Wastewater flows treated by the District originate in the Middle Sweetwater River basin, also known as the Jamacha Basin. A majority of these flows are diverted for treatment by the District, with the remainder being treated by the Spring Valley Sanitation District (SVSD), a subsidiary of the San Diego County Sanitation District. Collected wastewater from District customers and County customers comingle. Then, the comingled wastewater is sent to either the RWCWRF or to County treatment facilities. Current wastewater collection system flows for both agencies, the District and SVSD, totaled 606.79 million gallons in fiscal year 2025 (July 2024-June 2025). Of the comingled flows in fiscal year 2025, approximately 403.78 million gallons were treated at the RWCWRF, and approximately 203.00 million gallons bypassed the RWCWRF to the County’s treatment facilities. Wastewater collection in the District’s service area in 2025 is summarized in Table 6-2 by collection agency and treatment plant. The RWCWRF is a “scalping” treatment facility in that wastewater gets diverted to the RWCWRF to be treated to tertiary standards for non-potable use. Wastewater that is not treated by the facility for beneficial reuse continues to flow in the Rancho San Diego Outfall Facilities to the City of San Diego Metropolitan Wastewater System. Some of this wastewater is treated by the City of San Diego at its SBWRP at the secondary level, and the remainder is sent to the Point Loma WWTP for treatment at the advanced primary level and disposed of through an ocean outfall. The SBWRP takes flows from the South Metro Sewer Interceptor System. Table 6-3 summarizes the volumes of treatment and discharge in 2025. Otay Water District 2025 Urban Water Management Plan June 2026 Chapter 6: Water Supply Characterization 6-4 TABLE 6-2: WASTEWATER COLLECTED WITHIN SERVICE AREA IN 2025 DWR Submittal Table 6-2 Retail: Wastewater Collected Within Service Area in 2025 Water Code Section 10633(a) Wastewater Collection Recipient of Collected Wastewater Name of Wastewater Collection Agency Wastewater Volume Metered or Estimated? Volume of Wastewater Collected from UWMP Service Area 2025 Name of Wastewater Treatment Plant (WWTP) and Place ID Number Is WWTP Located Within UWMP Area? Otay Water District Metered 1,039 Ralph W Chapman WRF, Place ID 251548 Yes Otay Water District Metered 285 Point Loma WWTP & Ocean Outfall, Place ID 248796 No San Diego County Spring Valley Sanitation District Metered 623 Point Loma WWTP & Ocean Outfall, Place ID 248796 No City of Chula Vista Estimated 15,673 Point Loma WWTP & Ocean Outfall, Place ID 248796 No City of San Diego Estimated 858 Point Loma WWTP & Ocean Outfall, Place ID 248796 No City of San Diego Estimated 0 South Bay Water Reclamation Plant, Place ID 257831 No Total Wastewater Received from UWMP Service Area in 2025: 18,478 Notes: SBWRP flows are reported as 0 here because flows to SBWRP come from the South Metro Sewer Interceptor, but no information is readily available that can be used to estimate how much of the 15 MGD that SBWRP treats comes from the District’s service area. District flows to SBWRP are included in the flows to the Metro system shown here as going to Point Loma WWTP. Otay Water District 2025 Urban Water Management Plan June 2026 Chapter 6: Water Supply Characterization 6-5 TABLE 6-3: WASTEWATER TREATMENT AND DISCHARGE WITHIN SERVICE AREA IN 2025 DWR Submittal Table 6-3 Retail: Wastewater Treatment and Outcomes Within UWMP Service Area in 2025 Water Code Section 10633(a) Wastewater Treatment Plant Name and Place ID Number 2025 Volume of Wastewater Received from UWMP Service Area Volume of Wastewater Collected from UWMP Service Area 2025 Total 2025 Volume of Water Treated 2025 Outcomes of Treated Wastewater Water Recycled Within UWMP Service Area Water Recycled Outside of UWMP Service Area Effluent Discharge that is not a Permitted Recycled Water Use Required Discharge for Instream Flow Delivered to Another Entity for Additional Treatment Treatment Level Volume (AF) Treatment Level Volume (AF) Treatment Level Volume (AF) Treatment Level Volume (AF) Treatment Level Volume (AF) Ralph W Chapman WRF, Place ID 251548 Metered 1,039 1,039 Tertiary 1,039 n/a 0 n/a 0 n/a 0 n/a 0 Point Loma WWTP & Ocean Outfall, Place ID 248796 Metered 17,154 17,154 - 0 - 0 Advanced Primary 13,998 0 0 South Bay Water Reclamation Plant, Place ID 257831 Estimated 0 0 Tertiary 3,156 Tertiary 623 Secondary Disinfected 2,834 - 0 - 0 Total 18,193 18,193 4,195 623 16,832 0 0 Notes: As noted in Table 6-2, the flows to SBWRP are not easily determined, and are captured in total volumes for Point Loma WWTP. The volume of treated recycled water from SBWRP were reported in the City of San Diego’s 2025 Draft UWMP and reported here to show water quality and outcomes. The Point Loma WWTP effluent discharge that is not permitted recycled water use from OWD’s service area was estimated as the volume of water from the District’s service area entering the Metro system, reported as total volume of water treated at Point Loma WWTP, less the volume of recycled water from SBWRP delivered to the District. Otay Water District 2025 Urban Water Management Plan June 2026 Chapter 6: Water Supply Characterization 6-6 6.1.3.3 Recycled Water System Description The RWCWRF has a treatment capacity of 1.3 mgd and can reliably produce approximately 1,100 AFY of recycled water meeting Title 22 standards. Recycled water from the plant is pumped to lined and covered reservoirs in the District’s property located north of Proctor Valley Road adjacent to the Rolling Hills Ranch Development project. The District operates and maintains over 93 miles of recycled water transmission and distribution pipelines, pump stations and reservoirs, making it one of the largest recycled water systems in San Diego County. The District’s mandatory reuse ordinance, land development conditions, and public outreach have resulted in a stakeholder acceptance of recycled water as a viable local water supply for irrigation. The District continues to successfully serve recycled water to customers within its central service area, south of the Sweetwater Reservoir and west of the Otay Lakes Reservoirs. Most of the area represents the Otay Ranch General Development Plan area within the City of Chula Vista. To serve the District’s existing demand for recycled water, which exceeds the capacity of the RWCWRF, the District also purchases recycled water from the City of San Diego’s SBWRP. The SBWRP has a rated capacity of 15 mgd and is located at Monument and Dairy Mart Roads near the international border, adjacent to the Tijuana River. The SBWRP receives wastewater flow from the Grove Avenue Pump Station that scalps flow from the existing interceptor system that conveys flow northward to the Point Loma Treatment Plant for treatment and ocean outfall disposal. The existing interceptor system flows are thereby reduced, freeing up additional capacity for future growth in the South Bay region. The SBWRP is designed for a relatively constant flow rate depending upon recycled water demands and interceptor capacity limitations. The original agreement between the District and the City of San Diego for purchase of recycled water from the SBWRP was finalized on October 20, 2003. The 2003 agreement was superseded by an updated Recycled Water Agreement effective January 1, 2026, to December 31, 2030. In accordance with the updated agreement, the City of San Diego will continue to supply the District with up to 6 mgd (6,720 AFY) of recycled water. The District may request that the City of San Diego provide additional flows over 6 mgd, although the City of San Diego is not obligated to provide flows more than 6 mgd. The updated agreement with the City of San Diego for water from the SBWRP is included in Appendix E. The City of San Diego is responsible for treatment of the recycled water produced at the SBWRP to the point of delivery to the District. The point of delivery is located at the intersection of Dairy Mart Road and Camino de la Plaza. As part of the agreement, the District has constructed a 30-inch transmission main to deliver the recycled water from the point of delivery to the District. The City of San Diego retains 1 mgd of capacity in this transmission pipeline that runs through the City of San Diego’s system. 6.1.3.4 Recycled Water Beneficial Uses The District currently serves recycled water to approximately 1,000 customers. In 2025, approximately 5,170 AF of recycled water was supplied to recycled water users. Current uses consist primarily of landscape irrigation of commercial and public places, including parks, streetscapes, schools, highway medians, and open space areas. Some recycled water is used to irrigate golf courses. The District has a non-potable water billing rate under a distinct “cr” account type that golf courses may use; however, not all golf courses bill at this rate and some golf course irrigation with recycled water is billed under categories for general commercial irrigation with recycled water. Table 6-4 shows the recycled water use by traceable (i.e., “cr” customer billing type) golf course meters for the past 5 years. Golf course irrigation was projected to remain constant at the recent five-year average of 364 AFY through the UWMP planning horizon. Using a historic average allows for a range of hydrologic and water conservation conditions to be reflected in expected Otay Water District 2025 Urban Water Management Plan June 2026 Chapter 6: Water Supply Characterization 6-7 annual use. The static annual use over the planning horizon reflects the expectation that new customers are not expected to be added to the non-potable water billing rate for golf course irrigation. Recycled water is also used for construction activities. For the purposes of this UWMP, it was assumed that recycled water use for construction would remain steady over the UWMP planning horizon at the 2025 level. The remainder of the beneficial use of recycled water within the District’s service area is attributed to landscape irrigation at commercial or residential locations. Areas within the drainage basins of Sweetwater and Lower Otay reservoirs are not allowed to use recycled water. In addition, in July 2014, the District (Otay Water District 2014) approved a temporary moratorium on the installation of new recycled water facilities within its Otay Mesa service area, including a moratorium on issuing permits for new recycled water meters and on advancing recycled water projects requiring the installation of new recycled water infrastructure. No expiration date has been scheduled for the temporary moratorium. Thus, recycled water use in the future would be limited to growth in the central portion of the District’s service area that is not within the drainage basins. Several new, planned developments intend to use recycled water for irrigation. An estimated 24,510 gallons per day (GPD), or about 27.5 AFY of recycled water is intended to be used for irrigation of manufactured slopes and common areas at the Sunbow II Phase 3 project. The average annual recycled water demand for Village 3 is projected to be 48,070 GPD, or 53.8 AFY. The Otay Ranch Town Center Redevelopment is expected to have a recycled water demand of 13,000 GPD or about 14.9 AFY to irrigate common landscaped areas of the mixed-use sites, park, and community spaces. The Village 8 East development will use an estimated 202,160 GPD, or 226.5 AFY, recycled water to meet irrigation demands of open space slopes, parks, parkways and median landscaping within major roadways, and common areas of schools, commercial, and multi-family sites. Recycled water will be used for the irrigation of homeowners’ association slopes in the western portion of the Rancho del Otay development; however, an annual amount has not yet been quantified by the developer. In addition, the District anticipates recycled water use will increase slightly in response to AB 1572, which bans the use of potable water to irrigate turf grass that is not functionally used for recreational and community purposes. AB 1572 (Water Code Section 10608.14) prohibits the use of potable water to irrigate nonfunctional turf in most government, commercial, industrial, institutional, homeowners’ association common areas, and community service organization properties, beginning in 2027, and phasing in over three years. Residential customers may continue to use potable water for turf irrigation. Many of these customer types already use recycled water for landscape irrigation within the District’s central system, but limited growth in recycled water for landscape irrigation may still occur. Projected recycled water demands in the District’s central system area were estimated using methods similar to the demand projections for potable water described in Chapter 4. Recycled water use factors by customer sector were calculated using actual recycled water demand in 2025 and SANDAG estimates of the number of jobs and households for 2025. Commercial recycled water use factors for landscaping were calculated based on the SANDAG estimate of total jobs in 2025, while recycled water use factors for other irrigation demands were calculated using the SANDAG estimate of the numbers of households. To forecast recycled water demands, the factors were then applied to the expected growth in landscape irrigation due to employment and household projected growth for 2030-2050. Recycled water use at the planned developments was assumed to be captured in this projection. These projections are summarized in Table 6-5. RWCWRF’s can reliably produce approximately 1,100 AFY and the District’s SBWRP entitlement is 6,720 AFY. Therefore, recycled water supplies could reach a total of 7,820 AFY. The District does not anticipate a Otay Water District 2025 Urban Water Management Plan June 2026 Chapter 6: Water Supply Characterization 6-8 limitation on recycled water supplies to meet demands in the UWMP planning horizon. Table 6-6 compares 2025 recycled water use as projected in the 2020 UWMP to actual recycled water use in 2025. TABLE 6-4: GOLF COURSE IRRIGATION WITH RECYCLED WATER (AFY) (FISCAL YEARS 2020-2025) Use Type 2020 2021 2022 2023 2024 2025 Average Golf course irrigation 344 395 395 334 328 391 364 TABLE 6-5: CURRENT AND PROJECTED RECYCLED WATER DIRECT BENEFICIAL USES WITHIN SERVICE AREA 2025-2050 DWR Submittal Table 6-4 Retail: Recycled Water Direct Beneficial Uses Within Service Area Water Code Section 10633(c)(e) Use Type 2025 2030 2035 2040 2045 2050 Landscape irrigation (excluding golf courses) 4,701 5,082 5,696 6,274 6,505 6,758 Other (construction) 78 78 78 78 78 78 Golf course irrigation 391 364 364 364 364 364 Total 5,170 5,524 6,138 6,716 6,947 7,200 Notes: Recycled water is used to irrigate landscapes in multiple sectors, as reflected in Table 4-4. Golf course irrigation was projected to remain constant at the recent five-year average of 364 AFY over the UWMP planning horizon. TABLE 6-6: RECYCLED WATER USE PROJECTION COMPARED TO 2025 ACTUAL DWR Submittal Table 6-5 Retail: 2020 UWMP Recycled Water Use Projection Compared to 2025 Actual Water Code Section 10633(e) Use Type 2020 Projection for 2025 2025 Actual Use Landscape irrigation (excluding golf courses) 4,300 4,701 Other (construction) -- 78 Golf course irrigation 200 391 Total 4,500 5,170 Notes: Recycled water is used to irrigate landscapes in multiple sectors, including commercial and construction, as reflected in Table 4-4. 6.1.3.5 Actions to Encourage and Optimize Future Recycled Water Use The District commenced its wastewater recycling efforts over 15 years ago. A major component of the commitment to recycle was to enact an ordinance that requires recycled water be used for all appropriate and approved non-potable uses. The requirement continues today, with all new applications for water service being reviewed for opportunities to use recycled water. The District’s Code of Ordinance Section 26 details the requirements for the use of recycled water whenever feasible. The District’s service area is still experiencing growth and development in the geographic area where recycled water is approved for use Otay Water District 2025 Urban Water Management Plan June 2026 Chapter 6: Water Supply Characterization 6-9 (i.e., in the central system area, outside the drainage basins of Sweetwater and Lower Otay reservoirs, and outside of the Otay Mesa system). The District anticipates maximizing the use of recycled water by continuing to require new developments to use recycled water, wherever feasible. Several new, planned developments have estimated the amount of recycled water that would be used for irrigation. The expected recycled water that would be used by these planned developments is summarized in Table 6-7 below. TABLE 6-7: METHODS TO ENCOURAGE FUTURE RECYCLED WATER USE DWR Submittal Table 6-6 Retail: Methods to Encourage Future Recycled Water Use Water Code Section 10633(f) Description Planned Implementation Year Expected Increase in Recycled Water Use (AFY) Continue to require new developments within the District to use recycled water, wherever feasible 2025-2050 326 Total 326 Notes: Recycled water volume derived from estimates provided for the following planned developments in Water Supply and Verification Reports, Sub-Area Master Plans, and other planning documents: Sunbow II Phase 3 Project (2020), Village 3 North (2022), Otay Ranch Town Center Redevelopment (2023), Rancho del Otay (2025), and Village 8 East (2025). 6.1.4 Future Water Projects In evaluating the availability of sufficient water supply, new development project proponents in the District who anticipate a water demand that exceeds what was planned for that area are required to acquire a water supply source and/or participate in the development of alternative water supply projects to offset the anticipated additional demand. These new water supply projects are related to regional diversification efforts and efforts to reduce reliance on imported supplies. They are in various states of the planning process and are intended to increase water supplies to serve new development project water supply needs. It is anticipated that future Water Management Plans prepared by the District, the Water Authority, and Metropolitan will include any increases in water demand associated with adopted changes in land use, as well as any new local water supply resources, and will provide the planning tools necessary to ensure a water supply plan to meet the needs of future planned development. As shown in this 2025 UWMP, the District does not currently anticipate needing to develop new supplies in order to meet its projected demands, based on the reliability and availability of potable water for purchase from the Water Authority and excess recycled water supplies. However, the District may in the future consider pursuing other supplies depending on changes in supply circumstances, District priorities, or other reasons. While the projects below have been considered by the District in the past, they are currently on hold with no immediate plans to continue development. However, should the District determine it would like to explore additional supply options in the future, these projects may be re-considered and development may continue. Because these projects are not currently moving forward, they have not been included in DWR Submittal Table 6-7. 6.1.4.1 Rosarito Desalination Plant The District has investigated the feasibility of purchasing water from a seawater desalination plant planned to be built in Rosarito Beach, Baja California, Mexico. To access this drought-proof supply, the District would need to develop appropriate infrastructure. In May 2017, the U.S. Department of State granted a presidential Otay Water District 2025 Urban Water Management Plan June 2026 Chapter 6: Water Supply Characterization 6-10 permit to allow the Otay Water District to build a potable water pipeline to cross the U.S.-Mexico border. The 2017 permit authorized the District to “construct, connect, operate, and maintain cross-border water pipeline facilities for the importation of desalinated seawater at the International Boundary between the United States and Mexico in San Diego County, California.” The District undertook environmental review under the California Environmental Quality Act (CEQA) and the National Environmental Policy Act (NEPA) and obtained a biological permit from the U.S. Fish and Wildlife Service for this project. Given long delays and wavering political support, the project was assumed to be non-feasible, progress halted, and the authorizing permit expired. New negotiations would be required to determine whether this project could still proceed. If it does move forward, the District would also need to secure a permit from the State Water Resources Control Board’s Division of Drinking Water to ensure that water produced by the Rosarito plant meets California’s drinking water quality standards. The proposed Rosarito plant has been delayed for several years, but the Mexican government has confirmed that construction of the plant is set to begin in early 2026 (Bnamericas 2026). Any water supply available from this project that could be purchased by the District in the future is uncertain. 6.1.4.2 Groundwater Supply Development The District has explored several groundwater extraction opportunities, but as noted above, are not currently moving forward with implementation at this time. While the District overlies groundwater resources (brackish and non-brackish), the economic viability, well siting feasibility, permitting, and groundwater rights agreements remain uncertain and would require further exploration prior to determining whether to move forward with groundwater supply development. Several well projects have been explored and could be further developed in the future should groundwater supplies become more attractive to the District. These previously explored options are described here. Rancho del Rey Groundwater Well The Rancho Del Rey Groundwater Well site is located within the Lower Sweetwater Hydrologic Area (HA 909.10) and develops supply from what is believed to be the eastern edge of the San Diego Formation. The well was originally drilled by the McMillin Development Company in 1991 and produced approximately 400 AFY of poor-quality groundwater for temporary construction use before being taken out of service in 1995. In 1997, the District purchased the well intending to use it as a potable water supply, but it would require intensive treatment to remove salts and boron. The District plans to develop a groundwater well production facility to extract approximately 500 AFY. The District drilled an additional production well in the area in 2010. When compared with current rates for treated water from the Water Authority, and with the knowledge that this rate will continue to increase as Metropolitan and the Water Authority raise their rates, economic viability would need to be considered even with the costs of constructing treatment facilities. The District contracted for the design of the wellhead treatment facilities and has prepared the project environmental analysis. Middle Sweetwater River Basin Groundwater Well Project The Middle Sweetwater River Basin Groundwater Well is an additional water supply project that was thoroughly studied and documented in the 1990s. The Middle Sweetwater River Basin is located within the Sweetwater River watershed and that reach of the river extends from Sweetwater Reservoir to the upstream Loveland Reservoir. The next step in development is the implementation of a pilot well project. The ultimate objective of the District is to develop a groundwater well production system within the Middle Sweetwater River Basin capable of producing a sustainable yield of potable water as a local supply. The project is based on a conjunctive use concept, whereby groundwater is extracted in amounts corresponding to imported Otay Water District 2025 Urban Water Management Plan June 2026 Chapter 6: Water Supply Characterization 6-11 treated water previously returned to the basin by customers in the region. In the past, this return flow has been approximately 12.5 percent of total customer consumption, which is roughly 1,000 AFY under current conditions. Otay Mesa Lot 7 Groundwater Well In early 2001 the District was approached by a landowner representative about possible interest in purchasing an existing well or alternatively, acquiring groundwater supplied from the well located on Otay Mesa. The then-landowner, National Enterprises, Inc., reportedly stated that the well could produce 3,200 AFY with little or no treatment required prior to introducing the water into the District potable water system or alternatively, the recycled water system. The District may continue to pursue the Otay Mesa groundwater well opportunity with due consideration of the recommendations of the existing report. Based on the recommendations of the investigation report, a groundwater well production facility at Otay Mesa Lot 7 could realistically extract approximately 400 AFY. 6.1.4.3 North District Recycled Water Concept Project Although the District does not currently anticipate the need to develop additional recycled water supplies, and constraints on where recycled water may be used within the District’s service area limit expansion opportunities, the District has previously explored providing recycled water to the North System. Under this project, the District would serve up to 1.3 mgd of recycled water demands in the North System via the RWCWRF, equivalent to 1,620 AFY. Effluent from the RWCWRF is currently pumped by the District to irrigate golf courses, parks, and open space in Eastern Chula Vista, which is in the Central Area System and at a higher elevation than the North System. This project would reduce the conveyance costs that are currently incurred in pumping recycled water from the RWCWRF to Eastern Chula Vista. Existing recycled water users in Chula Vista would have to be provided with an alternate supply. Infrastructure required for this project includes conveyance to the North System as well as retrofits to the RWCWRF chlorine contact basin, effluent pump station, and data collection and logging systems, per the North District Recycled Water System Phase I Concept Study. This project would require inter-agency coordination with the Regional Water Quality Control Board, Sweetwater Authority, and the City of Chula Vista. 6.2 Summary of Existing and Planned Sources of Water The District’s total current and planned supplies are shown in Table 6-8 and Table 6-9. Actual 2025 supplies are based on Water Authority sales and recycled water sales. Projected supplies are based on growth projections (with near-term annexations and planned developments) in the District’s service area. Otay Water District 2025 Urban Water Management Plan June 2026 Chapter 6: Water Supply Characterization 6-12 TABLE 6-8: WATER SUPPLIES - 2025 ACTUAL DWR Submittal Table 6-8 Retail: Water Supplies — 2025 Actual Water Code Section 10631 (b) Water Supply 2025 Water Type Actual Volume (AF) Total Entitlement Purchased or Imported Water Potable 30,000 30,000 Recycled Water Non-Potable 5,170 7,820 Subtotal Potable 30,000 30,000 Subtotal Non-Potable 5,170 7,820 Total 35,170 37,820 Notes: Recycled water is sourced from Ralph W. Chapman Water Recycling Facility (RWCWRF) and the City of San Diego’s South Bay Water Reclamation Plant (SBWRP). Otay Water District 2025 Urban Water Management Plan June 2026 Chapter 6: Water Supply Characterization 6-13 TABLE 6-9: WATER SUPPLIES - PROJECTED DWR Submittal Table 6-9 Retail: Water Supplies — Projected Water Code Section 10631 (b) Water Supply Water Type Projected Water Supply (AF) 2030 2035 2040 2045 2050 Reasonably Available Volume Total Entitlement Reasonably Available Volume Total Entitlement Reasonably Available Volume Total Entitlement Reasonably Available Volume Total Entitlement Reasonably Available Volume Total Entitlement Purchased or Imported Water Potable 34,960 34,960 38,597 38,597 43,293 43,293 45,416 45,416 47,634 47,634 Recycled Water Non-Potable 5,524 7,820 6,138 7,820 6,716 7,820 6,947 7,820 7,200 7,820 Purchased or Imported Water (City of San Diego Otay WTP: Backup potable supply) Potable - 10,000 - 10,000 - 10,000 - 10,000 - 10,000 Subtotal Potable 34,960 44,960 38,597 48,597 43,293 53,293 45,416 55,416 47,634 57,634 Subtotal Non-Potable 5,524 7,820 6,138 7,820 6,716 7,820 6,947 7,820 7,200 7,820 Total 40,484 52,780 44,735 56,417 50,009 61,113 52,363 63,236 54,834 65,454 Notes: The District is authorized to purchase up to 10 million gallons per day (mgd) of supply from the City of San Diego Otay WTP. The District considers the supply of water from the Otay WTP to be an alternative source for use when the Water Authority Pipeline No. 4 is out of service. The District’s expected recycled water supply is 7,820 AFY; if needed, additional recycled water could be supplied by the City of San Diego. Otay Water District 2025 Urban Water Management Plan June 2026 Chapter 6: Water Supply Characterization 6-14 6.3 Climate Change Impacts to Supply The actual impacts of climate change on future water supply are unknown, but it can be reasonably assumed that average temperatures will increase, and precipitation patterns will change. The District’s potable water supplies are almost entirely dependent on water purchased from the Water Authority, which consists of approximately 60% imported supplies. These imported supplies are sourced from the State Water Project (SWP) and the Colorado River, which are both vulnerable to climate change impacts (Section 3.5). The reliability of these imported supplies will be impacted in the following ways: • Unpredictable weather patterns, which may result in recurring droughts or extreme weather events damaging water conveyance infrastructure. • Salinity intrusion in the Sacramento-San Joaquin Delta due to sea-level rise, which may result in increased total dissolved solids concentrations in SWP supplies. • Reducing Sierra Nevada snowpack and snowmelt, affecting a crucial supply source for the SWP. • Increasing the frequency and severity of wildfires, which may lead to water quality issues. A portion of the Water Authority’s supplies is derived from surface water runoff into its reservoirs. The availability of these surface water supplies is also vulnerable to climate change impacts, such as recurring droughts and water quality impacts due to wildfire. These factors may influence supply reliability for the District, which is discussed further in Chapter 7. A summary of climate change impacts to water demand and supply for Water Authority member agencies is included in the Water Authority’s 2025 UWMP (San Diego County Water Authority 2025). 6.4 Energy Use The Water Code (Section 10631.2(a)) requires suppliers to provide any readily available information on the amount of energy used or generated for water management processes (e.g., treating or distributing water supplies), within their operational control. The energy intensity associated with water treatment and conveyance in the District varies by water type and origin. Potable water treatment is not conducted by the District, so any energy use associated with drinking water is related to distribution within the District. The District treats wastewater generated in its service area at the RWCWRF. The majority of wastewater treated at RWCWRF is treated to tertiary recycled water standards for beneficial use within the District, while some is conveyed via the City of San Diego’s Metropolitan Wastewater System to Point Loma Wastewater Treatment Plant for primary treatment and ocean discharge, as described in Section 6.1.5. The energy demands associated with tertiary recycled water treatment are higher than those of secondary or primary treatment, but all flows require energy for distribution and conveyance, either within the District or the City of San Diego’s Metropolitan Wastewater System. According to invoices from San Diego Gas and Electric, 9,021,576 kWh of electricity and 31,152 Therms of natural gas were consumed between July 2024 and June 2025 on the potable water distribution facilities within the District’s operational control. Over the same time, 2,923,431 kWh and 27,386 Therms were consumed on the recycled water distribution facilities within the District’s operational control, and 916,3581 kWh were consumed on sewer lift stations and treatment facilities. For a comprehensive overview of the District’s energy use and related initiatives, consult the Climate Action and Resiliency Plan expected to be completed around February 2027. Otay Water District 2025 Urban Water Management Plan June 2026 Chapter 7: Water Service Reliability & Drought Risk Assessment 7-1 7. WATER SERVICE RELIABILITY AND DROUGHT RISK ASSESSMENT The UWMP Act requires every UWMP to include an assessment of water supply reliability. The assessment must compare total projected water supply and demands over at least the next 20 years in five-year increments under normal, single dry and multiple dry year conditions. For the 2025 UWMP, the District’s assessment evaluates reliability over the next 25 years. Projections were prepared for normal and single dry years, as well as for five time-frames: five-year periods ending in 2030, 2035, 2040, 2045 and 2050. In addition, the Water Code Section 10635(b) requires a water supplier to include a drought risk assessment (DRA) in its 2025 UWMP. The DRA must be conducted for a drought period of five years and include a description of the data, methodology, and basis for the shortage conditions. 7.1 Reliability of Supply The District currently obtains 100 percent of its potable water supply from the Water Authority, which historically relied on imported water purchased from Metropolitan to meet the needs of its member agencies. However, after experiencing severe shortages from Metropolitan during the 1987–1992 drought, the Water Authority began aggressively diversifying its supplies to improve the region’s supply reliability through comprehensive supply and facility planning. While the District’s supply reliability is dependent on the actions of these wholesale agencies, it is also committed to investing in alternative water sources to reduce its reliance on imported water. Metropolitan and the Water Authority both included detailed assessments of supply reliability in their 2025 UWMPs. Metropolitan modeled 99 years of historic hydrology to develop estimates of water surplus or shortage. From 1922 through 2021, the driest year on record was 1977, and the driest five-year period was 1988-92. The analysis determined that Metropolitan could maintain reliable supplies during normal or dry-year conditions during the period 2025 through 2050, even through multiple dry year periods (Metropolitan 2026). In Metropolitan’s 2025 Drought Risk Analysis, it projects a shortfall of core supplies if a drought were to occur in the near future but anticipates being able to meet member agency demands with flexible and stored supply sources, in addition to implementing demand management measures. The Water Authority’s reliability assessment demonstrates that the region’s existing and projected supply portfolio is drought resilient (see Appendix F). The District continues to work closely with the Water Authority and Metropolitan for future water supply planning. While individual components of the supply, such as the Colorado River and State Water Project, may experience dry years or extended droughts, the diversified supply portfolio improvements put in place by Metropolitan and the Water Authority will allow them to meet the demands of their respective member agencies, including the District, for the next 25 years. Demands for non-potable water are met with recycled water from the District’s RWCWRF and the City of San Diego’s SBWRP. The RWCWRF has a treatment capacity of 1.3 mgd and can reliably produce approximately 1,100 AFY of recycled water to serve the District. The remainder of the District’s recycled water demand, which exceeds the treatment capacity of the RWCWRF, is supplied by the City of San Diego’s SBWRP. The SBWRP has a treatment capacity of 15 mgd and supplies the District with up to 6 mgd (6,720 AFY) of recycled water. The District may request that the City of San Diego provide additional flows over 6 mgd, if needed and if available. The District’s supply of recycled water is not expected to be subject to reductions during dry periods. Otay Water District 2025 Urban Water Management Plan June 2026 Chapter 7: Water Service Reliability & Drought Risk Assessment 7-2 Throughout this section, projected supplies are shown to meet projected demands. This level of reliability is based on the documentation in the UWMP prepared by the Water Authority, as documented in Appendix F. The Water Authority has determined that it will have a surplus of potable supplies during normal, single dry and multiple dry year conditions through 2050, as shown in Tables 9-1 through 9-7 of the Water Authority’s 2025 UWMP. Thus, although the District’s forecasted water demands in its 2025 UWMP may differ and even be higher than the forecasted District demands presented in the Water Authority’s 2025 UWMP, the Water Authority’s anticipated supplies would meet the District’s potable water needs. For an explanation on the differences between the Water Authority and District water demand forecasts in their respective 2025 UWMPs, see Section 4.3.3. Because the Water Authority has determined that it will be able to meet its member agencies’ potable demands and have a surplus in supplies during all year types, the District’s analysis assumes potable supplies will meet demands under all hydrologic conditions. Investigations into water supply projects outside of the Water Authority’s regional resource mix will be analyzed if conditions change. The base years used in Metropolitan and the Water Authority’s UWMPs are summarized in Table 7-1. Note that there is a difference in base years used for modeling purposes between a single-dry year and the first year of a multi-dry year scenario. As a result, the forecasted demands and supplies in a single-dry year are not the same as the forecasted demands and supplies in the first year of a multi-dry year scenario. TABLE 7-1: BASIS OF WATER YEAR DATA (WATER SERVICE RELIABILITY ASSESSMENT) DWR Submittal Table 7-1 Retail: Basis of Water Year Data (Reliability Assessment) Year Type Base Year Available Supplies if Year Type Repeats Volume Available (AF) % Average Supply Average Year 1991- 2020 48,485 100% Single-Dry Year 2013, 2018, and 2021 51,523 106% Consecutive Dry Years 1st Year 2011 51,690 107% Consecutive Dry Years 2nd Year 2012 52,186 108% Consecutive Dry Years 3rd Year 2013 52,682 109% Consecutive Dry Years 4th Year 2014 53,184 110% Consecutive Dry Years 5th Year 2015 53,694 111% Notes: Volume available reflects the average volume expected to be available under the hydrologic conditions for the given scenario, based on the analysis of projected supply availability from Water Authority and District supply mix. Volume available includes both potable and non-potable. The Water Authority's supply reliability analysis shows sufficient supplies to meet demands in all future scenarios. Otay Water District 2025 Urban Water Management Plan June 2026 Chapter 7: Water Service Reliability & Drought Risk Assessment 7-3 7.2 Projected Normal Water Year Assessment The District’s potable water demands are expected to be met by Water Authority supplies during normal water years. The projected supply and demand comparison under normal water year conditions is shown in Table 7-2. TABLE 7-2: NORMAL YEAR SUPPLY AND DEMAND COMPARISON DWR Submittal Table 7-2 Retail: Normal Year Supply and Use Comparison Water Code Section 10635 (a) 2030 2035 2040 2045 2050 Supply totals 40,484 44,735 50,009 52,363 54,834 Use totals 40,484 44,735 50,009 52,363 54,834 Difference 0 0 0 0 0 Notes: Volume includes both potable and non-potable. Water Authority UWMP analysis shows 100 percent supply reliability for these conditions; total supplies are, therefore, set equal to District projected demands. 7.3 Projected Single Dry Year Assessment Table 7-3 shows the District’s single dry-year assessment through 2050. The District’s potable water demands are expected to be met by Water Authority supplies during a single dry year scenario. For single dry-year conditions, the Water Authority’s analysis assumes local supplies based on the average of actual production during the drought years 2013, 2018, and 2021, combined with projected future supply projects. The supplies available from Water Authority member agency projected surface water, recycling, potable reuse, seawater desalination, brackish groundwater recovery, groundwater, and transfers are assumed to experience little, if any, reduction in a single dry year. The Water Authority’s existing and planned supplies from seawater desalination, Imperial Irrigation District transfer, and canal lining projects are considered drought resilient. For the single dry-year assessment, it was conservatively assumed that Metropolitan would allocate limited supplies to its member agencies. Recycled water supply is also expected to increase in five-year increments as demand for recycled water increases relative to increasing irrigation demand. The District’s recycled water is assumed to be “drought-resistant” and not subject to reduction during dry periods. The dry-year demand analysis from the Water Authority reflects long-term water use efficiency but does not incorporate potential savings due to extraordinary conservation occurring during droughts. This approach allows for a more comprehensive shortage analysis and drought response planning. Based on the information provided by the Water Authority, no shortages are anticipated in the Water Authority’s service area under a projected single dry year. The projected single dry year supplies and demands are compared in Table 7-3. Otay Water District 2025 Urban Water Management Plan June 2026 Chapter 7: Water Service Reliability & Drought Risk Assessment 7-4 TABLE 7-3: SINGLE DRY YEAR SUPPLY AND DEMAND COMPARISON DWR Submittal Table 7-3 Retail: Single Dry Year Supply and Use Comparison Water Code Section 10635(a) 2030 2035 2040 2045 2050 Supply totals 43,021 47,538 53,143 55,644 58,270 Use totals 43,021 47,538 53,143 55,644 58,270 Difference 0 0 0 0 0 NOTES: Volume includes both potable and non-potable. Water Authority UWMP analysis shows 100 percent supply reliability for these conditions; total supplies are, therefore, set equal to District projected demands. 7.4 Projected Multiple Dry Year Supply and Demand Comparison Under the multiple dry-year scenario, the Water Authority’s existing and planned supplies from seawater desalination and San Luis Rey water transfer supplies are based on contractual levels and the supplies available from Water Authority member agency projected recycling, potable reuse, and groundwater recovery projects are based on member agency projected growth in these verifiable supplies. Additionally, it was conservatively assumed by the Water Authority that Metropolitan would allocate supplies to its member agencies, including the Water Authority. Currently, Metropolitan allocates supplies through its Water Supply Allocation Plan. Because it is uncertain in the future how Metropolitan will allocate supplies to its member agencies, the analysis in the tables assumes they are allocated based on preferential right to Metropolitan supplies. By assuming these allocations in its reliability assessment, the Water Authority evaluates if draws from regional storage supplies are required and whether there may be any shortages. The Water Authority has invested in carryover storage supply capacity, which it can utilize in dry years to improve reliability of supply. In years where shortages may still occur, after utilization of carryover storage, additional regional shortage management measures, consistent with the Water Authority’s Water Shortage Contingency Plan, will be taken to fill the supply shortfall. These measures could include extraordinary conservation, achieved through voluntary or mandatory water-use restrictions. The District will also implement additional water conservation measures, as determined in its Water Shortage Contingency Plan, discussed further in Chapter 8 and included in Appendix G. The 2025 UWMP assumes potable supplies will increase and be sufficient to meet demand under these multiple dry-year hydrologic conditions and extend over the planning horizon, as shown below in Table 7-4. Otay Water District 2025 Urban Water Management Plan June 2026 Chapter 7: Water Service Reliability & Drought Risk Assessment 7-5 TABLE 7-4: MULTIPLE DRY YEARS SUPPLY AND DEMAND COMPARISON DWR Submittal Table 7-4 Retail: Multiple Dry Years Supply and Use Comparison Water Code Section 10635(a) 2030 2035 2040 2045 2050 First year Supply totals 43,160 47,692 53,315 55,824 58,459 Demand totals 43,160 47,692 53,315 55,824 58,459 Surplus/(Shortage) 0 0 0 0 0 Second year Supply totals 43,575 48,150 53,827 56,360 59,020 Demand totals 43,575 48,150 53,827 56,360 59,020 Surplus/(Shortage) 0 0 0 0 0 Third year Supply totals 43,988 48,607 54,338 56,895 59,580 Demand totals 43,988 48,607 54,338 56,895 59,580 Surplus/(Shortage) 0 0 0 0 0 Fourth Year Supply totals 44,407 49,070 54,855 57,437 60,148 Demand totals 44,407 49,070 54,855 57,437 60,148 Surplus/(Shortage) 0 0 0 0 0 Fifth Year Supply totals 44,833 49,541 55,382 57,989 60,725 Demand totals 44,833 49,541 55,382 57,989 60,725 Surplus/(Shortage) 0 0 0 0 0 Notes: Volume includes both potable and non-potable. Under the third, fourth, and fifth year of the Multiple Dry Year scenario, recycled water demands exceed non-potable supply capacity in 2050. For those years, recycled water demand is supplemented with additional purchases of potable water from the Water Authority, which has sufficient supplies to meet these demands. Water Authority UWMP analysis shows 100 percent supply reliability for these conditions; total supplies, therefore, are set equal to District projected demands. 7.5 Drought Risk Assessment The District’s Drought Risk Assessment (DRA) reflects the DRA prepared by the Water Authority. The Water Authority’s DRA assesses a projected drought over the next five-year period from 2026 - 2030. The historical period used in the analysis to represent the Water Authority’s driest consecutive five-year period are years 2014 - 2018. Those years represent the five-year period with the lowest local water supply production from surface water and groundwater, the two local water supplies that are most susceptible to variation due to weather. The District does not use its own supply of local surface water or groundwater. The Water Authority showed no reduction in availability of potable supplies over the five-year period for regional supplies, imported supplies, and Metropolitan supplies. The District’s supply of recycled water is not expected to have a reduction in availability during the five-year period. The projected demands for the five-year dry period were estimated by starting with 2025 demands and escalating them using the percentages shown in Table 7-5. This table is based on Table 9-8 in the Water Authority’s 2025 UWMP. The multipliers were based on a weather index developed to assess the impact of dry/hot weather on water demands. The dry/hot index was derived by combining historical observations on average maximum daily temperature and precipitation into a single indicator where higher values represent Otay Water District 2025 Urban Water Management Plan June 2026 Chapter 7: Water Service Reliability & Drought Risk Assessment 7-6 hotter-drier conditions. Specifically, the index was constructed from weather parameters of the water demand forecasting models and used to determine the multipliers for consecutive dry/hot weather. The anticipated supplies and demands are shown in Table 7-5.. Based on the analysis, without needing actions under the WSCP, the District is not expected to have a shortage in the five-year period. TABLE 7-5: FIVE-YEAR DROUGHT RISK ASSESSMENT TABLES TO ADDRESS DWR Submittal Table 7-5 Retail: Five-Year Drought Risk Assessment Water Code Section 10635(b)(3) 2026 Total Demand projection multiplier 109% Total Water Use 38,335 Total Supplies 38,335 Surplus/Shortfall w/o WSCP Action 0 2027 Total Demand projection multiplier 109% Total Water Use 38,335 Total Supplies 38,335 Surplus/Shortfall w/o WSCP Action 0 2028 Total Demand projection multiplier 111% Total Water Use 39,039 Total Supplies 39,039 Surplus/Shortfall w/o WSCP Action 0 2029 Total Demand projection multiplier 114% Total Water Use 40,094 Total Supplies 40,094 Surplus/Shortfall w/o WSCP Action 0 2030 Total Demand projection multiplier 116% Total Water Use 40,797 Total Supplies 40,797 Surplus/Shortfall w/o WSCP Action 0 Otay Water District 2025 Urban Water Management Plan June 2026 Chapter 8: Water Shortage Contingency Plan 8-1 8. WATER SHORTAGE CONTINGENCY PLAN The District prepared a separate stand-alone Water Shortage Contingency Plan (WSCP) which is included in this document as Appendix G. The WSCP was first prepared and adopted by the District in June 2021. The District has made minor revisions and clarifications to the WSCP in 2026 to align the WSCP tables with the 2025 UWMP Guidebook. The WSCP will be adopted by the District Board of Directors on June 3, 2026 along with the 2025 UWMP. This section contains a summary of the WSCP. 8.1 Purpose of the WSCP The District developed a WSCP to provide guidance if triggering events occur such as reduced supply, increased demand, or an emergency declaration. The WSCP identifies the actions to be taken during various stages of a water shortage. The plan includes voluntary and mandatory stages which are intended to be fair to all water customers and users while having the least impact on business, employment, and quality of life for residents in the District’s service area. 8.2 Annual Water Supply and Demand Assessment Procedures The Water Code Section 10632.1 requires that an urban water supplier, such as the District, conduct an annual water supply and demand assessment on or before July 1 of each year, to be submitted to DWR. The annual assessments provide an analysis of the likelihood of a water shortage occurring during the next 12 months. Section 2 of the District’s WSCP identifies the timeline, staff and outside agency coordination, and other actions necessary to conduct the Annual Assessment. 8.3 Water Shortage Stages and Shortage Response Actions The WSCP describes six water shortage stages corresponding to progressive ranges of up to 10, 20, 30, 40, and 50 percent water shortages and greater than 50 percent water shortage. 8.4 Water Shortage Response Actions The following water shortage response actions are identified in the WSCP: • Supply augmentation • Operational changes • Customer demand reduction measures and mandatory use restrictions. The WSCP also describes communication protocols that would be followed in each water shortage stage. Otay Water District 2025 Urban Water Management Plan June 2026 Chapter 9: Demand Management Measures 9-1 9. DEMAND MANAGEMENT MEASURES Demand management is central to the District’s 2025 UWMP and long-term water planning. By promoting efficient water use, the District aims to cut reliance on expensive imported supplies and maintain a reliable water source, as well as meet State water conservation regulations. The District’s commitment to encouraging water conservation in its service area contributed to it achieving the SB X7-7 per-capita water use target. As explained in Section 5, the District’s calculated per-capita demand target for 2020 was 153 GPCD and its actual GPCD in 2020 was 108. On-going demand management measures have helped the District maintain its low GPCD, which was 112 in 2025, below its 2020 target. The San Diego region, including the District, continues to reflect the long-term changes in water conservation that emerged from California’s historic 2014-2018 drought. That period of unprecedented emergency regulations and mandatory statewide water restrictions led to a dramatic reduction in demand and the water-saving behaviors established during the drought have largely persisted. California has shifted from temporary drought response toward permanent, proactive, water-use efficiency. In line with the state’s “Making Conservation a California Way of Life” initiative, the State Water Resources Control Board adopted new long-term water use efficiency objectives in July 2024. Developed under SB 606 and Assembly Bill 1668, each urban retail water supplier is required to meet customized water use objectives for indoor and outdoor residential water use, system water loss, and commercial irrigation. Implementation of these standards is underway, with enforcement beginning in 2027. According to the latest Urban Water Use Objective and Water Use Report the District’s total actual water use for the period July 2023 – June 2024 was 21,340 AF, which was below its calculated Urban Water Use Objective for the same period of 30,628 AF, demonstrating that the District is currently operating within, and exceeding, the State’s efficiency expectations. The District remains committed to aligning with these evolving regulations through ongoing investment in conservation programs, public education, and strategic planning efforts to sustainably manage demand and ensure long-term water supply reliability. The District continues to be a member of the California Water Efficiency Partnership (CWEP) as part of its ongoing efforts to continue upholding its long-term commitment in reducing the state’s water demands, diversifying local water supply, and encouraging its customers to make conservation a way of life. This also includes the District’s consistent advocacy for state policies and legislation that include supply development and water-use efficiency. The District has long been a leader in the field of water conservation. Since the early 1990’s, water conservation programs have been developed and conducted on the premise that water conservation increases the water supply by reducing the demand on available supply, which is vital to the optimal operation of the District. As a member agency of the Water Authority, the District participates in many of the water conservation programs designed and conducted as a shared-cost participation program among the member agencies, the Water Authority and Metropolitan. In addition, the District has developed and manages several of its own programs. The District’s water conservation programs and water efficiency practices are described below. 9.1 Participation in Regional Partnership Water Conservation Programs The District is committed to promoting water efficiency through participation in several key regional programs. Currently, these include the Water Authority’s Landscape Efficiency and Value Enhancement Solutions (LEAVES) Program for commercial properties, WaterSmart Landscape Makeover Program, and Agricultural Irrigation Assistance Programs. In addition, the District partners with the Metropolitan Water Otay Water District 2025 Urban Water Management Plan June 2026 Chapter 9: Demand Management Measures 9-2 District’s SoCal Water$mart Turf Replacement Program, providing rebates of $2.00 per square foot to eligible residents and businesses that replace traditional turf with water-efficient landscaping as well as $100 per tree installed for a maximum incentive for up to five trees (San Diego County Water Authority 2026). Other programs under SoCal Water$mart include the residential program which offers rebates for qualifying indoor and outdoor products such as high-efficiency clothes washers and toilets, weather-based irrigation controllers, sprinkler nozzles, rain barrels, flow monitoring devices, and more. The commercial, industrial, and institutional programs under SoCal Water$mart offer rebates for these customers to remove turf grass and replace it with water-efficient landscaping as well as offer free water use assessments for large commercial landscapes. Additional rebates are available for replacement of older, inefficient devices with water efficient devices both inside and outside commercial, industrial, and institutional buildings. The District also participates in the County of San Diego’s Waterscape Rebate Program, which focuses on the installation of landscaping and water-wise features and offers rebates to residents and businesses living in unincorporated areas of San Diego County. The District promotes the Water Savings Incentive Program (WSIP), which is funded by Metropolitan Water District of Southern California. The WSIP is a performance-based conservation program designed for non-residential customers whose customized water-saving projects fall outside the scope of standard rebates. WSIP provides financial incentives based on the measured volume of water saved, offering up to $0.60 per 1,000 gallons of water conserved over the life of the project, for a maximum of ten years, with total incentives limited to 50% of eligible project costs (SoCal Water$mart n.d.-a). The program is open to commercial, industrial, institutional, agricultural, and large landscape customers within Metropolitan’s service area and remains available on a first-come, first-served basis while funding lasts. Additional programs administered by Metropolitan and supported by the District include the On-Site Retrofit Program and the Innovative Conservation Program. The On-Site Retrofit Program provides a significant opportunity for commercial, industrial, institutional, and homeowner association properties to reduce potable water demands by converting existing irrigation or industrial systems to recycled water use. The program offers financial incentives of $195 per AF for ten years of estimated water use, up to the total actual retrofit cost, helping offset expenses related to project design, permitting, construction, connection fees, and required recycled water signage. Participation in this program supports long-term regional water-use efficiency and enhances local supply reliability by shifting non-potable demands from imported water to recycled water (SoCal Water$mart, n.d.-b). The Innovative Conservation Program, anticipated Spring 2027, which provides funding for research projects that evaluate the water-saving potential and performance of new and emerging water-efficient technologies and devices (Metropolitan Water District of Southern California n.d.). Through this program, Metropolitan supports innovation by testing practical solutions that can enhance long-term water conservation outcomes and strengthen the region’s portfolio of effective demand-management tools. 9.2 District-Developed Water Conservation and Water Efficiency Programs The District has implemented several District-specific programs and practices to promote water-use efficiencies and water conservation, as described below. 9.2.1 Water Waste Prevention Ordinance The District’s Code of Ordinances includes Section 39, Drought Response Conservation Program, which establishes water management requirements that, in addition to any permanent water waste prohibitions, Otay Water District 2025 Urban Water Management Plan June 2026 Chapter 9: Demand Management Measures 9-3 are necessary to conserve water, enable effective water supply planning, assure reasonable and beneficial use of water, prevent waste of water, and prevent unreasonable use of water within the District to assure adequate supplies of water. Furthermore, at all times, the following practices remain in effect in the District: • Prevent water waste resulting from inefficient irrigation, such as runoff or overspray. This includes topping water flows onto non-targeted areas such as adjacent property, sidewalks, driveways, roadways, or structures. • Restaurants and other food service establishments should continue to serve and refill water only upon request. • Hotels, motels, and other commercial lodging establishments must offer guests the option of not laundering towels and linens daily. • Fountains or other decorative water features must re-circulate water. • When washing automobiles, motorhomes, boats or recreational vehicles, a hose equipped with a positive shut-off nozzle is required. • Irrigating ornamental turf on public street medians can only be performed using recycled water. • Repair all water leaks within 48 hours of notification by the District. • Irrigation is not allowed during a rainstorm, or for 48 hours after one-quarter inch or more of rainfall is measured at Lindbergh Field. • No washing down of paved surfaces including sidewalks, driveways, parking lots, tennis courts, or patios, except when necessary to alleviate safety or sanitation hazards. During periods of shortages, other more stringent requirements to conserve water are required, as detailed in the Program. These requirements are also included in the District’s Water Shortage Contingency Plan which is attached as Appendix G. 9.2.2 Metering The Water Code requires customer connection metering. In addition, high-frequency water use measurements enable suppliers to more closely track water use, waste, and leaks at the customer connection on a timely basis (DWR 2025a). The District requires meters on all connections within its service area. An Automatic Meter Reading (AMR) Program was begun in 2005 and 86% of the meters in the District currently have AMR devices installed. The District’s AMR program is ongoing with upgrades of meters to newer technologies on a regular basis. Prior to beginning the changeover to AMI meters, 99% of all customer meters in the District had AMR. In Fiscal Year 2022, the District began a pilot study of advanced metering infrastructure (AMI) technology. To date, 13.5% of the meters in the District have AMI technology installed. The District plans to install approximately 512 additional AMI meters in Fiscal Year 2026 and eventually install AMI technology on 99.9% of all customer meters by 2032 through the District’s Meter Changeout Project. Otay Water District 2025 Urban Water Management Plan June 2026 Chapter 9: Demand Management Measures 9-4 9.2.3 Tiered Pricing The District uses a tiered rate structure for residential and multi-residential customers whereby the bill is based on a fixed monthly system fee, a fixed Water Authority/ Metropolitan pass-through fee, plus a tiered fee based on the amount of water used. For the District’s non-residential customers, a non-tiered rate structure is used whereby the bill is also based on a fixed monthly system, a fixed Water Authority/Metropolitan pass-through fee plus a non-tiered fee based on the amount of water used (Otay Water District n.d.-b). 9.2.4 Supervisory Control and Data Acquisition The District has implemented and operated a Supervisory Control and Data Acquisition (SCADA) system for many years. This system controls, monitors, and collects data regarding the operation of the water system. The major facilities that have SCADA capabilities are the flow control facilities supplying the system, transmission network, pumping stations, and water storage reservoirs. The SCADA system allows for many and varied useful functions. Examples of some of the functions it provides for operating personnel are the ability to monitor the water supply source flow rates, reservoir levels, and turn on or off pumping units. The SCADA system also aids in the prevention of water reservoir overflow events, helps detect distribution pipeline breaks and increases energy efficiency. 9.2.5 Water Loss Reductions The District has an ongoing leak detection program for its potable and recycled distribution system. The District contracts with a professional leak detection company that surveys approximately 20% of the District’s potable and recycled distribution system on an annual basis. This approach allows for the District’s entire distribution system to be surveyed at least once every 5 years. The leak detection companies chosen for the contract utilize the latest acoustic technology available to detect leaks. When leaks are found or suspected, District staff validates the location of the leak and completes any repairs within days of being notified. District staff regularly looks into new and upcoming leak detection technologies to determine if they would enhance the District’s current program. In addition, as mentioned in Section 9.2.2, the District’s AMI meter program allows it to detect leaks at the customer connection in a timely manner. 9.2.6 Public Education & Outreach The District promotes its conservation programs through outreach at community and business events, bill inserts, articles in its quarterly customer “Pipeline” newsletter, direct mailings to customers, and its website and its social media platforms. The District has had a school education program for many years and hosts an annual “Water is Life” student poster contest for students in grades K-12 within the District’s service area (Otay Water District n.d.-c). In addition, District staff have assembled a Water Conservation Education packet that is available to teachers within the District. In addition, the Hydro Station is a continuing education program that the District implements in partnership with the Chula Vista Elementary School District and Sweetwater Authority. The Hydro Station is held at Sweetwater Authority’s Richard A. Reynold Groundwater Desalination Facility, where fifth-grade students learn about the ecological cycle of water, water quality, and conservation. The program exposes students to careers in the water industry and helps encourage a new generation of water industry professionals. Otay Water District 2025 Urban Water Management Plan June 2026 Chapter 9: Demand Management Measures 9-5 In addition, through the San Diego County Office of Education, the District offers the Splash Science Labs program, which provides hands-on watershed education for students in grades 4–8. Through interactive stations, including microscopes, water chemistry experiments, and watershed modeling, students learn how water pollution affects the environment, wildlife, and human communities, and why water conservation is essential (Otay Water District n.d.-c). The District also partners with the Water Authority through its Shows That Teach Assemblies Program for students in grades K-6. The program, held in-person and virtually, addresses many educational standards of water science such as the water cycle and the journey of water. This engaging program also includes demonstrating why it is important to conserve water as well as how students can be “water smart.” The District participates in a Joint Powers Authority with the Helix Water District, Sweetwater Authority, and Grossmont-Cuyamaca Community College District to operate the nearly five-acre Water Conservation Demonstration Garden. The Garden’s mission is to, “promote water conservation in the southern California landscape through excellent exhibits and programs that educate and inspire the public (Water Conservation Garden Authority 2026).” The Garden educates customers about reducing landscape water use using water-efficient landscapes. The District also promotes additional water-use efficiency tools and programs including but not limited to the following: • Water-wise Landscape Contest for homeowners in the District’s service area. • Water Smart landscaping designs. • Metropolitan’s Water Calculator. • The U.S. Geological Survey’s Drip Calculator. • Commercial Landscape Irrigation Surveys. • EPA WaterSense. 9.2.7 Water Conservation Staffing Water Conservation is handled by two District staff that work in the District’s General Manager’s Office. These staff members are responsible for communications, public outreach, and water conservation. The staff participate in outreach events throughout the community and promote a variety of incentive and other programs available to District customers. Staff also promote water-use efficiency through educating the District’s customers about available rebates, water conservation programs, and the Water Conservation Garden. The office also works with other departments to coordinate the District’s Water Shortage Contingency Plan as well as its water waste reporting program. Otay Water District 2025 Urban Water Management Plan June 2026 References 10-1 10. PLAN ADOPTION, SUBMITTAL, AND IMPLEMENTATION This chapter describes and documents the steps taken to make the 2025 UWMP publicly available, as well as the steps taken to adopt and submit the UWMP in accordance with the Water Code. 10.1 Notice of Public Hearing As mentioned in Section 2 of this Plan, the District has coordinated the preparation of its plan with other appropriate agencies in the area, including other water suppliers, water management agencies, and public agencies (Table 2-4). In accordance with the Act, the District provided a 60-day notice to the Water Authority (its wholesale water supplier) and the San Diego Association of Governments, the City of San Diego, City of Chula Vista, City of El Cajon, County of San Diego, and San Diego LAFCO that they were reviewing and considering amendments or changes to the UWMP and that they would be holding a public hearing prior to the adoption of the UWMP. The District also provided a letter to Helix Water District, Padre Dam Municipal Water District, and Sweetwater Authority, clarifying the location of the WSCP and giving notice of when the draft UWMP and WSCP would be available for review. Copies of the notices are included in Appendix B. Also, in accordance with the Act, the District notified the land use jurisdictions (City of Chula Vista, City of San Diego, and County of San Diego) within its service area that it was preparing the 2025 UWMP. Prior to adoption, the District has made available its Draft 2025 UWMP to stakeholders including the Water Authority, the City of Chula Vista, the County of San Diego, and the City of San Diego. See Table 10-1. TABLE 10-1: NOTIFICATION TO CITIES AND COUNTIES DWR Submittal Table 10-1 Retail: Notification to Cities and Counties Water Code Section 10621(b) and 10642 City Name 60 Day Notice Notice of Public Hearing City of San Diego Yes Yes City of Chula Vista Yes Yes County Name 60 Day Notice Notice of Public Hearing San Diego County Yes Yes The notice and instructions for downloading the Draft 2025 UWMP from the District’s website were also made available to interested parties. The Draft 2025 UWMP was first presented at an Engineering, Operations, and Water Resources Committee Meeting of the District’s Board of Directors. A Public Hearing regarding the 2025 UWMP was held on June 3, 2026. Notices of the Public Hearing were published in the San Diego Union-Tribune (May 20 and May 27, 2026), The Star News (May 15 and May 22, 2026), The East County Californian (May 15 and May 22, 2026), and The Alpine Sun (May 15 and May 22, 2026). Copies of the public notices are included in Appendix B. 10.2 Plan Submittal The District’s 2025 UWMP will be submitted to DWR within 30 days of adoption and by July 1, 2026. The UWMP submittal will also be completed electronically through DWR’s online submittal tool, WUEdata Portal. Otay Water District 2025 Urban Water Management Plan June 2026 References 11-1 11. REFERENCES Bnamericas. (2026). Mexico to start construction of US$840mn desalination plant in Baja California. Bnamericas News. February 2. https://www.bnamericas.com/en/news/mexico-to-start- construction-of-us840mn-desalination-plant-in-baja-california California Air Resources Board. (2022). Low-Income or Disadvantaged Communities Designated by California. https://gis.data.ca.gov/datasets/CAEnergy::low-income-or-disadvantaged- communities-designated-by-california-1/explore?location=37.038078%2C- 119.179789%2C6.48 California Department of Water Resources. (2015). California Climate Science and Data for Water Resources Management. https://cawaterlibrary.net/wp- content/uploads/2017/06/CA_Climate_Science_and_Data_Final_Release_June_2015.pdf. California Department of Water Resources. (2016). Methodologies for Calculating Baseline and Compliance Urban Per Capita Water Use. https://cawaterlibrary.net/wp- content/uploads/2017/06/Methodologies-February-2016-FINAL.pdf. California Department of Water Resources. (2025a). Draft Urban Water Management Plan Guidebook. California Department of Water Resources. (2025b). Water Districts Map. City of Chula Vista. (2005). General Plan. https://www.chulavistaca.gov/departments/development-services/planning/planning-digital-library/general-plan. City of San Diego Public Utilities Department. (2026). Public Review Draft 2025 Urban Water Management Plan. February. https://www.sandiego.gov/sites/default/files/2026-02/2025-uwmp-public-review-draft_final-1.pdf. City of San Diego. (2024). General Plan. https://www.sandiego.gov/planning/work/general-plan#2024GenPlan. County of San Diego. (2011). General Plan. https://www.sandiegocounty.gov/content/sdc/pds/generalplan.html. Metropolitan Water District of Southern California. (n.d.). Funding Opportunities: Innovative Conservation Program. https://www.mwdh2o.com/planning-for-tomorrow/funding-opportunities/#icp. Metropolitan Water District of Southern California. (2021). 2020 Water Shortage Contingency Plan. Metropolitan Water District of Southern California. (2026). 2025 Urban Water Management Plan Public Review Draft. Otay Water District. (n.d.-a). Drought Updates: Prohibited Actions. https://www.otaywater.gov/drought/. Otay Water District. (n.d.-b). Water and Sewer Rates. https://www.otaywater.gov/customer-service/billing-information/water-and-sewer-rates/. Otay Water District 2025 Urban Water Management Plan June 2026 References 11-2 Otay Water District. (n.d.-c). Education Programs. https://www.otaywater.gov/education-programs/ Otay Water District. (2011). 2010 Urban Water Management Plan. Otay Water District. (2014). Temporary Moratorium on the Installation of New Recycled Water Facilities within Otay Mesa. https://www.otaywater.gov/wp-content/uploads/2014/05/Temporary-Moratorium-Notice-July-2014-Webpage-111414.pdf. Otay Water District. (2016). 2015 Urban Water Management Plan. Otay Water District. (2020). Water Supply Assessment and Verification Report for the City of Chula Vista: Sunbow II, Phase 3 Project. Otay Water District. Otay Water District. (2021). 2020 Urban Water Management Plan. Otay Water District. (2022). Village 3 North Sub-Area Master Plan, Amendment No. 1. Otay Water District. Otay Water District. (2023). Water Supply Assessment and Verification Report for the City of Chula Vista: Otay Ranch Town Center Redevelopment Project. Otay Water District. Otay Water District. (2025). Village 8 East Sub-Area Master Plan. Otay Water District. Otay Water District. (2025). Rancho del Otay Preliminary Water System Evaluation. Otay Water District. San Diego Association of Governments (SANDAG). (2021). 2025 Regional Plan: Appendix F - Regional Growth Forecast with Sustainable Communities Land Use Pattern. https://www.sandag.org/regional-plan/-/media/10C998A6E17E42B3B6EEE218B1528CDA.ashx San Diego Association of Governments (SANDAG). (2024). Series 15 Regional Growth Forecast. https://opendata.sandag.org/stories/s/g7b3-cqbq San Diego County Water Authority. (2020). Water Authority Joins Scripps Institution of Oceanography to Optimize Water Management. Water News Network. https://www.waternewsnetwork.com/water-authority-joins-scripps-institution-of-oceanography-water-management/ San Diego County Water Authority. (2025). 2025 Urban Water Management Plan: Draft. https://www.sdcwa.org/wp-content/uploads/2026/03/SDCWA-Public-Review-Draft-2025-UWMP-with-Appendices.pdf. San Diego County Water Authority. (2026). LEAVES Program Flyer. https://www.sdcwa.org/your-water/conservation/ State Water Resources Control Board. (2024). Water Conservation and Production Reports. SoCal Water$mart. (n.d.-a). Water Savings Incentive Program FAQs. https://socalwatersmart.com/en/commercial/rebates/program-faqs/water-savings-incentive-program-faqs/ Otay Water District 2025 Urban Water Management Plan June 2026 References 11-3 SoCal Water$mart. (n.d.-b). On-site Retrofit Program. https://socalwatersmart.com/en/commercial/rebates/available-rebates/on-site-retrofit-program/ Water Conservation Garden Authority. (2026). What the Water Conservation Garden Authority Is. https://thegarden.org/jpa/boardmeetings/ Western Regional Climate Center. (2025). El Cajon (Station 042706) Climate Data, 2005–2025. https://wrcc.dri.edu/ Otay Water District 2025 Urban Water Management Plan June 2026 APPENDIX A: CALIFORNIA WATER CODE - URBAN WATER MANAGEMENT PLANNING TEXT Informational Purposes Only January 2026 A-1 Appendix A California Water Code—Urban Water Management Planning This material is for informational purposes only and is not to be used in place of official California Water Code. This appendix presents updated sections of California Water Code (Water Code) as of the publication of this Guidebook and as compiled by California Department of Water Resources (DWR) staff. The selection here focuses on the portions of Water Code directly relevant to preparation of an Urban Water Management Plan (UWMP), and sections of Water Code that are contextually relevant to urban water suppliers and DWR. Water Code published here also concerns the Urban Water Management Planning Act, the Water Conservation Act of 2009 (SB X7-7), which covers sustainable water use and demand reduction, and more. Further legislative information is available on the California Legislative Information website. Contents Water Conservation Act of 2009 (SB X7‐7) ................................................. A-3 Chapter 1. General Declarations and Policy, Sections 10608– 10608.8 .................................................................................. A-3 Chapter 2. Definitions, Section 10608.12 ............................................. A-5 Chapter 2.5. Nonfunctional Turf .......................................................... A-9 Chapter 3. Urban Retail Water Suppliers, Sections 10608.16– 10608.44 ............................................................................... A-11 Chapter 5. Sustainable Water Management, Section 10608.50 .............. A-21 Chapter 6. Standardized Data Collection, Section 10608.52 .................. A-22 Chapter 7. Funding Provisions, Sections 10608.56–10608.60 .................. A-23 Chapter 9. Urban Water Use Objectives and Water Use Reporting, Sections 10609–10609.38 ........................................................ A-24 Urban Water Management Planning Act .................................................... A-39 Chapter 1. General Declaration and Policy, Sections 10610– 10610.4 ................................................................................. A-39 Chapter 2. Definitions, Sections 10611–10618 ..................................... A-40 Chapter 3. Urban Water Management Plans ........................................ A-42 Article 1. General Provisions, Sections 10620–10621 ................... A-42 Article 2. Contents of Plans, Sections 10630–10634 ..................... A-44 Appendix A California Water Code—Urban Water Management Planning Informational Purposes Only January 2026 A-2 Article 2.5. Water Service Reliability, Section 10635 .................... A-54 Article 3. Adoption and Implementation of Plans, Sections 10640–10645 ................................................. A-55 Chapter 4. Miscellaneous Provisions, Sections 10650–10657 ................. A-58 Appendix A California Water Code—Urban Water Management Planning Informational Purposes Only January 2026 A-3 Water Conservation Act of 2009 (SB X7‐7) This section contains information extracted from Water Code Division 6, Conservation, Development, and Utilization of State Water Resources, Part 2.55, Sustainable Water Use And Demand Reduction. Click on any section header below to read Water Code directly at the California Legislative Information website. Chapter 1. General Declarations and Policy, Sections 10608–10608.8 Section 10608. The Legislature finds and declares all of the following: (a) Water is a public resource that the California Constitution protects against waste and unreasonable use. (b) Growing population, climate change, and the need to protect and grow California’s economy while protecting and restoring our fish and wildlife habitats make it essential that the state manage its water resources as efficiently as possible. (c) Diverse regional water supply portfolios will increase water supply reliability and reduce dependence on the Delta. (d) Reduced water use through conservation provides significant energy and environmental benefits, and can help protect water quality, improve streamflows, and reduce greenhouse gas emissions. (e) The success of state and local water conservation programs to increase efficiency of water use is best determined on the basis of measurable outcomes related to water use or efficiency. (f) Improvements in technology and management practices offer the potential for increasing water efficiency in California over time, providing an essential water management tool to meet the need for water for urban, agricultural, and environmental uses. (g) The Governor has called for a 20 percent per capita reduction in urban water use statewide by 2020. (h) The factors used to formulate water use efficiency targets can vary significantly from location to location based on factors including weather, patterns of urban and suburban development, and past efforts to enhance water use efficiency. (i) Per capita water use is a valid measure of a water provider’s efforts to reduce urban water use within its service area. However, per capita water use is less Appendix A California Water Code—Urban Water Management Planning Informational Purposes Only January 2026 A-4 useful for measuring relative water use efficiency between different water providers. Differences in weather, historical patterns of urban and suburban development, and density of housing in a particular location need to be considered when assessing per capita water use as a measure of efficiency. Section 10608.4. It is the intent of the Legislature, by the enactment of this part, to do all of the following: (a) Require all water suppliers to increase the efficiency of use of this essential resource. (b) Establish a framework to meet the state targets for urban water conservation identified in this part and called for by the Governor. (c) Measure increased efficiency of urban water use on a per capita basis. (d) Establish a method or methods for urban retail water suppliers to determine targets for achieving increased water use efficiency by the year 2020, in accordance with the Governor’s goal of a 20- percent reduction. (e) Establish consistent water use efficiency planning and implementation standards for urban water suppliers and agricultural water suppliers. (f) Promote urban water conservation standards that are consistent with the California Urban Water Conservation Council’s adopted best management practices and the requirements for demand management in Section 10631. (g) Establish standards that recognize and provide credit to water suppliers that made substantial capital investments in urban water conservation since the drought of the early 1990s. (h) Recognize and account for the investment of urban retail water suppliers in providing recycled water for beneficial uses. (i) Require implementation of specified efficient water management practices for agricultural water suppliers. (k) Support the economic productivity of California’s agricultural, commercial, and industrial sectors. (l) Advance regional water resources management. Section 10608.8. (a) (1) Water use efficiency measures adopted and implemented pursuant to this part or Part 2.8 (commencing with Section 10800) are water conservation measures subject to the protections provided under Section 1011. Appendix A California Water Code—Urban Water Management Planning Informational Purposes Only January 2026 A-5 (2) Because an urban agency is not required to meet its urban water use target until 2020 pursuant to subdivision (b) of Section 10608.24, an urban retail water supplier’s failure to meet those targets shall not establish a violation of law for purposes of any state administrative or judicial proceeding prior to January 1, 2021. Nothing in this paragraph limits the use of data reported to the department or the board in litigation or an administrative proceeding. This paragraph shall become inoperative on January 1, 2021. (3) To the extent feasible, the department and the board shall provide for the use of water conservation reports required under this part to meet the requirements of Section 1011 for water conservation reporting. (b) This part does not limit or otherwise affect the application of Chapter 3.5 commencing with Section 11340), Chapter 4 (commencing with Section 11370), Chapter 4.5 (commencing with Section 11400), and Chapter 5 (commencing with Section 11500) of Part 1 of Division 3 of Title 2 of the Government Code. (c) This part does not require a reduction in the total water used in the agricultural or urban sectors, because other factors, including, but not limited to, changes in agricultural economics or population growth may have greater effects on water use. This part does not limit the economic productivity of California’s agricultural, commercial, or industrial sectors. (d) The requirements of this part do not apply to an agricultural water supplier that is a party to the Quantification Settlement Agreement, as defined in subdivision (a) of Section 1 of Chapter 617 of the Statutes of 2002, during the period within which the Quantification Settlement Agreement remains in effect. After the expiration of the Quantification Settlement Agreement, to the extent conservation water projects implemented as part of the Quantification Settlement Agreement remain in effect, the conserved water created as part of those projects shall be credited against the obligations of the agricultural water supplier pursuant to this part. Chapter 2. Definitions, Section 10608.12 Section 10608.12. Unless the context otherwise requires, the following definitions govern the construction of this part: (a) “Affordable housing” has the same meaning as defined in Section 34191.30 of the Health and Safety Code. (b) “Agricultural water supplier” means a water supplier, either publicly or privately owned, providing water to 10,000 or more irrigated acres, excluding recycled water. “Agricultural water supplier” includes a supplier or contractor Appendix A California Water Code—Urban Water Management Planning Informational Purposes Only January 2026 A-6 for water, regardless of the basis of right, that distributes or sells water for ultimate resale to customers. “Agricultural water supplier” does not include the department. (c) “Base daily per capita water use” means any of the following: (1) The urban retail water supplier’s estimate of its average gross water use, reported in gallons per capita per day and calculated over a continuous 10-year period ending no earlier than December 31, 2004, and no later than December 31, 2010. (2) For an urban retail water supplier that meets at least 10 percent of its 2008 measured retail water demand through recycled water that is delivered within the service area of an urban retail water supplier or its urban wholesale water supplier, the urban retail water supplier may extend the (3) calculation described in paragraph (1) up to an additional five years to a maximum of a continuous 15-year period ending no earlier than December 31, 2004, and no later than December 31, 2010. (4) For the purposes of Section 10608.22, the urban retail water supplier’s estimate of its average gross water use, reported in gallons per capita per day and calculated over a continuous five-year period ending no earlier than December 31, 2007, and no later than December 31, 2010. (d) Baseline commercial, industrial, and institutional water use” means an urban retail water supplier’s base daily per capita water use for commercial, industrial, and institutional users. (e) “CII water use” means water used by commercial water users, industrial water users, institutional water users, and large landscape water users. (f) “Commercial water user” means a water user that provides or distributes a product or service. (g) “Common area” means that portion of a common interest development or of a property owned or managed by a homeowners’ association or a community service organization or similar entity that is not assigned or allocated to the exclusive use of the occupants of an individual dwelling unit within the property. (h) “Common interest development” has the same meaning as in Section 4100 of the Civil Code. (i) “Community service organization or similar entity” has the same meaning as in Section 4110 of the Civil Code. (j) “Community space” means an area designated by a property owner or a governmental agency to accommodate human foot traffic for civic, ceremonial, or other community events or social gatherings Appendix A California Water Code—Urban Water Management Planning Informational Purposes Only January 2026 A-7 (k) Compliance daily per capita water use” means the gross water use during the final year of the reporting period, reported in gallons per capita per day. (l) “Disadvantaged community” means a community with an annual median household income that is less than 80 percent of the statewide annual median household income. (m) “Functional turf” means a ground cover surface of turf located in a recreational use area or community space. Turf enclosed by fencing or other barriers to permanently preclude human access for recreation or assembly is not functional turf. (n) “Gross water use” means the total volume of water, whether treated or untreated, entering the distribution system of an urban retail water supplier, excluding all of the following: (1) Recycled water that is delivered within the service area of an urban retail water supplier or its urban wholesale water supplier. (2) The net volume of water that the urban retail water supplier places into long-term storage. (3) The volume of water the urban retail water supplier conveys for use by another urban water supplier. (4) The volume of water delivered for agricultural use, except as otherwise provided in subdivision (f) of Section 10608.24. (o) “Homeowners’ association” means an “association” as defined in Section 4080 of the Civil Code. (p) “Industrial water user” means a water user that is primarily a manufacturer or processor of materials as defined by the North American Industry Classification System code sectors 31 to 33, inclusive, or an entity that is a water user primarily engaged in research and development. (q) “Institutional water user” means a water user dedicated to public service. This type of user includes, among other users, higher education institutions, schools, courts, churches, hospitals, government facilities, and nonprofit research institutions. (r) “Interim urban water use target” means the midpoint between the urban retail water supplier’s base daily per capita water use and the urban retail water supplier’s urban water use target for 2020. (s) “Large landscape” means a nonresidential landscape as described in the performance measures for CII water use adopted pursuant to Section 10609.10. (t) “Locally cost effective” means that the present value of the local benefits of implementing an agricultural efficiency water management practice is greater Appendix A California Water Code—Urban Water Management Planning Informational Purposes Only January 2026 A-8 than or equal to the present value of the local cost of implementing that measure. (u) “Nonfunctional turf” means any turf that is not functional turf, and includes turf located within street rights-of-way and parking lots. (v) “Performance measures” means actions to be taken by urban retail water suppliers that will result in increased water use efficiency by CII water users. Performance measures may include, but are not limited to, educating CII water users on best management practices, conducting water use audits, and preparing water management plans. Performance measures do not include process water. (w) “Potable reuse” means direct potable reuse, indirect potable reuse for groundwater recharge, and reservoir water augmentation as those terms are defined in Section 13561. (x) “Potable water” means water that is suitable for human consumption. (y) “Process water” means water used by industrial water users for producing a product or product content or water used for research and development. Process water includes, but is not limited to, continuous manufacturing processes, and water used for testing, cleaning, and maintaining equipment. Water used to cool machinery or buildings used in the manufacturing process or necessary to maintain product quality or chemical characteristics for product manufacturing or control rooms, data centers, laboratories, clean rooms, and other industrial facility units that are integral to the manufacturing or research and development process is process water. Water used in the manufacturing process that is necessary for complying with local, state, and federal health and safety laws, and is not incidental water, is process water. Process water does not mean incidental water uses. (z) “Public water system” has the same meaning as defined in Section 116275 of the Health and Safety Code. (aa) “Recreational use area” means an area designated by a property owner or a governmental agency to accommodate human foot traffic for recreation, including, but not limited to, sports fields, golf courses, playgrounds, picnic grounds, or pet exercise areas. This recreation may be either formal or informal. (ab) “Recycled water” means recycled water, as defined in subdivision (n) of Section 13050. (ac) “Regional water resources management” means sources of supply resulting from watershed-based planning for sustainable local water reliability or any of the following alternative sources of water: (1) The capture and reuse of stormwater or rainwater. (2) The use of recycled water. Appendix A California Water Code—Urban Water Management Planning Informational Purposes Only January 2026 A-9 (3) The desalination of brackish groundwater. (4) The conjunctive use of surface water and groundwater in a manner that is consistent with the safe yield of the groundwater basin. (ad) “Reporting period” means the years for which an urban retail water supplier reports compliance with the urban water use targets. (ae) “Turf” has the same meaning as defined in Section 491 of Title 23 of the California Code of Regulations (af) “Urban retail water supplier” means a water supplier, either publicly or privately owned, that directly provides potable municipal water to more than 3,000 end users or that supplies more than 3,000 acre-feet of potable water annually at retail for municipal purposes. (ag) “Urban water supplier” has the same meaning as defined in Section 10617. (ah) “Urban water use objective” means an estimate of aggregate efficient water use for the previous year based on adopted water use efficiency standards and local service area characteristics for that year, as described in Section 10609.20. (ai) “Urban water use target” means the urban retail water supplier’s targeted future daily per capita water use. (aj) “Urban wholesale water supplier” means a water supplier, either publicly or privately owned, that provides more than 3,000 acre- feet of water annually at wholesale for potable municipal purposes. Chapter 2.5. Nonfunctional Turf Section 10608.14. (a) The use of potable water for the irrigation of nonfunctional turf located on commercial, industrial, and institutional properties, other than a cemetery, and on properties of homeowners’ associations, common interest developments, and community service organizations or similar entities is prohibited as of the following dates: (1) All properties owned by the Department of General Services, beginning January 1, 2027. (2) All properties owned by local governments, local or regional public agencies, and public water systems, except those specified in paragraph (5), beginning January 1, 2027. (3) All other institutional properties and all commercial and industrial properties, beginning January 1, 2028. Appendix A California Water Code—Urban Water Management Planning Informational Purposes Only January 2026 A-10 (4) All common areas of properties of homeowners’ associations, common interest developments, and community service organizations or similar entities, beginning January 1, 2029. (5) All properties owned by local governments, local public agencies, and public water systems in a disadvantaged community, beginning January 1, 2031, or the date upon which a state funding source is made available to fund conversion of nonfunctional turf on these properties to climate- appropriate landscapes, whichever is later. (b) Notwithstanding subdivision (a), the use of potable water is not prohibited by this section to the extent necessary to ensure the health of trees and other perennial nonturf plantings, or to the extent necessary to address an immediate health and safety need. (c) The board may, upon a showing of good cause for reasons including economic hardship, critical business need, and potential impacts to human health or safety, postpone a compliance deadline in subdivision (a) by up to three years for certain persons, institutions, and businesses, and may create a form to be used for compliance certification to the board by property owners. (d) Public water systems shall, by no later than January 1, 2027, revise their regulations, ordinances, or policies governing water service to include the requirements of subdivisions (a) and (b), as revised by the board pursuant to subdivision (c), and shall communicate the requirements to their customers on or before that date. (e) (1) An owner of commercial, industrial, or institutional property with more than 5,000 square feet of irrigated area other than a cemetery shall certify to the board, commencing June 30, 2030, and every three years thereafter through 2039, that their property is in compliance with the requirements of this chapter. (2) An owner of a property with more than 5,000 square feet of irrigated common area that is a homeowners’ association, common interest development, or community service organization or similar entity shall certify to the board, commencing June 30, 2031, and every three years thereafter through 2040, that their property is in compliance with the requirements of this chapter. (f) Noncompliance by a person or entity with this chapter or regulations adopted thereunder shall be subject to civil liability and penalties set forth in Section 1846, or to civil liability and penalties imposed by an urban retail water supplier pursuant to a locally adopted ordinance or policy. Appendix A California Water Code—Urban Water Management Planning Informational Purposes Only January 2026 A-11 (g) (1) A public water system, city, county, or city and county may enforce the provisions of this chapter. (2) To avoid duplication of enforcement, any entity identified in paragraph (1) that is not a retail public water system shall notify the retail public water system 30 days prior to enforcement of the provisions of this chapter against a property served by such system. (3) Nothing in paragraph (2) shall preclude enforcement by any entity identified in paragraph (1) once adequate notice is given. (h) The department shall, when using funds appropriated for water conservation for turf replacement, prioritize financial assistance for nonfunctional turf replacement to public water systems serving disadvantaged communities and to owners of affordable housing. (i) The department shall utilize the saveourwater.com internet website and outreach campaign to provide information and resources on converting nonfunctional turf to native vegetation. (j) The Governor’s Office of Business and Economic Development shall support small and minority-owned businesses that provide services that advance compliance with this chapter. Chapter 3. Urban Retail Water Suppliers, Sections 10608.16–10608.44 Section 10608.16. (a) The state shall achieve a 20-percent reduction in urban per capita water use in California on or before December 31, 2020. (1) The state shall make incremental progress towards the state target specified in subdivision (a) by reducing urban per capita water use by at least 10 percent on or before December 31, 2015. Section 10608.20. (a) (1) Each urban retail water supplier shall develop urban water use targets and an interim urban water use target by July 1, 2011. Urban retail water suppliers may elect to determine and report progress toward achieving these targets on an individual or regional basis, as provided in subdivision (a) of Section 10608.28, and may determine the targets on a fiscal year or calendar year basis. Appendix A California Water Code—Urban Water Management Planning Informational Purposes Only January 2026 A-12 (2) It is the intent of the Legislature that the urban water use targets described in paragraph (1) cumulatively result in a 20-percent reduction from the baseline daily per capita water use by December 31, 2020. (b) An urban retail water supplier shall adopt one of the following methods for determining its urban water use target pursuant to subdivision (a): (1) Eighty percent of the urban retail water supplier’s baseline per capita daily water use. (2) The per capita daily water use that is estimated using the sum of the following performance standards: (A) For indoor residential water use, 55 gallons per capita daily water use as a provisional standard. Upon completion of the department’s 2017 report to the Legislature pursuant to Section 10608.42, this standard may be adjusted by the Legislature by statute. (B) For landscape irrigated through dedicated or residential meters or connections, water efficiency equivalent to the standards of the Model Water Efficient Landscape Ordinance set forth in Chapter 2.7 (commencing with Section 490) of Division 2 of Title 23 of the California Code of Regulations, as in effect the later of the year of the landscape’s installation or 1992. An urban retail water supplier using the approach specified in this subparagraph shall use satellite imagery, site visits, or other best available technology to develop an accurate estimate of landscaped areas. (C) For commercial, industrial, and institutional uses, a 10- percent reduction in water use from the baseline commercial, industrial, and institutional water use by 2020. (3) Ninety-five percent of the applicable state hydrologic region target, as set forth in the state’s draft 20x2020 Water Conservation Plan (dated April 30, 2009). If the service area of an urban water supplier includes more than one hydrologic region, the supplier shall apportion its service area to each region based on population or area. (4) A method that shall be identified and developed by the department, through a public process, and reported to the Legislature no later than December 31, 2010. The method developed by the department shall identify per capita targets that cumulatively result in a statewide 20- percent reduction in urban daily per capita water use by December 31, 2020. In developing urban daily per capita water use targets, the department shall do all of the following: (A) Consider climatic differences within the state. (B) Consider population density differences within the state. (C) Provide flexibility to communities and regions in meeting the targets. Appendix A California Water Code—Urban Water Management Planning Informational Purposes Only January 2026 A-13 (D) Consider different levels of per capita water use according to plant water needs in different regions. (E) Consider different levels of commercial, industrial, and institutional water use in different regions of the state. (F) Avoid placing an undue hardship on communities that have implemented conservation measures or taken actions to keep per capita water use low. (c) If the department adopts a regulation pursuant to paragraph (4) of subdivision (b) that results in a requirement that an urban retail water supplier achieve a reduction in daily per capita water use that is greater than 20 percent by December 31, 2020, an urban retail water supplier that adopted the method described in paragraph (4) of subdivision (b) may limit its urban water use target to a reduction of not more than 20 percent by December 31, 2020, by adopting the method described in paragraph (1) of subdivision (b). (d) The department shall update the method described in paragraph (4) of subdivision (b) and report to the Legislature by December 31, 2014. An urban retail water supplier that adopted the method described in paragraph (4) of subdivision (b) may adopt a new urban daily per capita water use target pursuant to this updated method. (e) An urban retail water supplier shall include in its urban water management plan due in 2010 pursuant to Part 2.6 (commencing with Section 10610) the baseline daily per capita water use, urban water use target, interim urban water use target, and compliance daily per capita water use, along with the bases for determining those estimates, including references to supporting data. (f) When calculating per capita values for the purposes of this chapter, an urban retail water supplier shall determine population using federal, state, and local population reports and projections. (g) An urban retail water supplier may update its 2020 urban water use target in its 2015 urban water management plan required pursuant to Part 2.6 (commencing with Section 10610). (h) (1) The department, through a public process and in consultation with the California Urban Water Conservation Council, shall develop technical methodologies and criteria for the consistent implementation of this part, including, but not limited to, both of the following: (A) Methodologies for calculating base daily per capita water use, baseline commercial, industrial, and institutional water use, compliance daily per capita water use, gross water use, service area Appendix A California Water Code—Urban Water Management Planning Informational Purposes Only January 2026 A-14 population, indoor residential water use, and landscaped area water use. (B) Criteria for adjustments pursuant to subdivisions (d) and (e) of Section 10608.24. (2) The department shall post the methodologies and criteria developed pursuant to this subdivision on its internet website, and make written copies available, by October 1, 2010. An urban retail water supplier shall use the methods developed by the department in compliance with this part. (h) (1) The department shall adopt regulations for implementation of the provisions relating to process water in accordance with Section 10608.12, subdivision (e) of Section 10608.24, and subdivision (d) of Section 10608.26. (2) The initial adoption of a regulation authorized by this subdivision is deemed to address an emergency, for purposes of Sections 11346.1 and 11349.6 of the Government Code, and the department is hereby exempted for that purpose from the requirements of subdivision (b) of Section 11346.1 of the Government Code. After the initial adoption of an emergency regulation pursuant to this subdivision, the department shall not request approval from the Office of Administrative Law to readopt the regulation as an emergency regulation pursuant to Section 11346.1 of the Government Code. (j) (1) An urban retail water supplier is granted an extension to July 1, 2011, for adoption of an urban water management plan pursuant to Part 2.6 (commencing with Section 10610) due in 2010 to allow the use of technical methodologies developed by the department pursuant to paragraph (4) of subdivision (b) and subdivision (h). An urban retail water supplier that adopts an urban water management plan due in 2010 that does not use the methodologies developed by the department pursuant to subdivision (h) shall amend the plan by July 1, 2011, to comply with this part. (2) An urban wholesale water supplier whose urban water management plan prepared pursuant to Part 2.6 (commencing with Section 10610) was due and not submitted in 2010 is granted an extension to July 1, 2011, to permit coordination between an urban wholesale water supplier and urban retail water suppliers. Appendix A California Water Code—Urban Water Management Planning Informational Purposes Only January 2026 A-15 Section 10608.22. Notwithstanding the method adopted by an urban retail water supplier pursuant to Section 10608.20, an urban retail water supplier’s per capita daily water use reduction shall be no less than 5 percent of base daily per capita water use as defined in paragraph (3) of subdivision (c) of Section 10608.12. This section does not apply to an urban retail water supplier with a base daily per capita water use at or below 100 gallons per capita per day. Section 10608.24. (a) Each urban retail water supplier shall meet its interim urban water use target by December 31, 2015. (b) Each urban retail water supplier shall meet its urban water use target by December 31, 2020. (c) An urban retail water supplier’s compliance daily per capita water use shall be the measure of progress toward achievement of its urban water use target. (d) (1) When determining compliance daily per capita water use, an urban retail water supplier may consider the following factors: (A) Differences in evapotranspiration and rainfall in the baseline period compared to the compliance reporting period. (B) Substantial changes to commercial or industrial water use resulting from increased business output and economic development that have occurred during the reporting period. (C) Substantial changes to institutional water use resulting from fire suppression services or other extraordinary events, or from new or expanded operations, that have occurred during the reporting period. (2) If the urban retail water supplier elects to adjust its estimate of compliance daily per capita water use due to one or more of the factors described in paragraph (1), it shall provide the basis for, and data supporting, the adjustment in the report required by Section 10608.40. (e) When developing the urban water use target pursuant to Section 10608.20, an urban retail water supplier that has a substantial percentage of industrial water use in its service area may exclude process water from the calculation of gross water use to avoid a disproportionate burden on another customer sector. (f) (1) An urban retail water supplier that includes agricultural water use in an urban water management plan pursuant to Part 2.6 (commencing with Section 10610) may include the agricultural water use in determining Appendix A California Water Code—Urban Water Management Planning Informational Purposes Only January 2026 A-16 gross water use. An urban retail water supplier that includes agricultural water use in determining gross water use and develops its urban water use target pursuant to paragraph (2) of subdivision (b) of Section 10608.20 shall use a water efficient standard for agricultural irrigation of 100 percent of reference evapotranspiration multiplied by the crop coefficient for irrigated acres. (2) An urban retail water supplier, that is also an agricultural water supplier, is not subject to the requirements of Chapter 4 (commencing with Section 10608.48), if the agricultural water use is incorporated into its urban water use target pursuant to paragraph (1). Section 10608.26. (a) In complying with this part, an urban retail water supplier shall conduct at least one public hearing to accomplish all of the following: (1) Allow community input regarding the urban retail water supplier’s implementation plan for complying with this part. (2) Consider the economic impacts of the urban retail water supplier’s implementation plan for complying with this part. (3) Adopt a method, pursuant to subdivision (b) of Section 10608.20, for determining its urban water use target. (b) In complying with this part, an urban retail water supplier may meet its urban water use target through efficiency improvements in any combination among its customer sectors. An urban retail water supplier shall avoid placing a disproportionate burden on any customer sector. (c) For an urban retail water supplier that supplies water to a United States Department of Defense military installation, the urban retail water supplier’s implementation plan for complying with this part shall consider the conservation of that military installation under federal Executive Order 13514. (d) (1) Any ordinance or resolution adopted by an urban retail water supplier after the effective date of this section shall not require existing customers as of the effective date of this section, to undertake changes in product formulation, operations, or equipment that would reduce process water use, but may provide technical assistance and financial incentives to those customers to implement efficiency measures for process water. This section shall not limit an ordinance or resolution adopted pursuant to a declaration of drought emergency by an urban retail water supplier. (2) This part shall not be construed or enforced so as to interfere with the requirements of Chapter 4 (commencing with Section 113980) to Chapter 13 (commencing with Section 114380), inclusive, of Part 7 of Appendix A California Water Code—Urban Water Management Planning Informational Purposes Only January 2026 A-17 Division 104 of the Health and Safety Code, or any requirement or standard for the protection of public health, public safety, or worker safety established by federal, state, or local government or recommended by recognized standard setting organizations or trade associations. Section 10608.28. (a) An urban retail water supplier may meet its urban water use target within its retail service area, or through mutual agreement, by any of the following: (1) Through an urban wholesale water supplier. (2) Through a regional agency authorized to plan and implement water conservation, including, but not limited to, an agency established under the Bay Area Water Supply and Conservation Agency Act (Division 31 (commencing with Section 81300)). (3) Through a regional water management group as defined in Section 10537. (4) By an integrated regional water management funding area. (5) By hydrologic region. (6) Through other appropriate geographic scales for which computation methods have been developed by the department. (b) A regional water management group, with the written consent of its member agencies, may undertake any or all planning, reporting, and implementation functions under this chapter for the member agencies that consent to those activities. Any data or reports shall provide information both for the regional water management group and separately for each consenting urban retail water supplier and urban wholesale water supplier. Section 10608.32. All costs incurred pursuant to this part by a water utility regulated by the Public Utilities Commission may be recoverable in rates subject to review and approval by the Public Utilities Commission, and may be recorded in a memorandum account and reviewed for reasonableness by the Public Utilities Commission. Section 10608.34. (a) (1) On or before January 1, 2017, the department shall adopt rules for all of the following: (A) The conduct of standardized water loss audits by urban retail water suppliers in accordance with the method adopted by the American Water Works Association in the third edition of Water Audits and Loss Appendix A California Water Code—Urban Water Management Planning Informational Purposes Only January 2026 A-18 Control Programs, Manual M36 and in the Free Water Audit Software, version 5.0. (B) The process for validating a water loss audit report prior to submitting the report to the department. For the purposes of this section, “validating” is a process whereby an urban retail water supplier uses a technical expert to confirm the basis of all data entries in the urban retail water supplier’s water loss audit report and to appropriately characterize the quality of the reported data. The validation process shall follow the principles and terminology laid out by the American Water Works Association in the third edition of Water Audits and Loss Control Programs, Manual M36 and in the Free Water Audit Software, version 5.0. A validated water loss audit report shall include the name and technical qualifications of the person engaged for validation. (C) The technical qualifications required of a person to engage in validation, as described in subparagraph (B). (D) The certification requirements for a person selected by an urban retail water supplier to provide validation of its own water loss audit report. (E) The method of submitting a water loss audit report to the department. (2) The department shall update rules adopted pursuant to paragraph (1) no later than six months after the release of subsequent editions of the American Water Works Association’s Water Audits and Loss Control Programs, Manual M36. Except as provided by the department, until the department adopts updated rules pursuant to this paragraph, an urban retail water supplier may rely upon a subsequent edition of the American Water Works Association’s Water Audits and Loss Control Programs, Manual M36 or the Free Water Audit Software. (b) (1) On or before October 1 of each year until October 1, 2023, each urban retail water supplier reporting on a calendar year basis shall submit a completed and validated water loss audit report for the previous calendar year or the previous fiscal year as prescribed by the department pursuant to subdivision (a). (2) On or before January 1 of each year until January 1, 2024, each urban retail water supplier reporting on a fiscal year basis shall submit a completed and validated water loss audit report for the previous fiscal year as prescribed by the department pursuant to subdivision (a). (3) On or before January 1, 2024, and on or before January 1 of each year thereafter, each urban retail water supplier shall submit a completed and Appendix A California Water Code—Urban Water Management Planning Informational Purposes Only January 2026 A-19 validated water loss audit report for the previous calendar year or previous fiscal year as part of the report submitted to the department pursuant to subdivision (a) of Section 10609.24 and as prescribed by the department pursuant to subdivision (a). (4) Water loss audit reports submitted on or before October 1, 2017, may be completed and validated with assistance as described in subdivision (c). (c) Using funds available for the 2016–17 fiscal year, the board shall contribute up to four hundred thousand dollars ($400,000) towards procuring water loss audit report validation assistance for urban retail water suppliers. (d) Each water loss audit report submitted to the department shall be accompanied by information, in a form specified by the department, identifying steps taken in the preceding year to increase the validity of data entered into the final audit, reduce the volume of apparent losses, and reduce the volume of real losses. (e) At least one of the following employees of an urban retail water supplier shall attest to each water loss audit report submitted to the department: (1) The chief financial officer. (2) The chief engineer. (3) The general manager. (f) The department shall deem incomplete and return to the urban retail water supplier any final water loss audit report found by the department to be incomplete, not validated, unattested, or incongruent with known characteristics of water system operations. A water supplier shall resubmit a completed water loss audit report within 90 days of an audit being returned by the department. (g) The department shall post all validated water loss audit reports on its internet website in a manner that allows for comparisons across water suppliers. The department shall make the validated water loss audit reports available for public viewing in a timely manner after their receipt. (h) Using available funds, the department shall provide technical assistance to guide urban retail water suppliers’ water loss detection programs, including, but not limited to, metering techniques, pressure management techniques, condition-based assessment techniques for transmission and distribution pipelines, and utilization of portable and permanent water loss detection devices. (i) No earlier than January 1, 2019, and no later than July 1, 2020, the board shall adopt rules requiring urban retail water suppliers to meet performance standards for the volume of water losses. In adopting these rules, the board shall employ full life-cycle cost accounting to evaluate the costs of meeting the performance standards. The board may consider establishing a minimum Appendix A California Water Code—Urban Water Management Planning Informational Purposes Only January 2026 A-20 allowable water loss threshold that, if reached and maintained by an urban water supplier, would exempt the urban water supplier from further water loss reduction requirements. Section 10608.35. (a) The department, in coordination with the board, shall conduct necessary studies and investigations and make a recommendation to the Legislature, by January 1, 2020, on the feasibility of developing and enacting water loss reporting requirements for urban wholesale water suppliers. (b) The studies and investigations shall include an evaluation of the suitability of applying the processes and requirements of Section 10608.34 to urban wholesale water suppliers. (c) In conducting necessary studies and investigations and developing its recommendation, the department shall solicit broad public participation from stakeholders and other interested persons. Section 10608.36. Urban wholesale water suppliers shall include in the urban water management plans required pursuant to Part 2.6 (commencing with Section 10610) an assessment of their present and proposed future measures, programs, and policies to help achieve the water use reductions required by this part. Section 10608.40. Urban water retail suppliers shall report to the department on their progress in meeting their urban water use targets as part of their urban water management plans submitted pursuant to Section 10631. The data shall be reported using a standardized form developed pursuant to Section 10608.52. Section 10608.42. (a) The department shall review the 2015 urban water management plans and report to the Legislature by July 1, 2017, on progress towards achieving a 20- percent reduction in urban water use by December 31, 2020. The report shall include recommendations on changes to water efficiency standards or urban water use targets to achieve the 20- percent reduction and to reflect updated efficiency information and technology changes. (b) A report to be submitted pursuant to subdivision (a) shall be submitted in compliance with Section 9795 of the Government Code. Appendix A California Water Code—Urban Water Management Planning Informational Purposes Only January 2026 A-21 Section 10608.43. The department, in conjunction with the California Urban Water Conservation Council, by April 1, 2010, shall convene a representative task force consisting of academic experts, urban retail water suppliers, environmental organizations, commercial water users, industrial water users, and institutional water users to develop alternative best management practices for commercial, industrial, and institutional users and an assessment of the potential statewide water use efficiency improvement in the commercial, industrial, and institutional sectors that would result from implementation of these best management practices. The taskforce, in conjunction with the department, shall submit a report to the Legislature by April 1, 2012, that shall include a review of multiple sectors within commercial, industrial, and institutional users and that shall recommend water use efficiency standards for commercial, industrial, and institutional users among various sectors of water use. The report shall include, but not be limited to, the following: (a) Appropriate metrics for evaluating commercial, industrial, and institutional water use. (b) Evaluation of water demands for manufacturing processes, goods, and cooling. (c) Evaluation of public infrastructure necessary for delivery of recycled water to the commercial, industrial, and institutional sectors. (d) Evaluation of institutional and economic barriers to increased recycled water use within the commercial, industrial, and institutional sectors. (e) Identification of technical feasibility and cost of the best management practices to achieve more efficient water use statewide in the commercial, industrial, and institutional sectors that is consistent with the public interest and reflects past investments in water use efficiency. Section 10608.44. Each state agency shall reduce water use at facilities it operates to support urban retail water suppliers in meeting the target identified in Section 10608.16. Chapter 5. Sustainable Water Management, Section 10608.50 Section 10608.50. (a) The department, in consultation with the board, shall promote implementation of regional water resources management practices through increased incentives and removal of barriers consistent with state and federal law. Potential changes may include, but are not limited to, all of the following: Appendix A California Water Code—Urban Water Management Planning Informational Purposes Only January 2026 A-22 (1) Revisions to the requirements for urban and agricultural water management plans. (2) Revisions to the requirements for integrated regional water management plans. (3) Revisions to the eligibility for state water management grants and loans. (4) Revisions to state or local permitting requirements that increase water supply opportunities, but do not weaken water quality protection under state and federal law. (5) Increased funding for research, feasibility studies, and project construction. (6) Expanding technical and educational support for local land use and water management agencies. (b) No later than January 1, 2011, and updated as part of the California Water Plan, the department, in consultation with the board, and with public input, shall propose new statewide targets, or review and update existing statewide targets, for regional water resources management practices, including, but not limited to, recycled water, brackish groundwater desalination, and infiltration and direct use of urban stormwater runoff. Chapter 6. Standardized Data Collection, Section 10608.52 Section 10608.52. (a) The department, in consultation with the board, the California Bay-Delta Authority or its successor agency, the State Department of Public Health, and the Public Utilities Commission, shall develop a single standardized water use reporting form to meet the water use information needs of each agency, including the needs of urban water suppliers that elect to determine and report progress toward achieving targets on a regional basis as provided in subdivision (a) of Section 10608.28. (b) At a minimum, the form shall be developed to accommodate information sufficient to assess an urban water supplier’s compliance with conservation targets pursuant to Section 10608.24 and an agricultural water supplier’s compliance with implementation of efficient water management practices pursuant to subdivision (a) of Section 10608.48. The form shall accommodate reporting by urban water suppliers on an individual or regional basis as provided in subdivision (a) of Section 10608.28. Appendix A California Water Code—Urban Water Management Planning Informational Purposes Only January 2026 A-23 Chapter 7. Funding Provisions, Sections 10608.56– 10608.60 Section 10608.56. (a) On and after July 1, 2016, an urban retail water supplier is not eligible for a water grant or loan awarded or administered by the state unless the supplier complies with this part. (b) On and after July 1, 2013, an agricultural water supplier is not eligible for a water grant or loan awarded or administered by the state unless the supplier complies with this part. (c) Notwithstanding subdivision (a), the department shall determine that an urban retail water supplier is eligible for a water grant or loan even though the supplier has not met the per capita reductions required pursuant to Section 10608.24, if the urban retail water supplier has submitted to the department for approval a schedule, financing plan, and budget, to be included in the grant or loan agreement, for achieving the per capita reductions. The supplier may request grant or loan funds to achieve the per capita reductions to the extent the request is consistent with the eligibility requirements applicable to the water funds. (d) Notwithstanding subdivision (b), the department shall determine that an agricultural water supplier is eligible for a water grant or loan even though the supplier is not implementing all of the efficient water management practices described in Section 10608.48, if the agricultural water supplier has submitted to the department for approval a schedule, financing plan, and budget, to be included in the grant or loan agreement, for implementation of the efficient water management practices. The supplier may request grant or loan funds to implement the efficient water management practices to the extent the request is consistent with the eligibility requirements applicable to the water funds. (e) Notwithstanding subdivision (a), the department shall determine that an urban retail water supplier is eligible for a water grant or loan even though the supplier has not met the per capita reductions required pursuant to Section 10608.24, if the urban retail water supplier has submitted to the department for approval documentation demonstrating that its entire service area qualifies as a disadvantaged community. (f) The department shall not deny eligibility to an urban retail water supplier or agricultural water supplier in compliance with the requirements of this part and Part 2.8 (commencing with Section 10800), that is participating in a multiagency water project, or an integrated regional water management plan, developed pursuant to Section 75026 of the Public Resources Code, solely on the basis that one or more of the agencies participating in the project or plan Appendix A California Water Code—Urban Water Management Planning Informational Purposes Only January 2026 A-24 is not implementing all of the requirements of this part or Part 2.8 (commencing with Section 10800). Section 10608.60. (a) It is the intent of the Legislature that funds made available by Section 75026 of the Public Resources Code should be expended, consistent with Division 43 (commencing with Section 75001) of the Public Resources Code and upon appropriation by the Legislature, for grants to implement this part. In the allocation of funding, it is the intent of the Legislature that the department give consideration to disadvantaged communities to assist in implementing the requirements of this part. (b) It is the intent of the Legislature that funds made available by Section 75041 of the Public Resources Code, should be expended, consistent with Division 43 (commencing with Section 75001) of the Public Resources Code and upon appropriation by the Legislature, for direct expenditures to implement this part. Chapter 9. Urban Water Use Objectives and Water Use Reporting, Sections 10609–10609.38 Section 10609. (a) The Legislature finds and declares that this chapter establishes a method to estimate the aggregate amount of water that would have been delivered the previous year by an urban retail water supplier if all that water had been used efficiently. This estimated aggregate water use is the urban retail water supplier’s urban water use objective. The method is based on water use efficiency standards and local service area characteristics for that year. By comparing the amount of water actually used in the previous year with the urban water use objective, local urban water suppliers will be in a better position to help eliminate unnecessary use of water; that is, water used in excess of that needed to accomplish the intended beneficial use. (b) The Legislature further finds and declares all of the following: (1) This chapter establishes standards and practices for the following water uses: (A) Indoor residential use. (B) Outdoor residential use. (C) CII water use. (D) Water losses. Appendix A California Water Code—Urban Water Management Planning Informational Purposes Only January 2026 A-25 (E) Other unique local uses and situations that can have a material effect on an urban water supplier’s total water use. (2) This chapter further does all of the following: (A) Establishes a method to calculate each urban water use objective. (B) Considers recycled water quality in establishing efficient irrigation standards. (C) Requires the department to provide or otherwise identify data regarding the unique local conditions to support the calculation of an urban water use objective. (D) Provides for the use of alternative sources of data if alternative sources are shown to be as accurate as, or more accurate than, the data provided by the department. (E) Requires annual reporting of the previous year’s water use with the urban water use objective. (F) Provides a bonus incentive for the amount of potable recycled water used the previous year when comparing the previous year’s water use with the urban water use objective, of up to 10 percent of the urban water use objective. (3) This chapter requires the department and the board to solicit broad public participation from stakeholders and other interested persons in the development of the standards and the adoption of regulations pursuant to this chapter. (4) This chapter preserves the Legislature’s authority over long- term water use efficiency target setting and ensures appropriate legislative oversight of the implementation of this chapter by doing all of the following: (A) Requiring the Legislative Analyst to conduct a review of the implementation of this chapter, including compliance with the adopted standards and regulations, accuracy of the data, use of alternate data, and other issues the Legislative Analyst deems appropriate. (B) Stating legislative intent that the director of the department and the chairperson of the board appear before the appropriate Senate and Assembly policy committees to report on progress in implementing this chapter. (C) Providing one-time-only authority to the department and board to adopt water use efficiency standards, except as explicitly provided in this chapter. Authorization to update the standards shall require separate legislation. Appendix A California Water Code—Urban Water Management Planning Informational Purposes Only January 2026 A-26 (c) It is the intent of the Legislature that the following principles apply to the development and implementation of long-term standards and urban water use objectives: (1) Local urban retail water suppliers should have primary responsibility for meeting standards-based water use targets, and they shall retain the flexibility to develop their water supply portfolios, design and implement water conservation strategies, educate their customers, and enforce their rules. (2) Long-term standards and urban water use objectives should advance the state’s goals to mitigate and adapt to climate change. (3) Long-term standards and urban water use objectives should acknowledge the shade, air quality, and heat-island reduction benefits provided to communities by trees through the support of water-efficient irrigation practices that keep trees healthy. (4) The state should identify opportunities for streamlined reporting, eliminate redundant data submissions, and incentivize open access to data collected by urban and agricultural water suppliers. Section 10609.2. (a) The board, in coordination with the department, shall adopt long-term standards for the efficient use of water pursuant to this chapter on or before June 30, 2022. (b) Standards shall be adopted for all of the following: (1) Outdoor residential water use. (2) Outdoor irrigation of landscape areas with dedicated irrigation meters in connection with CII water use. (3) A volume for water loss. (c) When adopting the standards under this section, the board shall consider the policies of this chapter and the proposed efficiency standards’ effects on local wastewater management, developed and natural parklands, and urban tree health. The standards and potential effects shall be identified by May 30, 2022. The board shall allow for public comment on potential effects identified by the board under this subdivision. (d) The long-term standards shall be set at a level designed so that the water use objectives, together with other demands excluded from the long-term standards such as CII indoor water use and CII outdoor water use not connected to a dedicated landscape meter, would exceed the statewide conservation targets required pursuant to Chapter 3 (commencing with Section 10608.16). Appendix A California Water Code—Urban Water Management Planning Informational Purposes Only January 2026 A-27 (e) The board, in coordination with the department, shall adopt by regulation variances recommended by the department pursuant to Section 10609.14 and guidelines and methodologies pertaining to the calculation of an urban retail water supplier’s urban water use objective recommended by the department pursuant to Section 10609.16. Section 10609.4. (a) (1) Until January 1, 2025, the standard for indoor residential water use shall be 55 gallons per capita daily. (2) Beginning January 1, 2025, and until January 1, 2030, the standard for indoor residential water use shall be 47 gallons per capita daily. (3) Beginning January 1, 2030, the standard for indoor residential water use shall be 42 gallons per capita daily. (b) (1) The department, in coordination with the board, shall conduct necessary studies and investigations to assess and quantify the economic benefits and impacts of the 2030 indoor residential use standard on water, wastewater, and recycled water systems and shall include saturation end- use studies. The studies and investigations shall build on the standards and potential effects identified pursuant to subdivision (c) of Section 10609.2 and shall also consider, and as appropriate incorporate, other regional and statewide studies that quantify the impacts on water, wastewater, and recycled water systems, and evaluate the long-term effects of telework. To facilitate these studies and investigations, the board may request necessary and relevant information from wastewater agencies, including monthly influent flow, actions taken to reassess treatment processes, and the impact of the implementation of this chapter on wastewater operations, maintenance, and capital investment. The department, in coordination with the board, shall summarize the findings of these studies and investigations in a report to the Legislature on or before October 1, 2028. The report shall be submitted in compliance with Section 9795 of the Government Code. (2) If the department, in coordination with the board, determines that the 2030 indoor residential use standard is likely to unduly impact affordability of water and wastewater services, the department and the board may jointly recommend to the Legislature an alternate date on which the 2030 indoor residential use standard shall take effect. This determination shall be made using at least two years of data reflecting application of the 2025 indoor residential use standard. Appendix A California Water Code—Urban Water Management Planning Informational Purposes Only January 2026 A-28 (3) Based upon the studies and investigations conducted pursuant to paragraph (1), the department shall consider whether to recommend, for adoption by the board, additional variances to accommodate unique challenges related to residential indoor water use pursuant to Section 10609.2. Variance options may include, but are not limited to, stranded assets, impacts on disadvantaged communities, impacts to environmental flows, or adverse impacts to wastewater or recycled water operations. (4) The studies, investigations, and report described in paragraph (1) shall include timely and inclusive collaboration with, and input from, a broad group of stakeholders, including, but not limited to, environmental groups, experts in indoor plumbing, water, wastewater, and recycled water agencies. (c) An urban retail water supplier shall not be subject to enforcement pursuant to this chapter solely for failing to meet the indoor residential use standard. Section 10609.6. (a) (1) The department, in coordination with the board, shall conduct necessary studies and investigations and recommend, no later than October 1, 2021, standards for outdoor residential use for adoption by the board in accordance with this chapter. (2) (A) The standards shall incorporate the principles of the model water efficient landscape ordinance adopted by the department pursuant to the Water Conservation in Landscaping Act (Article 10.8 (commencing with Section 65591) of Chapter 3 of Division 1 of Title 7 of the Government Code). (B) The standards shall apply to irrigable lands. (C) The standards shall include provisions for swimming pools, spas, and other water features. Ornamental water features that are artificially supplied with water, including ponds, lakes, waterfalls, and fountains, shall be analyzed separately from swimming pools and spas. (b) The department shall, by January 1, 2021, provide each urban retail water supplier with data regarding the area of residential irrigable lands in a manner that can reasonably be applied to the standards adopted pursuant to this section. (c) The department shall not recommend standards pursuant to this section until it has conducted pilot projects or studies, or some combination of the two, to ensure that the data provided to local agencies are reasonably accurate for the Appendix A California Water Code—Urban Water Management Planning Informational Purposes Only January 2026 A-29 data’s intended uses, taking into consideration California’s diverse landscapes and community characteristics. Section 10609.8. (a) The department, in coordination with the board, shall conduct necessary studies and investigations and recommend, no later than October 1, 2021, standards for outdoor irrigation of landscape areas with dedicated irrigation meters or other means of calculating outdoor irrigation use in connection with CII water use for adoption by the board in accordance with this chapter. (b) The standards shall incorporate the principles of the model water efficient landscape ordinance adopted by the department pursuant to the Water Conservation in Landscaping Act (Article 10.8 (commencing with Section 65591) of Chapter 3 of Division 1 of Title 7 of the Government Code). (c) The standards shall include an exclusion for water for commercial agricultural use meeting the definition of subdivision (b) of Section 51201 of the Government Code. Section 10609.9. For purposes of Sections 10609.6 and 10609.8, “principles of the model water efficient landscape ordinance” means those provisions of the model water efficient landscape ordinance applicable to the establishment or determination of the amount of water necessary to efficiently irrigate both new and existing landscapes. These provisions include, but are not limited to, all of the following: (a) Evapotranspiration adjustment factors, as applicable. (b) Landscape area. (c) Maximum applied water allowance. (d) Reference evapotranspiration. (e) Special landscape areas, including provisions governing evapotranspiration adjustment factors for different types of water used for irrigating the landscape. Section 10609.10. (a) The department, in coordination with the board, shall conduct necessary studies and investigations and recommend, no later than October 1, 2021, performance measures for CII water use for adoption by the board in accordance with this chapter. (b) Prior to recommending performance measures for CII water use, the department shall solicit broad public participation from stakeholders and other interested persons relating to all of the following: Appendix A California Water Code—Urban Water Management Planning Informational Purposes Only January 2026 A-30 (1) Recommendations for a CII water use classification system for California that address significant uses of water. (2) Recommendations for setting minimum size thresholds for converting mixed CII meters to dedicated irrigation meters, and evaluation of, and recommendations for, technologies that could be used in lieu of requiring dedicated irrigation meters. (3) Recommendations for CII water use best management practices, which may include, but are not limited to, water audits and water management plans for those CII customers that exceed a recommended size, volume of water use, or other threshold. (c) Recommendations of appropriate performance measures for CII water use shall be consistent with the October 21, 2013, report to the Legislature by the Commercial, Industrial, and Institutional Task Force entitled “Water Use Best Management Practices,” including the technical and financial feasibility recommendations provided in that report, and shall support the economic productivity of California’s commercial, industrial, and institutional sectors. (b) (1) The board, in coordination with the department, shall adopt performance measures for CII water use on or before June 30, 2022. (2) Each urban retail water supplier shall implement the performance measures adopted by the board pursuant to paragraph (1). Section 10609.12. The standards for water loss for urban retail water suppliers shall be the standards adopted by the board pursuant to subdivision (i) of Section 10608.34. Section 10609.14. (a) The department, in coordination with the board, shall conduct necessary studies and investigations and, no later than October 1, 2021, recommend for adoption by the board in accordance with this chapter appropriate variances for unique uses that can have a material effect on an urban retail water supplier’s urban water use objective. (b) Appropriate variances may include, but are not limited to, allowances for the following: (1) Significant use of evaporative coolers. (2) Significant populations of horses and other livestock. (3) Significant fluctuations in seasonal populations. (4) Significant landscaped areas irrigated with recycled water having high levels of total dissolved solids. Appendix A California Water Code—Urban Water Management Planning Informational Purposes Only January 2026 A-31 (5) Significant use of water for soil compaction and dust control. (6) Significant use of water to supplement ponds and lakes to sustain wildlife. (7) Significant use of water to irrigate vegetation for fire protection. (8) Significant use of water for commercial or noncommercial agricultural use. (d) The department, in recommending variances for adoption by the board, shall also recommend a threshold of significance for each recommended variance. (e) Before including any specific variance in calculating an urban retail water supplier’s water use objective, the urban retail water supplier shall request and receive approval by the board for the inclusion of that variance. (f) The board shall post on its Internet Web site all of the following: (1) A list of all urban retail water suppliers with approved variances. (2) The specific variance or variances approved for each urban retail water supplier. (3) The data supporting approval of each variance. Section 10609.15. To help streamline water data reporting, the department and the board shall do all of the following: (a) Identify urban water reporting requirements shared by both agencies, and post on each agency’s Internet Web site how the data is used for planning, regulatory, or other purposes. (b) Analyze opportunities for more efficient publication of urban water reporting requirements within each agency, and analyze how each agency can integrate various data sets in a publicly accessible location, identify priority actions, and implement priority actions identified in the analysis. (c) Make appropriate data pertaining to the urban water reporting requirements that are collected by either agency available to the public according to the principles and requirements of the Open and Transparent Water Data Act (Part 4.9 (commencing with Section 12400)). Section 10609.16. The department, in coordination with the board, shall conduct necessary studies and investigations and recommend, no later than October 1, 2021, guidelines and methodologies for the board to adopt that identify how an urban retail water supplier calculates its urban water use objective. The guidelines and methodologies shall address, as necessary, all of the following: Appendix A California Water Code—Urban Water Management Planning Informational Purposes Only January 2026 A-32 (a) Determining the irrigable lands within the urban retail water supplier’s service area. (b) Updating and revising methodologies described pursuant to subparagraph (A) of paragraph (1) of subdivision (h) of Section 10608.20, as appropriate, including methodologies for calculating the population in an urban retail water supplier’s service area. (c) Using landscape area data provided by the department or alternative data. (d) Incorporating precipitation data and climate data into estimates of a urban retail water supplier’s outdoor irrigation budget for its urban water use objective. (e) Estimating changes in outdoor landscape area and population, and calculating the urban water use objective, for years when updated landscape imagery is not available from the department. (f) Determining acceptable levels of accuracy for the supporting data, the urban water use objective, and compliance with the urban water use objective. Section 10609.18. The department and the board shall solicit broad public participation from stakeholders and other interested persons in the development of the standards and the adoption of regulations pursuant to this chapter. The board shall hold at least one public meeting before taking any action on any standard or variance recommended by the department. Section 10609.20. (a) Each urban retail water supplier shall calculate its urban water use objective no later than January 1, 2024, and by January 1 every year thereafter. (b) The calculation shall be based on the urban retail water supplier’s water use conditions for the previous calendar or fiscal year. (c) Each urban water supplier’s urban water use objective shall be composed of the sum of the following: (1) Aggregate estimated efficient indoor residential water use. (2) Aggregate estimated efficient outdoor residential water use. (3) Aggregate estimated efficient outdoor irrigation of landscape areas with dedicated irrigation meters or equivalent technology in connection with CII water use. (4) Aggregate estimated efficient water losses. (5) Aggregate estimated water use in accordance with variances, as appropriate. Appendix A California Water Code—Urban Water Management Planning Informational Purposes Only January 2026 A-33 (d) (1) An urban retail water supplier that delivers water from a groundwater basin, reservoir, or other source that is augmented by potable reuse water may adjust its urban water use objective by a bonus incentive calculated pursuant to this subdivision. (2) The water use objective bonus incentive shall be the volume of its potable reuse delivered to residential water users and to landscape areas with dedicated irrigation meters in connection with CII water use, on an acre- foot basis. (3) The bonus incentive pursuant to paragraph (1) shall be limited in accordance with one of the following: (A) The bonus incentive shall not exceed 15 percent of the urban water supplier’s water use objective for any potable reuse water produced at an existing facility. (B) The bonus incentive shall not exceed 10 percent of the urban water supplier’s water use objective for any potable reuse water produced at any facility that is not an existing facility. (4) For purposes of this subdivision, “existing facility” means a facility that meets all of the following: (A) The facility has a certified environmental impact report, mitigated negative declaration, or negative declaration on or before January 1, 2019. (B) The facility begins producing and delivering potable reuse water on or before January 1, 2022. (C) The facility uses microfiltration and reverse osmosis technologies to produce the potable reuse water. (e) (1) The calculation of the urban water use objective shall be made using landscape area and other data provided by the department and pursuant to the standards, guidelines, and methodologies adopted by the board. The department shall provide data to the urban water supplier at a level of detail sufficient to allow the urban water supplier to verify its accuracy at the parcel level. (2) Notwithstanding paragraph (1), an urban retail water supplier may use alternative data in calculating the urban water use objective if the supplier demonstrates to the department that the alternative data are equivalent, or superior, in quality and accuracy to the data provided by the department. The department may provide technical assistance to an Appendix A California Water Code—Urban Water Management Planning Informational Purposes Only January 2026 A-34 urban retail water supplier in evaluating whether the alternative data are appropriate for use in calculating the supplier’s urban water use objective. Section 10609.21. (a) For purposes of Section 10609.20, and notwithstanding paragraph (4) of subdivision (d) of Section 10609.20, “existing facility” also includes the North City Project, phase one of the Pure Water San Diego Program, for which an environmental impact report was certified on April 10, 2018. (b) This section shall become operative on January 1, 2019. Section 10609.22. (a) An urban retail water supplier shall calculate its actual urban water use no later than January 1, 2024, and by January 1 every year thereafter. (b) The calculation shall be based on the urban retail water supplier’s water use for the previous calendar or fiscal year. (c) Each urban water supplier’s urban water use shall be composed of the sum of the following: (1) Aggregate residential water use. (2) Aggregate outdoor irrigation of landscape areas with dedicated irrigation meters in connection with CII water use. (3) Aggregate water losses. Section 10609.24. (a) An urban retail water supplier shall submit a report to the department no later than January 1, 2024, and by January 1 every year thereafter. The report shall include all of the following: (1) The urban water use objective calculated pursuant to Section 10609.20 along with relevant supporting data. (2) The actual urban water use calculated pursuant to Section 10609.22 along with relevant supporting data. (3) Documentation of the implementation of the performance measures for CII water use. (4) A description of the progress made towards meeting the urban water use objective. (5) The validated water loss audit report conducted pursuant to Section 10608.34. (b) The department shall post the reports and information on its internet website. Appendix A California Water Code—Urban Water Management Planning Informational Purposes Only January 2026 A-35 (c) The board may issue an information order or conservation order to, or impose civil liability on, an entity or individual for failure to submit a report required by this section. Section 10609.25. As part of the first report submitted to the department by an urban retail water supplier no later than January 1, 2024, pursuant to subdivision (a) of Section 10609.24, each urban retail water supplier shall provide a narrative that describes the water demand management measures that the supplier plans to implement to achieve its urban water use objective by January 1, 2027. Section 10609.26. (a) (1) On and after January 1, 2024, the board may issue informational orders pertaining to water production, water use, and water conservation to an urban retail water supplier that does not meet its urban water use objective required by this chapter. Informational orders are intended to obtain information on supplier activities, water production, and conservation efforts in order to identify technical assistance needs and assist urban water suppliers in meeting their urban water use objectives. (2) In determining whether to issue an informational order, the board shall consider the degree to which the urban retail water supplier is not meeting its urban water use objective, information provided in the report required by Section 10609.24, and actions the urban retail water supplier has implemented or will implement in order to help meet the urban water use objective. (3) The board shall share information received pursuant to this subdivision with the department. (4) An urban water supplier may request technical assistance from the department. The technical assistance may, to the extent available, include guidance documents, tools, and data. (b) On and after January 1, 2025, the board may issue a written notice to an urban retail water supplier that does not meet its urban water use objective required by this chapter. The written notice may warn the urban retail water supplier that it is not meeting its urban water use objective described in Section 10609.20 and is not making adequate progress in meeting the urban water use objective, and may request that the urban retail water supplier address areas of concern in its next annual report required by Section 10609.24. In deciding whether to issue a written notice, the board may consider whether the urban retail water supplier has received an informational order, the degree to which the urban retail water supplier is not Appendix A California Water Code—Urban Water Management Planning Informational Purposes Only January 2026 A-36 meeting its urban water use objective, information provided in the report required by Section 10609.24, and actions the urban retail water supplier has implemented or will implement in order to help meet its urban water use objective. (1) On and after January 1, 2026, the board may issue a conservation order to an urban retail water supplier that does not meet its urban water use objective. A conservation order may consist of, but is not limited to, referral to the department for technical assistance, requirements for education and outreach, requirements for local enforcement, and other efforts to assist urban retail water suppliers in meeting their urban water use objective. (2) In issuing a conservation order, the board shall identify specific deficiencies in an urban retail water supplier’s progress towards meeting its urban water use objective, and identify specific actions to address the deficiencies. (3) The board may request that the department provide an urban retail water supplier with technical assistance to support the urban retail water supplier’s actions to remedy the deficiencies. (c) A conservation order issued in accordance with this chapter may include requiring actions intended to increase water-use efficiency, but shall not curtail or otherwise limit the exercise of a water right, nor shall it require the imposition of civil liability pursuant to Section 377. Section 10609.27. Notwithstanding Section 10609.26, the board shall not issue an information order, written notice, or conservation order pursuant to Section 10609.26 if both of the following conditions are met: (a) The board determines that the urban retail water supplier is not meeting its urban water use objective solely because the volume of water loss exceeds the urban retail water supplier’s standard for water loss. (b) Pursuant to Section 10608.34, the board is taking enforcement action against the urban retail water supplier for not meeting the performance standards for the volume of water losses. Section 10609.28. The board may issue a regulation or informational order requiring a wholesale water supplier, an urban retail water supplier, or a distributor of a public water supply, as that term is used in Section 350, to provide a monthly report relating to water production, water use, or water conservation. Appendix A California Water Code—Urban Water Management Planning Informational Purposes Only January 2026 A-37 Section 10609.30. On or before January 10, 2024, the Legislative Analyst shall provide to the appropriate policy committees of both houses of the Legislature and the public a report evaluating the implementation of the water use efficiency standards and water use reporting pursuant to this chapter. The board and the department shall provide the Legislative Analyst with the available data to complete this report. (a) The report shall describe all of the following: (1) The rate at which urban retail water users are complying with the standards, and factors that might facilitate or impede their compliance. (2) The accuracy of the data and estimates being used to calculate urban water use objectives. (3) Indications of the economic impacts, if any, of the implementation of this chapter on urban water suppliers and urban water users, including CII water users. (4) The frequency of use of the bonus incentive, the volume of water associated with the bonus incentive, value to urban water suppliers of the bonus incentive, and any implications of the use of the bonus incentive on water use efficiency. (5) The early indications of how implementing this chapter might impact the efficiency of statewide urban water use. 6) Recommendations, if any, for improving statewide urban water use efficiency and the standards and practices described in this chapter. (7) Any other issues the Legislative Analyst deems appropriate. Section 10609.32. It is the intent of the Legislature that the chairperson of the board and the director of the department appear before the appropriate policy committees of both houses of the Legislature on or around January 1, 2026, and report on the implementation of the water use efficiency standards and water use reporting pursuant to this chapter. It is the intent of the Legislature that the topics to be covered include all of the following: (a) The rate at which urban retail water suppliers are complying with the standards, and factors that might facilitate or impede their compliance. (b) What enforcement actions have been taken, if any. (c) The accuracy of the data and estimates being used to calculate urban water use objectives. Appendix A California Water Code—Urban Water Management Planning Informational Purposes Only January 2026 A-38 (d) Indications of the economic impacts, if any, of the implementation of this chapter on urban water suppliers and urban water users, including CII water users. (e) The frequency of use of the bonus incentive, the volume of water associated with the bonus incentive, value to urban water suppliers of the bonus incentive, and any implications of the use of the bonus incentive on water use efficiency. (f) An assessment of how implementing this chapter is affecting the efficiency of statewide urban water use. Section 10609.34. Notwithstanding Section 15300.2 of Title 14 of the California Code of Regulations, an action of the board taken under this chapter shall be deemed to be a Class 8 action, within the meaning of Section 15308 of Title 14 of the California Code of Regulations, provided that the action does not involve relaxation of existing water conservation or water use standards. Section 10609.36. (a) Nothing in this chapter shall be construed to determine or alter water rights. Sections 1010 and 1011 apply to water conserved through implementation of this chapter. (b) Nothing in this chapter shall be construed to authorize the board to update or revise water use efficiency standards authorized by this chapter except as explicitly provided in this chapter. Authorization to update the standards beyond that explicitly provided in this chapter shall require separate legislation. (c) Nothing in this chapter shall be construed to limit or otherwise affect the use of recycled water as seawater barriers for groundwater salinity management. Section 10609.38. The board may waive the requirements of this chapter for a period of up to five years for any urban retail water supplier whose water deliveries are significantly affected by changes in water use as a result of damage from a disaster such as an earthquake or fire. In establishing the period of a waiver, the board shall take into consideration the breadth of the damage and the time necessary for the damaged areas to recover from the disaster. Appendix A California Water Code—Urban Water Management Planning Informational Purposes Only January 2026 A-39 Urban Water Management Planning Act This section contains information extracted from Water Code Division 6, Conservation, Development, and Utilization of State Water Resources, Part 2.6, Urban Water Management Planning. Click on any section header below to read Water Code directly at the California Legislative Information website. Chapter 1. General Declaration and Policy, Sections 10610–10610.4 Section 10610. This part shall be known and may be cited as the “Urban Water Management Planning Act.” Section 10610.2. (a) The Legislature finds and declares all of the following: (1) The waters of the state are a limited and renewable resource subject to ever-increasing demands. (2) The conservation and efficient use of urban water supplies are of statewide concern; however, the planning for that use and the implementation of those plans can best be accomplished at the local level. (3) A long-term, reliable supply of water is essential to protect the productivity of California’s businesses and economic climate, and increasing long-term water conservation among Californians, improving water use efficiency within the state’s communities and agricultural production, and strengthening local and regional drought planning are critical to California’s resilience to drought and climate change. (4) As part of its long-range planning activities, every urban water supplier should make every effort to ensure the appropriate level of reliability in its water service sufficient to meet the needs of its various categories of customers during normal, dry, and multiple dry water years now and into the foreseeable future, and every urban water supplier should collaborate closely with local land-use authorities to ensure water demand forecasts are consistent with current land-use planning. (5) Public health issues have been raised over a number of contaminants that have been identified in certain local and imported water supplies. (6) Implementing effective water management strategies, including groundwater storage projects and recycled water projects, may require Appendix A California Water Code—Urban Water Management Planning Informational Purposes Only January 2026 A-40 specific water quality and salinity targets for meeting groundwater basins water quality objectives and promoting beneficial use of recycled water. (7) Water quality regulations are becoming an increasingly important factor in water agencies’ selection of raw water sources, treatment alternatives, and modifications to existing treatment facilities. (8) Changes in drinking water quality standards may also impact the usefulness of water supplies and may ultimately impact supply reliability. (9) The quality of source supplies can have a significant impact on water management strategies and supply reliability. (b) This part is intended to provide assistance to water agencies in carrying out their long-term resource planning responsibilities to ensure adequate water supplies to meet existing and future demands for water. Section 10610.4. The Legislature finds and declares that it is the policy of the state as follows: (a) The management of urban water demands and efficient use of water shall be actively pursued to protect both the people of the state and their water resources. (b) The management of urban water demands and efficient use of urban water supplies shall be a guiding criterion in public decisions. (c) Urban water suppliers shall be required to develop water management plans to achieve the efficient use of available supplies and strengthen local drought planning. Chapter 2. Definitions, Sections 10611–10618 Section 10611. Unless the context otherwise requires, the definitions of this chapter govern the construction of this part. Section 10611.3. “Customer” means a purchaser of water from a water supplier who uses the water for municipal purposes, including residential, commercial, governmental, and industrial uses. Appendix A California Water Code—Urban Water Management Planning Informational Purposes Only January 2026 A-41 Section 10611.5. “Demand management” means those water conservation measures, programs, and incentives that prevent the waste of water and promote the reasonable and efficient use and reuse of available supplies. Section 10612. “Drought risk assessment” means a method that examines water shortage risks based on the driest five-year historic sequence for the agency’s water supply, as described in subdivision (b) of Section 10635. Section 10613. “Efficient use” means those management measures that result in the most effective use of water so as to prevent its waste or unreasonable use or unreasonable method of use. Section 10614. “Person” means any individual, firm, association, organization, partnership, business, trust, corporation, company, public agency, or any agency of such an entity. Section 10615. “Plan” means an urban water management plan prepared pursuant to this part. A plan shall describe and evaluate sources of supply, reasonable and practical efficient uses, reclamation and demand management activities. The components of the plan may vary according to an individual community or area's characteristics and its capabilities to efficiently use and conserve water. The plan shall address measures for residential, commercial, governmental, and industrial water demand management as set forth in Article 2 (commencing with Section 10630) of Chapter 3. In addition, a strategy and time schedule for implementation shall be included in the plan. Section 10616. “Public agency” means any board, commission, county, city and county, city, regional agency, district, or other public entity. Section 10616.5. “Recycled water” means the reclamation and reuse of wastewater for beneficial use. Appendix A California Water Code—Urban Water Management Planning Informational Purposes Only January 2026 A-42 Section 10617. “Urban water supplier” means a supplier, either publicly or privately owned, providing water for municipal purposes either directly or indirectly to more than 3,000 customers or supplying more than 3,000 acre-feet of water annually. An urban water supplier includes a supplier or contractor for water, regardless of the basis of right, which distributes or sells for ultimate resale to customers. This part applies only to water supplied from public water systems subject to Chapter 4 (commencing with Section 116275) of Part 12 of Division 104 of the Health and Safety Code. Section 10617.5. “Water shortage contingency plan” means a document that incorporates the provisions detailed in subdivision (a) of Section 10632 and is subsequently adopted by an urban water supplier pursuant to this article. Section 10618. “Water supply and demand assessment” means a method that looks at current year and one or more dry year supplies and demands for determining water shortage risks, as described in Section 10632.1. Chapter 3. Urban Water Management Plans Article 1. General Provisions, Sections 10620–10621 Section 10620. (a) Every urban water supplier shall prepare and adopt an urban water management plan in the manner set forth in Article 3 (commencing with Section 10640). (b) Every person that becomes an urban water supplier shall adopt an urban water management plan within one year after it has become an urban water supplier. (c) An urban water supplier indirectly providing water shall not include planning elements in its water management plan as provided in Article 2 (commencing with Section 10630) that would be applicable to urban water suppliers or public agencies directly providing water, or to their customers, without the consent of those suppliers or public agencies. (d) (1) An urban water supplier may satisfy the requirements of this part by participation in areawide, regional, watershed, or basinwide urban water Appendix A California Water Code—Urban Water Management Planning Informational Purposes Only January 2026 A-43 management planning where those plans will reduce preparation costs and contribute to the achievement of conservation, efficient water use, and improved local drought resilience. (2) Notwithstanding paragraph (1), each urban water supplier shall develop its own water shortage contingency plan, but an urban water supplier may incorporate, collaborate, and otherwise share information with other urban water suppliers or other governing entities participating in an areawide, regional, watershed, or basinwide urban water management plan, an agricultural management plan, or groundwater sustainability plan development. (3) Each urban water supplier shall coordinate the preparation of its plan with other appropriate agencies in the area, including other water suppliers that share a common source, water management agencies, and relevant public agencies, to the extent practicable. (e) The urban water supplier may prepare the plan with its own staff, by contract, or in cooperation with other governmental agencies. (f) An urban water supplier shall describe in the plan water management tools and options used by that entity that will maximize resources and minimize the need to import water from other regions. Section 10621. (a) Each urban water supplier shall update its plan at least once every five years on or before July 1, in years ending in six and one, incorporating updated and new information from the five years preceding each update. (b) Every urban water supplier required to prepare a plan pursuant to this part shall, at least 60 days before the public hearing on the plan required by Section 10642, notify any city or county within which the supplier provides water supplies that the urban water supplier will be reviewing the plan and considering amendments or changes to the plan. The urban water supplier may consult with, and obtain comments from, any city or county that receives notice pursuant to this subdivision. (c) An urban water supplier regulated by the Public Utilities Commission shall include its most recent plan and water shortage contingency plan as part of the supplier’s general rate case filings. (d) The amendments to, or changes in, the plan shall be adopted and filed in the manner set forth in Article 3 (commencing with Section 10640). (e) Each urban water supplier shall update and submit its 2015 plan to the department by July 1, 2016. Appendix A California Water Code—Urban Water Management Planning Informational Purposes Only January 2026 A-44 (f) Each urban water supplier shall update and submit its 2020 plan to the department by July 1, 2021. Article 2. Contents of Plans, Sections 10630–10634 Section 10630. It is the intention of the Legislature, in enacting this part, to permit levels of water management planning commensurate with the numbers of customers served and the volume of water supplied, while accounting for impacts from climate change. Section 10630.5. Each plan shall include a simple lay description of how much water the agency has on a reliable basis, how much it needs for the foreseeable future, what the agency’s strategy is for meeting its water needs, the challenges facing the agency, and any other information necessary to provide a general understanding of the agency’s plan. Section 10631. A plan shall be adopted in accordance with this chapter that shall do all of the following: (a) Describe the service area of the supplier, including current and projected population, climate, and other social, economic, and demographic factors affecting the supplier’s water management planning. The projected population estimates shall be based upon data from the state, regional, or local service agency population projections within the service area of the urban water supplier and shall be in five-year increments to 20 years or as far as data is available. The description shall include the current and projected land uses within the existing or anticipated service area affecting the supplier’s water management planning. Urban water suppliers shall coordinate with local or regional land use authorities to determine the most appropriate land use information, including, where appropriate, land use information obtained from local or regional land use authorities, as developed pursuant to Article 5 (commencing with Section 65300) of Chapter 3 of Division 1 of Title 7 of the Government Code. (b) Identify and quantify, to the extent practicable, the existing and planned sources of water available to the supplier over the same five-year increments described in subdivision (a), providing supporting and related information, including all of the following: (1) A detailed discussion of anticipated supply availability under a normal water year, single dry year, and droughts lasting at least five years, as well as more frequent and severe periods of drought, as described in the Appendix A California Water Code—Urban Water Management Planning Informational Purposes Only January 2026 A-45 drought risk assessment. For each source of water supply, consider any information pertinent to the reliability analysis conducted pursuant to Section 10635, including changes in supply due to climate change. (2) When multiple sources of water supply are identified, a description of the management of each supply in correlation with the other identified supplies. (3) For any planned sources of water supply, a description of the measures that are being undertaken to acquire and develop those water supplies. (4) If groundwater is identified as an existing or planned source of water available to the supplier, all of the following information: (A) The current version of any groundwater sustainability plan or alternative adopted pursuant to Part 2.74 (commencing with Section 10720), any groundwater management plan adopted by the urban water supplier, including plans adopted pursuant to Part 2.75 (commencing with Section 10750), or any other specific authorization for groundwater management for basins underlying the urban water supplier’s service area. (B) A description of any groundwater basin or basins from which the urban water supplier pumps groundwater. (C) For basins that a court or the board has adjudicated the rights to pump groundwater, a copy of the order or decree adopted by the court or the board and a description of the amount of groundwater the urban water supplier has the legal right to pump under the order or decree. For a basin that has not been adjudicated, information as to whether the department has identified the basin as a high- or medium-priority basin in the most current official departmental bulletin that characterizes the condition of the groundwater basin, and a detailed description of the efforts being undertaken by the urban water supplier to coordinate with groundwater sustainability agencies or groundwater management agencies listed in subdivision (c) of Section 10723 to maintain or achieve sustainable groundwater conditions in accordance with a groundwater sustainability plan or alternative adopted pursuant to Part 2.74 (commencing with Section 10720). (D) A detailed description and analysis of the location, amount, and sufficiency of groundwater pumped by the urban water supplier for the past five years. The description and analysis shall be based on information that is reasonably available, including, but not limited to, historic use records. (E) A detailed description and analysis of the amount and location of groundwater that is projected to be pumped by the urban water Appendix A California Water Code—Urban Water Management Planning Informational Purposes Only January 2026 A-46 supplier. The description and analysis shall be based on information that is reasonably available, including, but not limited to, historic use records. (c) Describe the opportunities for exchanges or transfers of water on a short-term or long-term basis. (d) (1) For an urban retail water supplier, quantify, to the extent records are available, past and current water use, over the same five-year increments described in subdivision (a), and projected water use, based upon information developed pursuant to subdivision (a), identifying the uses among water use sectors, including, but not necessarily limited to, all of the following: (A) Single-family residential. (B) Multifamily. (C) Commercial. (D) Industrial. (E) Institutional and governmental. (F) Landscape. (G) Sales to other agencies. (H) Saline water intrusion barriers, groundwater recharge, or conjunctive use, or any combination thereof. (I) Agricultural. (J) Distribution system water loss. (2) The water use projections shall be in the same five-year increments described in subdivision (a). (3) (A) The distribution system water loss shall be quantified for each of the five years preceding the plan update, in accordance with rules adopted pursuant to Section 10608.34. (B) The distribution system water loss quantification shall be reported in accordance with a worksheet approved or developed by the department through a public process. The water loss quantification worksheet shall be based on the water system balance methodology developed by the American Water Works Association. (C) In the plan due July 1, 2021, and in each update thereafter, data shall be included to show whether the urban retail water supplier met Appendix A California Water Code—Urban Water Management Planning Informational Purposes Only January 2026 A-47 the distribution loss standards enacted by the board pursuant to Section 10608.34. (4) (A) Water use projections, where available, shall display and account for the water savings estimated to result from adopted codes, standards, ordinances, or transportation and land use plans identified by the urban water supplier, as applicable to the service area. (B) To the extent that an urban water supplier reports the information described in subparagraph (A), an urban water supplier shall do both of the following: (i) Provide citations of the various codes, standards, ordinances, or transportation and land use plans utilized in making the projections. (ii) Indicate the extent that the water use projections consider savings from codes, standards, ordinances, or transportation and land use plans. Water use projections that do not account for these water savings shall be noted of that fact. (a) Provide a description of the supplier’s water demand management measures. This description shall include all of the following: (1) (A) For an urban retail water supplier, as defined in Section 10608.12, a narrative description that addresses the nature and extent of each water demand management measure implemented over the past five years. The narrative shall describe the water demand management measures that the supplier plans to implement to achieve its water use targets pursuant to Section 10608.20. (B) The narrative pursuant to this paragraph shall include descriptions of the following water demand management measures: (i) Water waste prevention ordinances. (ii) Metering. (iii) Conservation pricing. (iv) Public education and outreach. (v) Programs to assess and manage distribution system real loss. (vi) Water conservation program coordination and staffing support. (vii) Other demand management measures that have a significant impact on water use as measured in gallons per capita per day, including innovative measures, if implemented. Appendix A California Water Code—Urban Water Management Planning Informational Purposes Only January 2026 A-48 (2) For an urban wholesale water supplier, as defined in Section 10608.12, a narrative description of the items in clauses (ii), (iv), (vi), and (vii) of subparagraph (B) of paragraph (1), and a narrative description of its distribution system asset management and wholesale supplier assistance programs. (f) Include a description of all water supply projects and water supply programs that may be undertaken by the urban water supplier to meet the total projected water use, as established pursuant to subdivision (a) of Section 10635. The urban water supplier shall include a detailed description of expected future projects and programs that the urban water supplier may implement to increase the amount of the water supply available to the urban water supplier in normal and single-dry water years and for a period of drought lasting five consecutive water years. The description shall identify specific projects and include a description of the increase in water supply that is expected to be available from each project. The description shall include an estimate with regard to the implementation timeline for each project or program. (g) Describe the opportunities for development of desalinated water, including, but not limited to, ocean water, brackish water, and groundwater, as a long-term supply. (h) An urban water supplier that relies upon a wholesale agency for a source of water shall provide the wholesale agency with water use projections from that agency for that source of water in five-year increments to 20 years or as far as data is available. The wholesale agency shall provide information to the urban water supplier for inclusion in the urban water supplier’s plan that identifies and quantifies, to the extent practicable, the existing and planned sources of water as required by subdivision (b), available from the wholesale agency to the urban water supplier over the same five- year increments, and during various water-year types in accordance with subdivision (f). An urban water supplier may rely upon water supply information provided by the wholesale agency in fulfilling the plan informational requirements of subdivisions (b) and (f). Section 10631.1. (a) The water use projections required by Section 10631 shall include projected water use for single-family and multifamily residential housing needed for lower income households, as defined in Section 50079.5 of the Health and Safety Code, as identified in the housing element of any city, county, or city and county in the service area of the supplier. (b) It is the intent of the Legislature that the identification of projected water use for single-family and multifamily residential housing for lower income households will assist a supplier in complying with the requirement under Appendix A California Water Code—Urban Water Management Planning Informational Purposes Only January 2026 A-49 Section 65589.7 of the Government Code to grant a priority for the provision of service to housing units affordable to lower income households. Section 10631.2. (a) In addition to the requirements of Section 10631, an urban water management plan shall include any of the following information that the urban water supplier can readily obtain: (1) An estimate of the amount of energy used to extract or divert water supplies. (2) An estimate of the amount of energy used to convey water supplies to the water treatment plants or distribution systems. (3) An estimate of the amount of energy used to treat water supplies. (4) An estimate of the amount of energy used to distribute water supplies through its distribution systems. (5) An estimate of the amount of energy used for treated water supplies in comparison to the amount used for nontreated water supplies. (6) An estimate of the amount of energy used to place water into or withdraw from storage. (7) Any other energy-related information the urban water supplier deems appropriate. (b) The department shall include in its guidance for the preparation of urban water management plans a methodology for the voluntary calculation or estimation of the energy intensity of urban water systems. The department may consider studies and calculations conducted by the Public Utilities Commission in developing the methodology. (c) The Legislature finds and declares that energy use is only one factor in water supply planning and shall not be considered independently of other factors. Section 10632. (a) Every urban water supplier shall prepare and adopt a water shortage contingency plan as part of its urban water management plan that consists of each of the following elements: (1) The analysis of water supply reliability conducted pursuant to Section 10635. (2) The procedures used in conducting an annual water supply and demand assessment that include, at a minimum, both of the following: (A) The written decision making process that an urban water supplier will use each year to determine its water supply reliability. Appendix A California Water Code—Urban Water Management Planning Informational Purposes Only January 2026 A-50 (B) The key data inputs and assessment methodology used to evaluate the urban water supplier’s water supply reliability for the current year and one dry year, including all of the following: (i) Current year unconstrained demand, considering weather, growth, and other influencing factors, such as policies to manage current supplies to meet demand objectives in future years, as applicable. (ii) Current year available supply, considering hydrological and regulatory conditions in the current year and one dry year. The annual supply and demand assessment may consider more than one dry year solely at the discretion of the urban water supplier. (iii) Existing infrastructure capabilities and plausible constraints. (iv) A defined set of locally applicable evaluation criteria that are consistently relied upon for each annual water supply and demand assessment. (v) A description and quantification of each source of water supply. (3) (A) Six standard water shortage levels corresponding to progressive ranges of up to 10, 20, 30, 40, and 50 percent shortages and greater than 50 percent shortage. Urban water suppliers shall define these shortage levels based on the suppliers’ water supply conditions, including percentage reductions in water supply, changes in groundwater levels, changes in surface elevation or level of subsidence, or other changes in hydrological or other local conditions indicative of the water supply available for use. Shortage levels shall also apply to catastrophic interruption of water supplies, including, but not limited to, a regional power outage, an earthquake, and other potential emergency events. (B) An urban water supplier with an existing water shortage contingency plan that uses different water shortage levels may comply with the requirement in subparagraph (A) by developing and including a cross- reference relating its existing categories to the six standard water shortage levels. (4) Shortage response actions that align with the defined shortage levels and include, at a minimum, all of the following: (A) Locally appropriate supply augmentation actions. (B) Locally appropriate demand reduction actions to adequately respond to shortages. (C) Locally appropriate operational changes. Appendix A California Water Code—Urban Water Management Planning Informational Purposes Only January 2026 A-51 (D) Additional, mandatory prohibitions against specific water use practices that are in addition to state- mandated prohibitions and appropriate to the local conditions. (E) For each action, an estimate of the extent to which the gap between supplies and demand will be reduced by implementation of the action. (5) Communication protocols and procedures to inform customers, the public, interested parties, and local, regional, and state governments, regarding, at a minimum, all of the following: (A) Any current or predicted shortages as determined by the annual water supply and demand assessment described pursuant to Section 10632.1. (B) Any shortage response actions triggered or anticipated to be triggered by the annual water supply and demand assessment described pursuant to Section 10632.1. (C) Any other relevant communications. (6) For an urban retail water supplier, customer compliance, enforcement, appeal, and exemption procedures for triggered shortage response actions as determined pursuant to Section 10632.2. (7) (A) A description of the legal authorities that empower the urban water supplier to implement and enforce its shortage response actions specified in paragraph (4) that may include, but are not limited to, statutory authorities, ordinances, resolutions, and contract provisions. (B) A statement that an urban water supplier shall declare a water shortage emergency in accordance with Chapter 3 (commencing with Section 350) of Division 1. (C) A statement that an urban water supplier shall coordinate with any city or county within which it provides water supply services for the possible proclamation of a local emergency, as defined in Section 8558 of the Government Code. (8) A description of the financial consequences of, and responses for, drought conditions, including, but not limited to, all of the following: (A) A description of potential revenue reductions and expense increases associated with activated shortage response actions described in paragraph (4). Appendix A California Water Code—Urban Water Management Planning Informational Purposes Only January 2026 A-52 (B) A description of mitigation actions needed to address revenue reductions and expense increases associated with activated shortage response actions described in paragraph (4). (C) A description of the cost of compliance with Chapter 3.3 (commencing with Section 365) of Division 1. (9) For an urban retail water supplier, monitoring and reporting requirements and procedures that ensure appropriate data is collected, tracked, and analyzed for purposes of monitoring customer compliance and to meet state reporting requirements. (10) Reevaluation and improvement procedures for systematically monitoring and evaluating the functionality of the water shortage contingency plan in order to ensure shortage risk tolerance is adequate and appropriate water shortage mitigation strategies are implemented as needed. (b) For purposes of developing the water shortage contingency plan pursuant to subdivision (a), an urban water supplier shall analyze and define water features that are artificially supplied with water, including ponds, lakes, waterfalls, and fountains, separately from swimming pools and spas, as defined in subdivision (a) of Section 115921 of the Health and Safety Code. (c) The urban water supplier shall make available the water shortage contingency plan prepared pursuant to this article to its customers and any city or county within which it provides water supplies no later than 30 days after adoption of the water shortage contingency plan. Section 10632.1. An urban water supplier shall conduct an annual water supply and demand assessment pursuant to subdivision (a) of Section 10632 and, on or before July 1 of each year, submit an annual water shortage assessment report to the department with information for anticipated shortage, triggered shortage response actions, compliance and enforcement actions, and communication actions consistent with the supplier’s water shortage contingency plan. An urban water supplier that relies on imported water from the State Water Project or the Bureau of Reclamation shall submit its annual water supply and demand assessment within 14 days of receiving its final allocations, or by July 1 of each year, whichever is later. Section 10632.2. An urban water supplier shall follow, where feasible and appropriate, the prescribed procedures and implement determined shortage response actions in its water shortage contingency plan, as identified in subdivision (a) of Section 10632, or reasonable alternative actions, provided that descriptions of the alternative actions are submitted with the annual water shortage assessment report pursuant to Section 10632.1. Nothing in this section prohibits an urban water supplier from Appendix A California Water Code—Urban Water Management Planning Informational Purposes Only January 2026 A-53 taking actions not specified in its water shortage contingency plan, if needed, without having to formally amend its urban water management plan or water shortage contingency plan. Section 10632.3. It is the intent of the Legislature that, upon proclamation by the Governor of a state of emergency under the California Emergency Services Act (Chapter 7 (commencing with Section 8550) of Division 1 of Title 2 of the Government Code) based on drought conditions, the board defer to implementation of locally adopted water shortage contingency plans to the extent practicable. Section 10632.5. (a) In addition to the requirements of paragraph (3) of subdivision of Section 10632, beginning January 1, 2020, the plan shall include a seismic risk assessment and mitigation plan to assess the vulnerability of each of the various facilities of a water system and mitigate those vulnerabilities. (b) An urban water supplier shall update the seismic risk assessment and mitigation plan when updating its urban water management plan as required by Section 10621. (c) An urban water supplier may comply with this section by submitting, pursuant to Section 10644, a copy of the most recent adopted local hazard mitigation plan or multihazard mitigation plan under the federal Disaster Mitigation Act of 2000 (Public Law 106- 390) if the local hazard mitigation plan or multihazard mitigation plan addresses seismic risk. Section 10633. The plan shall provide, to the extent available, information on recycled water and its potential for use as a water source in the service area of the urban water supplier. The preparation of the plan shall be coordinated with local water, wastewater, groundwater, and planning agencies that operate within the supplier’s service area, and shall include all of the following: (a) A description of the wastewater collection and treatment systems in the supplier’s service area, including a quantification of the amount of wastewater collected and treated and the methods of wastewater disposal. (b) A description of the quantity of treated wastewater that meets recycled water standards, is being discharged, and is otherwise available for use in a recycled water project. (c) A description of the recycled water currently being used in the supplier’s service area, including, but not limited to, the type, place, and quantity of use. Appendix A California Water Code—Urban Water Management Planning Informational Purposes Only January 2026 A-54 (d) A description and quantification of the potential uses of recycled water, including, but not limited to, agricultural irrigation, landscape irrigation, wildlife habitat enhancement, wetlands, industrial reuse, groundwater recharge, indirect potable reuse, and other appropriate uses, and a determination with regard to the technical and economic feasibility of serving those uses. (e) The projected use of recycled water within the supplier’s service area at the end of 5, 10, 15, and 20 years, and a description of the actual use of recycled water in comparison to uses previously projected pursuant to this subdivision. (f) A description of actions, including financial incentives, which may be taken to encourage the use of recycled water, and the projected results of these actions in terms of acre-feet of recycled water used per year. (g) A plan for optimizing the use of recycled water in the supplier’s service area, including actions to facilitate the installation of dual distribution systems, to promote recirculating uses, to facilitate the increased use of treated wastewater that meets recycled water standards, and to overcome any obstacles to achieving that increased use. Section 10634. The plan shall include information, to the extent practicable, relating to the quality of existing sources of water available to the supplier over the same five-year increments as described in subdivision (a) of Section 10631, and the manner in which water quality affects water management strategies and supply reliability. Article 2.5. Water Service Reliability, Section 10635 Section 10635. (a) Every urban water supplier shall include, as part of its urban water management plan, an assessment of the reliability of its water service to its customers during normal, dry, and multiple dry water years. This water supply and demand assessment shall compare the total water supply sources available to the water supplier with the long-term total projected water use over the next 20 years, in five-year increments, for a normal water year, a single dry water year, and a drought lasting five consecutive water years. The water service reliability assessment shall be based upon the information compiled pursuant to Section 10631, including available data from state, regional, or local agency population projections within the service area of the urban water supplier. (b) Every urban water supplier shall include, as part of its urban water management plan, a drought risk assessment for its water service to its customers as part of information considered in developing the demand management measures and water supply projects and programs to be included Appendix A California Water Code—Urban Water Management Planning Informational Purposes Only January 2026 A-55 in the urban water management plan. The urban water supplier may conduct an interim update or updates to this drought risk assessment within the five- year cycle of its urban water management plan update. The drought risk assessment shall include each of the following: (1) A description of the data, methodology, and basis for one or more supply shortage conditions that are necessary to conduct a drought risk assessment for a drought period that lasts five consecutive water years, starting from the year following when the assessment is conducted. (2) A determination of the reliability of each source of supply under a variety of water shortage conditions. This may include a determination that a particular source of water supply is fully reliable under most, if not all, conditions. (3) A comparison of the total water supply sources available to the water supplier with the total projected water use for the drought period. (4) Considerations of the historical drought hydrology, plausible changes on projected supplies and demands under climate change conditions, anticipated regulatory changes, and other locally applicable criteria. (c) The urban water supplier shall provide that portion of its urban water management plan prepared pursuant to this article to any city or county within which it provides water supplies no later than 60 days after the submission of its urban water management plan. (d) Nothing in this article is intended to create a right or entitlement to water service or any specific level of water service. (e) Nothing in this article is intended to change existing law concerning an urban water supplier’s obligation to provide water service to its existing customers or to any potential future customers. Article 3. Adoption and Implementation of Plans, Sections 10640–10645 Section 10640. (a) Every urban water supplier required to prepare a plan pursuant to this part shall prepare its plan pursuant to Article 2 (commencing with Section 10630). The supplier shall likewise periodically review the plan as required by Section 10621, and any amendments or changes required as a result of that review shall be adopted pursuant to this article. (b) Every urban water supplier required to prepare a water shortage contingency plan shall prepare a water shortage contingency plan pursuant to Section 10632. The supplier shall likewise periodically review the water shortage contingency plan as required by paragraph (10) of subdivision (a) of Appendix A California Water Code—Urban Water Management Planning Informational Purposes Only January 2026 A-56 Section 10632 and any amendments or changes required as a result of that review shall be adopted pursuant to this article. Section 10641. An urban water supplier required to prepare a plan or a water shortage contingency plan may consult with, and obtain comments from, any public agency or state agency or any person who has special expertise with respect to water demand management methods and techniques. Section 10642. Each urban water supplier shall encourage the active involvement of diverse social, cultural, and economic elements of the population within the service area prior to and during the preparation of both the plan and the water shortage contingency plan. Prior to adopting either, the urban water supplier shall make both the plan and the water shortage contingency plan available for public inspection and shall hold a public hearing or hearings thereon. Prior to any of these hearings, notice of the time and place of the hearing shall be published within the jurisdiction of the publicly owned water supplier pursuant to Section 6066 of the Government Code. The urban water supplier shall provide notice of the time and place of a hearing to any city or county within which the supplier provides water supplies. Notices by a local public agency pursuant to this section shall be provided pursuant to Chapter 17.5 (commencing with Section 7290) of Division 7 of Title 1 of the Government Code. A privately owned water supplier shall provide an equivalent notice within its service area. After the hearing or hearings, the plan or water shortage contingency plan shall be adopted as prepared or as modified after the hearing or hearings. Section 10643. An urban water supplier shall implement its plan adopted pursuant to this chapter in accordance with the schedule set forth in its plan. Section 10644. (a) (1) An urban water supplier shall submit to the department, the California State Library, and any city or county within which the supplier provides water supplies a copy of its plan no later than 30 days after adoption. Copies of amendments or changes to the plans shall be submitted to the department, the California State Library, and any city or county within which the supplier provides water supplies within 30 days after adoption. (2) The plan, or amendments to the plan, submitted to the department pursuant to paragraph (1) shall be submitted electronically and shall Appendix A California Water Code—Urban Water Management Planning Informational Purposes Only January 2026 A-57 include any standardized forms, tables, or displays specified by the department. (b) If an urban water supplier revises its water shortage contingency plan, the supplier shall submit to the department a copy of its water shortage contingency plan prepared pursuant to subdivision (a) of Section 10632 no later than 30 days after adoption, in accordance with protocols for submission and using electronic reporting tools developed by the department. (c) (1) (A) Notwithstanding Section 10231.5 of the Government Code, the department shall prepare and submit to the Legislature, on or before July 1, in the years ending in seven and two, a report summarizing the status of the plans and water shortage contingency plans adopted pursuant to this part. The report prepared by the department shall identify the exemplary elements of the individual plans and water shortage contingency plans. The department shall provide a copy of the report to each urban water supplier that has submitted its plan and water shortage contingency plan to the department. The department shall also prepare reports and provide data for any legislative hearings designed to consider the effectiveness of plans and water shortage contingency plans submitted pursuant to this part. (B) The department shall prepare and submit to the board, on or before September 30 of each year, a report summarizing the submitted water supply and demand assessment results along with appropriate reported water shortage conditions and the regional and statewide analysis of water supply conditions developed by the department. As part of the report, the department shall provide a summary and, as appropriate, urban water supplier specific information regarding various shortage response actions implemented as a result of annual supplier-specific water supply and demand assessments performed pursuant to Section 10632.1. (C) The department shall submit the report to the Legislature for the 2015 plans by July 1, 2017, and the report to the Legislature for the 2020 plans and water shortage contingency plans by July 1, 2022. (2) A report to be submitted pursuant to subparagraph (A) of paragraph (1) shall be submitted in compliance with Section 9795 of the Government Code. (d) The department shall make available to the public the standard the department will use to identify exemplary water demand management measures. Appendix A California Water Code—Urban Water Management Planning Informational Purposes Only January 2026 A-58 Section 10645. (a) Not later than 30 days after filing a copy of its plan with the department, the urban water supplier and the department shall make the plan available for public review during normal business hours. (b) Not later than 30 days after filing a copy of its water shortage contingency plan with the department, the urban water supplier and the department shall make the plan available for public review during normal business hours. Chapter 4. Miscellaneous Provisions, Sections 10650– 10657 Section 10650. Any actions or proceedings, other than actions by the board, to attack, review, set aside, void, or annul the acts or decisions of an urban water supplier on the grounds of noncompliance with this part shall be commenced as follows: (a) An action or proceeding alleging failure to adopt a plan or a water shortage contingency plan shall be commenced within 18 months after that adoption is required by this part. (b) Any action or proceeding alleging that a plan or water shortage contingency plan, or action taken pursuant to either, does not comply with this part shall be commenced within 90 days after filing of the plan or water shortage contingency plan or an amendment to either pursuant to Section 10644 or the taking of that action. Section 10651. In any action or proceeding to attack, review, set aside, void, or annul a plan or a water shortage contingency plan, or an action taken pursuant to either by an urban water supplier on the grounds of noncompliance with this part, the inquiry shall extend only to whether there was a prejudicial abuse of discretion. Abuse of discretion is established if the supplier has not proceeded in a manner required by law or if the action by the water supplier is not supported by substantial evidence. Section 10652. The California Environmental Quality Act (Division 13 (commencing with Section 21000) of the Public Resources Code) does not apply to the preparation and adoption of plans pursuant to this part or to the implementation of actions taken pursuant to Section 10632. Nothing in this part shall be interpreted as exempting from the California Environmental Quality Act any project that would significantly affect water supplies for fish and wildlife, or any project for implementation of the Appendix A California Water Code—Urban Water Management Planning Informational Purposes Only January 2026 A-59 plan, other than projects implementing Section 10632, or any project for expanded or additional water supplies. Section 10653. The adoption of a plan shall satisfy any requirements of state law, regulation, or order, including those of the board and the Public Utilities Commission, for the preparation of water management plans, water shortage contingency plans, or conservation plans; provided, that if the board or the Public Utilities Commission requires additional information concerning water conservation, drought response measures, or financial conditions to implement its existing authority, nothing in this part shall be deemed to limit the board or the commission in obtaining that information. The requirements of this part shall be satisfied by any urban water demand management plan that complies with analogous federal laws or regulations after the effective date of this part, and which substantially meets the requirements of this part, or by any existing urban water management plan which includes the contents of a plan required under this part. Section 10654. An urban water supplier may recover in its rates the costs incurred in preparing its urban water management plan, its drought risk assessment, its water supply and demand assessment, and its water shortage contingency plan and implementing the reasonable water conservation measures included in either of the plans. Section 10655. If any provision of this part or the application thereof to any person or circumstances is held invalid, that invalidity shall not affect other provisions or applications of this part which can be given effect without the invalid provision or application thereof, and to this end the provisions of this part are severable. Section 10656. An urban water supplier is not eligible for a water grant or loan awarded or administered by the state unless the urban water supplier complies with this part. Section 10657. The department may adopt regulations regarding the definitions of water, water use, and reporting periods, and may adopt any other regulations deemed necessary or desirable to implement this part. In developing regulations pursuant to this section, the department shall solicit broad public participation from stakeholders and other interested persons. Otay Water District 2025 Urban Water Management Plan June 2026 APPENDIX B: ADOPTION RESOLUTION AND NOTIFICATION DOCUMENTATION Notice of Plan Preparation and Distribution List Newspaper Notices Adoption Resolution March 20, 2026 SUBJECT: Otay Water District Urban Water Management Plan and Water Shortage Contingency Plan – 2025 Updates Dear Valued Customers and Stakeholders: This notice is to inform you that the Otay Water District (“District”) is preparing updates to its Urban Water Management Plan (UWMP) and Water Shortage Contingency Plan (WSCP). California state law requires the District to update its UWMP and WSCP every five years and to notify the County of San Diego and the cities within its service area that these plans are being prepared. The District is required to adopt the updated UWMP and WSCP by June 2026 and submit the adopted UWMP to the California Department of Water Resources no later than July 1, 2026. The UWMP must include a detailed evaluation of the water supplies necessary to reliably meet projected demands over at least a 20-year planning horizon during normal, single- dry, and multiple-dry water years. The UWMP also describes demand management measures and the current and planned use of recycled water. The WSCP, which is incorporated as a chapter of the UWMP, outlines the actions the District will implement in the event of a water shortage. In accordance with state law, a draft of the 2025 UWMP and WSCP will be made available on the District’s website, otaywater.gov, for public review at least two weeks prior to the public hearing. Notice is hereby given that a public hearing for the adoption of the UWMP and WSCP will be held on June 3, 2026, at 3:30 p.m., as part of the District’s regular Board of Directors meeting. Public comments may be provided at the public hearing, submitted in writing to the attention of David Blalock, P.E., at Otay Water District, 2554 Sweetwater Springs Boulevard, Spring Valley, CA 91978-2004, or emailed to dblalock@otaywater.gov. Sincerely, OTAY WATER DISTRICT David Blalock, P.E. Senior Civil Engineer City of El Cajon Anthony Shute, Director of Community Development 200 Civic Center Way, 3rd Floor El Cajon, CA 92020-3912 SANDAG Antoinette Meier, Senior Director of Regional Planning 1011 Union Street, Suite 400 San Diego, CA 92101 City of San Diego Heidi Vonblum, Director of Planning 202 C Street, M.S. 413 San Diego, CA 92101 City of Chula Vista Rebecca Bridgeford, Deputy Director, Development Services 276 Fourth Avenue, Building B Chula Vista, CA 91910-2631 City of Chula Vista Mayra Medel, Principal Planner, Advance Planning Division 276 Fourth Avenue, Building B Chula Vista, CA 91910-2631 San Diego County Water Authority Jeff Stephenson, Water Resources Manager 4677 Overland Avenue San Diego, CA 92123 County of San Diego Vince Nicoletti, Director, Department of Planning and Development Services 5510 Overland Avenue San Diego, CA 92123 San Diego LAFCO Keene Simonds, Executive Officer 2550 Fifth Avenue, Suite 725 San Diego, CA 92103 San Diego County Water Authority Efren Lopez, Water Resources Specialist 4677 Overland Avenue San Diego, CA 92123 May 1, 2026 SUBJECT: Otay Water District Urban Water Management Plan and Water Shortage Contingency Plan – 2025 Updates Dear Valued Customers and Stakeholders: Otay Water District (“District”) is preparing updates to its Urban Water Management Plan (UWMP) and Water Shortage Contingency Plan (WSCP). California state law requires the District to update its UWMP and WSCP every five years and to adopt the updated UWMP and WSCP by July 1, 2026. The UWMP must include a detailed evaluation of the water supplies necessary to reliably meet projected demands over at least a 20-year planning horizon during normal, single- dry, and multiple-dry water years. The UWMP also describes demand management measures and the current and planned use of recycled water. The WSCP, incorporated as an appendix in the UWMP, outlines the actions the District will take in the event of a water shortage. In accordance with state law, the District will make a draft of the UWMP and WSCP available on the District website for public review at least two weeks prior to the public hearing. Notice is hereby given that the Otay Water District’s draft 2025 UWMP and WSCP will be available for public review on May 13, 2026. The draft documents will be available on the District’s website, otaywater.gov. Public comments may be provided at the public hearing to be held on June 3, 2026, at 3:30 p.m., or submitted in writing to the attention of David Blalock, P.E., at Otay Water District, 2554 Sweetwater Springs Boulevard, Spring Valley, CA 91978-2004, or by email to dblalock@otaywater.gov. Sincerely, OTAY WATER DISTRICT David Blalock, P.E. Senior Civil Engineer AFFP 1 631 97 Public Hearing-Fielding Affidavit of Publication STATE OF CALTFORNTA ) couNTY oF sAN D|EGO i I am a citizen of the United States; I am over the age of eighteen years, and not a party to or interested in the above-entitled mafter. I am the principle clerk of the printer of Alpine Sun, a newspaper of general circulation, published ONCE WEEKLY in the city of Alpine, County of San Diego, which newspaper has been adjudged a newspaper of general circulation by the Superior Court of the County of San Diego, State of California under the date of November 12, 1959, Case Number 238120; lhal the notice, of which the annexed is a printed copy (set in type not smaller than nonpareil), has been published in each regular and entire issue of said newspaper and not in any supplement thereof on the following dates, to-wit: May 15, 2026, May 22,2026 That said newspaper was regularly issued and circulated on those dates. SIGNED: //Z g-- Alpine Sun Subscribed to and sworn by me this 22nd day of May 2026. 04100210 00163197 AL-OTAY WATER DISTRICT 2554 SWEETWATER SPRINGS BLVD. SPRING VALLEY, CA 91978 Otay Water District Notice of Public Hearing and Availability ol Drall2025 Urban Water Management Plan and Water Shortage Contingency Plan California state law requires the Otay Water District ("District") to update and adopt its Urban Water Management Plan (UWMP) and Water Shortage Contingency Plan (WSCP) every five years and submit the adopted UWMP and WSCP to the California Department of Water Resources by July 1,2026. The UWMP must include a detailed evaluation of the water supplies necessary to reliably meet projected demands over at least a 20-yeat planning horizon during normal, single-dry, and multiple-dry water years. The UWMP also describes demand management measures and the current and planned use of recycled water. The WSCP, incorporated as an appendix in the UWMP, outlines the, aclions the District will take in the event of a water shortage. ln accordance with state law. the District will make a draft of the UWMP and WSCP available on the District website for public review at least two weeks prior to the public hearing. NOTICE lS HEREBY GIVEN that the Otay Water District's draft2025 UWMP and WSCP will be available for public review on May 13, 2026. fhe draft documents will be available on the Dishict's website, otaywater.gov. Public comments may be provided at the public hearing to be held on June 3, 2026, at 3:30 p.m., or submitted in writing to the attention of David Blalock, P.E., at Otay Water Dishict, 2554 Sweetwater Springs Boulevard, Spring Valley, CA 91978-2004, or by email to dblalock@otaywater.gov. Alpine Sun 51 1 5,2212026-163197 SS AFFP 1 631 98 Public Hearing-Fielding Affidavit of Publication STATE OF CALTFORNTA ) couNTY oF sAN D|EGO ) I am a citizen of the United States; I am over the age of eighteen years, and not a party to or interested in the above-entitled matter. I am the principle clerk of the printer of East County Californian, Decree #51488, a newspaper of general circulation, published ONCE WEEKLY in the city of El Cajon , County of San Diego, which newspaper has been adjudged a newspaper of general circulation by the Superior Court of the County of San Diego, State of California under the date of April22, 1927, Case Number 447290; that the notice, of which the annexed is a printed copy (set in type not smaller than nonpareil), has been published in each regular and entire issue of said newspaper and not in any supplement thereof on the following dates, to-wit: May 15, 2026, May 22,2026 That said newspaper was regularly issued and circulated on those dates. SIGNED: East County Californian Subscribed to and sworn by me this 22nd day of May 2026. 20101266 00163198 EC-OTAY WATER DISTRICT 2554 SWEETWATER SPRINGS BLVD SPRING VALLEY, CA 91978 Otay Water District Notice of Public Hearing and Availability of Draft 2025 Urban Water Management Plan and Water Shortage Contingency Plan California state law requires the Otay Water District ("District") to update and adopt its Urban Water Management Plan (UWMP) and Water Shortage Contingency Plan (WSCP) every five years and submit the adopted UWMP and WSCP to the California Department of Water Resources by July 1 , 2026. The UWMP must include a detailed evaluation of the water supplies necessary to reliably meet projected demands over at least a 2l-year planning horizon during normal, single-dry, and multiple-dry water years. The UWMP also describes demand management measures and the current and planned use of recycled water. The WSCP, inccrporated as an appendix in the UWMP, outlines the actions ihe District will take in the event of a water shortage. ln accordance with state law, the District will make a draft of the UWMP and WSCP available on the District website for public review at least two weeks prior to the public hearing. NOTICE lS HEREBY GIVEN that the Otay Water District's drall2O25 UWMP and WSCP will be available for public review on May 13, 2026. The draft documents will be available on the District's website, otaywater.gov. Public comments may be provided at the public hearing to be held on June 3, 2026, at 3:30 p.m., or submitted in writing to the attention of David Blalock, P.E., at Otay Water District, 2554 Sweetwater Springs Boulevard, Spring Valley, CA 91978-2004, or by email to dblalock@otaywater.gov. East County Californian 51 1 5,2212026-163198 SS AFFP 1 631 89 Public Hearing-Fielding Affidavit of Publication STATE OF CALTFORNTA ) couNTY oF sAN D|EGO ) I am a citizen of the United States and a resident of the county aforesaid; I am over the age of eighteen years, and not a party to or interested in the above-entitled mafter. I am the principle clerk of the printer of THE STAR-NEWS,a newspaper of general circulation, published ONCE WEEKLY in the city of Chula Vista and the South Bay Judicial District, County of San Diego, which newspaper has been adjudged a newspaper of general circulation by the Superior Court of the County of San Diego, State of California, under the date of January 18, 1973, Case Number 71752; that the notice, of which the annexed is a printed copy (set in type not smaller than nonpareil), has been published in each regular and entire issue of said newspaper and not in any supplement thereof on the following dates, to-wit: May 22,2026, May 15,2026 That said newspaper was regularly issued and circulated on those dates. SIGNED: Otay Water District Notice of Public Hearing and Availability ol Uaft2025 Urban Water Management Plan and Water Shortage Contingency Plan California state law requires the Otay Water Dishict ("District") to update and adopt its Urban Water Management Plan (UWMP) and Water Shortage Contingency Plan (WSCP) every five years and submit the adopted UWMP and WSCP to the California Department of Water Resources by July 1,2026. The UWMP must include a detailed evaluation of the water supplies necessary to reliably meet projected demands over at least a 20-yeil planning horizon during normal, single-dry, and multiple-dry water years. The UWMP also describes demand management measures and the current and planned use of recycled water. The WSCP, incorporated as an appendix in the UWMP, outlines the actions the District will take in the eveni of a water shortage. ln accordance with state law, the District will make a draft of the UWMP and WSCP available on the District website for public review at least two weeks prior to the public hearing. NOTICE lS HEREBY GIVEN that the Otay Water Dishict's draft2025 UWMP and WSCP will be available for public review on May 13, 2026.The draft documents will be available on the District's website, otaywater.gov. Public comments may be provided at the public hearing to be held on June 3, 2026, at 3:30 p.m., or submitted in writing to the attention of David Blalock, P.E., at Otay Water District, 2554 Sweetwater Springs Boulevard, Spring Valley, CA 91978-2004, or by email to dblalock@otaywater.gov. cv163189 5t15,22t2026 SS ,tU g4^- Subscribed to and sworn by me this 22nd day of May 2026, Chula Vista, San Diego County, California 03100132 00163189 CV-OTAY WATER DI STRICT-LEGALS 2554 SWEETWATER SPRINGS BLVD SPRING VALLEY, CA 91978 @hc 5an biego Union-Oribune San Diego Union-Tribune (Daily) 7676 Hazatd Center Drive # 1025 San Diego, california 92108 4TL Noticeurbqn oldy wqter Dislriclol public Heofinq ond Avoilobilifv of Drott 2025 Wuler Munogedenl Plqn ond Wqtor Shorlogo Conlinqency Plon Collfornlo slste low requlres ihe Otov WoterDlstrtct (.Dtstrtct/) to urrclqle ond oclorrt lts urbqnWqter Manasemedf Plfln (UWMP) ancl Woterslroriose conflarsency Plorl (wscP) everv flveyeors orrd submlftlte odopted UWMP ond WSC P tothe collfornlo Depnrtment of wqter Resources byJuly l.2026. The UWMP rnust lncl$de o cletctlled evoluotlonof the wuter supplles necessorv to rellobly meetprolectecl demoncls over of leost Q 2o-yeclr plonlllllg horizon durlngr nonl-tol, slngle-dry, ond mulllple-dry wqter yeflrs. The UWMP olso clescrlbesdenrond mqnogement nteosures ond tlle currentond l)lonned use of recycled woter. The WSCP, lncorporflted os on dppencllx ln the UWMP, outllllesthe oailons the Dlstrlct wtll tqke ln tlle event of (l woter slrortgge. lrr sccordonce wlllr stote low, llre Dlstrlct wlllrrol(e q drofi of lhe uwMP ond wscP qvallclble ot1ihe Dlstrlct webslte for pullllc revlew of leost two weeRs prlor to the publlc heorlng. NOTICE lS HEREBY GIVEN thot the olctv woterDlsirlcl's droft 2025 UWMP ond WSCP wlll beovoll(lble for rrubllc revlew on MGv 13, 2026. Tlredrcllt doculnents wlNl be ovallctllle on the Dlstrlcf'swebslte, olsywoter.gov. Publlc conrments rnoy be provlded at the publlc lreorlng to be held on June 3, 2026, sl 3:30 p.m.r or submllled ln wrltlns to the qttentlon of DovldBl(rlock, P.E., of Ofay Wcrter Dlstrlct,2554sweetwqter Sprlnss Boulevord, Sprlng Volley, CA 9'1978-2004, or by emoll to dblslocK@otovwaler.sov. Sdn Diego Union-Tribune Published: 5J20, 5127 /26 FtLE NO. 0011791666 PROOF OF PUBLICATION STATE OF CALIFORNIA County of San Diego The Undersigned, declares under penalty of perjury under the laws of the State of California: That he/she is the resident of the County of San Diego. That he/she is and at all times herein mentioned was a citizen of the United States, over the age of twenty-one years, and that he/she is not a party to, nor interested in the above- entitled matter; that he/she is chief clerk for the publisher of San Diego Union-Tribune (Daily)a newspaper of general circulation, printed and published Daily in the City of San Diego, County of San Diego, and which newspaper is published for the dissemination of local news and intelligence of a general character, and which newspaper at all the times herein mentioned had and still has a bona fide subscription list of paying subscribers, and which newspaper has been established, printed and published at regular intervals in the said City of San Diego, County of San Diego, for a period exceeding one year next preceding the date of publication of the notice hereinafter referred to, and which newspaper is not devoted to nor published for the interests, enteftainment or instruction of a particular class, profession, trade, calling, race, or denomination, or any number of same; that the notice of which the annexed is a printed copy, has been published in said newspaper in accordance with the instruction of theperson(s) requesting publication, and not in any supplement thereof on the following dates, to-wit: 05 I 20 I 2026, 05 I 27 I 2026 I certify under penalty of perjury under the laws of the State of California that the foregoing is true and correct.. Executed at San Diego, California, this 27th day of May, 2026. Signature Jolene Fielding 2554 Sweetwater Springs Blvd Spring Valley, CA 9l-978 Draft 2025 Urban Water Management Plan - Page 1 of 1 Otay Water District 2025 Urban Water Management Plan June 2026 APPENDIX C: DWR 2025 UWMP CHECKLIST DWR 2025 UWMP Checklist Water Code Section Summary as Applies to UWMP Subject 2025 UWMP Location 10615 A plan shall describe and evaluate sources of supply, reasonable and practical efficient uses, reclamation and demand management activities.Introduction and overview Chapter 1 – Introduction and Lay Description 10630.5 Each plan shall include a simple description of the Supplier’s plan including water availability, future requirements, a strategy for meeting needs, and other pertinent information. Additionally, a Supplier may also choose to include a simple description at the beginning of each chapter. Plan preparation Chapter 1 – Introduction and Lay Description; Section 1.4 10620(b)Every person that becomes a Supplier shall adopt a UWMP within one year after it has become a Supplier.Plan preparation Chapter 2 – Plan Preparation; Section 2.1 10644 Supplier shall report the Public Water Systems number, volume of delivered water, and number of connections that are included in this UWMP.Plan preparation Chapter 2 – Plan Preparation; Table 2-1; Section 2.1 10644 Supplier shall report if this UWMP is an individual UWMP and whether the Supplier belongs to a regional UWMP or regional alliance.Plan preparation Chapter 2 – Plan Preparation; Table 2-2; Section 2.2 10644 Supplier shall report whether the data are in fiscal or calendar years and the units of measure used for reporting water volumes.Plan preparation Chapter 2 – Plan Preparation; Table 2-3; Section 2.2 10642 Provide supporting documentation that the Supplier has encouraged active involvement of diverse social, cultural, and economic elements of the population within the service area prior to and during the preparation of the plan and contingency plan. Plan preparation Chapter 2 – Plan Preparation; Section 2.3 10620(d)(3) Coordinate the preparation of its plan with other appropriate agencies in the area, including other Suppliers that share a common source, water management agencies, and relevant public agencies, to the extent practicable. Plan preparation Chapter 2 – Plan Preparation; Section 2.3 10631(h)Retail Suppliers will include documentation that they have provided their Wholesale Supplier(s)—if any—with water use projections from that source.Plan preparation Chapter 2 – Plan Preparation; Table 2-4; Section 2.3 10631(h) Wholesale Suppliers will provide their Suppliers with identification and quantification of the existing and planned sources of water available from the Wholesale Supplier to the Supplier during various water year types. Plan preparation N/A 10631(a)Describe the Supplier service area.System description Chapter 3 – Service Area Description; Section 3.1 10631(a)Describe the climate of the Supplier’s service area.System description Chapter 3 – Service Area Description; Section 3.4 10631(a)Provide the current and projected service area populations for 2030, 2035, 2040, 2045 and optionally 2050.System description Chapter 3 – Service Area Description; Table 3-1; Section 3.2 10631(a)Describe other social, economic, and demographic factors affecting the Supplier’s water management planning.System description Chapter 3 – Service Area Description; Section 3.2 10631(a) Describe the land uses within the service area… include the current and projected land uses within the existing or anticipated service area affecting the Supplier’s water management planning. Describe the land uses within the service area. System description and baselines Chapter 3 – Service Area Description; Section 3.3 10631(d)(1)Quantify past, current, and projected water use, identifying the uses among water use sectors.System water use Chapter 4 – Water Use Characterization; Sections 4.1, 4.2, 4.3; Tables 4-1, 4- 2, 4-3, 4-4, 4-5, 4-6, 4-7 10631(d)(3)(A)Report the distribution system water loss for each of the five years preceding the plan update.System water use Chapter 4 – Water Use Characterization; Section 4.4; Table 4-9 10631(d)(3)(C)Retail Suppliers shall provide data to show whether the distribution loss standards were met.System water use Chapter 4 – Water Use Characterization; Section 4.5; Table 4-10 10631.1(a)Include projected water use needed for lower income housing projected in the service area of the Supplier.System water use Chapter 4 – Water Use Characterization; Section 4.3.5 10631(d)(4)(A)In projected water use, include estimates of water savings from adopted codes, plans, and other policies or laws.System water use Chapter 4 – Water Use Characterization; Section 4.3.4; Table 4-8 10631(d)(4)(B)Provide citations of codes, standards, ordinances, or plans used to make water use projections.System water use Chapter 4 – Water Use Characterization; Section 4.3 10631(d)(4)(B)(ii) To the extent that a Supplier reports the information described in subparagraph (A), an urban water Supplier shall… Indicate the extent that the water use projections consider savings from codes, standards, ordinances, or transportation and land use plans. Water use projections that do not account for these water savings shall be noted of that fact. System water use Chapter 4 – Water Use Characterization; Section 4.3.4; Table 4-8 10635(b)Demands under climate change considerations must be included as part of the drought risk assessment.System water use Chapter 4 – Water Use Characterization; Section 4.3.3 10608.36 Wholesale Suppliers shall include an assessment of present and proposed future measures, programs, and policies to help their Retail Suppliers achieve targeted water use reductions. Baselines and targets N/A 10608.4 Retail Suppliers shall report on their compliance in meeting their water use targets. Reporting requirements will vary depending on whether the Supplier: - Was considered an urban retail water supplier in 2020, - Met its 2020 target in 2020, or - Was part of a merger or consolidation since 2020. Chapter 5 Subsections 5.2.1, 5.2.2, and 5.2.3 address each of these situations. Baselines and targets Chapter 5 – SB X7-7 Targets and Reporting; Table 5-1 DWR 2025 UWMP Checklist Water Code Section Summary as Applies to UWMP Subject 2025 UWMP Location 10631(b)(2)When multiple sources of water supply are identified, describe the management of each supply in relationship to other identified supplies.System supplies Chapter 6 – Normal-Year Water Supply Characterization; Section 6.1 10631(b)(1) Provide a discussion of anticipated supply availability under a normal, single dry year, and a drought lasting five years, as well as more frequent and severe periods of drought, including changes in supply due to climate change. System supplies Chapter 6 – Normal-Year Water Supply Characterization; Chapter 7- Water Service Reliability and Drought Risk Assessment; Section 6.3 - Climate Change Impacts to Supply 10631(b)(4)(C) Indicate whether groundwater is an existing or planned source of water available to the Supplier. If groundwater is identified as an existing or planned source of water… (include) a detailed description and analysis of the location, amount and sufficiency of groundwater pumped by the Supplier for the past five years. Water supplies and recycled water Chapter 6 – Normal-Year Water Supply Characterization; Section 6.1.2; Table 6-1 10631(b)(4)(A) Indicate whether a groundwater sustainability plan or groundwater management plan has been adopted by the Supplier or if there is any other specific authorization for groundwater management. Include a copy of the plan or authorization. System supplies Section 6.1.2; Section 6.1.4.2; n/a 10631(b)(4)(B)Describe the groundwater basin.System supplies Section 6.1.2; Section 6.1.4.2 10631(b)(4)(B) Indicate if the basin has been adjudicated and include a copy of the court order or decree and a description of the amount of water the Supplier has the legal right to pump. System supplies Section 6.1.2; Section 6.1.4.2; n/a 10631(b)(4)(B) For unadjudicated basins… (include) information as to whether DWR has identified the basin as a high- or medium-priority basin in the most current official departmental bulletin… Water supplies and recycled water Section 6.1.2; Section 6.1.4.2; n/a 10631(b)(4)(B) For unadjudicated basins… describe efforts by the Supplier to coordinate with sustainability or groundwater agencies to achieve sustainable groundwater conditions. Water supplies and recycled water Section 6.1.2; Section 6.1.4.2; n/a 10631(b)(4)(C) If groundwater is identified as an existing or planned source of water… (include) a detailed description and analysis of the location, amount and sufficiency of groundwater pumped by the Supplier for the past five years. System supplies Section 6.1.2; Section 6.1.4.2; n/a 10631(b)(4)(D)Provide a detailed description and analysis of the amount and location of groundwater that is projected to be pumped.System supplies Section 6.1.2; Section 6.1.4.2; n/a 10631(b)Identify and quantify the existing and planned sources of water available for 2025, 2030, 2035, 2040, 2045 and optionally 2050.System supplies Chapter 6 – Normal-Year Water Supply Characterization; Section 6.2; Table 6-8; Table 6-9 10631(c)Describe the opportunities for exchanges or transfers of water on a short-term or long-term basis.System supplies Chapter 6 – Normal-Year Water Supply Characterization; Section 6.1.1 10633(a)Describe the wastewater collection and treatment systems in the Supplier’s service area with quantified amount of collection and treatment and the disposal methods. System supplies (recycled water) Chapter 6 – Normal-Year Water Supply Characterization; Section 6.1.3.2; Table 6-2 10633(b)Describe the quantity of treated wastewater that meets recycled water standards, is being discharged, and is otherwise available for use in a recycled water project. System supplies (recycled water) Chapter 6 – Normal-Year Water Supply Characterization; Table 6- 3; Section 6.1.3.2 10633(c)Describe the recycled water currently being used in the Supplier's service area.System supplies (recycled water) Chapter 6 – Normal-Year Water Supply Characterization; Section 6.1.3.4; Table 6-5 10633(d)Describe and quantify the potential uses of recycled water and provide a determination of the technical and economic feasibility of those uses. System supplies (recycled water) Chapter 6 – Normal-Year Water Supply Characterization; Section 6.1.3.4; Table 6-5 10633(e) Describe the projected use of recycled water within the Supplier's service area at the end of 5, 10, 15, and 20 years, and describe the actual use of recycled water in comparison to uses previously projected. System supplies (recycled water) Chapter 6 – Normal-Year Water Supply Characterization; Section 6.1.3.4; Table 6-5; Table 6- 6 10633(f) Describe the actions that may be taken to encourage the use of recycled water and the projected results of these actions in terms of acre-feet of recycled water used per year. System supplies (recycled water) Chapter 6 – Normal-Year Water Supply Characterization; Section 6.1.3.5; Table 6-7; Appendix H 10633(g)Provide a plan for optimizing the use of recycled water in the Supplier's service area. System supplies (recycled water) Chapter 6 – Normal-Year Water Supply Characterization; Section 6.1.3 10631(g)Describe desalinated water project opportunities for long-term supply.System supplies Chapter 6 – Normal-Year Water Supply Characterization; Section 6.1.4 10631(f) Describe the expected future water supply projects and programs that may be undertaken by the water Supplier to address water supply reliability in average, single-dry, and for a period of drought lasting five consecutive water years. System supplies Chapter 6 – Normal-Year Water Supply Characterization; Section 6.1.4 DWR 2025 UWMP Checklist Water Code Section Summary as Applies to UWMP Subject 2025 UWMP Location 10631.2(a)The UWMP must include energy information, as stated in the code, that a Supplier can readily obtain. System suppliers, energy intensity Chapter 6 – Normal-Year Water Supply Characterization; Section 6.4 10634 Provide information on the quality of existing sources of water available to the Supplier and the manner in which water quality affects water management strategies and supply reliability. Water supply reliability assessment Chapter 7 – Water Service Reliability and Drought Risk Assessment; Section 7.1; Appendix F 10635(a) Service Reliability Assessment: Assess the water supply reliability during normal, dry, and a drought lasting five consecutive water years by comparing the total water supply sources available to the Supplier with the total projected water use over the next 20 years. Water supply reliability assessment Chapter 7 – Water Service Reliability and Drought Risk Assessment; Sections 7.2, 7.3, 7.4; Tables 7-2, 7- 3, 7-4 10620(f)Describe water management tools and options to maximize resources and minimize the need to import water from other regions. Water supply reliability assessment Chapter 7 – Water Service Reliability and Drought Risk Assessment; Chapter 8 - Water Shortage Contingency Plan; Chapter 9 - Demand Management Measures; Appendix G; Appendix H 10635(b)Provide a drought risk assessment as part of information considered in developing the demand management measures and water supply projects. Water supply reliability assessment Chapter 7 – Water Service Reliability and Drought Risk Assessment; Section 7.5; Appendix G 10635(b)(1) Include a description of the data, methodology, and basis for one or more supply shortage conditions that are necessary to conduct a drought risk assessment for a drought period that lasts five consecutive years. Water supply reliability assessment Chapter 8- Water Shortage Contingency Plan; Section 8.3; Appendix G; Appendix H 10635(b)(2)Include a determination of the reliability of each source of supply under a variety of water shortage conditions. Water supply reliability assessment Chapter 7 – Water Service Reliability and Drought Risk Assessment; Section 7.1; Appendix F 10635(b)(3)Include a comparison of the total water supply sources available to the Supplier with the total projected water use for the drought period. Water supply reliability assessment Chapter 7 – Water Service Reliability and Drought Risk Assessment; Section 7.5; Table 7-5 10635(b)(4) Include considerations of the historical drought hydrology, plausible changes on projected supplies and demands under climate change conditions, anticipated regulatory changes, and other locally applicable criteria. Water supply reliability assessment Chapter 7 – Water Service Reliability and Drought Risk Assessment; Section 7.1; Appendix F 10632(a)Provide a water shortage contingency plan (WSCP) with specified elements below.Water shortage contingency planning Chapter 8 – Water Shortage Contingency Plan (Appendix H); Appendix H 10632(a)(1)Provide an analysis of water supply reliability (from Guidebook Chapter 7) in the WSCP. Water shortage contingency planning Chapter 8 – Water Shortage Contingency Plan; Appendix H, Section 1 10632(a)(2)(A)Provide the written decision-making process and other methods that the Supplier will use each year to determine its water reliability. Water shortage contingency planning Chapter 8 – Water Shortage Contingency Plan; Appendix H, Section 2.1 10632(a)(2)(B)Provide data and methodology to evaluate the Supplier’s water reliability for the current year and one dry year pursuant to factors in the code. Water shortage contingency planning Chapter 8 – Water Shortage Contingency Plan; Appendix H, Section 2.2 10632(a)(3)(A) Define six standard water shortage levels of 10%, 20%, 30%, 40%, 50% shortage, and greater than 50% shortage. These levels shall be based on supply conditions, including percent reductions in supply, changes in groundwater levels, changes in surface elevation, or other conditions. The shortage levels shall also apply to a catastrophic interruption of supply. Water shortage contingency planning Chapter 8 – Water Shortage Contingency Plan; Appendix H, Section 3 10632(a)(3)(B)Suppliers with an existing WSCP that uses different water shortage levels must cross reference their categories with the six standard categories. Water shortage contingency planning N/A 10632(a)(4)(A)Suppliers with WSCPs that align with the defined shortage levels must specify locally appropriate supply augmentation actions. Water shortage contingency planning Chapter 8 – Water Shortage Contingency Plan; Appendix H, Section 4.1, Table 2 10632(a)(4)(B)Specify locally appropriate demand reduction actions to adequately respond to shortages. Water shortage contingency planning Chapter 8 – Water Shortage Contingency Plan; Appendix H, Section 4.2, Table 3 10632(a)(4)(C)Specify locally appropriate operational changes.Water shortage contingency planning Chapter 8 – Water Shortage Contingency Plan; Appendix H, Section 4.3, Table 3 DWR 2025 UWMP Checklist Water Code Section Summary as Applies to UWMP Subject 2025 UWMP Location 10632(a)(4)(D)Specify additional mandatory prohibitions against specific water use practices that are in addition to State-mandated prohibitions are appropriate to local conditions. Water shortage contingency planning Chapter 8 – Water Shortage Contingency Plan; Appendix H, Section 4.4, Table 3 10632(a)(4)(E)Estimate the extent to which the gap between supplies and demand will be reduced by implementation of the action. Water shortage contingency planning Chapter 8 – Water Shortage Contingency Plan; Appendix H, Section 4.7, Table 2, Table 3 10632.5 The UWMP shall include a seismic risk assessment and mitigation plan.Water shortage contingency plan Chapter 8 – Water Shortage Contingency Plan; Appendix H, Section 4.6 10632(a)(5)(A)Suppliers must describe that they will inform customers, the public and others regarding any current or predicted water shortages. Water shortage contingency planning Chapter 8 – Water Shortage Contingency Plan; Appendix H, Section 5 10632(a)(5)(B), 10632(a)(5)(C) Suppliers must describe that they will inform customers, the public and others regarding any shortage response actions triggered or anticipated to be triggered and other relevant communications. Water shortage contingency planning Chapter 8 – Water Shortage Contingency Plan; Appendix H, Section 5 10632(a)(6)Retail Supplier must describe how it will ensure compliance with and enforce provisions of the WSCP. Water shortage contingency planning Chapter 8 – Water Shortage Contingency Plan; Appendix H, Section 6 10632(a)(7)(A)Describe the legal authority that empowers the Supplier to enforce shortage response actions. Water shortage contingency planning Chapter 8 – Water Shortage Contingency Plan; Appendix H, Section 7 10632(a)(7)(B)Provide a statement that the Supplier will declare a water shortage emergency per Water Code Chapter 3. Water Shortage Emergencies . Water shortage contingency planning Chapter 8 – Water Shortage Contingency Plan; Appendix H, Section 7 10632(a)(7)(C)Provide a statement that the Supplier will coordinate with any city or county within which it provides water for the possible proclamation of a local emergency. Water shortage contingency planning Chapter 8 – Water Shortage Contingency Plan; Appendix H, Section 7 10632(a)(8)(A)Describe the potential revenue reductions and expense increases associated with activated shortage response actions. Water shortage contingency planning Chapter 8 – Water Shortage Contingency Plan; Appendix H, Section 8 10632(a)(8)(B)Provide a description of mitigation actions needed to address revenue reductions and expense increases associated with activated shortage response actions. Water shortage contingency planning Chapter 8 – Water Shortage Contingency Plan; Appendix H, Section 8 10632(a)(8)(C)Retail Suppliers must describe the cost of compliance with Water Code Chapter 3.3, Excessive Residential Water Use During Drought. Water shortage contingency planning Chapter 8 – Water Shortage Contingency Plan; Appendix H, Section 8 10632(a)(9) Retail Suppliers must describe the monitoring and reporting requirements and procedures that ensure appropriate data are collected, tracked, and analyzed for purposes of monitoring customer compliance. Water shortage contingency planning Chapter 8 – Water Shortage Contingency Plan; Appendix H, Section 9 10632(a)(10) Describe reevaluation and improvement procedures for monitoring and evaluation the WSCP to ensure risk tolerance is adequate and appropriate water shortage mitigation strategies are implemented. Water shortage contingency planning Chapter 8 – Water Shortage Contingency Plan; Appendix H, Section 10 10632(b)Analyze and define water features that are artificially supplied with water, including ponds, lakes, waterfalls, and fountains, separately from swimming pools and spas. Water shortage contingency planning Chapter 8 – Water Shortage Contingency Plan; Appendix H, Section 11 10632(c)Make available the WSCP to customers and any city or county where it provides water within 30 days after adoption of the plan. Water shortage contingency planning Chapter 8 – Water Shortage Contingency Plan; Appendix H, Section 12 10631(e)(1) Retail Suppliers shall provide a description of the nature and extent of each demand management measure implemented over the past five years. The description will address specific measures listed in code. Demand management measures Chapter 9 – Demand Management Measures; Sections 9.1 and 9.2 10631(e)(2) Wholesale Suppliers shall describe specific demand management measures listed in code, their distribution system asset management program, and Supplier assistance program. Demand management measures N/A 10608.26(a)Retail Suppliers shall conduct a public hearing to discuss adoption, implementation, and economic impact of water use targets (recommended to discuss compliance). Plan adoption, submittal, and implementation Chapter 10 – Plan Adoption, Submittal, and Implementation; Section 10.1 10621(b) Notify, at least 60 days prior to the public hearing, any city or county within which the Supplier provides water that the Supplier will be reviewing the UWMP and considering amendments or changes to the plan. Plan adoption, submittal, and implementation Chapter 10 – Plan Adoption, Submittal, and Implementation; Table 10- 1; Appendix B 10621(f)Each urban water Supplier shall update and submit its 2025 plan to DWR by July 1, 2026. Plan adoption, submittal, and implementation Chapter 10 – Plan Adoption, Submittal, and Implementation; Section 10.2 DWR 2025 UWMP Checklist Water Code Section Summary as Applies to UWMP Subject 2025 UWMP Location 10642 Provide supporting documentation that the Supplier made the UWMP and WSCP available for public inspection, published notice of the public hearing, and held a public hearing about the UWMP and WSCP. Plan adoption, submittal, and implementation Chapter 10 – Plan Adoption, Submittal, and Implementation; Appendix B 10642 The Supplier is to provide the time and place of the hearing to any city or county within which the Supplier provides water. Plan adoption, submittal, and implementation Chapter 10 – Plan Adoption, Submittal, and Implementation; Table 10- 1; Appendix B 10642 Provide supporting documentation that the UWMP and WSCP has been adopted as prepared or modified. Plan adoption, submittal, and implementation Chapter 10 – Plan Adoption, Submittal, and Implementation; Appendix B 10644(a)Provide supporting documentation that the Supplier has submitted their UWMP to the California State Library. Plan adoption, submittal, and implementation Chapter 10 – Plan Adoption, Submittal, and Implementation; Appendix B 10644(a)(1) Provide supporting documentation that the Supplier has submitted their UWMP to any city or county within which the Supplier provides water no later than 30 days after adoption. Plan adoption, submittal, and implementation Chapter 10 – Plan Adoption, Submittal, and Implementation; Appendix B 10644(a)(2)The UWMP, or amendments to the UWMP, submitted to DWR shall be submitted electronically. Plan adoption, submittal, and implementation Chapter 10 – Plan Adoption, Submittal, and Implementation; Chapter 10 10644(b)If revised, submit a copy of the WSCP to DWR within 30 days of adoption.Plan adoption, submittal, and implementation Chapter 10 – Plan Adoption, Submittal, and Implementation; Appendix G 10645(a) Provide supporting documentation that, not later than 30 days after filing a copy of its UWMP with DWR, the Supplier has or will make the plan available for public review during normal business hours. Plan adoption, submittal, and implementation Chapter 10 – Plan Adoption, Submittal, and Implementation; Appendix B 10645(b) Provide supporting documentation that, not later than 30 days after filing a copy of its WSCP with DWR, the Supplier has or will make the plan available for public review during normal business hours. Plan adoption, submittal, and implementation Chapter 10 – Plan Adoption, Submittal, and Implementation; Appendix B 10621(c)If Supplier is regulated by the Public Utilities Commission, include its plan and contingency plan as part of its general rate case filings. Plan adoption, submittal, and implementation N/A Otay Water District 2025 Urban Water Management Plan June 2026 APPENDIX D: AWWA WATER LOSS WORKSHEETS Water Audit Report for: Reporting Year: All volumes to be entered as: ACRE-FEET PER YEAR Master Meter and Supply Error Adjustments WATER SUPPLIED Pcnt: Value: Volume from own sources:n/a 0.000 acre-ft/yr 2.58%acre-ft/yr Water imported:7 29,103.500 acre-ft/yr 8 acre-ft/yr Water exported:7 1,564.800 acre-ft/yr n/a acre-ft/yr Enter negative % or value for under-registration WATER SUPPLIED:27,447.940 acre-ft/yr Enter positive % or value for over-registration . AUTHORIZED CONSUMPTION Billed metered:7 26,156.200 acre-ft/yr Billed unmetered:10 17.180 acre-ft/yr Unbilled metered:8 52.650 acre-ft/yr Pcnt: Value: Unbilled unmetered:10 110.440 acre-ft/yr 1.25%acre-ft/yr AUTHORIZED CONSUMPTION:26,336.470 acre-ft/yr WATER LOSSES (Water Supplied - Authorized Consumption)1,111.470 acre-ft/yr Apparent Losses Pcnt: Value: Unauthorized consumption: 68.620 acre-ft/yr 0.25%acre-ft/yr Customer metering inaccuracies:7 198.052 acre-ft/yr 0.75%acre-ft/yr Systematic data handling errors: 65.391 acre-ft/yr 0.25%acre-ft/yr Apparent Losses:332.062 acre-ft/yr Real Losses (Current Annual Real Losses or CARL) Real Losses = Water Losses - Apparent Losses:779.408 acre-ft/yr WATER LOSSES:1,111.470 acre-ft/yr NON-REVENUE WATER NON-REVENUE WATER:1,274.560 acre-ft/yr = Water Losses + Unbilled Metered + Unbilled Unmetered SYSTEM DATA Length of mains:10 757.6 miles Number of active AND inactive service connections:9 52,680 Service connection density: 70 conn./mile main Yes Average length of customer service line:ft Average operating pressure:6 116.1 psi COST DATA Total annual cost of operating water system:10 $39,210,448 $/Year Customer retail unit cost (applied to Apparent Losses):10 $4.40 Variable production cost (applied to Real Losses):7 $1,802.99 $/acre-ft WATER AUDIT DATA VALIDITY SCORE: PRIORITY AREAS FOR ATTENTION: 1: Water imported 2: Billed metered 3: Unauthorized consumption AWWA Free Water Audit Software: Reporting Worksheet 110.440 2020 7/2019 - 6/2020 Otay Water District (3710034) <----------- Enter grading in column 'E' and 'J' ----------> -90.760 90.760 Based on the information provided, audit accuracy can be improved by addressing the following components: $/100 cubic feet (ccf) Default option selected for unauthorized consumption - a grading of 5 is applied but not displayed 1,918.560 *** YOUR SCORE IS: 76 out of 100 *** A weighted scale for the components of consumption and water loss is included in the calculation of the Water Audit Data Validity Score Default option selected for Systematic data handling errors - a grading of 5 is applied but not displayed Average length of customer service line has been set to zero and a data grading score of 10 has been applied Are customer meters typically located at the curbstop or property line? ? ? ? ? ? ?Click to access definition ? ? ? ? ? ? Please enter data in the white cells below. Where available, metered values should be used; if metered values are unavailable please estimate a value. Indicate your confidence in the accuracy of the input data by grading each component (n/a or 1-10) using the drop-down list to the left of the input cell. Hover the mouse over the cell to obtain a description of the grades ? ? ? ? ? ? (length of service line, beyond the property boundary, that is the responsibility of the utility) Use buttons to selectpercentage of water supplied ORvalue ?Click here: for help using option buttons below ? ? ? ? + +Click to add a comment WAS v5.0 + + + + + + American Water Works Association. Copyright © 2014, All Rights Reserved. ? ? ? + + + + + + + + + + + + +Use Customer Retail Unit Cost to value real losses ? To select the correct data grading for each input, determine the highest grade where the utility meets or exceeds all criteria for that grade and all grades below it. AWWA Free Water Audit Software v5.0 Reporting Worksheet 1 Water Audit Report for: Reporting Year: All volumes to be entered as: ACRE-FEET PER YEAR Master Meter and Supply Error Adjustments WATER SUPPLIED Pcnt: Value: Volume from own sources:n/a 0.000 acre-ft/yr 2.58%acre-ft/yr Water imported:7 31,647.400 acre-ft/yr 8 acre-ft/yr Water exported:7 1,621.970 acre-ft/yr n/a acre-ft/yr Enter negative % or value for under-registration WATER SUPPLIED:30,094.360 acre-ft/yr Enter positive % or value for over-registration . AUTHORIZED CONSUMPTION Billed metered:7 28,932.100 acre-ft/yr Billed unmetered:10 10.920 acre-ft/yr Unbilled metered:8 95.700 acre-ft/yr Pcnt: Value: Unbilled unmetered:10 68.970 acre-ft/yr 1.25%acre-ft/yr AUTHORIZED CONSUMPTION:29,107.690 acre-ft/yr WATER LOSSES (Water Supplied - Authorized Consumption)986.670 acre-ft/yr Apparent Losses Pcnt: Value: Unauthorized consumption: 75.236 acre-ft/yr 0.25%acre-ft/yr Customer metering inaccuracies:7 219.354 acre-ft/yr 0.75%acre-ft/yr Systematic data handling errors: 72.330 acre-ft/yr 0.25%acre-ft/yr Apparent Losses:366.920 acre-ft/yr Real Losses (Current Annual Real Losses or CARL) Real Losses = Water Losses - Apparent Losses:619.750 acre-ft/yr WATER LOSSES:986.670 acre-ft/yr NON-REVENUE WATER NON-REVENUE WATER:1,151.340 acre-ft/yr = Water Losses + Unbilled Metered + Unbilled Unmetered SYSTEM DATA Length of mains:10 773.3 miles Number of active AND inactive service connections:9 52,749 Service connection density: 68 conn./mile main Yes Average length of customer service line:ft Average operating pressure:6 116.1 psi COST DATA Total annual cost of operating water system:10 $36,878,296 $/Year Customer retail unit cost (applied to Apparent Losses):10 $4.65 Variable production cost (applied to Real Losses):7 $1,820.37 $/acre-ft WATER AUDIT DATA VALIDITY SCORE: PRIORITY AREAS FOR ATTENTION: 1: Water imported 2: Billed metered 3: Unauthorized consumption AWWA Free Water Audit Software: Reporting Worksheet 68.970 2021 7/2020 - 6/2021 Otay Water District (3710034) <----------- Enter grading in column 'E' and 'J' ----------> -68.930 -68.930 Based on the information provided, audit accuracy can be improved by addressing the following components: $/100 cubic feet (ccf) Default option selected for unauthorized consumption - a grading of 5 is applied but not displayed 1,918.560 *** YOUR SCORE IS: 76 out of 100 *** A weighted scale for the components of consumption and water loss is included in the calculation of the Water Audit Data Validity Score Default option selected for Systematic data handling errors - a grading of 5 is applied but not displayed Average length of customer service line has been set to zero and a data grading score of 10 has been applied Are customer meters typically located at the curbstop or property line? ? ? ? ? ? ?Click to access definition ? ? ? ? ? ? Please enter data in the white cells below. Where available, metered values should be used; if metered values are unavailable please estimate a value. Indicate your confidence in the accuracy of the input data by grading each component (n/a or 1-10) using the drop-down list to the left of the input cell. Hover the mouse over the cell to obtain a description of the grades ? ? ? ? ? ? (length of service line, beyond the property boundary, that is the responsibility of the utility) Use buttons to selectpercentage of water supplied ORvalue ?Click here: for help using option buttons below ? ? ? ? + +Click to add a comment WAS v5.0 + + + + + + American Water Works Association. Copyright © 2014, All Rights Reserved. ? ? ? + + + + + + + + + + + + +Use Customer Retail Unit Cost to value real losses ? To select the correct data grading for each input, determine the highest grade where the utility meets or exceeds all criteria for that grade and all grades below it. AWWA Free Water Audit Software v5.0 Reporting Worksheet 1 Water Audit Report for: Reporting Year: All volumes to be entered as: ACRE-FEET PER YEAR Master Meter and Supply Error Adjustments WATER SUPPLIED Pcnt: Value: Volume from own sources:n/a 0.000 acre-ft/yr 2.58%acre-ft/yr Water imported:7 29,763.500 acre-ft/yr 8 acre-ft/yr Water exported:3 133.600 acre-ft/yr 3 acre-ft/yr Enter negative % or value for under-registration WATER SUPPLIED:29,639.740 acre-ft/yr Enter positive % or value for over-registration . AUTHORIZED CONSUMPTION Billed metered:7 28,252.950 acre-ft/yr Billed unmetered:10 15.440 acre-ft/yr Unbilled metered:8 9.690 acre-ft/yr Pcnt: Value: Unbilled unmetered:10 55.910 acre-ft/yr 1.25%acre-ft/yr AUTHORIZED CONSUMPTION:28,333.990 acre-ft/yr WATER LOSSES (Water Supplied - Authorized Consumption)1,305.750 acre-ft/yr Apparent Losses Pcnt: Value: Unauthorized consumption:5 74.099 acre-ft/yr 0.25%acre-ft/yr Customer metering inaccuracies:7 213.572 acre-ft/yr 0.75%acre-ft/yr Systematic data handling errors: 70.632 acre-ft/yr 0.25%acre-ft/yr Apparent Losses:358.303 acre-ft/yr Real Losses (Current Annual Real Losses or CARL) Real Losses = Water Losses - Apparent Losses:947.447 acre-ft/yr WATER LOSSES:1,305.750 acre-ft/yr NON-REVENUE WATER NON-REVENUE WATER:1,371.350 acre-ft/yr = Water Losses + Unbilled Metered + Unbilled Unmetered SYSTEM DATA Length of mains:10 778.1 miles Number of active AND inactive service connections:9 53,251 Service connection density: 68 conn./mile main Yes Average length of customer service line:ft Average operating pressure:5 116.1 psi COST DATA Total annual cost of operating water system:10 $33,868,000 $/Year Customer retail unit cost (applied to Apparent Losses):10 $4.70 Variable production cost (applied to Real Losses):7 $1,937.01 $/acre-ft WATER AUDIT DATA VALIDITY SCORE: PRIORITY AREAS FOR ATTENTION: 1: Water imported 2: Billed metered 3: Unauthorized consumption AWWA Free Water Audit Software: Reporting Worksheet 55.910 2022 7/2021 - 6/2022 Otay Water District (CA3710034) <----------- Enter grading in column 'E' and 'J' ----------> -9.840 -9.840 Based on the information provided, audit accuracy can be improved by addressing the following components: $/100 cubic feet (ccf) Default option selected for unauthorized consumption - a grading of 5 is applied but not displayed 1,918.560 *** YOUR SCORE IS: 76 out of 100 *** A weighted scale for the components of consumption and water loss is included in the calculation of the Water Audit Data Validity Score Default option selected for Systematic data handling errors - a grading of 5 is applied but not displayed Average length of customer service line has been set to zero and a data grading score of 10 has been applied Are customer meters typically located at the curbstop or property line? ? ? ? ? ? ?Click to access definition ? ? ? ? ? ? Please enter data in the white cells below. Where available, metered values should be used; if metered values are unavailable please estimate a value. Indicate your confidence in the accuracy of the input data by grading each component (n/a or 1-10) using the drop-down list to the left of the input cell. Hover the mouse over the cell to obtain a description of the grades ? ? ? ? ? ? (length of service line, beyond the property boundary, that is the responsibility of the utility) Use buttons to selectpercentage of water supplied ORvalue ?Click here: for help using option buttons below ? ? ? ? + +Click to add a comment WAS v5.0 + + + + + + American Water Works Association. Copyright © 2014, All Rights Reserved. ? ? ? + + + + + + + + + + + + +Use Customer Retail Unit Cost to value real losses ? To select the correct data grading for each input, determine the highest grade where the utility meets or exceeds all criteria for that grade and all grades below it. AWWA Free Water Audit Software v5.0 Reporting Worksheet 1 Water Audit Report for: Audit Year: All volumes to be entered as: ACRE-FEET PER YEAR WATER SUPPLIED choose entry option: VOS Volume from Own Sources:n g Acre-ft/Yr n g volume acre-ft/yr under-registration VOSEA WI Water Imported:n g 7 30,807.300 Acre-ft/Yr n g 9 8.00%volume acre-ft/yr over-registration WIEA WE Water Exported:n g 7 3,927.670 Acre-ft/Yr n g 3 percent acre-ft/yr select…..WEEA 26,869.830 Acre-ft/Yr . AUTHORIZED CONSUMPTION BMAC Billed Metered:n g 9 25,652.100 Acre-ft/Yr BUAC Billed Unmetered:n g 10 9.190 Acre-ft/Yr UMAC Unbilled Metered:n g 8 25.530 Acre-ft/Yr choose entry option: UUAC Unbilled Unmetered:n g 10 30.848 Acre-ft/Yr 0.25%custom acre-ft/yr 25,717.668 Acre-ft/Yr WATER LOSSES 1,152.162 Acre-ft/Yr Apparent Losses Default option selected for Systematic Data Handling Errors, with automatic data grading of 3 choose entry option: SDHE Systematic Data Handling Errors:n g 3 64.153 Acre-ft/Yr 0.25% default acre-ft/yr CMI Customer Metering Inaccuracies:n g 7 194.038 Acre-ft/Yr 0.75% percent acre-ft/yr under-registration UC Unauthorized Consumption:n g 3 64.153 Acre-ft/Yr 0.25% default acre-ft/yr Default option selected for Unauthorized Consumption, with automatic data grading of 3 322.344 Acre-ft/Yr Real Losses 829.818 Acre-ft/Yr 1,152.162 Acre-ft/Yr NON-REVENUE WATER 1,208.540 Acre-ft/Yr SYSTEM DATA Lm Length of mains:n g 10 783.1 miles (including fire hydrant lead lengths) Nc Number of service connections:n g 10 53,404 (active and inactive) Service connection density:68 conn./mile main Yes Lp Average length of (private) customer service line:n g 10 ft (average distance between property line and meter) AOP Average Operating Pressure:n g 8 116.0 psi COST DATA CRUC Customer Retail Unit Charge:n g 10 $5.21 VPC Variable Production Cost:n g 10 $2,126.16 $/acre-ft $/yr (optional input) WATER AUDIT DATA VALIDITY TIER: go to dashboard PRIORITY AREAS FOR ATTENTION TO IMPROVE DATA VALIDITY: KEY PERFORMANCE INDICATOR TARGETS: Based on the information provided, audit reliability can be most improved by addressing the following components: OPTIONAL: If targets exist for the operational performance indicators, they can be input below: 1: Water Imported (WI)Unit Total Losses: gal/conn/day 2: Unauthorized Consumption (UC)Unit Apparent Losses: 5.4 gal/conn/day 3: Systematic Data Handling Errors (SDHE)Unit Real LossesA:13.9 gal/conn/day Unit Real LossesB:gal/mile/day If entered above by user, targets will display on KPI gauges (see Dashboard) go to start page NON-REVENUE WATER: If entering an Error Adjustment, select under- or over- registration WATER SUPPLIED: AUTHORIZED CONSUMPTION: Apparent Losses: Average length of customer service line has been set to zero and a data grading of 10 has been applied A weighted scale for the components of supply, consumption and water loss is included in the calculation of the Water Audit Data Validity Score *** The Water Audit Data Validity Score is in Tier IV (71-90). See Dashboard tab for additional outputs. *** $/100 cubic feet (ccf) $41,869,900 Total Annual Operating Cost Are customer meters typically located at the curbstop/property line? AWWA Free Water Audit Software: Worksheet 30.848 Otay Water District 9.800 9.800 Jul 01 2022 - Jun 30 2023 Water Supplied Error Adjustments Fiscal2023 Real Losses: WATER LOSSES: Click 'g' to determine data validity grade Click 'n' to add notes FWAS v6.0 American Water Works Association. Copyright © 2020, All Rights Reserved. To access definitions, click the input name To edit water system info: AWWA Free Water Audit Software v6.0 Worksheet 1 Water Audit Report for: Audit Year: All volumes to be entered as: ACRE-FEET PER YEAR WATER SUPPLIED choose entry option: VOS Volume from Own Sources:n g Acre-ft/Yr n g volume acre-ft/yr under-registration VOSEA WI Water Imported:n g 7 29,059.760 Acre-ft/Yr n g 9 8.00%volume acre-ft/yr over-registration WIEA WE Water Exported:n g 7 1,610.830 Acre-ft/Yr n g 3 percent acre-ft/yr select…..WEEA 27,405.960 Acre-ft/Yr . AUTHORIZED CONSUMPTION BMAC Billed Metered:n g 8 25,871.710 Acre-ft/Yr BUAC Billed Unmetered:n g 10 32.640 Acre-ft/Yr UMAC Unbilled Metered:n g 8 11.750 Acre-ft/Yr choose entry option: UUAC Unbilled Unmetered:n g 10 28.380 Acre-ft/Yr 0.25%custom acre-ft/yr 25,944.480 Acre-ft/Yr WATER LOSSES 1,461.480 Acre-ft/Yr Apparent Losses Default option selected for Systematic Data Handling Errors, with automatic data grading of 3 choose entry option: SDHE Systematic Data Handling Errors:n g 3 64.761 Acre-ft/Yr 0.25% default acre-ft/yr CMI Customer Metering Inaccuracies:n g 6 195.593 Acre-ft/Yr 0.75% percent acre-ft/yr under-registration UC Unauthorized Consumption:n g 3 64.761 Acre-ft/Yr 0.25% default acre-ft/yr Default option selected for Unauthorized Consumption, with automatic data grading of 3 325.115 Acre-ft/Yr Real Losses 1,136.365 Acre-ft/Yr 1,461.480 Acre-ft/Yr NON-REVENUE WATER 1,501.610 Acre-ft/Yr SYSTEM DATA Lm Length of mains:n g 10 783.2 miles (including fire hydrant lead lengths) Nc Number of service connections:n g 10 53,408 (active and inactive) Service connection density:68 conn./mile main Yes Lp Average length of (private) customer service line:n g 10 ft (average distance between property line and meter) AOP Average Operating Pressure:n g 8 116.0 psi COST DATA CRUC Customer Retail Unit Charge:n g 10 $5.80 VPC Variable Production Cost:n g 10 $2,294.03 $/acre-ft $/yr (optional input) WATER AUDIT DATA VALIDITY TIER: go to dashboard PRIORITY AREAS FOR ATTENTION TO IMPROVE DATA VALIDITY: KEY PERFORMANCE INDICATOR TARGETS: Based on the information provided, audit reliability can be most improved by addressing the following components: OPTIONAL: If targets exist for the operational performance indicators, they can be input below: 1: Water Imported (WI)Unit Total Losses: gal/conn/day 2: Billed Metered (BMAC)Unit Apparent Losses: 5.4 gal/conn/day 3: Unauthorized Consumption (UC)Unit Real LossesA:19.7 gal/conn/day Unit Real LossesB:gal/mile/day If entered above by user, targets will display on KPI gauges (see Dashboard) go to start page NON-REVENUE WATER: If entering an Error Adjustment, select under- or over- registration WATER SUPPLIED: AUTHORIZED CONSUMPTION: Apparent Losses: Average length of customer service line has been set to zero and a data grading of 10 has been applied A weighted scale for the components of supply, consumption and water loss is included in the calculation of the Water Audit Data Validity Score *** The Water Audit Data Validity Score is in Tier IV (71-90). See Dashboard tab for additional outputs. *** $/100 cubic feet (ccf) $47,808,900 Total Annual Operating Cost Are customer meters typically located at the curbstop/property line? AWWA Free Water Audit Software: Worksheet 28.380 Otay Water District 42.970 42.970 Jul 01 2023 - Jun 30 2024 Water Supplied Error Adjustments Fiscal2024 Real Losses: WATER LOSSES: Click 'g' to determine data validity grade Click 'n' to add notes FWAS v6.0 American Water Works Association. Copyright © 2020, All Rights Reserved. To access definitions, click the input name To edit water system info: AWWA Free Water Audit Software v6.0 Worksheet 1 Water Audit Report for: Audit Year: All volumes to be entered as: ACRE-FEET PER YEAR WATER SUPPLIED choose entry option: VOS Volume from Own Sources:n g n/a Acre-ft/Yr n g n/a volume acre-ft/yr under-registration VOSEA WI Water Imported:n g 7 30,999.280 Acre-ft/Yr n g 9 8.00%volume acre-ft/yr under-registration WIEA WE Water Exported:n g 7 1,651.130 Acre-ft/Yr n g 9 percent acre-ft/yr select…..WEEA 29,403.910 Acre-ft/Yr . AUTHORIZED CONSUMPTION BMAC Billed Metered:n g 8 27,834.940 Acre-ft/Yr BUAC Billed Unmetered:n g 10 12.740 Acre-ft/Yr UMAC Unbilled Metered:n g 8 7.320 Acre-ft/Yr choose entry option: UUAC Unbilled Unmetered:n g 10 28.648 Acre-ft/Yr 0.25%custom acre-ft/yr 27,883.648 Acre-ft/Yr WATER LOSSES 1,520.262 Acre-ft/Yr Apparent Losses Default option selected for Systematic Data Handling Errors, with automatic data grading of 3 choose entry option: SDHE Systematic Data Handling Errors:n g 3 69.619 Acre-ft/Yr 0.25% default acre-ft/yr CMI Customer Metering Inaccuracies:n g 6 210.395 Acre-ft/Yr 0.75% percent acre-ft/yr under-registration UC Unauthorized Consumption:n g 3 69.619 Acre-ft/Yr 0.25% default acre-ft/yr Default option selected for Unauthorized Consumption, with automatic data grading of 3 349.633 Acre-ft/Yr Real Losses 1,170.629 Acre-ft/Yr 1,520.262 Acre-ft/Yr NON-REVENUE WATER 1,556.230 Acre-ft/Yr SYSTEM DATA Lm Length of mains:n g 10 785.1 miles (including fire hydrant lead lengths) Nc Number of service connections:n g 10 53,476 (active and inactive) Service connection density:68 conn./mile main Yes Lp Average length of (private) customer service line:n g 10 ft (average distance between property line and meter) AOP Average Operating Pressure:n g 8 116.0 psi COST DATA CRUC Customer Retail Unit Charge:n g 10 $6.19 VPC Variable Production Cost:n g 10 $2,547.15 $/acre-ft $/yr (optional input) WATER AUDIT DATA VALIDITY TIER: go to dashboard PRIORITY AREAS FOR ATTENTION TO IMPROVE DATA VALIDITY: KEY PERFORMANCE INDICATOR TARGETS: Based on the information provided, audit reliability can be most improved by addressing the following components: OPTIONAL: If targets exist for the operational performance indicators, they can be input below: 1: Water Imported (WI)Unit Total Losses: gal/conn/day 2: Billed Metered (BMAC)Unit Apparent Losses: 5.8 gal/conn/day 3: Unauthorized Consumption (UC)Unit Real LossesA:19.3 gal/conn/day Unit Real LossesB:gal/mile/day If entered above by user, targets will display on KPI gauges (see Dashboard) Are customer meters typically located at the curbstop/property line? AWWA Free Water Audit Software: Worksheet 28.648 Otay Water District 55.760 55.760 Jul 01 2024 - Jun 30 2025 Water Supplied Error Adjustments Fiscal2025 Real Losses: WATER LOSSES: Average length of customer service line has been set to zero and a data grading of 10 has been applied A weighted scale for the components of supply, consumption and water loss is included in the calculation of the Water Audit Data Validity Score *** The Water Audit Data Validity Score is in Tier IV (71-90). See Dashboard tab for additional outputs. *** $/100 cubic feet (ccf) $46,316,100 Total Annual Operating Cost go to start page NON-REVENUE WATER: If entering an Error Adjustment, select under- or over- registration WATER SUPPLIED: AUTHORIZED CONSUMPTION: Apparent Losses: Click 'g' to determine data validity grade Click 'n' to add notes FWAS v6.0 American Water Works Association. Copyright © 2020, All Rights Reserved. To access definitions, click the input name To edit water system info: AWWA Free Water Audit Software v6.0 Worksheet 1 Otay Water District 2025 Urban Water Management Plan June 2026 APPENDIX E: AGREEMENTS FOR WATER Agreement with City of San Diego for treated water from the Otay Water Treatment Plant Recycled Water Agreement between Otay Water District and the City of San Diego Agreement between San Diego County Water Authority and Helix Water District to implement the East County Regional Treated Water Improvement Program 21815555.19 1 RECYCLED WATER AGREEMENT (Otay Water District – City of San Diego) This Recycled Water Agreement (“Agreement”) is between Otay Water District (“Otay”), a water district organized pursuant to the Municipal Water Act of 1911, and the City of San Diego, a Municipal Corporation (“San Diego” or the “City”). Otay and San Diego are at times referred to herein collectively as the “Parties” or individually as a “Party.” A. San Diego owns and operates the South Bay Water Reclamation Plant (“SBWRP”), which produces tertiary-treated Recycled Water and makes it available for sale to third parties including Otay. B. Otay owns and operates an extensive network of Recycled Water systems, including but not limited to pipelines, tanks, water treatment facilities, and pump stations. C. Otay provides water service, including Recycled Water service, to its customers and has constructed facilities to transmit Recycled Water from the SBWRP (as well Otay’s own recycled water plant) to its service area. D. Both Otay and San Diego charge Recycled Water customers a unitary rate for Recycled Water. E. Otay and San Diego entered into an agreement dated October 20, 2003 (“2003 Agreement”) on file with the San Diego City Clerk as Document No. RR-298502, which expires June 30, 2026. The 2003 Agreement provides for San Diego’s sale of Recycled Water to Otay, including a take-or-pay provision for up to 6 MGD during the summer months. On or about May 30, 2017, Otay filed a legal action that became Riverside Superior Court Case No. RIC1804278 (“Action”) against San Diego related to the 2003 Agreement. This Agreement is entered into under a Settlement Agreement between the Parties in the Action and is intended to supersede the 2003 Agreement, and to become effective as of January 1, 2026. F. The Parties intend by this Agreement to establish the terms for San Diego’s continued supply and sale of Recycled Water to Otay, and for the use of certain Otay facilities by the City. The Parties intend under this Agreement to omit the take-or-pay requirements that existed under the 2003 Agreement, meaning that the City will not be obligated to provide Otay with any specific quantity of Recycled Water and Otay will not be obligated to purchase any specific quantity of Recycled Water; instead Otay would purchase water on a volumetric basis. G. Capitalized terms in this Agreement are either defined when they are first used, or are defined in Exhibit A, Definitions to this Agreement. The Parties therefore agree as follows: 1. Term: This Agreement is effective for all Recycled Water purchased by Otay from San Diego and billed on or after January 1, 2026 (“Effective Date”) until December 31, 2030. 21815555.19 2 2. Supply: 2.1 To the extent that the operations of the SBWRP allow, San Diego will supply Otay Recycled Water from the SBWRP, upon Otay’s request and at the flow rate designated by Otay, up to 6 million gallons per day (MGD). Otay will place orders for Recycled Water with San Diego, in accordance with the Standard Operating Procedures related to placing orders for Recycled Water agreed upon by San Diego and Otay. “Standard Operating Procedures” means the Parties’ established practices as of the Effective Date, and that the Parties will make a good faith effort to commit to writing on or before January 1, 2026. 2.2 While the City anticipates being able to continue to supply Otay with up to 6 MGD, failure to be able to do so will not be considered a breach of this Agreement. Otay may request in writing that San Diego provide Recycled Water at flow rates in excess of 6 MGD. The City shall respond to such request within 5 business days, however, if such response is not provided, the request shall be deemed denied. San Diego shall approve or deny the request in its sole discretion. 2.3 San Diego is in no way obligated to supply Otay with flow at a rate in excess of 6 MGD under any circumstances, and if City chooses to do so following a request from Otay, the City may cease providing water at a flow rate in excess of 6 MGD at any time in the City’s sole discretion. 3. Point of Delivery: San Diego shall convey Recycled Water to the Otay Recycled Water system at the “San Diego Meter” shown on Exhibit B. 4. Cost: Prevailing Commodity Rates, Meter Rates, Contract Rate: 4.1 Commodity Rate: Otay shall pay the City for all Recycled Water produced, made available, delivered, and sold by San Diego to Otay at San Diego’s then- current Adopted Prevailing Commodity Rate for Recycled Water, which is a unitary rate charged to all customers of the San Diego Recycled Water System. 4.2 Meter Rate: In addition to the Adopted Prevailing Commodity Rates, Otay shall pay the City at the current monthly Adopted Prevailing Meter Rate, based on the size of Otay’s meter. The City currently charges Otay based on the 10” Meter Rate, even though Otay’s meter is 30”, because the City does not have a 30” Meter Rate. 4.3 Notice of Proposed Rate Change: San Diego shall provide Otay with at least 60 days advance notice of any proposed increase to the Adopted Prevailing Commodity Rate or Adopted Prevailing Meter Rate for Recycled Water, along with an opportunity to provide comment within that 60-day advance notice period. However, failure to provide 60 days notice shall not relieve Otay of the obligation to pay for Recycled Water at a later- adopted rate. 4.4 Option for Wholesale or Contract Rate: The Parties shall meet and confer in good faith between January 1, 2028 and March 31, 2028 with respect to the potential for Otay to transition to a wholesale or contract rate for Recycled Water. 21815555.19 3 5. City’s Use of Otay’s Facilities (Wheeling): 5.1 Baseline Capacity: Within 45 days after the Effective Date, the City shall notify Otay of the volume of Recycled Water that the City transported to San Diego Customers through Otay Facilities during each of the 2022, 2023, and 2024 calendar years. The highest volume of those three years is the “Baseline Capacity Allocation.” 5.2 Transportation Charge: Each year, the City may use up to the Baseline Capacity Allocation in the Otay Facilities for transportation of Recycled Water to San Diego Customers at the rate of $81.59 per acre foot (the “Wheeling Rate”) multiplied by the Annual Transported Amount (defined in Section 5.4) (“Otay Transportation Charge”). The Wheeling Rate will increase annually by the same percentage increase for the recycled water system revenue requirement that Otay uses in setting its rates for retail recycled water customers. 5.3 Meter Charge: San Diego shall pay to Otay a “Meter Charge” based on Otay’s adopted Meter Rates for the same size meter that the City charges Otay, which is currently the City’s 10” meter rate (i.e. Otay will pay the City’s Adopted Meter Rate for a 10” meter and the City will pay Otay’s fixed Publicly Owned Recycled Irrigation Monthly System Fees for a 10” meter). 5.4 Reporting & Payment: On or before February 15 of each year, the City shall report to Otay the verifiable volume of Recycled Water transported through Otay Facilities to San Diego Customers (“Annual Transported Amount”) during the prior calendar year. If the City fails to timely report, then Otay will estimate the City’s Annual Transported Amount using the information provided under Section 6.2(D) of this Agreement and bill on that basis, and San Diego shall pay based on that estimate. Otay shall generate an invoice (based on the City’s reported volumes or, in its absence, the District’s estimate of the City’s use) and forward it to the City, reflecting the following charges: (a) the Meter Charge, and (b) the Otay Transportation Charge in the amount of the Wheeling Rate multiplied by the Annual Transported Amount. The City shall pay the invoice within 30 days of receipt. If the City alleges that the invoice contains an error, including errors used to calculate any estimate, the City shall notify Otay in writing within 10 days. The City shall pay a 10% annual interest on any amounts not paid within 30 days of City’s receipt of the invoice, or within 30 days of the correction of any incorrect invoices. Otay may audit the usage amounts and the City shall provide all information Otay deems necessary to perform such an audit as provided in Section 11.1, below. 5.5 Capacity: While Otay anticipates being able to provide transportation for Recycled Water to the existing San Diego Customers, as provided in this Agreement, Otay’s inability to provide such transportation will not be considered a breach of the Agreement. Otay cannot guarantee capacity for San Diego Customers in Otay Facilities, nor can it guarantee additional capacity beyond the Baseline Capacity Allocation, however, Otay will not enter into future agreements that would interfere with the City’s ability to utilize the Baseline Capacity Allocation. City may request in writing that Otay allow use beyond the Baseline Capacity Allocation. Otay shall respond to such request within 5 business days, 21815555.19 4 however, if such response is not provided, the request shall be deemed denied. Otay shall approve or deny the request in its sole discretion. 5.6 Otay-Produced Water: If Otay provides standby potable water or Recycled Water to the City (including to the Otay Reservoir) due to an Interruption in Service that is not caused by Otay or the result of a problem at an Otay facility or equipment, then Otay shall invoice San Diego and San Diego shall pay Otay for that potable water or Recycled Water, at the then-existing variable Otay rates for publicly owned irrigation water rates or the recycled publicly owned irrigation water rates, as appropriate, based on whether potable or Recycled Water was used for any Otay standby water that was provided to San Diego Customers, as measured by the Otay Meter. 6. Meters 6.1 Functioning of Meters: A. At the Point of Delivery, San Diego shall maintain a measuring system for reading the quantity of Recycled Water delivered to Otay at the San Diego Meter. B. Otay shall maintain a measuring system to read the quantity of Recycled Water delivered to San Diego Customers at the Otay Meter. C. Both Parties shall maintain their respective meters at a level of accuracy that demonstrates meter readings between 98.5% and 101.5% of actual water flow. D. Both Parties shall provide the other with written notice within 10 days of knowledge that its respective meter is not functioning properly in accordance with the definition of Meter Accuracy. E. Both Parties shall have 60 days from having knowledge of their meter’s inaccuracy to repair or replace their meter if it is not functioning properly in accordance with the definition of Meter Accuracy. If either meter is not functioning in accordance with the definition of Meter Accuracy, the charges will be based on the meter in compliance. F. San Diego shall meter the Recycled Water delivered to Otay at the Point of Delivery. G. San Diego shall meter the Recycled Water delivered to San Diego Customers. H. San Diego shall read the San Diego Meter for purposes of the Billing Cycle for Otay. I. San Diego shall read the San Diego Customer Meters. J. Otay shall read the Otay Meter. 6.2 Meter Reading and Billing Cycle: 21815555.19 5 A. San Diego shall read the San Diego Meter each month (“Billing Cycle”). B. The City shall be responsible for metering the Recycled Water delivered to Otay at the Point of Delivery using the San Diego Meter. The quantity of Recycled Water for which payment is due by Otay in any month shall be the total quantity of Recycled Water delivered to Otay in the preceding Billing Cycle. C. San Diego will bill Otay within 30 calendar days thereafter at Otay’s address: 2554 Sweetwater Springs Blvd., Spring Valley, CA 91978-2004. D. San Diego will provide to Otay all meter read data for Otay and for San Diego Customers. E. Otay shall pay San Diego within 30 calendar days after the date of receipt of invoice. F. If Otay fails to pay any amount due within 30 days after receipt of invoice, then Otay shall also pay interest at the rate of 10% per annum from the date when due until payment is received. Failure to make a payment when due constitutes a curable default under this Agreement. 6.3 Access to Measuring Equipment and Meter Data: A. During all reasonable hours, each Party shall provide the other Party with access to the San Diego Meter and the Otay Meter (as applicable) and records pertinent to those meters and the quantity of Recycled Water delivered. B. Upon 48 hours’ notice, San Diego shall provide Otay with access to records pertinent to the quantity of Recycled Water delivered to San Diego Customers. C. Both parties shall allow the other the option for remote read capabilities for the other Party’s meters at the Party desiring the remote read capabilities sole costs. 6.4 Calibration of Equipment: San Diego shall be responsible for maintaining the San Diego Meter and any San Diego Customers’ Meters using Otay Facilities in good order and condition. Otay shall maintain the Otay Meter in good order and condition. Both Parties shall conduct tests at least once every twelve months to determine the accuracy of their meter. Both Parties shall notify the other at least forty-eight hours in advance of the time and location of each test in writing. The results of the test will be provided to the other Party. If either Party does not provide the written report of the test to the other Party within one month, then the other Party may perform a test of the untested meter with all costs being reimbursable by the owner Party by way of an adjustment to the next bill. If either Party requests in writing additional tests of the other Party’s meter within twelve months, the requesting Party shall pay an amount equal to the cost to perform each test only if the meter is found to be in compliance with Meter Accuracy. The requested test must be completed within 30 days of the request. 21815555.19 6 6.5 Verification of Calibration: At its sole cost and expense, either Party will have the right to independently test the other Party’s meter at any time during normal business hours upon 5 days prior written notice. Both Parties may monitor each test. 6.6 Inconsistent Meter Reads and Otay Meter: If any three-month average of the Otay Meter read is more than 8% different than the San Diego Meter read, after considering other San Diego Customer usage, both meters shall be recalibrated at the cost of the Party whose meter is not within the calibration standards. The meter that is within calibration standards will be used for billing purposes, and a true-up of billing will occur in the next billing cycle for that past three-month period. If both Parties’ meters are within calibration standards, the City’s Meter will be used for billing; however, City’s meters to customers using Otay Facilities will be tested at the City’s cost. Those test results shall be provided to Otay. Any inaccuracy in the San Diego Customer’s’ meters will be trued up in the next billing cycle. 6.7 Measuring Equipment Disputes: In the event of a dispute between San Diego and Otay regarding the accuracy of the testing equipment used by San Diego or Otay to conduct an accuracy test of the San Diego Meter or the Otay Meter, San Diego and Otay may mutually agree to have an independent accuracy test conducted. Such test shall be conducted by an independent measuring equipment company or other third party suitable to both San Diego and Otay. The cost of the test shall be paid equally by San Diego and Otay. 7. Recycled Water Facilities: Otay shall be responsible for all Recycled Water handling facilities it owns and operates from and beyond the Point of Delivery. Otay agrees to be responsible for maintaining and operating such facilities at its own cost and expense. San Diego will be responsible for payment of the use of Otay’s facilities as outlined in this Agreement. Otay reserves the right to operate Otay facilities beyond the Point of Delivery independently from San Diego, including but not limited to shutting down the valve at the Point of Delivery. San Diego shall be responsible for all Recycled Water facilities it owns and operates beyond the Point of Delivery and is responsible for maintaining and operating San Diego’s facilities that are used to serve San Diego Customers through the Otay Transmission System. 8. Interruptions in Service: 8.1 The Parties agree to jointly establish procedures for giving notice of any issues with the production or delivery of Recycled Water and the Otay Facilities, including the shutdown of any facilities or the interruption in the use of any facilities for the purpose of repairing or maintaining the facilities. In the event of an Interruption of Service, San Diego and Otay shall follow the mutually agreed Standard Operating Procedures. Operating procedures will not supersede any terms of this Agreement. The Parties hereby waive any right which they might have to recover damages from the other attributable to such interruptions. 8.2 Interruptions in Either Party’s Delivery of Recycled Water: The Parties recognize that certain factors could cause operational difficulties resulting in the temporary reduction or delivery of Recycled Water which does not meet the terms of this Agreement, or of other regulatory agency requirements, for Otay’s or the City’s intended uses. 21815555.19 7 In such cases, San Diego and Otay have the sole discretion to temporarily suspend delivery of Recycled Water from their respective facilities. Both parties will notify the other 20 days in advance of any planned interruption per the Standard Operating Procedures. Both Parties shall use their best efforts to re-establish the delivery of Recycled Water and shall re-establish delivery of such Recycled Water accordingly. Both Parties hereby waive any right which it might have to recover damages from the other party attributable to such interruptions. The sole remedy, for either party, for an Interruption in Service will be a reduction in the required payments corresponding to a reduction in the water used. 8.3 Alternate Supplies of Water: In the event of an Interruption in Service for the supply of Recycled Water, both Parties will be responsible for providing their own standby water supply. 9. Water Quality Requirements: 9.1 Recycled Water Quality: San Diego shall meet all applicable federal, state, and local health and water quality requirements, including but not limited to the requirements set forth in Title 22 of the California Code of Regulations, for Recycled Water produced and delivered to Otay at the Point of Delivery served by the Otay Transmission System. The Recycled Water shall not exceed 1000 mg/l TDS. San Diego shall provide Otay with notice within 48 hours of confirmation that water quality requirements are not met. 9.2 Water Quality Responsibility: Any error or omission caused by San Diego will be the responsibility of San Diego. Any error or omission caused by Otay will be the responsibility of Otay. 9.3 Otay Water Quality Requirements: Otay shall meet all applicable federal, state, and local health and water quality requirements for the distribution and use (but not manufacture) of the Recycled Water from the Point of Delivery. Otay shall be solely responsible for obtaining and complying with all environmental approvals and permits directly related to the Otay distribution system. 9.4 Title 22 Requirements: Both Parties shall clearly mark all respective Recycled Water pipelines and other facilities as a non-potable water source not suitable for drinking. Both Parties shall educate and train their respective employees and users on the use of Recycled Water consistent with Title 22, California Code of Regulations standards. 10. Right to Market: The Parties’ right to market, sell and re-sell Recycled Water shall be as follows: 10.1 San Diego retains all rights to sell and market Recycled Water to any party other than Otay in its sole discretion, provided such sales do not impact San Diego’s ability to supply up to 6MGD to Otay under this Agreement. However, if any sale of Recycled Water by San Diego will require the use of Otay Facilities, such sales must be approved by Otay in writing, which approval will be in Otay’s sole discretion. 21815555.19 8 10.2 Otay will not market or re-sell San Diego’s Recycled Water to another entity that is located outside of Otay’s customer service area without the written consent of San Diego, which consent shall be provided in San Diego’s sole discretion. 11. General Provisions 11.1 Data and Records: San Diego and Otay will make available to each other all data and records with respect to matters covered by this Agreement. Each Party shall permit the other to audit, examine, and make excerpts or transcripts from such data and records, and make audits of all invoices, materials, payrolls, records of personnel, and other data relating to all matters covered by this Agreement. San Diego and Otay shall maintain such data and records in an accessible location and condition for a period of not less than three years following the receipt of the final payment under this Agreement unless San Diego and Otay agree in writing to an earlier disposition. 11.2 Severability: If any section, subsection, sentence, clause, phrase or word of this Agreement, or the application thereof, to either Party, or to any person or circumstance is for any reason held invalid, it shall be deemed severable, and the validity of the remainder of the Agreement or the application of such provision to the other Party, or to any other persons or circumstance shall not be affected thereby. Each Party hereby declares that it would have entered this Agreement and each section, subsection, sentence, clause, phrase, and word thereof irrespective of the fact that one or more section, subsection, sentence, clause, phrase or word, or the application thereof to either Party or any other person or circumstance is held invalid. 11.3 Liability: With respect to any liability, including but not limited to claims asserted or costs, losses, attorney fees, or payments for injury to any person or property caused or claimed to be caused by the acts or omissions of a Party, or a Party’s agents, officers, and employees, that Party agrees to defend, indemnify, protect, and hold the other Party and its agents, officers, and employees harmless from and against any and all such liability, including all liability arising from, connected with, caused by, or claimed to be caused by the active or passive acts or omissions of the other Party, its agents, officers, or employees, or any third party. Each Party’s duty to defend, indemnify, protect, and hold harmless shall not include any claims or liability arising from the sole negligence or willful misconduct of the other Party, its agents, officers, or employees. 11.4 Insurance Requirements: If either Party carries insurance for the risks arising out of their duties under this Agreement, then that Party shall provide the other Party with an additional insured endorsement demonstrating that the other Party is named as an additional insured with coverage for both bodily injury and property damage in the form of a combined single limit liability policy in the amount of not less than $1 million. The insurance policies must be non-surplus and issued by an entity licensed in the State of California, and have attached a rider whereby it is provided that in the event of expiration or proposed cancellation of such policies for any reason whatsoever, the additional insured Party shall be notified by registered mail, return receipt requested, in no event less than 30 calendar days before expiration or cancellation is effective. The policy shall be kept in force for the duration of this Agreement. All deductibles on any policy will be the responsibility of the primary 21815555.19 9 insured Party. Each additional insured endorsement must be filed with the additional insured Party upon execution of this Agreement. 11.5 Amendment: This Agreement may be amended by the Parties only by way of a mutually-signed writing. Verbal modifications or amendments will be of no effect. 11.6 Mandatory Mediation. If a dispute arises over the interpretation or implementation of any of the terms of the Agreement, then the Parties shall attempt a mediation before having recourse in a court of law. The mediation will be conducted under the rules of any neutral organization agreed upon. In order to be effective, any agreements resulting from mediation must be documented in writing by all Parties and approved by each Party’s governing body. All mediation results will be inadmissible for any purpose in any legal proceeding unless the Parties otherwise agree upon admissibility in writing. 11.7 Assignment: Neither Party may assign the obligations under this Agreement without the other Party’s prior written approval. 11.8 Laws and Venue: This Agreement will be interpreted in accordance with the laws of the State of California. Venue for actions arising out of the Agreement will be in the County of San Diego, California. 11.9 Supersedure: This Agreement supersedes the 2003 Agreement as of the Effective Date of this Agreement. 11.10 Force Majeure: If the performance of any act required of San Diego or Otay is directly prevented or delayed by reason of strikes, lockouts, labor disputes, unusual governmental delays, acts of God, fire, floods, epidemics, freight embargoes, or other causes beyond the reasonable control of the Party required to perform an act, then that Party will be excused from performing that act for the period of time equal to the period of time of the prevention or delay. If San Diego or Otay claims the existence of such a delay, the Party claiming the delay shall notify the other Party in writing of that fact within 10 calendar days after the beginning of any such claimed delay. 11.11 Incorporation: By this reference the Parties incorporate the recitals and all exhibits into this Agreement. 11.12 Negotiated Agreement: This Agreement will not be construed in favor of or against either Party by reason of the extent to which each Party participated in the drafting of this Agreement. 11.13 Counterparts: This Agreement may be executed in counterparts, which, when taken together, will constitute a single signed original, as though all Parties had executed the same page. 11.14 Authority: A. San Diego’s consent or approval under this Agreement will mean the written consent or approval of San Diego’s Mayor, or his or her designee (“Mayor”), unless 21815555.19 Exhibit A EXHIBIT A DEFINITIONS As used in this Agreement, the following terms have the meanings provided below: a.“Adopted Prevailing Commodity Rate” means the unitary commodity rate for Recycled Water as established by the City of San Diego City Council Recycled Rate Schedule. b.“Adopted Prevailing Meter Rate” means the monthly fixed unitary meter rate for Recycled Water as established by the City of San Diego City Council. c.“Commodity Rate” means the current unitary rate for Recycled Water. d.“Interruption in Service” means a sustained interruption in the conveyance of Recycled Water either (a) from the SBWRP to Otay at the Point of Delivery or (b) to the San Diego Customers through Otay Facilities. e.“Point of Delivery” means the location to which San Diego agrees to deliver Recycled Water to Otay, more particularly described in Exhibit B to this Agreement. f.“Recycled Water” means wastewater that, as a result of a treatment, is suitable for uses other than potable uses, as set forth in Titles 17 and 22 of California’s Code of Regulations - Water Recycling Criteria guidelines for how treated and Recycled Water is discharged and used. Recycled Water is also referred to as reclaimed water. g.“Otay Facilities” means the Otay Reservoir, Otay Transmission System and Otay Disinfection System collectively. h.“Otay Reservoir” means any reservoir within the Otay recycled water 450 pressure zone system that is owned by Otay and supplies recycled water to both San Diego recycled water customers and Otay as outlined in Exhibit B. i.“Otay Transmission System” means the portion of the transmission system that conveys recycled water both to Otay and to San Diego recycled water customers as outlined in Exhibit B. j.“Otay Disinfection System” means any disinfection system within the Otay recycled water 450 pressure zone system that is owned by Otay and supplies recycled water to both San Diego recycled water customers and Otay as outlined in Exhibit B. k.“Otay Meter” means the bi-directional meter maintained by Otay at the 450-1 Reservoir to monitor flow into the reservoir and to record reverse flow to San Diego Customers served by the Otay Facilities. l.“San Diego Customers” means customers within the limits of the City of San Diego that San Diego sells Recycled Water to using the Otay Transmission System. 21815555.19 Exhibit A m.“San Diego Customers’ Meters” means the meters installed and maintained by San Diego at San Diego Customers’ points of service. n.“San Diego Meter” means the measuring system for reading the quantity of Recycled Water delivered to Otay at the Point of Delivery. o.“Standard Operating Procedures” means jointly agreed-upon operating procedures for the operation, communication, and notification of temporary service interruption regarding San Diego’s and Otay’s Recycled Water systems. This will be a stand-alone document that is continuously updated by both agencies. 21815555.19 Exhibit B EXHIBIT B 2 P:\S0300 East County(ECRTWIP)\000 Gen Finance\002 Agreements & Insurance\002.2 HelixWD\Agreement-helix 11-05 FINAL.doc File: S0301.002.2 Levy Plant may be expanded to 120 mgd in the future. Water treated at the Levy Plant is delivered or caused to be delivered by the Water Authority to Helix, Otay, and Padre Dam. Improved utilization of the Levy Plant benefits these agencies by providing an alternative source of local treated water, and benefits the region by significantly off-loading treated water demand from the Second Aqueduct and Skinner. To achieve expanded utilization of the Levy Plant, contracts must be developed requiring more use of the Levy Plant, as well as a number of treated water pipelines, pump stations, and improvements to flow control facilities. It is intended that improved utilization be accomplished by: (a) transfer of additional existing Levy Plant capacity to the Water Authority, (b) possible future expansion of Levy Plant capacity, (c) construction of additional infrastructure to transport and deliver treated water to member agencies, and, (d) effective utilization of the capacity so transferred and/or constructed. 7. The design capacity of the Water Authority’s Moreno-Lakeside Pipeline (MLP) is 81 mgd, after the San Vicente Pipeline, San Vicente Pump Station, and San Vicente Interconnect Pipeline projects are complete. Pursuant to the Capacity Agreement between the Water Authority and Helix, dated April 14, 1997 as amended by its second amendment, dated March 20, 2002, the allocation of the capacity in the MLP is 8 mgd for delivery to the Levy Plant for treatment and delivery to Otay, 18 mgd for delivery to the Levy Plant for treatment and delivery to Padre Dam, 41 mgd for delivery to Helix, and 14 mgd of unallocated capacity reserved for future use by the Water Authority. THE PARTIES AGREE: 1. Transfer of Capacity at the Levy Plant. Helix agrees to transfer an additional 10 mgd of capacity at Levy to the Water Authority, giving the Water Authority a capacity right of 36 mgd. Capacity shall be transferred at the time of and in proportion to the payment made pursua nt to paragraph 3. 2. Annual Maintenance and Cost Allocation for Transferred Capacity at the Levy Plant. Upon transfer of such capacity, the terms of the Capacity Agreement regarding the Annual Maintenance and Cost Allocation shall apply to the newly transferred capacity in the same way and on the same terms they apply to the capacity created in that agreement, except that the surcharge referred to in paragraph 3(d) of that agreement shall only apply to flows in excess of 110 acre- feet per day. The Parties agree to amend the Capacity Agreement to incorporate the change referred to in this paragraph. 3. Payment for Capacity at the Levy Plant. The Water Authority will pay Helix $10.6 Million for the additional 10 mgd capacity right at the Levy Plant. Payment will only be made after the other ECRTWIP agencies approve the agreements establishing guaranteed minimum purchases of water supplied from the Levy Plant. The payment schedule will be based upon progress made in the 3 P:\S0300 East County(ECRTWIP)\000 Gen Finance\002 Agreements & Insurance\002.2 HelixWD\Agreement-helix 11-05 FINAL.doc File: S0301.002.2 construction of other facilities allowing the commencement of additional service to the other agencies, as follows: a. Sixty percent (60%) upon commencement of direct service to Lakeside, via a new Flow Control Facility (FCF) from the Helix 54-inch transmission pipeline, or February 1, 2008, whichever comes first. b. Forty Percent (40%) upon commencement of service to Otay, via an improved Otay 14 FCF and new pipeline improvements allowing a service volume of 12 mgd at peak times. 4. Construction of Improvements by Helix. Helix agrees to diligently pursue the construction of the new Los Coches Pump Station and the 4,000-foot 48-inch Flume Improvement Project, as described by the Study, to be owned and operated by Helix, for completion by February 1, 2008. Helix agrees to assume lead agency role for environmental and permit compliance for this construction. Helix agrees that 24 mgd of the new Los Coches pump station capacity is for the exclusive use of the Water Authority. 5. Payment for Improvements. The Water Authority agrees to pay Helix one half of the actual cost of the 64 mgd Los Coches Pump Station project and the full cost of the 4,000-foot 48-inch Flume Improvement Project. The payment will be based on reimbursement of actual costs incurred, and will be made as follows: Water Authority to Pay Helix Time of Payment Water Authority’s share of estimated design, administration, and planning costs. Thirty (30) calendar days following the execution of this agreement. Half of Water Authority’s share of the construction contract and construction administration costs. Thirty (30) calendar days following Helix’s award of construction contract. Remainder of Water Authority’s share of construction contract and construction administration costs. Thirty (30) calendar days following expenditure of 50 percent of construction contract costs. Balance of Water Authority’s share of all remaining costs. At Notice of Completion of the Project. 6. Purchase of Capacity in 54-inch Transmission Main. Upon such time that Lakeside can receive at least 4 mgd of service from the 54-inch pipeline, or by February 1, 2008, whichever is sooner, the Water Authority agrees to purchase and Helix agrees to sell an additional 4 mgd of transmission capacity in Helix’s 54-inch Main Transmission Pipeline (in addition to the 4 mgd already owned by the Water Authority) at a cost of $300,000. On an off-peak as-available basis, Helix agrees to provide additional service, above the 8 mgd capacity owned by 4 P:\S0300 East County(ECRTWIP)\000 Gen Finance\002 Agreements & Insurance\002.2 HelixWD\Agreement-helix 11-05 FINAL.doc File: S0301.002.2 the Water Authority, up to 12 mgd total capacity, for use by the Water Authority in serving Lakeside, at no additional expense to the Water Authority. 7. Purchase of Capacity in Flume Pipeline to Otay 14. Upon such time that Otay can receive 12 mgd service through the Otay 14 connection, or February 1, 2008, whichever is sooner, the Water Authority agrees to purchase and Helix agrees to sell an additional 8 mgd of transmission capacity in Helix’s Flume Transmission Pipeline (in addition to the 4 mgd already owned by the Water Authority) at a cost of $1.5 million. 8. Purchase of Capacity in Flume Pipeline to Padre Dam 7. Upon such time that Padre Dam can receive 12 mgd service through the proposed Padre Dam 7 connection, or February 1, 2010, whichever is sooner, the Water Authority agrees to purchase and Helix agrees to sell an additional 12 mgd of transmission capacity in the portion of the Flume Transmission Pipeline from the Los Coches Pump Station to the Padre Dam 7 connection, at a cost of $600,000. 9. Future Expansion of the Levy Plant. Upon such time that the ECRTWIP participant agency demands have grown to warrant it, the Water Authority, at its sole discretion, may request Helix to expand the Levy Plant by an additional 14 mgd, to a total plant capacity of 120 mgd. The Water Authority shall provide Helix a one-year advance written notice of the intention to make such request. Helix agrees to diligently pursue construction of the plant expansion when so requested. The Water Authority will pay Helix for the full cost of this 14 mgd expansion of the treatment plant. The Water Authority will own this 14 mgd of new capacity and will pay Annual Maintenance and Cost Allocation for use of this capacity as provided for in the Capacity Agreement. The payment schedule will be as follows: Water Authority to Pay Helix Time of Payment Water Authority’s share of estimated design, administration, and planning costs. Ninety (90) calendar days following the request to Helix to expand the plant. Half of Water Authority’s share of the construction contract and construction administration costs. Thirty (30) calendar days following Helix’s award of construction contract. Remainder of Water Authority’s share of construction contract and construction administration costs. Thirty (30) calendar days following expenditure of 50 percent of construction contract costs. Balance of Water Authority’s share of all remaining costs. At Notice of Completion of the Project. 10. Moreno-Lakeside Pipeline Capacity. The Water Authority agrees that 10 mgd of the unallocated capacity in the recently constructed Moreno-Lakeside Pipeline (MLP) project will be dedicated to delivering untreated water from regional 5 P:\S0300 East County(ECRTWIP)\000 Gen Finance\002 Agreements & Insurance\002.2 HelixWD\Agreement-helix 11-05 FINAL.doc File: S0301.002.2 facilities to the Levy Plant or to local storage for the benefit of the Water Authority and its member agencies. The Parties agree to amend the Capacity Agreement to implement this change in allocation. 11. Indemnification. Helix and the Water Authority agree to mutually indemnify, defend at their own expense, including attorneys’ fees, and hold each other harmless from and against all claims, costs, demands, losses, and liability of any nature whatsoever, including but not limited to liability for bodily injury, sickness, disease or death, property damage (including loss of use), or violation of law, caused by or arising out of any error, omission, negligent act, or willful misconduct of that party, its officers, directors, employees, agents, volunteers, or any other person acting pursuant to its control in performing under this Agreement. 12. Laws and Venue. This agreement will be interpreted in accordance with the laws of the State of California. If any action is brought to interpret or enforce any term of this Agreement, the action shall be brought in a state or federal court in the County of San Diego, State of California. 13. Amendment. This agreement may be modified only by a subsequent written amendment executed by both Parties. 14. Successors or Assigns. This agreement and any portion thereof shall not be assigned or transferred, nor shall any of the duties be delegated, without the express written consent of both Parties, which shall not be unreasonably withheld or delayed. Any attempt to assign or delegate this agreement without the express written consent of both Parties shall be void and of no force or effect. 15. Notices. Any notice or instrument required to be given or delivered by this agreement may be given or delivered by depositing the same in any United States Post Office, postage prepaid, addressed to: Helix Water District 7811 University Avenue La Mesa, CA 91941 Attention: Mark S. Weston, General Manager San Diego County Water Authority 4677 Overland Avenue San Diego, CA 92123 Attention: Maureen A. Stapleton, General Manager 7 P:\S0300 East County(ECRTWIP)\000 Gen Finance\002 Agreements & Insurance\002.2 HelixWD\Agreement-helix 11-05 FINAL.doc File: S0301.002.2 EXHIBIT A East County Treated Water Distributio n Study P:\S0300 East County(ECRTWIP)\000 Gen Finance\002 Agreements & Insurance\002.4 Otay\Agreement-otay Final-32806.doc File: S0301.002.4 2 improved utilization be accomplished by: (a) transfer of additional existing Levy capacity to the Water Authority, (b) possible future expansion of Levy capacity, (c) construction of additional infrastructure to transport and deliver treated water to member agencies, and, (d) effective utilization of the capacity so transferred and/or constructed. 6. Facilities required to be constructed under the ECRTWIP are described and defined in a report titled, “East County Treated Water Distribution Study” (Study), dated May 2004, prepared for the Water Authority by Montgomery Watson-Harza (MWH), attached as Exhibit A. 7. The Water Authority and Otay have an agreement dated August 13, 2002 (The Otay 14 Agreement). Pursuant to the Otay 14 agreement, the Water Authority is obligated to pro- vide 8 mgd service to Otay in accordance with the 1976 Water Authority policy regarding treated water service, from the Otay 8 and the Otay 14 FCF, at no additional capital cost to Otay. Water is presently delivered from the Otay 8 FCF and Otay 14 FCF to the Otay system via the existing La Mesa Sweetwater Extension (LMSE) pipeline. The Otay 14 Agreement also provides (a) that improvement costs in the La Mesa Sweetwater Exten- sion pipeline (LMSE) and Helix Flume pipeline (Flume) associated with providing flows above 8 mgd are the responsibility of Otay, and (b) that arrangements for future service capacity increases may be made either by an amend ment of that agreement or by a sepa- rate agreement. A test of the LMSE flow capacity was made in April 2005. The results indicate that the maximum flow that can be transmitted to Otay via LMSE in its existing condition is 6.2 mgd. 8. The Water Authority is the owner and operator of the LMSE. 9. The Water Authority wishes for its own convenience to relocate the service presently provided at the Otay 8 FCF to the location of the Otay 14 FCF. 10. Otay wishes to increase its service capacity at the Otay 14 FCF location to a new total of at least 12 mgd of on-peak capacity and 16 mgd of off-peak capacity. THE PARTIES AGREE: 1. Exhibits. All exhibits attached to this agreement constitute an integral part of this agreement and are incorporated into the terms hereof. 2. Separate Agreement. The Parties agree that this agreement fulfills the Otay 14 Agreement condition of being a separate agreement to establish the terms and conditions for securing additional flow capacity for Otay via the Otay 14 FCF. The terms and cond itions established by this agreement are that the point of service delivery to Otay will be considered to be the Otay 14 FCF, and that Otay will bear all costs associated with improvements downstream of this point of service, and that the Water Authority will bear all costs associated with improvements upstream of this point of service. In the event of any conflict between the terms of the Otay 14 Agreement and this agreement, the terms of this agreement shall govern. P:\S0300 East County(ECRTWIP)\000 Gen Finance\002 Agreements & Insurance\002.4 Otay\Agreement-otay Final-32806.doc File: S0301.002.4 3 3. Otay 14 FCF Improvements. The Water Authority agrees to improve the Otay 14 FCF to increase its capacity to 16 MGD. The Water Authority will bear all costs associated with the improvement of capacity from 8 MGD to 12 MGD, and this shall serve as full compensation to Otay for the abandonment of the Otay 8 FCF. Otay shall bear all costs associated with the capacity increase from 12 MGD to 16 MGD. Each agency therefore agrees that it will be responsible for one-half of the total cost of improvement from 8 to 16 MGD. The preliminary estimate of Otay’s share of the cost is $0.5 million. Otay shall deposit with the Water Authority its share of the estimated cost in advance of any work commencing by the Water Authority, in accordance with Water Authority standard procedures, and shall comply with other provisions of such standard procedures. The standard Water Authority procedures for FCF construction are described in and involve the execution of a separate agreement on that subject. The terms of that agreement between Otay and the Water Authority will be substantially the same as the terms of the draft unexecuted AGREEMENT BETWEEN THE CITY OF SAN DIEGO AND THE SAN DIEGO COUNTY WATER AUTHORITY FOR DESIGN, CONSTRUCTION, OPERATION, AND MAINTENANCE OF SAN DIEGO 24, 25, AND 26 FLOW CONTROL FACILITY, attached as Exhibit B. Water Authority shall be the lead agency for design, construction, and environmental permitting for modifications to the Otay 14 FCF. The Parties agree to execute such an agreement in a timely fashion. 4. Otay 14 to Regulatory Reservoir Pipeline Improvement. Otay agrees to construct an entirely new pipeline from the Otay 14 FCF location to the regulatory reservoirs in the Otay system, as described in the Study. Otay agrees to assume lead agency role for environmental and permit compliance for this construction. Otay agrees to diligently pursue construction of this pipeline, and to have it in service no later than March 1, 2010. 5. Use of Water Authority Right-of-Way for Otay 14 to Regulatory Reservoir Pipeline Improvement. Otay will acquire any property rights needed for the construction of the pip eline project from any other entities or persons not parties to this agreement at its cost. It is agreed, however, that the Water Authority shall grant to Otay, at no cost to Otay, any property rights, such as easements, permits, including but not limited to encroachment and construction permits, right of way assignments or joint use, as required and applicable in each situation, to provide for the joint use, crossing, encroachment, or co-location of any portions of the pipeline that impact on any portion of the LMSE and/or Otay 14 FCF right-of-way, to the extent that Water Authority is legally able to do so, and provided that such use is not detrimental to Water Authority’s use of the LMSE pipeline or ROW for its own necessary purposes. Water Authority further agrees to process all Water Authority permits, assignments, plan reviews, and similar functions at no cost to Otay. Any such acquisition, permit, joint-use agreement, encroachment agreement or assignment of right of way to Otay will be by specific mutual agreement between the Water Authority and Otay and such agreement shall not be unreasonably denied or delayed by the Parties. The Parties recognize that any delay in negotiating suc h agreements may impact the timing of construction and agree to make best efforts to expedite review and approval of all reasonable terms. P:\S0300 East County(ECRTWIP)\000 Gen Finance\002 Agreements & Insurance\002.4 Otay\Agreement-otay Final-32806.doc File: S0301.002.4 4 6. Payment for Otay 14 to Regulatory Reservoir Pipeline. Water Authority agrees to reimburse Otay the sum of $4.2 Million towards the cost of the new pipeline. This payment is compensation due to the Water Authority’s planned termination of service to Otay via the LMSE pipeline, and is full and complete compensation for such termination of service, which will become effective upon completion of the new pipeline. The schedule of payment shall be as follows: Water Authority to Pay Otay Time of Payment Water Authority’s share of estimated administration, planning, and design costs ($420,000). Thirty (30) calendar days following Otay’s award of construction contract. Half of Water Authority’s share of the construction contract ($1,890,000). Thirty (30) calendar days following expenditure of 50 percent of construction contract costs. Remainder of Water Authority’s share of construction contract costs ($1,890,000). At Notice of Completion of the Project. 7. Minimum Water Purchase Guarantee. Otay agrees to purchase at least 10,000 acre-feet of water per calendar year from the Water Authority via the improved Otay 14 FCF beginning March 1, 2010. Except for conditions beyond Otay’s control, as described below, failure of Otay to purchase the required amount of water in any calendar year shall constitute a material breach of this agreement which will result in monetary damages to the Water Authority. The actual amount of such damages being difficult to quantify, the Parties agree for purposes of this agreement that the amount of damages to the Water Authority is equal to the difference between Helix’s charge to the Water Authority for treatment and the Water Authority’s melded water treatment charge. Otay agrees to pay the Water Authority upon demand for any such damages, provided that: a. No damages will be due, and the obligation to purchase the amount indicated is subject to temporary adjustments, where the failure to purchase the amount indicated above is due to an event or events beyond Otay’s control which occurred or was continuing during the calendar year during which the failure took place. b. To determine whether a temporary adjustment in the required purchase amount is warranted, Otay shall notify the Water Authority in writing within seven days of the beginning of any such occurrence, and shall state the adjustment in quantity believed to be warranted by said occurrence. Otay shall provide additional written notification every seven days of continuing occurrences. The Parties will review each such notification and by mutual agreement will determine the amount, if any, of temporary adjustment to be made. Should staff level mutual agreement not be possible regarding the amount of adjustment, the matter shall be presented to the Water Authority Board of Directors, whose decision on the matter shall be final. P:\S0300 East County(ECRTWIP)\000 Gen Finance\002 Agreements & Insurance\002.4 Otay\Agreement-otay Final-32806.doc File: S0301.002.4 5 c. For purposes of this Paragraph 7, the Water Authority agrees that terrorism, unexpected system failures or outages, shutdowns scheduled in advance at the request of the Water Authority or third parties, mandatory conservation orders, third party treatment plant issues or water quality problems, and other such events constitute events beyond Otay’s control. d. In the event of failures as described in 7(c), Water Authority will use best efforts to provide treated water from Otay 11 FCF. 8. Purchase Cost of Water. The Water Authority agrees to charge Otay the same price for water as is regularly charged to all other member agencies for treated water service, reflecting the total of the water supply, transportation, customer service, storage, and treatment charge, or, in the case of a change to the Water Authority rate structure, the identical applicable rates charged to its other member agencies for similar service. 9. Indemnification. Otay and the Water Authority agree to mutually indemnify, defend at their own expense, including attorneys’ fees, and hold each other harmless from and against all claims, costs, demands, losses, and liability of any nature whatsoever, including but not limited to liability for bodily injury, sickness, disease or death, property damage (including loss of use) or violation of law, caused by or arising out of any error, omission, negligent act or willful misconduct of that party, its officers, directors, employees, agents, volunteers or any other person acting pursuant to its control in performing under this agreement. 10. Laws and Venue. This agreement will be interpreted in accordance with the laws of the State of California. If any action is brought to interpret or enforce any term of this agreement, the action shall be brought in a state or a federal court in the County of San Diego. 11. Ame ndment. This agreement may be modified only by a subsequent written amendment executed by both Parties. 12. Successors or Assigns. This agreement and any portion thereof shall not be assigned or transferred, nor shall any of the duties be delegated, without the express written consent of both Parties, which shall not be unreasonably withheld or delayed. Any attempt to assign or delegate this agreement without the express written consent of both Parties shall be void and of no force or effect. 13. Notices. Any notice or instrument required to be given or delivered by this agreement may be given or delivered by depositing the same in any United States Post Office, postage prepaid, addressed to: Otay Water District 2554 Sweetwater Springs Blvd. Spring Valley, CA 91978 Attention: Mark Watton, General Manager P:\S0300 East County(ECRTWIP)\000 Gen Finance\002 Agreements & Insurance\002.4 Otay\Agreement-otay Final-32806.doc File: S0301.002.4 7 EXHIBIT A East County Treated Water Distribution Study P:\S0300 East County(ECRTWIP)\000 Gen Finance\002 Agreements & Insurance\002.4 Otay\Agreement-otay Final-32806.doc File: S0301.002.4 8 EXHIBIT B Agreement between the City of San Diego and the San Diego County Water Authority for Design, Construction, Operation, and Maintenance of San Diego 24, 25, and 26 Flow Control Facility Otay Water District 2025 Urban Water Management Plan June 2026 APPENDIX F: WATER AUTHORITY SUPPLY RELIABILITY ANALYSIS San Diego County Water Authority 2025 Urban Water Management Plan March 2026 9-1 Water Supply Reliability 9.1 Introduction Assessment of water supply reliability must include a comparison of total projected water supply and demands over the next 20 years in five-year increments under normal, single dry water years, and multiple dry water years. For this 2025 UWMP, the assessment evaluates water supply reliability through 2050. Verifiable water supplies are those included in water supply assessments, along with verifications prepared by retail water agencies. This supply information is used by San Diego County and cities in the San Diego region when making project-based land use decisions regarding available water supplies for growth as required by Senate Bill 221 and Senate Bill 610. Projects with adequate documentation regarding implementation and water supply use, or existing projects already planned for expansion, are included in assessments discussed in Sections 9.3 and 9.4 below. This chapter includes information about water demands and supplies in the Water Authority’s service area and summarizes the Water Authority’s water supply reliability assessment. Reliability assessment results demonstrate that, even when making conservative assumptions about the availability of dry year water supplies from Metropolitan, the San Diego region’s water resource mix is drought resilient. The Water Authority’s Drought Risk Assessment is provided in Section 9.6, Drought Risk Assessment. 9.2 Development of Projected Water Resources Portfolio Development of the Water Authority’s projected portfolio of water resources to meet future demand is based on the following factors: • Member agency projected water recycling, potable reuse, groundwater, desalination, water transfer, and surface water supplies (see Chapter 5, Member Agency Supplies) • Continued regional water use efficiency (see Chapter 3, Demand Management) • Water Authority Board approvals made in regard to its water supplies are listed below (see Chapter 4, Water Authority Supplies, and Chapter 11, Water Shortage and Drought Planning): o Agreement between Imperial Irrigation District and the Water Authority for transfer of conserved water, and other related agreements (see Section 4.2, Water Authority-Imperial Irrigation District Water Conservation and Transfer Agreement) o Agreements associated with the All-American Canal and Coachella Canal Lining Projects, and other related agreements (see Section 4.3, All-American Canal and Coachella Canal Lining Projects) o Water Purchase Agreement between the Water Authority and Channelside Water Resources for access to desalinated water produced at the Carlsbad Desalination Plant (see Section 4.5, Carlsbad Desalination Plant) o Acceptance of San Vicente Dam Raise Project (i.e., emergency and carryover storage) as complete (see Section 11.4.1, Water Authority Carryover Storage Program) San Diego County Water Authority 2025 Urban Water Management Plan March 2026 9-2 o Approval of the Water Authority’s 2024 Water Facilities Master Plan (Water Authority, 2025) (see Section 1.6, Capital Improvement Program) o Agreements and actions related to out-of-region groundwater banking programs (see Section 11.4.3, Water Authority’s Out-of-Region Groundwater Program) 9.3 Normal Water Year Assessment Table 9-1, below, shows a normal water year assessment with an overview of water demands in the Water Authority’s service area through 2050, along with the water supplies necessary to meet these demands under normal conditions. Section 2.4, Projected Water Demands, presents normal-year water demand projections, which also inform Table 9-1. As shown below, no water supply shortages are anticipated during normal water year conditions through 2050. Table 9-1 Normal Water Year Supply and Demand Assessment (AFY)a 2030 2035 2040 2045 2050 Water Authority Water Supplies Imperial Irrigation District Water Transfer 200,000 200,000 200,000 200,000 200,000 AAC and CC Lining Projects 77,700 77,700 77,700 77,700 77,700 Carlsbad Desalination Plant 42,000 42,000 42,000 42,000 42,000 Sub-Total 319,700 319,700 319,700 319,700 319,700 Member Agency Water Supplies (Verifiable) Surface Water 42,439 46,056 47,740 47,740 47,740 Water Recycling 34,207 34,463 34,702 34,872 35,042 Groundwater 20,610 20,610 20,610 17,110 17,110 Brackish Groundwater Recovery 9,650 9,290 9,290 9,290 9,290 Desalination 6,000 6,000 6,000 6,000 6,000 Potable Reuse 49,842 110,882 110,882 110,882 110,882 San Luis Rey Water Transfers 15,800 15,800 15,800 15,800 15,800 Sub-Total 178,548 243,101 245,024 241,694 241,864 Total Projected Supplies 498,248 562,801 564,724 561,394 561,564 Total Long-Range Demand Forecast with Efficiency Savings 461,915 470,433 479,867 484,176 489,759 MWD Water Supplies – – – – – Potential Surplus or (Shortage) 36,333 92,368 84,857 77,218 71,805 AAC = All-American Canal; AFY = acre-feet per year; CC = Coachella Canal; IID = Imperial Irrigation District; MWD = Metropolitan Water District of Southern California a Normal water year demands based on 1991 to 2020 weather. See Chapter 2, Water Demands. San Diego County Water Authority 2025 Urban Water Management Plan March 2026 9-3 For the reliability assessment, projected water supplies from Metropolitan were considered supplemental and calculated as the increment of supply necessary to meet demands after accounting for member agency supplies and Water Authority supplies. Metropolitan staff provided the Water Authority with estimated demands on Metropolitan that are used to inform their 2025 UWMP, and which demonstrate that supplies are adequate to cover the Water Authority’s supplemental need. As presented in Table 9-1, no supplemental water is anticipated to be necessary during normal water year conditions. Metropolitan’s estimated demand data are included in Appendix G, Water Authority Demands Provided by MWD. These include the Water Authority’s Quantification Settlement Agreement (QSA) supplies delivered under a Water Exchange Agreement with Metropolitan and San Luis Rey Water Transfer as discussed in Section 4.2, Imperial Irrigation District Water Conservation and Transfer Agreement, and Section 5.7, San Luis Rey Water Transfer Supply. 9.4 Dry Water Year Assessment The UWMP Act requires a water supply reliability assessment to compare supply and demand under single dry water years and multiple dry water years over the next 20 years, in five-year increments. Section 2.4.3, Projected Dry-Year Water Demands, describes the derivation of the dry- year demands. 9.4.1 Single Dry-Year Assessment Table 9-2 shows the single dry-year assessment. The projected dry-year demands reflect long-term water use efficiency, but do not incorporate potential savings due to extraordinary conservation occurring during droughts. This approach allows for more comprehensive shortage analyses and drought response planning. The projected groundwater and surface water yields shown in Table 9-2 are based on an average of recent (2013, 2018, and 2021) single dry-year supplies. Member agency projected verifiable supplies for recycling, potable reuse, desalination, brackish groundwater recovery, and San Luis Rey water transfer are assumed to experience little, if any, reduction in a dry year. Water Authority conserved water supplies from the Imperial Irrigation District transfer, canal lining projects, and Carlsbad Desalination Plant are also considered drought resilient as discussed in Chapter 4, Water Authority Supplies. For this single dry-year assessment, Metropolitan supplies are assumed to be limited to 1.3 million acre-feet (MAF) due to dry conditions and reduced deliveries from the State Water Project (i.e., no Delta improvements) and the Colorado River. In addition, the Water Authority is assumed to receive its preferential water rights based on Metropolitan’s current method of calculating such rights. With a conservative assumption regarding limited Metropolitan supplies during a single dry year, Water Authority and member agency supplies are maintained and developed as planned. With achievement of the additional conservation target, no shortages are anticipated in the Water Authority’s service area under single dry-year conditions. San Diego County Water Authority 2025 Urban Water Management Plan March 2026 9-4 Table 9-2 Single Dry-Year Supply and Demand Assessment (AFY) 2030 2035 2040 2045 2050 Water Authority Supplies IID Water Transfer 200,000 200,000 200,000 200,000 200,000 AAC and CC Lining Transfers 77,700 77,700 77,700 77,700 77,700 Desalination 42,000 42,000 42,000 42,000 42,000 Sub-Total 319,700 319,700 319,700 319,700 319,700 Member Agency Supplies a Surface Water 22,225 25,842 27,526 27,526 27,526 Water Recycling 34,207 34,463 34,702 34,872 35,042 Groundwater 18,221 18,221 18,221 14,721 14,721 Groundwater Recovery 9,650 9,290 9,290 9,290 9,290 Desalination 6,000 6,000 6,000 6,000 6,000 Potable Reuse 49,842 110,882 110,882 110,882 110,882 San Luis Rey Water Transfers 15,800 15,800 15,800 15,800 15,800 Sub-Total 155,945 220,498 222,421 219,091 219,261 MWD Supplies b 378,898 385,866 392,834 399,802 406,770 Total Projected Supplies without Storage Takes 854,543 926,064 934,955 938,593 945,731 Total Demand w/ Efficiency Savings 490,825 499,769 509,745 514,233 520,139 Potential Surplus or (Shortage) 363,718 426,295 425,210 424,360 425,592 Utilization of Carryover Storage – – – – – Total Projected Core Supplies with Utilization of Carryover Storage Supplies 854,543 926,064 934,955 938,593 945,731 Remaining Potential Surplus or (Shortage) 363,718 426,295 425,210 424,360 425,592 AAC = All-American Canal; AFY = acre-feet per year; CC = Coachella Canal; IID = Imperial Irrigation District; MWD = Metropolitan Water District of Southern California a Member agency local supplies include production from verifiable reliable sources, as well as dry-year totals for historic actual surface water and groundwater supplies (an average of 2013, 2018 and 2021). b MWD supplies based on preferential rights. See Chapter 6, Metropolitan Water District of Southern California. 9.4.2 Multiple Dry-Year Assessment Table 9-3 through Table 9-7, presented below and on the following pages, show multiple dry-year assessments in five-year increments as required in the UWMP Act. Under this scenario, desalination and San Luis Rey water transfer supplies are based on contractual levels; recycling, brackish groundwater recovery, and potable reuse yields are based on member agency projected growth in these verifiable supplies; and surface and groundwater yields are based on 2011 to 2015 water use levels. San Diego County Water Authority 2025 Urban Water Management Plan March 2026 9-5 During the multiple dry-year reliability analysis, it was conservatively assumed that Metropolitan would allocate supplies to its member agencies. By assuming allocations in the reliability assessment, the Water Authority could evaluate if draws from regional storage supplies are required and if there is a likelihood of shortages. Currently, Metropolitan allocates supplies through its Water Supply Allocation Plan (MWD, 2014). Because it is uncertain how Metropolitan will allocate supplies to its member agencies in the future, the analysis assumes supplies are allocated based on preferential right to Metropolitan supplies. As discussed in Section 6.1.1, Metropolitan Act Section 135 – Preferential Right to Water, Metropolitan Act Section 135 allows a Metropolitan member agency to acquire, for use within the agency, supplies based on preferential right at any time. The Water Authority’s annual preferential right of available Metropolitan supplies is estimated through 2050, as shown in Table 9-3 through Table 9-7 in consecutive five-year periods. To provide a conservative analysis due to numerous uncertainties associated with identifying Metropolitan’s future available supplies and storage capacity, Metropolitan’s total available dry-year supplies are assumed to be 1.3 MAF for the first year and 1.2 MAF per year for each of the following years in multiple dry-year conditions. Table 9-3 Multiple Dry Water Year Supply and Demand Assessment, 2026-2030 (AFY) 2026 2027 2028 2029 2030 Member Agency Supplies a 153,160 190,864 172,821 153,444 136,635 Water Authority Supplies 319,700 319,700 319,700 319,700 319,700 MWD Supplies b 373,324 345,893 347,179 348,466 349,752 Total Estimated Core Supplies w/o Storage Takes 846,184 856,457 839,700 821,610 806,087 Total Demand w/ Efficiency Savings 498,842 503,830 508,868 513,957 519,097 Potential Surplus or (Shortage) 347,342 352,627 330,832 307,653 286,990 Utilization of Carryover Supplies – – – – – Total Projected Core Supplies w/ Utilization of Carryover Storage Supplies 846,184 856,457 839,700 821,610 806,087 Remaining Potential Surplus or (Shortage) 347,342 352,627 330,832 307,653 286,990 AFY = acre-feet per year; MWD = Metropolitan Water District of Southern California a Member agency local supplies include verifiable recycling and brackish groundwater recovery, San Luis Rey water transfer, desalination, as well as extended dry-year estimates for surface water and groundwater. b MWD supplies based on preferential rights. See Chapter 6, Metropolitan Water District of Southern California, San Diego County Water Authority 2025 Urban Water Management Plan March 2026 9-6 Table 9-4 Multiple Dry Water Year Supply and Demand Assessment, 2031-2035 (AFY) 2031 2032 2033 2034 2035 Member Agency Supplies a 205,472 197,174 177,609 154,367 197,571 Water Authority Supplies 319,700 319,700 319,700 319,700 319,700 MWD Supplies b 380,292 352,325 353,611 354,898 356,184 Total Estimated Core Supplies w/o Storage Takes 905,464 869,199 850,920 828,965 873,455 Total Demand w/ Efficiency Savings 495,733 500,690 505,697 510,754 515,862 Potential Surplus or (Shortage) 409,731 368,509 345,223 318,211 357,593 Utilization of Carryover Supplies – – – – – Total Projected Core Supplies w/ Utilization of Carryover Storage Supplies 905,464 869,199 850,920 828,965 873,455 Remaining Potential Surplus or (Shortage) 409,731 368,509 345,223 318,211 357,593 AFY = acre-feet per year; MWD = Metropolitan Water District of Southern California a Member agency local supplies include verifiable recycling and brackish groundwater recovery, potable reuse, San Luis Rey water transfer, desalination, as well as extended dry-year estimates for surface water and groundwater. b MWD supplies based on preferential rights. See Chapter 6, Metropolitan Water District of Southern California. Table 9-5 Multiple Dry Water Year Supply and Demand Assessment, 2036-2040 (AFY) 2036 2037 2038 2039 2040 Member Agency Supplies a 266,405 258,104 238,535 215,289 197,810 Water Authority Supplies 319,700 319,700 319,700 319,700 319,700 MWD Supplies b 387,260 358,757 360,043 361,330 362,616 Total Estimated Core Supplies w/o Storage Takes 973,365 936,561 918,278 896,319 880,126 Total Demand w/ Efficiency Savings 504,767 509,815 514,913 520,062 525,262 Potential Surplus or (Shortage) 468,598 426,746 403,365 376,257 354,864 Utilization of Carryover Supplies – – – – – Total Projected Core Supplies w/ Utilization of Carryover Storage Supplies 973,365 936,561 918,278 896,319 880,126 Remaining Potential Surplus or (Shortage) 468,598 426,746 403,365 376,257 354,864 AFY = acre-feet per year; MWD = Metropolitan Water District of Southern California a Member agency local supplies include verifiable recycling and brackish groundwater recovery, potable reuse, San Luis Rey water transfer, desalination, as well as extended dry-year estimates for surface water and groundwater. b MWD supplies based on preferential rights. See Chapter 6, Metropolitan Water District of Southern California. San Diego County Water Authority 2025 Urban Water Management Plan March 2026 9-7 Table 9-6 Multiple Dry Water Year Supply and Demand Assessment, 2041-2045 (AFY) 2041 2042 2043 2044 2045 Member Agency Supplies a 266,630 258,315 238,733 215,473 197,980 Water Authority Supplies 319,700 319,700 319,700 319,700 319,700 MWD Supplies b 394,228 365,189 366,475 367,762 369,048 Total Estimated Core Supplies w/o Storage Takes 980,558 943,204 924,908 902,935 886,728 Total Demand w/ Efficiency Savings 514,843 519,991 525,191 530,443 535,748 Potential Surplus or (Shortage) 465,715 423,213 399,717 372,492 350,980 Utilization of Carryover Supplies – – – – – Total Projected Core Supplies w/ Utilization of Carryover Storage Supplies 980,558 943,204 924,908 902,935 886,728 Remaining Potential Surplus or (Shortage) 465,715 423,213 399,717 372,492 350,980 AFY = acre-feet per year; MWD = Metropolitan Water District of Southern California a Member agency local supplies include verifiable recycling and brackish groundwater recovery, potable reuse, San Luis Rey water transfer, desalination, as well as extended dry-year estimates for surface water and groundwater. b MWD supplies based on preferential rights. See Chapter 6, Metropolitan Water District of Southern California. Table 9-7 Multiple Dry Water Year Supply and Demand Assessment, 2046-2050 (AFY) 2046 2047 2048 2049 2050 Member Agency Supplies a 266,800 258,485 238,903 215,643 198,150 Water Authority Supplies 319,700 319,700 319,700 319,700 319,700 MWD Supplies b 401,196 371,621 372,907 374,194 375,480 Total Estimated Core Supplies w/o Storage Takes 987,696 949,806 931,510 909,537 893,330 Total Demand w/ Efficiency Savings 519,375 524,569 529,815 535,113 540,464 Potential Surplus or (Shortage) 468,321 425,237 401,695 374,424 352,866 Utilization of Carryover Supplies – – – – – Total Projected Core Supplies w/ Utilization of Carryover Storage Supplies 987,696 949,806 931,510 909,537 893,330 Remaining Potential Surplus or (Shortage) 468,321 425,237 401,695 374,424 352,866 AFY = acre-feet per year; MWD = Metropolitan Water District of Southern California a Member agency local supplies include verifiable recycling and brackish groundwater recovery, potable reuse, San Luis Rey water transfer, desalination, as well as extended dry-year estimates for surface water and groundwater. b MWD supplies based on preferential rights. See Chapter 6, Metropolitan Water District of Southern California. San Diego County Water Authority 2025 Urban Water Management Plan March 2026 9-8 In Chapter 10, Scenario Planning – Managing an Uncertain Future, climate change scenarios are presented that modify dry-year supplies available for allocation, assuming reduced deliveries from the State Water Project and Colorado River, along with limited storage supplies. This conservative approach is based on the Water Authority’s experience with previous five-year droughts and its adverse impacts on imported water supplies. The multiple dry-year demands utilize the single dry-year demand projection preceding the multi- year period as the basis for the start of the dry/hot cycle, then increases demands over the following five years by one percent per year. This method for assessing multiple dry-year events was used to account for the anticipated mitigation of water demand increases that would normally be associated with hot/dry weather, due to implementation of the Water Authority’s and member agencies’ demand management measures as they respond to the extended drought conditions. 9.4.3 Demand Hardening The San Diego region has a long history of adopting and implementing both conservation and supply diversification measures that support regional water supply resilience. These measures have supported the San Diego region in largely meeting state requirements for per capita water use, but prior long-term investments in water use efficiency may make it harder for customers to comply with voluntary or mandatory water restrictions in the future, known as “demand hardening.” While no water shortages are anticipated throughout the planning horizon for this 2025 UWMP, demand hardening may influence water conservation dynamics. As per capita water use decreases, the ability to achieve additional savings through voluntary or mandatory measures is significantly reduced. For customers who have already adopted more efficient water-use practices, savings achieved through drought pricing and other general increases may diminish, as essential uses are less responsive to price. Although shortage management measures may not be required, these factors could lead to less flexibility in managing potential water supply gaps. This underscores the value of the Water Authority’s investments in diversifying its water supply portfolio to ensure continued reliability and resilience during dry years. Section 11.4, Water Authority Dry Year Supplies and Carryover Storage, discusses the Water Authority’s potential dry-year supplies. 9.5 Reliability of Supply The above sections identify a diverse mix of resources that are planned to meet future demands during both normal and dry years. Implementation of this regional resource mix will require maintaining and developing projects and programs by the Water Authority, its member agencies, and Metropolitan. The Water Authority coordinated with its member agencies during preparation of the 2025 UWMP on future demands and supplies projected for the San Diego region. Steps being taken by member agencies and Metropolitan to develop water supplies are addressed in their respective UWMPs. Chapter 4, Water Authority Supplies, describes the steps taken and remaining actions necessary to develop and maintain Water Authority supplies. The UWMP Act requires agencies to describe the reliability of the water supply and any vulnerability to seasonal and climatic shortage. Section 9.3, Normal Water Year Assessment, and Section 9.4, Dry Water Year Assessment, describe water supply reliability assessment results for the San Diego region during normal water years, single dry-years, and multiple dry-years. The UWMP Act also requires the 2025 UWMPs to provide historical data about water supplies available for these three San Diego County Water Authority 2025 Urban Water Management Plan March 2026 9-9 water year types. Historic total supplies, both local and imported, were based on the following periods: Normal water year supply was based on average from 1986 to 2023 (surface water and groundwater); single dry-year supply was based on an average of 2013, 2018, and 2021; and multiple dry-year supply was based on 2011 to 2015. Supplies used during a non-allocation dry period could exceed the supplies used during a normal year based on availability. In Section 9.3, Normal Water Year Assessment, average local supply production is not based on historical yields, but are projected yields provided by member agencies. These figures more accurately reflect expected local yield based on member agencies’ current policies, as well as procedures regarding supply operations and management. Consistent monitoring of supply and demand and making necessary modifications to core and dry year resources, as identified in the normal and dry-year resource mixes, is key to long-term water supply reliability. As such, the Water Authority will continue to monitor the reliability of existing supplies and development of identified future supplies through an annual Water Supply and Demand Assessment and five-year updates to the UWMP. The UWMP Act requires any water source that may not be available at a consistent level of use given specific legal, environmental, water quality, or climatic factors, the agency describes, to the extent practicable, plans to replace that water source with alternative sources or demand management measures. As stated throughout this 2025 UWMP, the Water Authority and its member agencies have developed a diverse and reliable water resource portfolio. The unavailability of any one supply source will be buffered by planned diversity in supply as the San Diego region does not rely on a single water source. If a water supply should become unavailable, the Water Authority could work with member agencies to maximize development of recycled water, potable reuse, groundwater, and desalination. A scenario planning process was employed to adequately plan for potential supply uncertainties and is described in Chapter 10, Scenario Planning – Managing an Uncertain Future. 9.6 Drought Risk Assessment Wholesale water suppliers must include a drought risk assessment (DRA) in UWMPs. The DRA includes a description of the data, methodology, and basis for water shortage conditions necessary to conduct a DRA for five consecutive dry years. The DRA must also include a reliability determination of each water supply source and compare available water supplies and projected demands. Water suppliers may consider impacts from climate change, regulations, and other locally applicable criteria. The Water Authority’s DRA assessed a projected drought over the next five-year period from 2026 to 2030. The historical period used in the analysis to represent the Water Authority’s driest consecutive five-year period is 2014 to 2018. These years represent the five-year period with the lowest local water supply production from surface water and groundwater, the two local water supplies that are most susceptible to variation due to weather. Combined annual production from surface water and groundwater sources ranged from a high of 67,281 AF to a low of 21,137 AF. For each year from 2014 to 2018, a comparison was made between available water supplies and water demands. For the Water Authority supplies, which consist of the Imperial Irrigation District water transfer, All-American Canal and Coachella Canal lining projects, and regional desalination, no reduction in water supply availability over the five-year period would occur due to the drought resilience of these supplies. See Chapter 4, Water Authority Supplies, for further discussion. The San Diego County Water Authority 2025 Urban Water Management Plan March 2026 9-10 volume of the Water Authority’s supplies varies over the five-year period based on actual production during the assessment period of 2014 to 2018. Additional information on member agency supplies can be found in Chapter 5, Member Agency Supplies. For Metropolitan supplies, the volume of water available each year is based on the Water Authority’s estimated preferential right to Metropolitan purchases. Information on Metropolitan’s water supplies can be found in Chapter 6, Metropolitan Water District of Southern California. Once the available water supplies were calculated for each year of the DRA, the total was compared to the projected demands for each year. The demands for 2026 to 2030 were projected by escalating the 2025 demands of 444,870 AF annually for five years using multipliers presented in Table 9-8. Multipliers were based on a weather index developed to assess the impact of dry/hot weather on water demands. The dry/hot index was derived by combining historical observations on average maximum daily temperature and precipitation into a single indicator where higher values represent hotter-drier conditions. Specifically, the index was constructed from weather parameters of water demand forecasting models and used to determine the multipliers for consecutive dry/hot weather. Table 9-8 Demand Projection Multipliers, 2026-2030 2026 2027 2028 2029 2030 Multiplier 109% 109% 111% 114% 116% The data used to calculate the Water Authority’s water supply capabilities under the scenario of five consecutive dry years is shown in Table 9-9, below. The multipliers result in a sizable increase in 2026 water demand and incremental increases in demand over the remaining four years. This allows for a robust assessment of the Water Authority’s ability to meet dry year demands over the projected five-year period. Based on the analysis shown in Table 9-9, the Water Authority has a surplus of water supplies in all five years. Table 9-9 Drought Risk Assessment, 2026-2030 (AFY) 2026 2027 2028 2029 2030 Water Authority Supplies IID Water Transfer 200,000 200,000 200,000 200,000 200,000 AAC and CC Lining Transfers 77,700 77,700 77,700 77,700 77,700 Seawater Desalination 42,000 42,000 42,000 42,000 42,000 Sub-Total 319,700 319,700 319,700 319,700 319,700 Member Agency Supplies a Surface Water 20,375 6,004 15,660 51,191 21,731 Water Recycling 26,948 26,948 26,948 26,948 26,948 Groundwater 18,288 15,132 13,602 16,090 15,629 Groundwater Recovery 7,743 7,743 7,743 7,743 7,743 Seawater Desalination 6,000 6,000 6,000 6,000 6,000 Potable Reuse 45,486 46,492 49,842 49,842 San Diego County Water Authority 2025 Urban Water Management Plan March 2026 9-11 2026 2027 2028 2029 2030 San Luis Rey Water Transfers 15,865 15,865 15,865 15,865 15,865 Sub-Total 95,218 123,178 132,310 173,679 143,757 MWD Supplies b 373,324 345,893 347,179 348,466 349,752 Total Projected Supplies without Storage Takes 788,242 788,771 799,189 841,845 813,209 Total DRA Dry Year Demand w/ Efficiency Savings 484,908 484,908 493,806 507,152 516,049 Potential Surplus or (Shortage) 303,334 303,863 305,383 334,693 297,160 Utilization of Carryover Storage – – – – – Total Projected Core Supplies with Utilization of Carryover Storage Supplies 788,242 788,771 799,189 841,845 813,209 Remaining Potential Surplus or (Shortage) 303,334 303,863 305,383 334,693 297,160 AAC = All-American Canal; AFY = acre-feet per year; CC = Coachella Canal; CY = calendar year; DRA = Drought Risk Assessment; IID = Imperial Irrigation District; MWD = Metropolitan Water District of Southern California a Surface water and groundwater values based on lowest most recent five-year average of water use for these sources of supplies (CY 2014 to 2018). All other local supplies except potable reuse are held constant at actual CY 2025 levels. Table assumes same schedule of MWD total supply ramp-down from multi dry-year scenario. DRA dry year demands based on actual 2025 consumptive use and adjusted using multiple dry-year scales. b MWD supplies based on preferential rights. See Chapter 6, Metropolitan Water District of Southern California. 9.7 References Metropolitan Water District of Southern California (MWD). 2014. Water Supply Allocation Plan. December 2014 Revision. Available: https://bda.mwdh2o.com/Member%20Agency%20Materials%20%20Secure/0_Reference/ Water%20Supply%20Allocation%20Plan%20(2014).pdf. Accessed December 2025. San Diego County Water Authority (Water Authority). 2025. 2024 Water Facilities Master Plan. March. Available: https://www.sdcwa.org/wp-content/uploads/2025/05/2024-Water- Facilities-Master-Plan-1.pdf. Accessed December 2025. Otay Water District 2025 Urban Water Management Plan June 2026 APPENDIX G: OTAY WATER DISTRICT WATER SHORTAGE CONTINGENCY PLAN Otay Water District Water Shortage Contingency Plan Prepared by WSC Inc. & Otay Water District 6/3/2026 i Introduction.................................................................................................................................................... 1 1.0 Water Supply Reliability Analysis ...................................................................................................... 1 2.0 Annual Water Supply and Demand Assessment Procedures .......................................................... 2 2.2.1 Evaluation Criteria ................................................................................................................... 2 2.2.2 Water Supply ........................................................................................................................... 2 2.2.3 Unconstrained Customer Demand .......................................................................................... 2 2.2.4 Planned Water Use for Current Year Considering Dry Subsequent Year .............................. 2 2.2.5 Infrastructure Considerations .................................................................................................. 3 2.2.6 Other Factors ........................................................................................................................... 3 3.0 Six Standard Water Shortage Stages ............................................................................................... 3 4.0 Shortage Response Actions .............................................................................................................. 4 5.0 Communication Protocols ............................................................................................................... 10 6.0 Compliance and Enforcement ......................................................................................................... 12 7.0 Legal Authorities ............................................................................................................................. 12 8.0 Financial Consequences of WSCP ................................................................................................. 13 9.0 Monitoring and Reporting ................................................................................................................ 14 10.0 WSCP Refinement Procedures....................................................................................................... 14 11.0 Special Water Feature Distinction ................................................................................................... 14 12.0 Plan Adoption, Submittal, and Availability ....................................................................................... 15 Appendix 1 .................................................................................................................................................. 16 Appendix 2 .................................................................................................................................................. 17 Appendix 3 .................................................................................................................................................. 18 ii List of Tables Table 1. Water Shortage Contingency Plan Levels (DWR Table 8-1) ......................................................... 3 Table 2. Supply Augmentation Actions (DWR Table 8-2) ............................................................................ 6 Table 3. Demand Reduction Actions (DWR Table 8-3) ............................................................................... 7 Table 4. Communication Plan Outline .............................................................................................................. 11 Table 5. City and County Coordination on Proclamation of Emergencies ................................................. 12 Abbreviation or Acronym Meaning Cal-Am California American Water District Otay Water District DMM Demand Management Measure DWR California Department of Water Resources ECRTWIP East County Regional Treated Water Improvement Program ERP Emergency Response Plan ESP Emergency Storage Project mgd Million gallons per day MWD Metropolitan Water District of Southern California SCADA Supervisory Control and Data Acquisition UWMP Urban Water Management Plan Water Authority San Diego County Water Authority WD Water District WSCP Water Shortage Contingency Plan WTP Water Treatment Plant Appendix 1 District Ordinance Section 39 Appendix 2 Board Resolution Adopting the WSCP (to be included in Final) Appendix 3 San Diego County Multi-Jurisdictional Hazard Mitigation Plan Otay Water District Water Shortage Contingency Plan 1 In 1988, the Otay Water District (District) Board of Directors established a comprehensive water conservation program pursuant to California Water Code Sections 375 et seq., based upon the need to conserve water supplies and to avoid or minimize the effects of any future water supply shortage. The Otay Water District’s water conservation ordinance specified that the conditions prevailing in the San Diego County area require that the available water resources be put to maximum beneficial use to the extent to which they are capable, and that the waste or unreasonable use, or unreasonable method of use, of water be prevented. This document represents the Water Shortage Contingency Plan (WSCP) adopted by the District. The document follows the structure recommended in guidance documents prepared by the California Department of Water Resources (DWR). The numbering of Sections 1 through 12 corresponds with the numbered sections in the Urban Water Management Plan (UWMP) Guidebook. In 2018, new legislation expanded the required elements of a WSCP. The District has prepared this updated WSCP to meet these requirements. The District made minor revisions and clarifications to the WSCP in 2026 to align the WSCP tables with the 2025 UWMP Guidebook. The District is adopting it alongside its 2025 UWMP. The WSCP is a separate document from the UWMP. The District will continue to monitor the effectiveness of this WSCP, and if the need arises to modify this plan, the District will follow the update procedures described in Section 12. This section provides a summary of the supply reliability analysis presented in the UWMP and highlights key issues that could create a shortage condition. The District’s supplies have a high degree of reliability. The District obtains 100 percent of its potable water supplies from the San Diego County Water Authority (Water Authority). The availability of sufficient imported and regional potable water supplies to serve existing and planned uses within the District is demonstrated in the UWMPs for Metropolitan Water District of Southern California (MWD) and the Water Authority. The County Water Authority Act, Section 5 subdivision 11, states that the Water Authority “as far as practicable, shall provide each of its member agencies with adequate supplies of water to meet their expanding and increasing needs.” The Water Authority and its member agencies continue to make great strides to develop a more drought-resilient mix of water resources, thereby increasing the region’s ability to manage and avoid shortage situations. The Water Authority has evaluated the reliability of its supplies and found that it will be able to meet projected demands during normal years, dry years, or multiple dry years. Chapter 7 of the District’s UWMP presents a supply reliability analysis for a five-year dry period. This analysis shows that the District could continue to meet demands with water supplied by the Water Authority. Although that analysis demonstrates that the District’s urban water supply is reliable, there are potential issues that could create a shortage condition. These include: • An extended drought more severe than historic events, possibly impacted by climate change. • An extended and wide-spread power outage caused by a natural disaster or malevolent acts. • Regulatory mandates to reduce water use. Otay Water District Water Shortage Contingency Plan 2 Water shortage contingency planning provides a way to plan for these risks and anticipate actions that should be implemented to manage the impacts. This plan describes how the District intends to respond to such shortage events. The District is required to prepare an Annual Water Supply and Demand Assessment, referred to by DWR as the Annual Assessment, and submit it to DWR each year, beginning July 1, 2022. The Annual Assessment is intended to meet requirements of Water Code Section 10632.1 and present an assessment of the likelihood of a water shortage occurring during the next 12 months. This section of the WSCP outlines the procedures that the District uses to prepare the Annual Assessment. The procedures defined in this section allow the District to follow a consistent annual procedure for making the determination of whether to activate the WSCP. Decision Making Process The District coordinates its efforts with the Water Authority, which also prepares an Annual Assessment each year. The District uses the following procedures in preparing the Annual Assessment. 1. In approximately April of each year, District staff coordinate with Water Authority staff to gather the necessary information to complete the assessment. This information includes the status of imported water supplies and recent demand data. 2. In approximately May of each year, District staff determine whether adoption of a shortage response level should be presented to the District’s Board of Directors for consideration. 3. In June of each year, District staff complete the Annual Assessment and submit it to DWR. This timeline may be modified as new information becomes available. Data and Methodologies This section describes the data and methodologies that are used by the District to evaluate water system reliability for the coming year, while considering that the year to follow could be dry. 2.2.1 Evaluation Criteria The District relies on locally applicable criteria for each Annual Assessment. These criteria primarily are based on coordination with the Water Authority and its assessment of water supply availability. 2.2.2 Water Supply The District’s anticipated supplies are quantified for the near-term future, and descriptive text is used to note any anticipated reductions in supply. 2.2.3 Unconstrained Customer Demand The District prepares an estimate of unconstrained demand (as the term is used in Water Code Section 10632(a)(2)(B)(i)). The estimated demand is calculated using the demand projection approach described in the UWMP, in combination with updated data for connections, climate, changes in land use, and recent water usage history. 2.2.4 Planned Water Use for Current Year Considering Dry Subsequent Year Otay Water District Water Shortage Contingency Plan 3 The District describes the anticipated use of water supplies for the coming year, with the anticipation that the following year will be dry. The supplies are characterized in a manner consistent with the UWMP, in combination with updated data for climate and recent observations. 2.2.5 Infrastructure Considerations The District describes any potential infrastructure constraints on the ability to deliver adequate supplies to meet expected customer demands in the coming year. The District shows that its system of pipelines, pump stations, and storage tanks have adequate capacity to deliver the anticipated demands. The District describes any anticipated capital projects that are intended to address constraints in production, treatment, or distribution. 2.2.6 Other Factors The District describes any specific locally applicable factors that could influence or disrupt supplies. The District also describes unique local considerations that are considered as part of the annual assessment. The Water Code defines six standard shortage levels. The six standard water shortage levels correspond to progressively increasing estimated shortage conditions (up to 10-, 20-, 30-, 40-, 50- percent, and greater than 50-percent shortage compared to the normal reliability condition). The District’s WSCP includes six standard stages. The Water Authority’s WSCP also uses the six standard stages, allowing the agencies to align their response actions. All normal water efficiency programs and water conservation regulations shall remain in force during any stage unless the Board directs otherwise. The District’s shortage levels are identified in Table 1. Table 1. Water Shortage Contingency Plan Levels (DWR Table 8-1) Submittal Table 8-1: Cross-reference for Standard vs Supplier Shortage Levels Water Code Section 10632(a)(3)(B) Check the box if the Supplier uses the Standard six levels of water shortage. Proceed to the next table. Standard Shortage Levels Percent Shortage Range Shortage Response Actions 1 Up to 10% Voluntary measures described in Table 3 2 Up to 20% Mandatory measures described in Table 3 3 Up to 30% Mandatory measures described in Table 3 4 Up to 40% Mandatory measures described in Table 3 5 Up to 50% Mandatory measures described in Table 3 6 >50% Emergency shortage measures described in Table 3 Otay Water District Water Shortage Contingency Plan 4 The existence of Level 1 may be declared by the District’s General Manager. The existence of Level 2, 3, 4, or 5 conditions may be declared by resolution of the District Board of Directors. These stages can be triggered when there is water deficiency caused by limitations on supply or by limitations on the District’s delivery system. The plan shall be implemented in case of a long or short- term water deficiency, or in case of an emergency water shortage. Higher stages will be implemented as shortages continue and/or if customer response does not bring about desired water savings. Each level represents an anticipated reduction in the supplies that would normally be available to the District. These supply reductions could be the result of a variety of potential causes including natural forces, system component failure or interruption, regulatory actions, contamination, or any combination thereof. The stages involve voluntary and mandatory conservation measures and restrictions, depending on the causes, severity, and anticipated duration of the water supply shortage. The locally appropriate shortage response actions that would be taken at each level to address the resulting gap between supplies and demands are described in the following section. This section describes the shortage response actions that would be taken by the District at each shortage level. These actions have been grouped into categories including: • Supply Augmentation Actions • Demand Reduction Actions and Mandatory Use Restrictions • Operational Changes Supply Augmentation For long-range planning, the District continues to evaluate opportunities to increase supply reliability. These programs are described in detail in the water supply section of the UWMP. The District continues to pursue diversification of its water supply resources to increase reliability and flexibility. The District also continues to plan, design, and construct potable water system facilities to obtain these supplies and to distribute potable water to meet customer demands. The District has successfully negotiated two water supply diversification agreements that enhance reliability and flexibility, which are briefly described as follows: • The District entered into an agreement with the City of San Diego, known as the Otay Water Treatment Plant (WTP) Agreement. The Otay WTP Agreement provides for raw water purchase from the Water Authority and treatment by the City of San Diego at their Otay WTP for delivery to the District. The supply system link to implement the Otay WTP Agreement to access the region’s raw water supply system and the local water treatment plant became fully operational in August 2005 and was improved in 2021. This supply link consists of the typical storage, transmission, pumping, flow measurement, and appurtenances to receive and transport the treated water to the District’s system. The City of San Diego obligation to supply 10 million gallons per day (mgd) of treated water under the Otay WTP Agreement is contingent upon there being available 10 mgd of surplus treatment capacity in the Otay WTP until such time as District pays the City of San Diego to expand the Otay WTP to meet the District’s future needs. In the event that the City of San Diego’s surplus is projected to be less than 10 mgd the City of San Otay Water District Water Shortage Contingency Plan 5 Diego will consider and not unreasonably refuse the expansion of the Otay WTP to meet the District’s future needs. The Otay WTP existing rated capacity is 40 mgd with an actual effective capacity of approximately 34 mgd. The City of San Diego’s typical demand for treated water from the Otay WTP is approximately 20 mgd. It is at the City of San Diego’s discretion to utilize either imported raw water delivered by the Water Authority Pipeline No. 3 or local water stored in Lower Otay Reservoir for treatment to supply the District’s demand. • The District entered into an agreement with the Water Authority, known as the East County Regional Treated Water Improvement Program (ECRTWIP Agreement). The ECRTWIP Agreement provides for transmission of raw water to the Helix Water District R. M. Levy WTP for treatment and delivery to the District. The supply system link to implement the ECRTWIP Agreement is complete allowing access to the region’s raw water supply system and the local water treatment plant. This supply link consists of the typical transmission, pumping, storage, flow control, and appurtenances to receive and transport the potable water from the R. M. Levy WTP to the District. The District has also invested in emergency storage capacity. The District has established a goal to sustain a 10-day outage of supply from the Water at any time of the year without a reduction in service level. The District seeks to obtain this level of supply reliability through the development of alternative water supplies, through agreements with neighboring water districts, and through treated water storage. For emergency events longer than the 10-day aqueduct shutdowns noted previously, the District will utilize emergency supplies developed by Water Authority’s Emergency Storage Project (ESP). The ESP is designed to provide treated water service to all Water Authority member agencies during a two-month interruption in service of imported water deliveries into San Diego County. The ESP is sized to deliver up to 75 percent of each agency’s peak two-month summer demand. The key facilities of the ESP include the Olivenhain Dam and Conveyance System, the Lake Hodges Interconnect, the San Vicente-Miramar Pipeline, the San Vicente Pump Station, and the expansion of San Vicente Reservoir capacity. Another supply diversification approach is interconnections with neighboring agencies. There are several existing emergency interconnections with neighboring agency systems that can provide relatively small quantities of water to benefit the District, the other agency or both. These connections are typically used when performing shutdowns within specific localized pressure zones for planned operational circumstances or in the event of an emergency within an agency unrelated to Water Authority’s system operations. In many cases, the interconnections are at different operating pressures requiring the District to install temporary pumping facilities to fully utilize them. The District has eight existing minor interconnections with the Helix Water District, all eight of which are capable of supplying the District with water. The District has eight existing minor interconnections with Sweetwater Authority, one of which is capable of supplying the District with water. The District has one existing minor interconnection with Cal-American (Cal-Am) that is capable of supplying this private water company with water. The District has seven existing minor interconnections with the City of San Diego, six of which are capable of supplying the District with water. The supply augmentation actions are summarized in Table 2. Otay Water District Water Shortage Contingency Plan 6 Table 2. Supply Augmentation Actions (DWR Table 8-2) Submittal Table 8-2 Retail: Supply Augmentation and Other Actions Water Code Section 10632(a)(4)(A),(C) and (E) Yes Is the Supplier completing this table using the standard six levels? (yes/no) Shortage Level Supply Augmentation Methods and Other Actions by Water Supplier How much is this going to reduce the shortage gap? Additional Explanation or Reference (OPTIONAL) Volume or Percentage Shortage Gap Reduction Value (May be a range) (AF) All Other Purchases Percentage 5% - 10% Water purchase from City of San Diego All Stored Emergency Supply Percentage 5% - 10% Otay Water District storage and Water Authority Emergency Storage Plan Demand Reduction Actions and Mandatory Use Restrictions The District offers various rebates and programs to encourage conservation. These measures are described in detail in Chapter 9 of the District’s UWMP, which describes Demand Management Measures (DMMs). The demand reduction actions that will be implemented at each shortage level are shown in Table 3. The format of Table 3 is based on the standard submittal table defined by DWR. The column titled, “Penalty, Charge, or Enforcement” is a Yes/No field to characterize whether there is a penalty, charge, or enforcement action associated with implementing the demand reduction action. This field is a required field in the standard submittal table defined by DWR. Otay Water District Water Shortage Contingency Plan 7 Table 3. Demand Reduction Actions (DWR Table 8-3) Submittal Table 8-3 Retail: Demand Reduction Actions Water Code Section 10632(a)(4)(B),(D), and (E) Yes Is the Supplier completing this table using the standard six levels? (yes/no) Shortage Level Demand Reduction Actions How much is this going to reduce the shortage gap? Additional Explanation or Reference Penalty, Charge, or Other Enforcement? All Landscape - Restrict or prohibit runoff from landscape irrigation N/A Prevent water waste resulting from inefficient irrigation, such as runoff or overspray. Similarly, stop water flows onto non-targeted areas, such as adjacent property, non-irrigated areas, hardscapes, roadways, or structures. Yes All CII - Restaurants may only serve water upon request N/A Serve and refill water in restaurants and other food service establishments only upon request. Yes All CII - Lodging establishment must offer opt out of linen service N/A Offer guests in hotels, motels, and other commercial lodging establishments the option of not laundering towels and linens daily. Yes All Water Features - Restrict water use for decorative water features, such as fountains N/A Use only re-circulated water in fountains or other decorative water features. Yes All Other - Require automatic shut of hoses N/A Wash automobiles with a hose equipped only with a positive shut-off nozzle. Yes All Landscape - Prohibit certain types of landscape irrigation N/A Irrigating ornamental turf on public street medians only with recycled water if available. Yes All Other - Customers must repair leaks, breaks, and malfunctions in a timely manner N/A Repair all water leaks within forty-eight (48) hours of notification by the District unless other arrangements are made with the General Manager or designee. Yes All Landscape - Other landscape restriction or prohibition N/A Irrigation is not allowed during a rainstorm or for forty-eight (48) hours after one-quarter inch or more of rainfall is measured at Lindbergh Field. Yes All Other - Prohibit use of potable water for washing hard surfaces N/A No washing down of paved surfaces, including but not limited to sidewalks, driveways, parking lots, tennis courts, or patios, except when it is necessary to alleviate safety or sanitation hazards. Yes 1 Landscape - Limit landscape irrigation to specific times 5% - 10% Irrigate residential and commercial landscape before 10 a.m. and after 6 p.m. only. Customers are to water no more than three days a week using the suggested watering schedule as found on the District’s web page. New plantings and newly seeded areas are exempt for 30 days. No 1 Other - Require automatic shut of hoses 1% - 5% Use a hand-held hose equipped with a positive shut-off nozzle or bucket to water landscaped areas, including trees and shrubs located on residential and commercial properties that are not irrigated by a landscape irrigation system. No 1 Landscape - Limit landscape irrigation to specific times 5% - 10% Irrigate nursery and commercial grower’s products before 10 a.m. and after 6 p.m. only. Watering is permitted at any time with a hand-held hose equipped with a positive shut-off nozzle, a bucket, or when a drip/micro-irrigation system/equipment is used. Irrigation of nursery propagation beds is permitted at any time. Watering of livestock is permitted at any time. No 1 Other 1% - 5% Wash vehicles, including but not limited to motorcycles, farm equipment, trailers, boats and boat engines and motorhomes using a bucket and a hand-held hose with positive shut-off nozzle, mobile high pressure/low volume wash system, or at a commercial site that re-circulates (reclaims) water on-site. Vehicle washing is limited to once per week. No 1 Other 5% - 10% Use recycled or non-potable water for construction purposes when available. No 2 Landscape - Limit landscape irrigation to specific times 5% - 10% Irrigate residential and commercial landscape before 10 a.m. and after 6 p.m. only. Customers are to water no more than three days a week using the suggested watering schedule as found on the District’s web page. New plantings and newly seeded areas are exempt for 30 days. Yes 2 Other - Require automatic shut of hoses 1% - 5% Use a hand-held hose equipped with a positive shut-off nozzle or bucket to water landscaped areas, including trees and shrubs located on residential and commercial properties that are not irrigated by a landscape irrigation system. Yes 2 Landscape - Limit landscape irrigation to specific times 5% - 10% Irrigate nursery and commercial grower’s products before 10 a.m. and after 6 p.m. only. Watering is permitted at any time with a hand-held hose equipped with a positive shut-off nozzle, a bucket, or when a drip/micro-irrigation system/equipment is used. Irrigation of nursery propagation beds is permitted at any time. Watering of livestock is permitted at any time. Yes Otay Water District Water Shortage Contingency Plan 8 Submittal Table 8-3 Retail: Demand Reduction Actions Water Code Section 10632(a)(4)(B),(D), and (E) Yes Is the Supplier completing this table using the standard six levels? (yes/no) Shortage Level Demand Reduction Actions How much is this going to reduce the shortage gap? Additional Explanation or Reference Penalty, Charge, or Other Enforcement? 2 Other 1% - 5% Wash vehicles, including but not limited to motorcycles, farm equipment, trailers, boats and boat engines and motorhomes using a bucket and a hand-held hose with positive shut-off nozzle, mobile high pressure/low volume wash system, or at a commercial site that re-circulates (reclaims) water on-site. Vehicle washing is limited to once per week. Yes 2 Other 5% - 10% Use recycled or non-potable water for construction purposes when available. Yes 2 Landscape - Limit landscape irrigation to specific days 5% - 10% Limit residential and commercial landscape irrigation to no more than three (3) assigned days per week on a schedule established by the General Manager or designee and posted by the District. Yes 2 Landscape - Other landscape restriction or prohibition 5% - 10% Limit lawn watering and landscape irrigation using sprinklers to no more than ten (10) minutes per watering station per day. Yes 2 Landscape - Other landscape restriction or prohibition 5% - 10% Water landscaped areas, including trees and shrubs located on residential and commercial properties, and not irrigated by a landscape irrigation system on the same schedule set forth above by using a bucket, hand-held hose with positive shut-off nozzle, or low-volume non-spray irrigation. Yes 2 Water Features - Restrict water use for decorative water features, such as fountains 1% - 5% Stop operating fountains or similar decorative water features unless recycled water is used. Yes 3 Landscape - Limit landscape irrigation to specific days 5% - 10% Limit residential and commercial landscape irrigation to no more than two (2) assigned days per week on a schedule established by the General Manager or designee and posted by the District. Yes 3 Landscape - Other landscape restriction or prohibition 5% - 10% Water landscaped areas, including trees and shrubs located on residential and commercial properties, and not irrigated by a landscape irrigation system on the same schedule set forth above by using a bucket, hand-held hose with a positive shut-off nozzle, or low-volume non-spray irrigation. Yes 3 Other - Prohibit vehicle washing except at facilities using recycled or recirculating water 1% - 5% Stop washing vehicles except at commercial carwashes that re-circulate water. Yes 3 Moratorium or Net Zero Demand Increase on New Connections 5% - 10% The District will suspend consideration of annexations to its service area. Yes 3 Implement or Modify Drought Rate Structure or Surcharge 10% - 30% The District may establish a water allocation for property served by the District. Yes 4 Water Features - Restrict water use for decorative water features, such as fountains 1% - 5% Stop filling or re-filling ornamental lakes or ponds, except to the extent needed to sustain aquatic life. Yes 5 Landscape - Other landscape restriction or prohibition 5% - 10% Stop all landscape irrigation, except crops and landscape products of commercial growers and nurseries, subject to some exceptions specified in the ordinance. Yes 5 Other - Customers must repair leaks, breaks, and malfunctions in a timely manner 5% - 10% Repair all water leaks within twenty-four (24) hours of notification by the District unless other arrangements are made with the District. Yes 5 Moratorium or Net Zero Demand Increase on New Connections 5% - 10% No new potable water service shall be provided, no new temporary meters or permanent meters shall be provided and no statements of immediate ability to serve or provide potable water service (such as, will serve letters, certificates, or letters of availability) shall be issued, except under certain circumstances. Yes 6 Landscape - Other landscape restriction or prohibition 10% - 20% Stop all landscape irrigation, except crops and landscape products of commercial growers and nurseries, subject to some exceptions specified in the ordinance. Yes NOTES: N/A = Not Applicable. These actions are always in effect through a District Ordinance and should not affect the shortage gap significantly. Otay Water District Water Shortage Contingency Plan 9 Operational Changes The District has identified operational changes that could be made to help address a short-term gap between demands and available supplies. These include: • Improved monitoring and analysis of customer water usage. • Reductions in flushing of hydrants and dead-end lines. • Increased leak detection throughout the distribution system. • Expediting planned system improvement projects that include reduction in water loss (e.g., replacement of water mains that are experiencing higher rates of leaks and breaks). Additional Mandatory Restrictions The District has identified a series of restrictions that will be implemented at different shortage levels. These prohibitions are identified in the District’s Code of Ordinances, Section 39 – Drought Response Conservation Program and are included in the demand reduction actions in Table 3. Emergency Response Plan The Water Code requires that an agency’s WSCP address catastrophic water shortages and plans to address them. This information can be addressed in the agency’s Emergency Response Plan (ERP). Each agency’s ERP can contain sensitive information related to potential vulnerabilities or impacts of natural disasters or malevolent acts. Therefore, these documents are not typically made publicly available. Major hazards that can degrade the quality and/ or impact the quantity of water available to the District’s water system include regional power outages, earthquakes, chemical spills, and terrorist acts. Some of these hazards could also adversely impact the distribution systems, such as the major transmission mains or reservoirs. Interruptions to water supplies from any of the above-mentioned hazards may be limited to days or even months. The District’s ERP outlines measures to respond to such disasters. It could be activated whenever any of the following conditions exist: • Natural disasters such as earthquake, flood, etc. • Major loss of power • Loss of water transmission lines, main breaks, or other major facilities • Water quality issues involving a "boil water" order or other major public relations/communication issues • Emergency curtailment • Disturbance affecting nearby utilities • Hazardous spills • Terrorist activities The ERP will guide damage assessment, record keeping, prioritization of repairs, and coordination with other agencies. The goal is returning to normal operations as soon as practicable. The District has also established minor emergency interconnections with neighboring water agencies for use during short-term outages. The District has eight minor interconnections with Helix Water District, eight with Sweetwater Authority, and five with the City of San Diego that are capable of supplying the District with water. These minor interconnections are intended primarily for short-term repairs or Otay Water District Water Shortage Contingency Plan 10 emergencies. During an extended outage or water shortage, these neighboring agencies may not have sufficient supply at these minor interconnections to share significant amounts with the District. Seismic Risk Assessment and Mitigation Plan Water Code Section 10632.5 requires agencies to assess seismic risk to water supplies as part of their WSCP. The code also requires a mitigation plan for managing seismic risks. In lieu of conducting their own seismic risk assessment, suppliers can comply with the Water Code requirement by submitting the relevant local hazard mitigation plan or multi-hazard mitigation plan. The District participated in the development of the San Diego County Multi-Jurisdictional Hazard Mitigation Plan, which addressed seismic risk. A copy of the plan is included as Appendix 3 to this WSCP. Shortage Response Action Effectiveness The District has estimated the effectiveness of shortage response actions in terms of reducing the gap between expected supplies and demands. These estimates were developed using industry resources and observations from recent operating history at the District. These estimates have been included in Table 3. To determine the specific actions that should be taken at each level, the District and the Water Authority and its member agencies will evaluate conditions specific to the timing, supply availability, and cost, along with other pertinent variables. Timely and effective communication is a key element of WSCP implementation. The District will need to inform customers, the general public, and other government entities of WSCP actions taken during a water shortage (either one derived from the Annual Assessment, or an emergency or catastrophic event). The District will coordinate its communication efforts with the Water Authority and its 24 member agencies as detailed in Section 9 Communication Plan in the Water Authority’s WSCP. The communication protocols that could be used by the District at each shortage level are summarized in Table 4. Otay Water District Water Shortage Contingency Plan 11 Table 4. Communication Plan Outline Normal Conditions Level 1 Up to 10% Voluntary Conservation Level 2 Up to 20% Mandatory Conservation Levels 3 and 4 Up to 30% or 40% Mandatory Conservation Levels 5 and 6 Up to 50% or Over 50% Mandatory Conservation Standard outreach efforts in effect (media relations, social media, website) Update message platform to reflect conditions, District response, and needed actions from public Update campaign and messages to generate immediate actions/behaviors by public Update campaign and messages to raise awareness for more severe water-saving actions/behaviors by public Update campaign and messages to reflect extreme or emergency condition and likely need to focus water use on health/safety needs Promote ongoing WUE programs and tools and partnerships designed to achieve long-term water management goals Announce status change to key stakeholders, general public (News release, social media, etc.) Announce status change to key stakeholders, general public (News release, social media, etc.) Announce status change to key stakeholders, general public (News release, social media, etc.) Announce status change to key stakeholders, general public (News release, social media, etc.) Standard coordination with Water Authority Include increased conservation messages on website and in standard outreach efforts; provide regular condition updates to stakeholders/media Supplement Level 1 activities with additional tactics as needed; provide regular condition updates to stakeholders/media Supplement Level 2 outreach with additional tactics as needed; provide regular updates to stakeholders/media on conditions Supplement Level 3-4 outreach with additional tactics as needed; provide regular condition updates to stakeholders/media on conditions Quarterly Board reports on public communication and water-use efficiency outreach activities Enhance promotion of ongoing WUE programs/tools; deploy targeted advertising Conduct issue briefings with elected officials, other key civic and business leaders Conduct specialized outreach to reduce discretionary outdoor use while minimizing landscape damage Suspend promotion of long-term WUE programs/ tools to focus on imminent needs Initiate regular Board reports on campaign efforts Continue promotion of ongoing WUE programs/tools Promote available water assistance resources for vulnerable populations; specialized outreach to impacted industries Continue enhanced coordination with member agencies as needed (daily or weekly briefings or email updates, etc.) Otay Water District Water Shortage Contingency Plan 12 The District will enforce mandatory reduction programs as necessary to decrease consumption during a water shortage. The criminal, civil, and administrative penalties and remedies are specified in Section 72 of the District’s ordinance. Administrative fines may be levied for each violation. Violation of a provision of the ordinance is subject to enforcement through installation of a flow-restricting device in the meter. Each violation of the ordinance may be prosecuted as a misdemeanor punishable by imprisonment in the county jail for not more than thirty (30) days or by a fine not exceeding $1,000, or by both. Willful violations of the mandatory conservation measures and water use restrictions applicable during a Drought Response Level 6 condition may be enforced by discontinuing service to the property at which the violation occurs. Appeals and Exemption Process This section describes the appeals and exemption processes. Where feasible, specific exemptions can be identified and defined. Where not feasible, the process to appeal or obtain an exemption should be detailed. The District’s ordinance Section 39 includes details of granting a Hardship Variance in certain circumstances. This section describes the legal authorities that the District relies upon to implement the shortage response actions and the associated enforcement actions. The District’s Code of Ordinance Section 39 provides the District with authority to implement and enforce restrictions. A copy of the revised Section 39 is included as Appendix 1. In accordance with Water Code Chapter 3 (commencing with Section 350) of Division 1 general provisions regarding water shortage emergencies, the District shall declare a water shortage emergency in the event of a catastrophic interruption in supply. The District shall coordinate with any city or county within which it provides water supply services for the possible proclamation of a local emergency under California Government Code, California Emergency Services Act (Article 2, Section 8558). Including a list of and contacts for all cities or counties for which the Supplier provides service in the WSCP, along with developed coordination protocols, can facilitate compliance with this section of the Water Code in the event of a local emergency as defined in subpart (c) of Government Code Section 8558. The cities and counties in the District’s service area are shown in Table 5. Table 5. City and County Coordination on Proclamation of Emergencies City or County Contact San Diego County Office of Emergency Services, County of San Diego City of Chula Vista Office of Emergency Services, City of Chula Vista City of San Diego Office of Emergency Services, City of San Diego, and Director of Public Utilities Otay Water District Water Shortage Contingency Plan 13 This section describes the anticipated financial consequences to the District of implementing the WSCP. The description includes potential reductions in revenue due to lower water sales and increased expenses associated with implementing the shortage response actions. Potential financial impacts could include: • Reduced revenue from reduced water use. • Reduced revenue from suspending new service connections and annexations. • Increased staff costs for tracking, reporting, patrolling, and enforcing restrictions. • Economic impacts associated with water-dependent businesses in the service area. Potential mitigation measures may include: • Using financial reserves. • Reducing operation and maintenance expenses. • Deferring capital improvement projects. • Reducing future projected operation and maintenance expenses. • Increasing fixed readiness-to-serve charge. • Increasing commodity charge and water adjustment rates to cover revenue shortfalls. • Other financial management mechanisms. An extended water shortage would reduce the amount of water sold by the District to its customers. Since water bills are based on water consumption, the revenue received by the District would also be reduced. Some of the District’s costs might be increased, such as additional staff time for monitoring water use, or enforcing conservation policies. However, these efforts will be achieved by temporarily re-directing staff from other tasks. These changes in operation are not expected to cause a significant increase in the District’s total expenditures. If the reduction was due to a short-term situation, the District could absorb a portion of the shortfall by drawing on its general fund reserves, which are maintained at a target or minimum level defined by the Board. After conditions returned to normal, the District would replenish its reserves. The District’s response would be more complex if the 50 percent reduction in consumption was expected to be permanent. The District could eventually need to raise rates. Two factors would mitigate the need for more immediate increases. First, the District’s general fund reserves could be used to temporarily fill the gap between expenditures and revenues. Second, the shortfall includes a significant portion that would go to the Water Authority as it raises its rates, assuming the reduction was occurring across the region. To the extent the Water Authority’s rate stabilization fund was adequate they would likely spread their rate increases over several years, allowing the District to do the same. A permanent 50 percent reduction in water consumption might allow the District to achieve cost savings in some areas. The need for additional pumping, storage, and pipeline capacity might be reduced. The District might not require as much equipment or staff to maintain its infrastructure. However, the District might see higher expenditures in other areas, such as water use monitoring or answering questions from customers. Overall, these changes are not expected to have a significant impact on District expenditures. Otay Water District Water Shortage Contingency Plan 14 This section describes how the District will monitor and report on implementation of the WSCP. Mechanisms to determine reductions in water use include Water Authority water purchase invoices and records, which show prior use for comparison with District customer billing showing 36-month prior consumption history for each customer, and its Supervisory Control and Data Acquisition (SCADA) system. The District has a SCADA system to control, monitor, and collect data regarding the operation of the water system. The major facilities that have SCADA capabilities are the water supply sources, transmission network, pumping stations, and water storage reservoirs. The SCADA system allows for many and varied useful functions. Some of these functions provide for operating personnel to monitor the water supply source flow rates and reservoir levels, as well as turn pumps on or off. The SCADA system aids in the prevention of water reservoir overflow events and increases energy efficiency. The SCADA system can be used to monitor demands and evaluate the effectiveness of conservation measures. The District’s mechanisms for monitoring water use are summarized below: • Daily production and distribution records will provide data on system-wide changes in demand. • Customer billing data will provide data on month-to-month changes in water use, and year-to- year changes for key customers. • SCADA system will provide data on short-term changes in pumping, flow rates, or reservoir levels showing increased water use. The District will monitor the implementation of this plan to evaluate its effectiveness as an adaptive management tool. The monitoring and reporting program described in Section 9 will provide information on the effectiveness of the shortage response actions during any shortage levels that may be invoked. If the District determines that the shortage response actions are not effective in producing the desired results, it will initiate a process to refine the WSCP. The District will consider the addition of new shortage response actions or changes to the levels when shortage response actions are implemented. Suggestions for refinements will be collected from District staff, customers, industry experts, and the general public. The District will work with the Water Authority to share data and suggestions for refinement to identify opportunities to increase the effectiveness of the WSCP while maintaining alignment with other agencies in the region when possible. The District will review the WSCP’s description of procedures for the Annual Assessment each year while preparing the Annual Assessment and make adjustments as needed. The District has distinguished swimming pools and spas as recreational water features, while non-pool and non-spa water features are considered decorative water features. This distinction is used in the shortage response actions because decorative water features have the potential to use recycled water, Otay Water District Water Shortage Contingency Plan 15 while pools and spas (recreational water features) must use potable water for health and safety considerations. The District adopted the WSCP with the 2025 UWMP. The UWMP and WSCP were made available for public review during May of 2026. A public hearing was held on June 3, 2026 to allow public input on the draft UWMP and the WSCP. The District’s Board of Directors adopted the UWMP and the WSCP at a meeting on June 3, 2026. The resolution of adoption is included as an appendix. This WSCP was submitted to DWR through the WUEData portal before the deadline of July 1, 2026. This WSCP will be available to the public on the District’s website. Notice was provided to cities and counties in the service area that the WSCP is available on the District’s website. If the District identifies the need to amend this WSCP, it will follow the same procedures for notification to cities, counties, and the public as used for the UWMP and for initial adoption of the WSCP. The draft amended WSCP will be made available for public review, and the District’s governing board will hold a public hearing to receive comments on the draft amended WSCP. Once the District’s governing board adopts the amended WSCP, the amended plan will be submitted to DWR and the California State Library, and it will be made available to the public and the cities and counties in the service area through placement on the District’s web site. 39-1 SECTION 39. DROUGHT RESPONSE CONSERVATION PROGRAM 39.01 DECLARATION OF NECESSITY AND INTENT (a) This Section establishes water management requirements that are in addition to any permanent water waste prohibitions and are necessary to conserve water, enable effective water supply planning, assure reasonable and beneficial use of water, prevent waste of water, prevent unreasonable use of water, prevent unreasonable method of use of water within the District in order to assure adequate supplies of water to meet the needs of the public, and further the public health, safety, and welfare, recognizing that water is a scarce natural resource that requires careful management not only in times of a water shortage, but at all times. (b) This Section establishes regulations to be implemented during times of declared water shortages or declared water shortage emergencies. It establishes six levels of drought response actions to be implemented in times of shortage, with increasing restrictions on water use in response to worsening drought conditions and decreasing available supplies. (c) The Level 1 condition drought response measures are voluntary and will be reinforced through local and regional public education and awareness measures that may be funded in part by the District. Beginning at the level 2 Water Shortage Response Condition, the District may implement water shortage pricing. During drought response condition Levels 2 through 6, all conservation measures and water-use restrictions become mandatory and become increasingly restrictive in order to attain escalating conservation goals. (d) During a Drought Response Level 2 condition or higher, the water conservation measures, and water use restrictions established by this ordinance are mandatory and violations are subject to criminal, civil, and administrative penalties and remedies specified in Section 72 of this ordinance. 39-2 39.02 DEFINITIONS APPLICABLE TO THE PROGRAM (a) The following words and phrases whenever used in this Section shall have the meaning defined in this sub- section: 1. “Grower” refers to those engaged in the growing or raising, in conformity with recognized practices of husbandry, for the purpose of commerce, trade, or industry, or for use by public educational or correctional institutions, of agricultural, horticultural or floricultural products, and produced: (1) for human consumption or for the market, or (2) for the feeding of fowl or livestock produced for human consumption or for the market, or (3) for the feeding of fowl or livestock for the purpose of obtaining their products for human consumption or for the market. “Grower” does not refer to customers who purchase water subject to the Water Authority’s Permanent Special Agricultural Water Rate programs. 2. “Water Authority” means the San Diego County Water Authority. 3. “Metropolitan” means the Metropolitan Water District of Southern California. 4. “Permanent water use efficiency measures” means any permanent water use efficiency measure adopted by the District Board of Directors. 5. “Person” means any natural person, corporation, public or private entity, public or private association, public or private agency, government agency or institution, school district, college, university, or any other user of water provided by the District. 6. “WSCP” means the Water Authority’s Water Shortage Contingency Plan or the District’s Water Shortage Contingency Plan, as specified, in existence on the effective date of this ordinance and as readopted or amended from time to time, or an equivalent plan of the Water Authority to manage or allocate supplies during shortages. 39-3 39.03 APPLICATION (a) The provisions of this Section apply to any person in the use of any water provided by the District. (b) This Section is intended solely to further the conservation of water. It is not intended to implement any provision of federal, State, or local statutes, ordinances, or regulations relating to protection of water quality or control of drainage or runoff. Refer to the local jurisdiction or Regional Water Quality Control Board for information on any storm water ordinances and storm water management plans. (c) Nothing in this Section is intended to affect or limit the ability of the District to declare and respond to an emergency including an emergency that affects the ability of the District to supply water. (d) The provisions of this Section do not apply to use of water from private wells or to recycled water. (e) Nothing in this Section shall apply to use of water that is subject to a special supply program, such as the Water Authority Permanent Special Agricultural Water Rate programs. Violations of the conditions of special supply programs are subject to the penalties established under the applicable program. A person using water subject to a special supply program and other water provided by the District is subject to this Section in the use of the other water. At all times, the following practices shall be in effect: 1. Prevent water waste resulting from inefficient irrigation, such as runoff or overspray. Similarly, stop water flows onto non-targeted areas, such as adjacent property, non-irrigated areas, hardscapes, roadways, or structures; 2. Serve and refill water in restaurants and other food service establishments only upon request; 39-4 3. Offer guests in hotels, motels, and other commercial lodging establishments the option of not laundering towels and linens daily; 4. Use only re-circulated water in fountains or other decorative water features; 5. Wash automobiles with a hose equipped only with a positive shut-off nozzle; 6. Irrigating ornamental turf on public street medians only with recycled water; 7. Repair all water leaks within forty-eight (48) hours of notification by the District unless other arrangements are made with the General Manager or designee; 8. Irrigation is not allowed during a rainstorm or for forty-eight (48) hours after one-quarter inch or more of rainfall is measured at Lindbergh Field; 9. No washing down of paved surfaces, including but not limited to sidewalks, driveways, parking lots, tennis courts, or patios, except when it is necessary to alleviate safety or sanitation hazards. 39.04 DROUGHT RESPONSE LEVEL 1 (a) A Drought Response Level 1 condition applies when the Water Authority notifies its member agencies that due to drought or other supply reductions, there is a reasonable probability there will be supply shortages and that a consumer demand reduction of up to ten (10) percent is required in order to ensure that sufficient supplies will be available to meet anticipated demands. The General Manager shall declare the existence of a Drought Response Level 1 and take action to implement the Level 1 conservation practices identified in this Section. (b) During a Drought Response Level 1 condition, the District will increase its public education and outreach efforts to emphasize increased public awareness of the need to implement the water conservation practices noted above and the following water conservation practices. The same water conservation practices become mandatory if the District declares a Level 2 Drought Alert condition: 39-5 1. Irrigate residential and commercial landscape before 10 a.m. and after 6 p.m. only. Customers are to water no more than three days a week using the suggested watering schedule as found on the District’s web page. New plantings and newly seeded areas are exempt for thirty (30) days. 2. Use a hand-held hose equipped with a positive shut-off nozzle or bucket to water landscaped areas including trees and shrubs located on residential and commercial properties that are not irrigated by a landscape irrigation system. 3. Irrigate nursery and commercial grower’s products before 10 a.m. and after 6 p.m. only. Watering is permitted at any time with a hand-held hose equipped with a positive shut-off nozzle, a bucket, or when a drip/micro-irrigation system/equipment is used. Irrigation of nursery propagation beds is permitted at any time. Watering of livestock is permitted at any time. 4. Wash vehicles, including but not limited to motorcycles, farm equipment, trailers, boats and boat engines and motorhomes using a bucket and a hand-held hose with positive shut-off nozzle, mobile high pressure/low volume wash system, or at a commercial site that re-circulates (reclaims) water on-site. Vehicle washing is limited to once per week. 5. Use recycled or non-potable water for construction purposes when available. 39.05 DROUGHT RESPONSE LEVEL 2 (a) A Drought Response Level 2 condition applies when the Water Authority notifies its member agencies that due to cutbacks caused by drought or other reduction in supplies, a consumer demand reduction of up to twenty (20) percent is required in order to have sufficient supplies available to meet anticipated demands. The District Board of Directors shall declare the existence of a Drought Response Level 2 condition and implement the mandatory Level 2 conservation measures identified in this Section of the ordinance. 39-6 (b) All persons using District water shall comply with Level 1 water conservation practices during a Drought Response Level 2 condition, and shall also comply with the following additional conservation measures: 1. Limit residential and commercial landscape irrigation to no more than three (3) assigned days per week on a schedule established by the General Manager or designee and posted by the District. This section shall not apply to commercial growers or nurseries. 2. Limit lawn watering and landscape irrigation using sprinklers to no more than ten (10) minutes per watering station per day. This provision does not apply to landscape irrigation systems using water efficient devices, including but not limited to weather-based controllers, drip/micro-irrigation systems, and stream rotor sprinklers. 3. Water landscaped areas, including trees and shrubs located on residential and commercial properties, and not irrigated by a landscape irrigation system on the same schedule set forth above, by using a bucket, hand-held hose with positive shut-off nozzle, or low-volume non-spray irrigation. 4. Stop operating fountains or similar decorative water features unless recycled water is used. 39.06 DROUGHT RESPONSE LEVEL 3 – DROUGHT CRITICAL CONDITION (a) A Drought Response Level 3 condition applies when the Water Authority notifies its member agencies that due to increasing cutbacks caused by drought or other reduction of supplies, a consumer demand reduction of up to thirty (30) percent is required in order to have sufficient supplies available to meet anticipated demands. The District Board of Directors shall declare the existence of a Drought Response Level 3 condition and implement the Level 3 conservation measures identified in this Section. (b) All persons using District water shall comply with Level 1 and Level 2 water conservation practices 39-7 during a Drought Response Level 3 condition and shall also comply with the following additional mandatory conservation measures: 1. Limit residential and commercial landscape irrigation to no more than two (2) assigned days per week on a schedule established by the General Manager or designee and posted by the District. This section shall not apply to commercial growers or nurseries. 2. Water landscaped areas, including trees and shrubs located on residential and commercial properties, and not irrigated by a landscape irrigation system on the same schedule set forth above, by using a bucket, hand-held hose with a positive shut-off nozzle, or low-volume non-spray irrigation. 3. Stop washing vehicles except at commercial carwashes that re-circulate water, or by high pressure/low volume wash systems. If a commercial car wash cannot accommodate the vehicle because of the vehicle size or type, such as RVs, horse trailers, boats, and commercial vehicles, customers will be allowed to wash vehicles using a bucket and a hand- held hose with positive shut-off nozzle, mobile high pressure/low volume wash system. (c) Upon the declaration of a Drought Response Level 3 condition, the District will suspend consideration of annexations to its service area. (d) The District may establish a water allocation for property served by the District using a method that does not penalize persons for the implementation of conservation methods or the installation of water saving devices. If the District establishes a water allocation, it shall provide notice of the allocation by including it in the regular billing statement for the fee or charge or by any other mailing to the address to which the District customarily mails the billing statement for fees or charges for on-going water service. Following the effective date of the water allocation as established by the District, any person that uses water in excess of the allocation shall be subject to a penalty for each billing unit of water in excess of the allocation. The penalty for excess water 39-8 usage shall be cumulative to any other remedy or penalty that may be imposed for violation of this Section. 39.07 DROUGHT RESPONSE LEVEL 4 (a) A Drought Response Level 4 condition applies when the Water Authority notifies its member agencies that due to increasing cutbacks caused by drought or other reduction of supplies, a consumer demand reduction of up to forty (40) percent is required in order to have sufficient supplies available to meet anticipated demands. The District Board of Directors shall declare the existence of a Drought Response Level 4 condition and implement the Level 4 conservation measures identified in this Section. (b) All persons using District water shall comply with Level 1, Level 2, and Level 3 water conservation practices during a Drought Response Level 4 condition and shall also comply with the following additional mandatory conservation measures: Stop filling or re-filling ornamental lakes or ponds, except to the extent needed to sustain aquatic life, provided that such animals are of significant value and have been actively managed within the water feature prior to declaration of a water shortage response level under this Section. (c) The District may establish a water allocation for property served by the District using a method that does not penalize persons for the implementation of conservation methods or the installation of water saving devices. If the District establishes a water allocation, it shall provide notice of the allocation by including it in the regular billing statement for the fee or charge or by any other mailing to the address to which the District customarily mails the billing statement for fees or charges for on-going water service. Following the effective date of the water allocation as established by the District, any person that uses water in excess of the allocation shall be subject to a penalty for each billing unit of water in excess of the allocation. The penalty for excess water usage shall be cumulative to any other remedy or penalty that may be imposed for violation of this Section. 39-9 39.08 DROUGHT RESPONSE LEVEL 5 (a) A Drought Response Level 5 condition applies when the Water Authority notifies its member agencies that due to increasing cutbacks caused by drought or other reduction of supplies, a consumer demand reduction of up to fifty (50) percent is required in order to have sufficient supplies available to meet anticipated demands. The District Board of Directors shall declare the existence of a Drought Response Level 5 condition and implement the Level 5 conservation measures identified in this ordinance. (b) All persons using District water shall comply with conservation measures required during Level 1, Level 2, Level 3, and Level 4 conditions and shall also comply with the following additional mandatory conservation measures: 1. Stop all landscape irrigation, except crops and landscape products of commercial growers and nurseries. This restriction shall not apply to the following categories of use unless the District has determined that recycled water is available and may be lawfully applied to the use. A. Maintenance of trees and shrubs that are watered on the same schedule as noted above, by using a bucket, hand-held hose with a positive shut-off nozzle, or low-volume non-spray irrigation; B. Maintenance of existing landscaping necessary for fire protection as specified by the Fire Marshal of the local fire protection agency having jurisdiction over the property to be irrigated; C. Maintenance of existing landscaping for erosion control; D. Maintenance of plant materials identified to be rare or essential to the well- being of rare animals; E. Maintenance of landscaping within active public parks and playing fields, day care 39-10 centers, school grounds, cemeteries, and golf course greens, provided that such irrigation does not exceed two (2) days per week according to the schedule established under the District’s Level 3 Condition; F. Watering of livestock; and G. Public works projects and actively irrigated environmental mitigation projects. 2. Repair all water leaks within twenty-four (24) hours of notification by the District unless other arrangements are made with the District. (c) The District may establish a water allocation for property served by the District that does not penalize persons for the implementation of conservation methods or the installation of water saving devices. If the District establishes a water allocation, it shall provide notice of the allocation by including it in the regular billing statement for the fee or charge or by any other mailing to the address to which the District customarily mails the billing statement for fees or charges for on-going water service. Following the effective date of the water allocation as established by the District, any person that uses water in excess of the allocation shall be subject to a penalty for each billing unit of water in excess of the allocation. The penalty for excess water usage shall be cumulative to any other remedy or penalty that may be imposed for violation of any provision of this Section. (d) Upon the declaration of a Level 5 condition, no new potable water service shall be provided, no new temporary meters or permanent meters shall be provided and no statements of immediate ability to serve or provide potable water service (such as, will serve letters, certificates, or letters of availability) shall be issued, except under the following circumstances: 1. A valid, unexpired building permit has been issued for the project; or 2. The project is necessary to protect the public’s health, safety, and welfare; or 39-11 3. The applicant provides substantial evidence of an enforceable commitment that water demands for the project will be offset prior to the provision of a new water meter(s) to the satisfaction of the District. This provision shall not be construed to preclude the resetting or turn-on of meters to provide continuation of water service or to restore service that has been interrupted for a period of one (1) year or less. 39.09 DROUGHT RESPONSE LEVEL 6 (a) A Drought Response Level 6 condition applies when the Water Authority Board of Directors declare a water shortage emergency pursuant to California Water Code Section 350 and notifies its member agencies that Level 6 requires a demand reduction of more than fifty (50) percent in order for the District to have maximum supplies available to meet anticipated demands. The District shall declare a Drought Emergency in the manner and on the grounds provided in California Water Code Section 350. (b) All persons using District water shall comply with conservation measures required during Level 1, Level 2, Level 3, Level 4, and Level 5 conditions and shall also comply with the following additional mandatory conservation measures: 1. Stop all landscape irrigation, except crops and landscape products of commercial growers and nurseries. This restriction shall not apply to the following categories of use unless the District has determined that recycled water is available and may be lawfully applied to the use. A. Maintenance of existing landscaping necessary for fire protection as specified by the Fire Marshal of the local fire protection agency having jurisdiction over the property to be irrigated; B. Maintenance of existing landscaping for erosion control; 39-12 C. Maintenance of plant materials identified to be rare or essential to the well- being of rare animals; D. Watering of livestock; and E. Public works projects and actively irrigated environmental mitigation projects. 39.10 PROCEDURES FOR DETERMINATION AND NOTIFICATION OF DROUGHT RESPONSE LEVEL (a) The existence of a Drought Response Level 1 condition may be declared by the General Manager upon a written determination of the existence of the facts and circumstances supporting the determination. A copy of the written determination shall be filed with the Clerk or Secretary of the District and provided to the District Board of Directors. The General Manager may publish a notice of the determination of existence of Drought Response Level 1 condition in one or more newspapers including a newspaper of general circulation within the District. The District will also post notice of the condition on their website. (b) The existence of Drought Response Level 2, Level 3, Level 4, or Level 5 conditions may be declared by resolution of the District Board of Directors adopted at a regular or special public meeting held in accordance with State law. The mandatory conservation measures applicable to Drought Response Level 2, Level 3, Level 4, or Level 5 conditions shall take effect on the tenth (10) day after the date the response level is declared. Within five (5) days following the declaration of the response level, the District shall publish a copy of the resolution in a newspaper used for publication of official notices. If the District establishes a water allocation, it shall provide notice of the allocation by including it in the regular billing statement for the fee or charge or by any other mailing to the address to which the District customarily mails the billing statement for fees or charges for on- going water service. Water allocation shall be effective on the fifth (5) day following the date of mailing or at such later date as specified in the notice. 39-13 (c) The existence of a Drought Response Level 6 condition may be declared in accordance with the procedures specified in California Water Code Sections 351 to 352. The mandatory conservation measures applicable to Drought Response Level 6 conditions shall take effect on the tenth (10) day after the date the response level is declared. Within five (5) days following the declaration of the response level, the District shall publish a copy of the resolution in a newspaper used for publication of official notices. (d) The District Board of Directors may declare an end to a Drought Response Level by the adoption of a resolution at any regular or special meeting held in accordance with State law. 39.11 HARDSHIP VARIANCE (a) If, due to unique circumstances, a specific requirement of this ordinance would result in undue hardship to a person using agency water or to property upon which agency water is used, that is disproportionate to the impacts to District water users generally or to similar property or classes of water uses, then the person may apply for a variance to the requirements as provided in this Section. (b) The variance may be granted or conditionally granted, only upon a written finding of the existence of facts demonstrating an undue hardship to a person using agency water or to property upon with agency water is used, that is disproportionate to the impacts to District water users generally or to similar property or classes of water use due to specific and unique circumstances of the user or the user’s property. 1. Application. Application for a variance shall be a form prescribed by the District and shall be accompanied by a non-refundable processing fee in an amount set by resolution of the District Board of Directors. 2. Supporting Documentation. The application shall be accompanied by photographs, maps, drawings, and other information including a written statement of the applicant. 39-14 3. Required Findings for Variance. An application for a variance shall be denied unless the approving authority finds, based on the information provided in the application, supporting documents, or such additional information as may be requested, and on water use information for the property as shown by the records of the District, all of the following: A. That the variance does not constitute a grant of special privilege inconsistent with the limitations upon other District customers; B. That because of special circumstances applicable to the property or its use, the strict application of this ordinance would have a disproportionate impact on the property or use that exceeds the impacts to customers generally; C. That the authorizing of such variance will not be of substantial detriment to adjacent properties and will not materially affect the ability of the District to effectuate the purpose of this chapter and will not be detrimental to the public interest; D. That the condition or situation of the subject property or the intended use of the property for which the variance is sought is not common, recurrent, or general in nature. 4. Approval Authority. The General Manager shall exercise approval authority and act upon any completed application no later than ten (10) days after submittal and may approve, conditionally approve, or deny the variance. The applicant requesting the variance shall be promptly notified in writing of any action taken. Unless specified otherwise at the time a variance is approved, the variance applies to the subject property during the term of the mandatory drought response. 5. Appeals to District Board of Directors. An applicant may appeal a decision or condition of the General Manager on a variance application to the District Board of Directors within ten (10) days of the decision upon written request for a hearing. The 39-15 request shall state the grounds for the appeal. At a public meeting, the District Board of Directors shall act as the approval authority and review the appeal de novo by following the regular variance procedure. The decision of the District Board of Directors is final. 39.12 VIOLATIONS AND PENALTIES (a) Any person, who uses, causes to be used, or permits the use of water in violation of this ordinance is guilty of an offense punishable as provided herein; (b) Each day that a violation of this ordinance occurs is a separate offense; (c) Administrative fines may be levied for each violation of a provision of this ordinance as identified in Section 72 of this code; (d) Violation of a provision of this ordinance is subject to enforcement through installation of a flow- restricting device in the meter; (e) Each violation of this ordinance may be prosecuted as a misdemeanor punishable by imprisonment in the county jail for not more than thirty (30) days or by a fine not exceeding $1,000, or by both as provided in Water Code Section 377 and Section 72 of this code; (f) Willful violations of the mandatory conservation measures and water use restrictions as set forth in Section 11.0 and applicable during a Drought Response Level 6 condition may be enforced by discontinuing service to the property at which the violation occurs as provided by Water Code Section 356 and Section 72 of this code; (g) All remedies provided for herein shall be cumulative and not exclusive. Multi-Jurisdictional Hazard Mitigation Plan: Otay Water District Annex San Diego County, California 2023 i This page is intentionally left blank. SECTION 1 | Planning Area and Resources 2 SECTION 1: Planning Area and Resources 1.1. Planning Area: Otay Water District The Otay Water District (District) is a potable water, recycled water, and sewer services provider. The State Legislature authorized the establishment of the Otay Water District in 1956 as a California Special District under the provisions of the Municipal Water District Law of 1911, Division 20 (commencing with Section 71000) of the Water Code of the State of California. As a California Special District under the provisions of the Municipal Water District Law of 1911, Division 20 (commencing with Section 71000) of the Water Code of the State of California. Otay Water District is a "revenue neutral" public agency where each end-user pays only their fair share of the District's costs of acquiring, treating, transporting, or the operation and maintenance of the public water, recycled water, or sewer facilities. The District provides safe, reliable water service to a population of more than 226,000 within approximately 125 square miles of southeastern San Diego County, including the communities of eastern Chula Vista Bonita, Jamul, Spring Valley, Rancho San Diego, unincorporated areas of El Cajon and La Mesa, and eastern Otay Mesa along the international border with Mexico. The District's service area boundaries are nearly bounded on the northeast by the Padre Dam Municipal Water District, on the northwest by the Helix Water District, the west by the Sweetwater Authority/South Bay Irrigation District, and southwest by the City of San Diego. The southern boundary of the District is the international border with Mexico. The District provides potable water service to residential, commercial, industrial, and agricultural customers, and for environmental and fire protection uses. The potable water delivered by the District is purchased from the San Diego County Water Authority or the Helix Water District. Imported water is a mix of waters from the Colorado River and Northern California. Most of the water is purchased from the region's primary importer, the Metropolitan Water District of Southern California. The District owns and operates a wastewater collection system providing public sewer service to homes and businesses within the Jamacha drainage basin. The District also owns and operates the Ralph W. Chapman Water Reclamation Facility (RWCWRF), which produces up to 1.1 million gallons per day (MGD) of recycled water. The District has an additional recycled water source that can be purchased from the City of San Diego's South Bay Water Reclamation Plant (SBWRP). The District delivers recycled water to customers through a dedicated distribution system used to irrigate golf courses, playing fields, public parks, roadside landscapes, and open spaces in eastern Chula Vista. SECTION 1 | Planning Area and Resources 3 1.2. Community Rating System Requirements The Community Rating System (CRS) is a FEMA program that rewards communities beyond the minimum standards for floodplain management under the National Flood Insurance Program (NFIP). Communities can potentially improve their Community Rating System and lower NFIP premiums by developing a CRS Plan. For more information on the National Flood Insurance Program, see http://www.fema.gov/national-flood-insurance-program. Community Rating System (CRS) Local Mitigation Planning Handbook Tasks Planning Steps (44 CFR Part 201) Step 1. Organize Task 1: Determine the Planning Area and Resources Task 2: Build the Planning Team 44 CFR 201.6(c)(1) Step 2. Involve the public Task 3: Create an Outreach Strategy 44 CFR 201.6(b)(1) Step 3. Coordinate Task 4: Review Community Capabilities 44 CFR 201.6(b)(2) & (3) Step 4. Assess the hazard Task 5: Conduct a Risk Assessment 44 CFR 201.6(c)(2)(i) 44 CFR 201.6(c)(2)(ii) & (iii) Step 5. Assess the problem Step 6. Set goals Task 6: Develop a Mitigation Strategy 44 CFR 201.6(c)(3)(i) 44 CFR 201.6(c)(3)(ii) 44 CFR 201.6(c)(3)(iii) Step 7. Review possible activities Step 8. Draft an action plan Step 9. Adopt the Plan Task 8: Review and Adopt the Plan 44 CFR 201.6(c)(5) Step 10. Implement, evaluate, revise Task 7: Keep the Plan Current Task 9: Create a Safe and Resilient Community 44 CFR 201.6(c)(4) TABLE 1: FEMA LOCAL MITIGATION PLANNING HANDB OOK WORKSHEET 1.1 DESCRIBES THE CRS REQUIREMENTS MET BY THE SAN DIEGO COUNTY MULTI-JURISDICTIONAL HAZARD MITIGATION PLA N. Any jurisdiction or special District may participate in the hazard mitigation planning process. However, to request FEMA approval, each of the local jurisdictions must meet all requirements of 44 CFR §201.6. In addition to the requirement for participation in the process, the Federal regulation specifies the following criteria for multi-jurisdictional plans: • The risk assessment must assess each jurisdiction's risk, which they may vary from the risks facing the entire planning area. (44 CFR §201.6(c)(2)(iii)) • There must be identifiable action items specific to the jurisdiction requesting FEMA approval or credit of the Plan. (44 CFR §201.6(c)(3)(iv)) SECTION 1 | Planning Area and Resources 4 • Each jurisdiction requesting approval of the Plan must document that it has been formally adopted. (44 CFR §201.6(c)(5)) The hazard mitigation plan must clearly list the jurisdictions that participated in the Plan and seek plan approval. The San Diego County Multi-Jurisdictional Hazard Mitigation Plan (MJHMP) and annexes (Annex) meet all requirements. SECTION 2 | Planning Team 5 SECTION 2: Planning Team 2.1 Planning Participants In October 2021, the District expressed interest with the San Diego County Water Authority in developing its new plan through the County of San Diego’s Multi-Jurisdictional Hazard Mitigation Plan Five-Year Update process. The District’s hazard mitigation planning team was formed in November 2021. Representatives of the OWD attended regular planning meetings as indicated in the County’s base plan. In keeping with the recommended approaches by FEMA and the County of San Diego, the development of this Plan was overseen by the District's Hazard Mitigation Planning Team, made up of representatives from different departments in the District and other stakeholder agencies. The following members comprised the Planning Team: • Adolfo Segura, OWD, Administrative Services • Andrew Jackson, OWD, Water Operations • Charles Mederos, OWD, Water Operations • Dominique Fonseca, County of San Diego, Office of Emergency Services • Eid, Fakhouri, OWD, Finance • Eileen Salmeron, OWD, Communications • Jake Vaclavek, OWD, Water Operations • Joe Beachem, OWD, Finance • Kent Payne, OWD, Administrative Services • Kevin Koeppen, OWD, Finance • Lisa Coburn-Boyd, OWD, Engineering • Michael Kerr, OWD, Administrative Services • Nicholas, Zubel, County of San Diego, Office of Emergency Services • Rod Posada, OWD, Engineering • Tenille Otero, OWD, Communications 2.2 Planning Process The effort to develop the District's Annex and mitigation strategies was also accomplished through Microsoft Teams meetings, emails, and phone discussions. The District Planning Team members identified the Plan's objectives, discussed, and prioritized the relevant hazards to the District, conducted a review and incorporation of existing information, and prepared and reviewed mitigation strategies to address vulnerabilities. Five formal meetings were held on the following dates: SECTION 2 | Planning Team 6 • MJHMP Annex Meeting #1, November 10, 2021 • MJHMP Annex Meeting #2, December 8, 2021 • MJHMP Annex Meeting #3, January 27, 2021 • MJHMP Annex Meeting #4, February 8, 2022 • MJHMP Annex Meeting #5, April 19, 2022 The specific discussion topics are given in Table 1.5. The information to create the District's Annex was collected by feedback from the staff who participated in the review and mitigation priority setting process. Subject matter experts (SMEs) reviewed the information and provided specific input on sections pertaining to their expertise. Table 1.5 Meeting Meeting Date Discussion Topics Annex Meeting 1 November 10, 2021 Project goals and objectives, requirements for the Plan, structure, and function of the Planning Team, review, update, and incorporate existing data, public outreach strategies, critical facilities, and relevant hazards. Annex Meeting 2 December 8, 2021 Details of each hazard (location and extent, past occurrences, risk of future events, and climate change considerations), hazard mapping, hazard prioritization. Annex Meeting 3 January 27, 2022 The meeting focused on discussing hazard mitigation actions and determining potential relative cost, responsible department, and action priority. Annex Meeting 4 February 8, 2022 Review final draft of mitigation action items. Annex Meeting 5 April 19, 2022 Review the final draft of the Annex. Incorporate changes and finalize. The Plan will be monitored over the next five years to ensure the project maintains alignment and coordination with other District internal objectives, including the Capital Improvement Plan, the Water Facilities Master Plan, the Integrated Resources Plan, OWD Strategic Plan, and other District Plan Documents. See the San Diego County Multi-Jurisdictional Hazard Mitigation Plan's Section Two for details about the county-wide Planning Process. 7 SECTION 3 | Outreach Strategy SECTION 3: Outreach Strategy See the San Diego County Multi-Jurisdictional Hazard Mitigation Plan's Section Three for details about the county-wide outreach strategy. 3.1 Existing Plans or Studies Reviewed During the planning process, the Planning Team reviewed documents, emergency services documents, County and local plans, local codes and ordinances, and other similar documents. These included: • Various Local Codes and Ordinances • FEMA Local Mitigation Handbook March 2013 • FEMA Mitigation Ideas January 2013 • Local Mitigation Plan Review Tool • Otay Water District Urban Water Management Plan • Otay Water District Water Facilities Master Plan 2015 • Otay Water District Water Shortage Contingency Plan • Otay Water District's Emergency Response Plan • Otay Water District AWIA Risk and Resiliency Assessment 2018 8 SECTION 4 | Community Capabilities SECTION 4: Community Capabilities Local mitigation capabilities are existing authorities, policies, programs, and resources that reduce hazard impacts or could be used to implement hazard mitigation activities and must be included in a hazard mitigation plan by the planning team. The Planning Team also may identify additional types of capabilities relevant to mitigation planning. 4.1 Capability Assessment The primary types of capabilities for reducing long-term vulnerability through mitigation planning are: • Planning and regulatory • Administrative and technical • Financial • Education and outreach 4.2 Planning and Regulatory Planning and regulatory capabilities are the plans, policies, codes, and ordinances that prevent and reduce the impacts of hazards. The District identified the programs within its jurisdiction which can be used to address risks, identify projects and used to implement mitigation actions: Does the plan address hazards? Yes/No Does the Plan identify projects to include Plans in the mitigation strategy? Year Can the Plan be used to implement mitigation actions? Comprehensive/Master Plan Yes Yes. The Potable Plan identifies projects and can be used to implement mitigation action items. Capital Improvements Plan Yes It identifies projects for mitigation and can be used to implement mitigation actions. Economic Development Plan N/A Local Emergency Operations Plan Yes Based on the AWIA Risk and Resiliency Assessment, the District updated its Emergency Response Plan (ERP), which can be used to implement mitigation actions. 9 SECTION 4 | Community Capabilities Plans Yes/No Year Does the plan address hazards? Does the Plan identify projects to include in the mitigation strategy? Can the Plan be used to implement mitigation actions? Continuity of Operations Plan No Transportation Plan N/A Stormwater Management Plan Yes The District follows the County's Stormwater Management Plan. Community Wildfire Protection Plan Yes The District's ERP – specific hazard response plan for wildland fire can be used to implement mitigation action items. M. Real estate disclosure requirements N/A Other unique plans (e.g., brownfields redevelopment, disaster recovery, coastal zone management, climate change adaptation) N/A TABLE 2: FEMA LOCAL MITIGATION PLANNING HANDBOOK WORKSHEET 4.1 DATA. 4.3 Administrative and Technical Administrative and technical capabilities include staff and their skills and tools for mitigation planning and implementing specific mitigation actions. As a Special District, public resources in the City or County may provide technical assistance and also indicated below: Describe capability. Administration Yes/No Is coordination effective? Planner(s) or engineer(s) with knowledge of land development and land management practices Yes The District has its own Engineering Department, which includes Water Resources, Planning, Design, Environmental, Public Services, Survey, Inspection and Recycled Water Program. Engineer(s) or professional(s) trained in construction practices related to buildings and/or infrastructure Yes The District has its own Engineering Department, including Water Resources, Planning, Design, Environmental, Public Services, and Inspection. Planners or Engineer(s) with an understanding of natural and/or manmade hazards Yes The District has its own Engineering Department, including Water Resources, Planning, Design, Environmental, Public Services, and Inspection. 10 SECTION 4 | Community Capabilities Mitigation Planning Committee Yes Yes, through our Engineering Department with other Departments. Maintenance programs to reduce risk (e.g., tree trimming, clearing drainage systems) Yes Our Facility Maintenance Operations coordinates mitigation actions with other Departments. Mutual aid agreements Yes. This is coordinated through the General Manager's Office, District Departments, and three partnering water agencies. Is staffing adequate to enforce regulations? Staff Yes/No Is staff trained on hazards and mitigation? FT/PT1 Is coordination between agencies and staff effective? Chief Building Official N/A Floodplain Administrator N/A Emergency Manager N/A The Safety & Security Specialist coordinates internal staff collaboration with the SDCWA-Water Emergency Water Agency Collaborative Group, San Diego Chapter InfraGard, County of San Diego Office of Emergency Services. Surveyors Yes Yes, through our Engineering Survey Group. Staff with education or expertise to assess the community's vulnerability to hazards Yes Representatives from each operation participated in the AWIA Risk and Resilience Assessment. Community Planner N/A Scientists familiar with the hazards of the community N/A However, the District coordinates its staff with Cal Fire, the San Miguel Fire Department, and the City of Chula Vista Emergency Services. Civil Engineer Yes Yes, internal staff regularly meet to discuss regulations, hazards, and mitigation actions during pre-design, planning, and construction meetings. Personnel skilled in GIS and/or HAZUS Yes This is conducted through our GIS Group, including our GIS Manager. Grant writers No However, the District retains contracted grant writers to apply for eligible grant funds. Other TABLE 3:FEMA LOCAL MITIGATION PLANNING HANDBOOK WORKSHEET 4.1 DATA CONTINUED. 11 SECTION 4 | Community Capabilities 4.4 Financial The Planning Team has identified where the District has access to or is eligible to use the following funding resources for hazard mitigation: Has the funding resource been used in past Access/ and for what type of activities? Funding Resource Eligibility (Yes/No) Could the resource be used to fund future mitigation actions? Community Development Block Grants (CDBG) No Capital improvements project funding Yes It was used for infrastructure. It could be used to fund future mitigation actions. Authority to levy taxes for specific purposes Yes It was used for infrastructure projects. It could be used to fund future mitigation actions. Fees for water, sewer, gas, or electric service Yes It was used for infrastructure projects. It could be used to fund future mitigation actions. Impact fees for homebuyers or developers for new developments/homes Yes It was used for infrastructure projects. It could be used to fund future mitigation actions. Incur debt through general obligation bonds Yes It was used for infrastructure projects. It could be used to fund future mitigation actions. Incur debt through special tax and revenue bonds Yes It was used for infrastructure projects. It could be used to fund future mitigation actions. Incur debt through private activity bonds No Community Development Block Grants (CDBG) No Capital improvements project funding Yes It was used for infrastructure projects. It could be used to fund future mitigation actions. Authority to levy taxes for specific purposes Yes It was used for infrastructure projects. It could be used to fund future mitigation actions. How can these capabilities be expanded and improved to reduce risk? Mitigation grant funding can help the District expand and improve to reduce risks in our service areas. TABLE 4: FEMA LOCAL MITIGATION PLANNING HANDBOOK WORKSHEET 4.1 DATA CONTINUED. 12 SECTION 4 | Community Capabilities 4.5 Education and Outreach The Planning Team has identified education and outreach programs and methods already in place that could be used to implement mitigation activities, communicate hazard-related information and capabilities that can be expanded and improved to reduce risk: Describe the program/organization and how it relates to disaster resilience and mitigation. Program/Organization Yes/No Could the program/organization help implement future mitigation activities? Local citizen groups or non-profit organizations focused on environmental protection, emergency preparedness, access, functional needs populations, etc. Yes The District's Communications staff works with citizen groups and non-profits; meets with the Chamber of Commerce and Community Planning Groups Yes. Ongoing public education or information program (e.g., responsible water use, fire safety, household preparedness, environmental education) Yes Water Conservation Programs, Fire Scaping (Defensible space) to prevent wildfire hazards. Yes. Natural disaster or safety-related school programs Yes The District collaborates with the City of Chula Vista Emergency Services Group, the County of San Diego, and other organizations/municipalities/special districts to supplement disaster preparedness information. The state requires the District to conduct water testing, for example, after an earthquake, during droughts, or to evaluate lead levels. StormReady certification N/A Firewise Communities certification N/A Public-private partnership initiatives addressing disaster-related issues Yes Developers (Engineering, Public Services) irrigation meters must follow a process. Cell towers – lease space at reservoirs to AT&T, T-Mobile: creating a partnership in case of an emergency explore using these companies for assistance or communication/outreach. HOA meetings, SDG&E (PSPS) Other The District has crisis communication with response agencies such as Cal Fire. RAVE has been implemented to facilitate mass employee and public communication. Internal text capability for customers is facilitated by our Information Technology (IT) staff. Email and out dial (similar to reverse 911). It was also used during the COVID-19 pandemic event to provide water quality messaging. This was facilitated by our Customer Service, IT, and Communications staff. 13 SECTION 4 | Community Capabilities How can these capabilities be expanded and improved to reduce risk? Explore renewable energy equipment such as solar power. The District will continue to work with our energy provider and receive timely info regarding the Public Safety Power Shutoff (PSPS) to avoid significant disruption with customers' water service. TABLE 5: FEMA LOCAL MITIGATION PLANNING HANDBOOK WORKSHEET 4.1 DATA CONTINUED. 4.6 Safe Growth Audit Various growth guidance instruments and improvement plans have been evaluated to reduce vulnerability to future development. As a Special District, public resources in the City or County may provide guidance and have been referenced below: COMPREHENSIVE PLAN Land Use Yes No 1. Does the future land-use map clearly identify natural hazard areas? N/A The District defers to the County of San Diego and City of Chula Vista's comprehensive plans as it falls in their jurisdictions. 2. Do the land-use policies discourage development or redevelopment within natural hazard areas? N/A 3. Does the Plan provide adequate space for expected future growth in areas located outside natural hazard areas? N/A Transportation Yes No 1. Does the transportation plan limit access to hazard areas? N/A 2. Is transportation policy used to guide growth to safe locations? N/A 3. Are movement systems designed to function under disaster conditions (e.g., evacuation)? N/A TABLE 6: FEMA LOCAL MITIGATION PLANNING HANDBOOK WORKSHEET 4.2 DATA. 14 SECTION 4 | Community Capabilities COMPREHENSIVE PLAN (continued) Environmental Management Yes No 1. Are environmental systems that protect development from hazards identified and mapped? X The District has an Engineering/Environmental Group which manages the plans. The District also defers to the County of San Diego and City of Chula Vista's environmental management plans when they fall in their jurisdictions. 2. Do environmental policies maintain and restore protective ecosystems? X 3. Do environmental policies provide incentives to development located outside protective ecosystems? X Public Safety Yes No 1. Are the goals and policies of the comprehensive Plan related to those of the FEMA Local Hazard Mitigation Plan? N/A The District does not have a public safety operation. 2. Is safety explicitly included in the Plan's growth and development policies? N/A 3. Does the monitoring and implementation section of the Plan cover safe growth objectives? N/A TABLE 7: FEMA LOCAL MITIGATION PLANNING HANDBOOK WORKSHEET 4.2 DATA CONTINUED. 15 SECTION 4 | Community Capabilities COMPREHENSIVE PLAN (continued) Zoning Ordinance Yes No 1. Does the zoning ordinance conform to the comprehensive Plan to discourage development or redevelopment within natural hazard areas? N/A The District defers to the County of San Diego and the City of Chula Vista's zoning ordinance plans. 2. Does the ordinance contain natural hazard overlay zones that set conditions for land use within such zones? N/A 3. Do rezoning procedures recognize natural hazard areas as limits on zoning changes that allow greater intensity or density of use? N/A 4. Does the ordinance prohibit development within, or filling of, wetlands, floodways, and floodplains? N/A Subdivision Regulations Yes No 1. Do the subdivision regulations restrict the subdivision of land within or adjacent to natural hazard areas? N/A The District defers to the County of San Diego and the City of Chula Vista subdivision regulations as it falls under their jurisdictions. 2. Do the regulations provide for conservation subdivisions or cluster subdivisions in order to conserve environmental resources? N/A 3. Do the regulations allow density transfers where hazard areas exist? N/A TABLE 8: FEMA LOCAL MITIGATION PLANNING HANDBOOK WORKSHEET 4.2 DATA CONTINUED. 16 SECTION 4 | Community Capabilities COMPREHENSIVE PLAN (continued) Capital Improvement Program and Infrastructure Policies Yes No 1. Does the capital improvement program limit expenditures on projects that would encourage development in areas vulnerable to natural hazards? X 2. Do infrastructure policies limit extension of existing facilities and services that would encourage development in areas vulnerable to natural hazards? X 3. Does the capital improvement program provide funding for hazard mitigation projects identified in the FEMA Mitigation Plan? X Other Yes No 1. Do small area or corridor plans recognize the need to avoid or mitigation natural hazards? N/A 2. Does the building code contain provisions to strengthen or elevate construction to withstand hazard forces? N/A 3. Do economic development or redevelopment strategies include provisions for mitigation natural hazards? N/A 4. Is there an adopted evacuation and shelter plan to deal with emergencies from natural hazards? N/A The District coordinates with the City of Chula Vista, County of San Diego, and the SDCWA on its evaluation and shelter plans. TABLE 9: FEMA LOCAL MITIGATION PLANNING HANDBOOK WORKSHEET 4.2 DATA CONTINUED. Questions were adapted from Godschalk, David R. Practice Safe Growth Audits, Zoning Practice, Issue Number 10, October 2009, American Planning Association. 17 SECTION 4 | Community Capabilities 4.7 National Flood Insurance Program (NFIP) The District is not a participant in the National Flood Insurance Program (NFIP) as it was not identified to be a requirement under the Association of California Water Agencies (ACWA) Joint Power Insurance Authority (JPIA). ACWA JPIA provides the District's comprehensive and economical property coverage. 18 SECTION 5 | Risk Assessment SECTION 5: Risk Assessment The Planning Team conducted a risk assessment to determine the potential impacts of hazards to the community's people, economy, and built and natural environments. The risk assessment provided the foundation for the rest of the mitigation planning process, which is focused on identifying and prioritizing actions to reduce the risk of hazards. In addition to informing the mitigation strategy, the risk assessment also can be used to establish emergency preparedness and response priorities, for land use and comprehensive planning, and for decision making by elected officials, city and county departments, businesses, and organizations in the community. 5.1 Hazards Summary The Planning Team evaluated the list of natural hazards that could impact the planning area and then identified the dangers that present a great concern. The process incorporated a review of state and local hazard planning documents and local, state, and federal information on the frequency, magnitude, and costs associated with threats that have impacted or could impact the planning area. Anecdotal information regarding natural hazards and the perceived vulnerability of the planning area's assets to them was also used. Based on the review, the Team evaluated the following dangers of concern: Maximum Probable Hazard Location (Geographic Extent Probability of Overall Significance Area Affected) (Magnitude/Strength) Future Events Ranking Avalanche N/A N/A N/A N/A Dam Failure Limited Weak Unlikely Low Drought Extensive Extensive Likely High Earthquake Extensive Extensive Likely High Erosion Negligible Weak Likely Low Expansive Soils Negligible Weak Unlikely Low Extreme Cold N/A N/A N/A N/A Extreme Heat N/A N/A N/A N/A Flood N/A N/A N/A N/A Hail N/A N/A N/A N/A Hurricane N/A N/A N/A N/A 19 SECTION 5 | Risk Assessment Hazard Location (Geographic Area Affected) Maximum Probable Extent (Magnitude/Strength) Probability of Future Events Overall Significance Ranking Landslide N/A N/A N/A N/A Lightning Limited Weak Likely Low Sea Level Rise N/A N/A N/A N/A Severe Wind Extensive Weak Likely Medium Severe Winter Weather Extensive Weak Likely Medium Storm Surge N/A N/A N/A N/A Subsidence N/A N/A N/A N/A Tornado N/A N/A N/A N/A Tsunami N/A N/A N/A N/A Wildfire Significant Significant Significant Significant TABLE 10: FEMA LOCAL MITIGATION PLANNING HANDBOOK WORKSHEET 5.1 DATA. Definitions for Classifications Location (Geographic Area Affected) • Negligible: Less than 10 percent of planning area or isolated single-point occurrences • Limited: 10 to 25 percent of the planning area or little single-point occurrences • Significant: 25 to 75 percent of planning area or frequent single-point occurrences • Extensive: 75 to 100 percent of planning area or consistent single-point occurrences Maximum Probable Extent (Magnitude/Strength based on historic events or future probability) • Weak: Limited classification on scientific scale, slow speed of onset or short duration of event, resulting in little to no damage • Moderate: Moderate classification on scientific scale, moderate speed of onset or moderate duration of event, resulting in some damage and loss of services for days • Severe: Severe classification on scientific scale, fast speed of onset or long duration of event, resulting in devastating damage and loss of services for weeks or months • Extreme: Extreme classification on scientific scale, immediate onset or extended duration of event, resulting in catastrophic damage and uninhabitable conditions 20 SECTION 5 | Risk Assessment Hazard Scale / Index Weak Moderate Severe Extreme Drought Palmer Drought Severity Index3 -1.99 to +1.99 -2.00 to -2.99 -3.00 to -3.99 -4.00 and below Earthquake Modified Mercalli Scale4 I to IV V to VII VII IX to XII Richter Magnitude5 2, 3 4, 5 6 7, 8 Hurricane Wind Saffir-Simpson Hurricane Wind Scale6 1 2 3 4, 5 Tornado Fujita Tornado Damage Scale7 F0 F1, F2 F3 F4, F5 Probability of Future Events • Unlikely: Less than 1 percent probability of occurrence in the next year or a recurrence interval of greater than every 100 years. • Occasional: 1 to 10 percent probability of occurrence in the next year or a recurrence interval of 11 to 100 years. • Likely: 10 to 90 percent probability of occurrence in the next year or a recurrence interval of 1 to 10 years • Highly Likely: 90 to 100 percent probability of occurrence in the next year or a recurrence interval of less than 1 year. Overall Significance • Low: Two or more criteria fall in lower classifications, or the event has a minimal impact on the planning area. This rating is sometimes used for hazards with a minimal or unknown record of occurrences or for hazards with minimal mitigation potential. • Medium: The criteria fall mostly in the middle ranges of classifications and the event's impacts on the planning area are noticeable but not devastating. This rating is sometimes used for hazards with a high extent rating but very low probability rating. • High: The criteria consistently fall in the high classifications and the event is likely/highly likely to occur with severe strength over a significant to extensive portion of the planning area. o Cumulative meteorological drought and wet conditions: http://ncdc.noaa.gov/ o Earthquake intensity and effect on population and structures: http://earthquake.usgs.gov o Earthquake magnitude as a logarithmic scale, measured by a seismograph: http://earthquake.usgs.gov o Hurricane rating based on sustained wind speed: http://nhc.noaa.gov o Tornado rating based on wind speed and associated damage: http://spc.noaa.gov 21 SECTION 6 | Develop a Mitigation Strategy SECTION 6: Mitigation Strategy The mitigation strategy serves as the long-term blueprint for reducing potential losses identified in the risk assessment. The mitigation strategy describes how the District will accomplish the overall purpose, or mission, of the planning process. The mitigation strategy is made up of three main required components: mitigation goals, mitigation actions, and an action plan for implementation. These provide the framework to identify, prioritize, and implement actions to reduce risk to hazards. Mitigation goals are general guidelines that explain what the community wants to achieve with the Plan They are usually broad policy-type statements that are long-term, and they represent visions for reducing or avoiding losses from the identified hazards Mitigation actions are specific projects and activities that help achieve the goals. The action plan describes how the mitigation actions will be implemented, including how those actions will be prioritized, administered, and incorporated into the community's existing planning mechanisms. In a multi-jurisdictional plan, each jurisdiction must have an action plan specific to that jurisdiction and its vulnerabilities. The District choose to develop objectives to help define or organize mitigation actions. Objectives are broader than specific actions, but are measurable, unlike goals. Objectives connect goals with the actual mitigation actions. The following goals were set for this hazard mitigation plan: 1. Protect life and property. 2. Maintain continuity of essential water and sewer services. 3. Increase public awareness of the risks of loss of water/sewer service. 4. Facilitate partnerships with recognized stakeholders within the Otay Water District and implement a coordination plan between the stakeholders 5. Protect local water supply sources. 6. Protect against environmental consequences caused by water and sewer system failure initiated by natural hazards. SECTION 6 | Develop a Mitigation Strategy 22 6.1 Mitigation Action Evaluation The District used the FEMA Worksheet 6.1 to help evaluate and prioritize each mitigation action being considered by the planning team. For each action, the Team evaluated the potential benefits and/or likelihood of successful implementation for the criteria defined below. Rank each of the criteria with a -1, 0 or 1 using the following scale: • 1 = Highly effective or feasible • 0 = Neutral • -1 = Ineffective or not feasible Example Evaluation Criteria: • Life Safety – How effective will the action be at protecting lives and preventing injuries? • Property Protection – How significant will the action be at eliminating or reducing damage to structures and infrastructure? • Technical – Is the mitigation action technically feasible? Is it a long-term solution? Eliminate actions that, from a technical standpoint, will not meet the goals. • Political – Is there overall public support for the mitigation action? Is there the political will to support it? • Legal – Does the community have the authority to implement the action? • Environmental – What are the potential environmental impacts of the action? Will it comply with environmental regulations? • Social – Will the proposed action adversely affect one segment of the population? Will the action disrupt established neighborhoods, break up voting districts, or cause the relocation of lower income people? • Administrative – Does the community have the personnel and administrative capabilities to implement the action and maintain it or will outside help be necessary? • Local Champion – Is there a strong advocate for the action or project among local departments and agencies that will support the action's implementation? • Other Community Objectives – Does the action advance other community objectives, such as capital improvements, economic development, environmental quality, or open space preservation? Does it support the policies of the comprehensive Plan? SECTION 6 | Develop a Mitigation Strategy 23 Other Mitigation Action Life Property Technical Political Legal Environ Social Admini Local Community Total Safety Protection mental strative Champion Objectives Score Local Plans and Regulations OWD Climate Action Plan 1 0 1 1 1 1 1 1 1 1 9 Enhance recycled water use in the District. 1 0 1 1 1 1 0 1 1 1 8 Structure and Infrastructure Projects Seismic retrofits for District infrastructure 1 1 1 0 1 1 1 1 1 1 9 Wildfire Mitigation - Ensuring adequate defensible space around existing infrastructure 1 1 1 1 1 0 0 1 1 1 8 Natural Systems Protection Dam Failure - Flash Flood Control and Prevention 1 1 1 1 1 1 1 1 1 1 10 Education and Awareness Programs Enhance drought awareness and water conservation programs 1 1 1 1 1 1 1 1 1 1 10 Develop awareness program for San Miguel HMA to discourage vandalism 0 1 1 0 1 1 0 1 0 0 5 TABLE 11: FEMA LOCAL MITIGATION PLANNING HANDBOOK WORKSHEET 6.1 DATA. 6.2 Mitigation Action Implementation A mitigation action is a specific action, project, activity, or process taken to reduce or eliminate long-term risk from hazards and their impacts on people and property. Implementing mitigation actions helps achieve the Plan's mission and goals. The efforts to reduce vulnerability to threats and risks form the core of the Plan and are a vital outcome of the planning process. This Annex details the following mitigation action implementations: The Planning Committee selected actions in a hazard mitigation action plan based on the risk assessment of identified hazards of concern and the defined hazard mitigation goals and objectives. Table 6.3 lists the recommended hazard mitigation actions that make up the action plan. 24 SECTION 6 I Develop a Mitigation Strategy 6.3 Hazard Mitigation Action Plan Matrix The timeframe indicated in the table is defined as follows: • Short-term = Completion within 5 years • Long-term = Completion within 10 years Table 6.3 – Hazard Mitigation Action Plan Matrix Applies to New or Existing Assets Priority Lead Agency Support Agency Estimated Cost Sources of Funding Timeline Action #1 – Increase recycled water use within the service area Hazards Mitigated: Water shortage during drought periods New High OWD City of San Diego, RWQCB, and Sweetwater Authority Low ($75,000) FEMA HMA Grants, District Funds Short Term Action #2 – Educate residents on water-saving techniques Hazards Mitigated: Water shortage during drought periods New High OWD SDCWA, MWDSC, DWR, CCEDC, HOAs, County of SD, Schools, Local Municipalities, Businesses, and Developers Low ($250,000) FEMA HMA Grants, District Funds Short Term Action #3 – Conduct a seismic evaluation of existing critical facilities and develop an inventory of buildings that may be particularly vulnerable to earthquake damage. Prioritize the list of essential facilities to be seismically upgraded or retrofitted. Hazards Mitigated: Human and Property Loss New High OWD N/A Low ($75,000) FEMA HMA Grants, District Funds Short Term Action #4 – Conduct seismic retrofitting for critical facilities most at risk of earthquakes Hazards Mitigated: Human and Property Loss New Medium OWD N/A Medium ($500,000) FEMA HMA Grants, District Funds Long Term Action #5 – Upgrade the access road at the La Presa Potable Pump Station 10-04 Hazards Mitigated: Wildfire and Heavy Rainstorms New Medium OWD N/A Medium ($750,000) FEMA HMA Grants, District Funds Short Term Action #6 – Upgrade the access road at the Regulatory Pump Station 832-1 and 832-2 Hazards Mitigated: Wildfire and Heavy Rainstorms New Medium OWD Cal Fire Medium ($1,500,000) FEMA HMA Grants, District Funds Short Term 25 SECTION 6 I Develop a Mitigation Strategy Table 6.3 – Hazard Mitigation Action Plan Matrix Applies to New or Existing Assets Priority Lead Agency Support Agency Estimated Cost Sources of Funding Timeline Action #7 – Develop dam failure flood preparedness, response, and communications plan. Hazards Mitigated: Flood New Medium OWD N/A Low ($75,000) FEMA HMA Grants, District Funds Short Term Action #8 – Create defensible space around critical structures and infrastructure Hazards Mitigated: Wildfire New Medium OWD Cal Fire, US Fish & Wildlife, CA Dept Fish& Wildlife Low ($200,000) FEMA HMA Grants, District Funds Short Term Action #9 – Develop the District’s Climate Action Plan (CAP). Hazards Mitigated: Flood, Wildfire, Extreme Heat, and Heavy Rainstorms New Medium OWD N/A Medium ($290,000) FEMA HMA Grants, District Funds Short Term Action #10 – Implement security protection for the San Miguel Habitat Management Area. Hazards Mitigated: Trespassing and vandalism New Medium OWD USFWS, CDFW CA Conservation Corp Low ($80,000) FEMA HMA Grants, District Funds Short Term 26 SECTION 7 | Keep the Plan Current SECTION 7: Keep the Plan Current Hazard Mitigation Plan (Annex) maintenance is the process the planning team establishes to track the Plan's implementation progress and to inform the plan update. The Plan must include a description of the method and a monitoring schedule, evaluating and updating it within a 5-year cycle. These procedures help to: • Ensure that the mitigation strategy is implemented according to the Plan. • Provide the foundation for an ongoing mitigation program in your community. • Standardize long-term monitoring of hazard-related activities. • Integrate mitigation principles into community officials' daily job responsibilities and department roles. • Maintain momentum through continued engagement and accountability in the Plan's progress. Hazard Mitigation Plan updates provide the opportunity to consider how well the procedures established in the previously approved Plan worked and revise them as needed. This Annex is part of the most recent San Diego County Multi-Jurisdictional Hazard Mitigation Plan update. The Plan was last updated in 2018. See the San Diego County Multi-Jurisdictional Hazard Mitigation Plan for more information. 7.1 Mitigation Action Progress Plan monitoring means tracking the implementation of the Plan over time. The Plan must identify how, when, and by whom the plan will be monitored. The District will track the mitigation actions for the next five-year cycle. The Planning Team will meet at least annually to monitor implementation progress and integration of mitigation actions into other documents. As part of this evaluation process, members of the Team ZLOO UHIHUHQFH $SSHQGL[ $ 5HJLRQ ,; /RFDO +D]DUG 0LWLJDLWRQ 3ODQ 5HYLHZ 7RRO DQG should review the following: • Any hazard events that occurred within the District's boundaries in the past year, including the scale of impact. • Mitigation activities in the Plan have been implemented and are achieving success. • The timeline for implementing mitigation activities and whether the timeline should be amended. • Any mitigation activities prioritized for the past year have not been completed, and why. • The need for any new or revised mitigation actions. • Any changes or potential for changes in funding options for mitigation activities. • Any new scientific data or mapping that informs the information in the Plan. SECTION 8 | Appendices SECTION 8: Appendices 27 FEMA Region IX Local Hazard Mitigation Plan Review Tool 1 APPENDIX A REGION IX LOCAL HAZARD MITIGATION PLAN REVIEW TOOL Updated 12/4/2019 The Local Hazard Mitigation Plan Review Tool demonstrates how the Local Hazard Mitigation Plan meets the regulation in 44 CFR §201.6 and offers State and FEMA Mitigation Planners an opportunity to provide feedback to the community. • The Regulation Checklist provides a summary of FEMA’s evaluation of whether the plan has addressed all requirements. • The Plan Assessment identifies the plan’s strengths as well as documents areas for future improvement. This section also includes a list of resources for implementation of the plan. • The Multi-Jurisdiction Summary Sheet is a mandatory worksheet for multi-jurisdictional plans that is used to document which jurisdictions are eligible to adopt the plan. • The Hazard Identification and Risk Assessment Matrix is a tool for plan reviewers to identify if all components of Element B are met. Jurisdiction: County of San Diego Title of Plan: MJHMP OWD Annex 2023 Date of Plan: June 2023 Local Point of Contact: Emilyn B. Zuniga Address: 2554 Sweetwater Springs Blvd Spring Valley, CA 91978 Title: Safety and Security Specialist Agency: Otay Water District Phone Number: 619-670-2295 E-Mail: ezuniga@otaywater.gov State Reviewer: Title: Date: Date Received at State Agency Date Sent to FEMA FEMA Reviewer: Title: Date: Date Received in FEMA Region IX Date Not Approved Date Approvable Pending Adoption Date Approved 2 FEMA Region IX Local Mitigation Plan Review Tool SECTION 1: REGULATION CHECKLIST INSTRUCTIONS: The Regulation Checklist must be completed by FEMA. The purpose of the Checklist is to identify the location of relevant or applicable content in the plan by element/sub- element and to determine if each requirement has been ‘Met’ or ‘Not Met.’ The ‘Required Revisions’ summary at the bottom of each element must be completed by FEMA to provide a clear explanation of the revisions that are required for plan approval. Required revisions must be explained for each plan sub-element that is ‘Not Met.’ Sub-elements should be referenced in each summary by using the appropriate numbers (A1, B3, etc.), where applicable. Requirements for each Element and sub-element are described in detail in the Local Plan Review Guide in Section 4, Regulation Checklist. 1. REGULATION CHECKLIST Regulation (44 CFR 201.6 Local Mitigation Plans) Location in Plan (section and/or page number) Met Not Met ELEMENT A. PLANNING PROCESS A1. Does the plan document the planning process, including how it was prepared and who was involved in the process for each jurisdiction? (Requirement §201.6(c)(1)) a. Does the plan provide documentation of how the plan was prepared? This documentation must include the schedule or timeframe and activities that made up the plan’s development as well as who was involved. b. Does the plan list the jurisdiction(s) participating in the plan that are seeking approval? c. Does the plan identify who represented each jurisdiction? (At a minimum, it must identify the jurisdiction represented and the person’s position or title and agency within the jurisdiction.) A2. Does the plan document an opportunity for neighboring communities, local and regional agencies involved in hazard mitigation activities, agencies that have the authority to regulate development as well as other interests to be involved in the planning process? (Requirement §201.6(b)(2)) a. Does the plan document an opportunity for neighboring communities, local, and regional agencies involved in hazard mitigation activities, agencies that have the authority to regulate development, as well as other interested parties to be involved in the planning process? b. Does the plan identify how the stakeholders were invited to participate in the process? A3. Does the plan document how the public was involved in the planning a. Does the plan document how the public was given the opportunity to be involved in the planning process? 1. REGULATION CHECKLIST Regulation (44 CFR 201.6 Local Mitigation Plans) Location in Plan (section and/or page number) Met Not Met process during the drafting stage? (Requirement §201.6(b)(1)) b. Does the plan document how the public’s feedback was incorporated into the plan? A4. Does the plan describe the review and incorporation of existing plans, studies, reports, and technical information? (Requirement §201.6(b)(3)) A5. Is there discussion of how the community(ies) will continue public participation in the plan maintenance process? (Requirement §201.6(c)(4)(iii)) A6. Is there a description of the method and schedule for keeping the plan current (monitoring, evaluating and updating the mitigation plan within a 5- year cycle)? (Requirement §201.6(c)(4)(i)) a. Does the plan identify how, when, and by whom the plan will be monitored (how will implementation be tracked) over time? b. Does the plan identify how, when, and by whom the plan will be evaluated (assessing the effectiveness of the plan at achieving stated purpose and goals) over time? c. Does the plan identify how, when, and by whom the plan will be updated during the 5-year cycle? ELEMENT A: REQUIRED REVISIONS ELEMENT B. HAZARD IDENTIFICATION AND RISK ASSESSMENT (Reviewer: See Section 4 for assistance with Element B) B1. Does the plan include a description of the type, location, and extent of all natural hazards that can affect each jurisdiction(s)? (Requirement §201.6(c)(2)(i)) a. Does the plan include a general description of all natural hazards that can affect each jurisdiction? b. Does the plan provide rationale for the omission of any natural hazards that are commonly recognized to affect the jurisdiction(s) in the planning area? c. Does the plan include a description of the type of all natural hazards that can affect each jurisdiction? d. Does the plan include a description of the location for all natural hazards that can affect each jurisdiction? e. Does the plan include a description of the extent for all natural hazards that can affect each jurisdiction? B2. Does the plan include information on previous occurrences of hazard events and on the probability of future hazard a. Does the plan include information on previous occurrences of hazard events for each jurisdiction? FEMA Region IX Local Hazard Mitigation Plan Review Tool 3 1. REGULATION CHECKLIST Regulation (44 CFR 201.6 Local Mitigation Plans) Location in Plan (section and/or page number) Met Not Met events for each jurisdiction? (Requirement §201.6(c)(2)(i)) b. Does the plan include information on the probability of future hazard events for each jurisdiction? B3. Is there a description of each identified hazard’s impact on the community as well as an overall summary of the community’s vulnerability for each jurisdiction? (Requirement §201.6(c)(2)(ii)) a. Is there a description of each hazard’s impacts on each jurisdiction (what happens to structures, infrastructure, people, environment, etc.)? b. Is there a description of each identified hazard’s overall vulnerability (structures, systems, populations, or other community assets defined by the community that are identified as being susceptible to damage and loss from hazard events) for each jurisdiction? B4. Does the plan address NFIP insured structures within the jurisdiction that have been repetitively damaged by floods? (Requirement §201.6(c)(2)(ii)) ELEMENT B: REQUIRED REVISIONS ELEMENT C. MITIGATION STRATEGY C1. Does the plan document each jurisdiction’s existing authorities, policies, programs and resources and its ability to expand on and improve these existing policies and programs? (Requirement §201.6(c)(3)) a. Does the plan document each jurisdiction’s existing authorities, policies, programs and resources? b. Does the plan document each jurisdiction’s ability to expand on and improve these existing policies and programs? C2. Does the plan address each jurisdiction’s participation in the NFIP and continued compliance with NFIP requirements, as appropriate? (Requirement §201.6(c)(3)(ii)) C3. Does the plan include goals to reduce/avoid long-term vulnerabilities to the identified hazards? (Requirement §201.6(c)(3)(i)) C4. Does the plan identify and analyze a comprehensive range of specific mitigation actions and projects for each jurisdiction being considered to reduce the effects of hazards, with emphasis on new and existing buildings and infrastructure? (Requirement §201.6(c)(3)(ii)) a. Does the plan identify and analyze a comprehensive range of specific mitigation actions and projects to reduce the impacts from hazards? b. Does the plan identify mitigation actions for every hazard posing a threat to each participating jurisdiction? 4 FEMA Region IX Local Mitigation Plan Review Tool 1. REGULATION CHECKLIST Regulation (44 CFR 201.6 Local Mitigation Plans) Location in Plan (section and/or page number) Met Not Met c. Do the identified mitigation actions and projects have an emphasis on new and existing buildings and infrastructure? C5. Does the plan contain an action plan that describes how the actions identified will be prioritized (including cost benefit review), implemented, and administered by each jurisdiction? (Requirement §201.6(c)(3)(iv)); (Requirement §201.6(c)(3)(iii)) a. Does the plan explain how the mitigation actions will be prioritized (including cost benefit review)? b. Does the plan identify the position, office, department, or agency responsible for implementing and administering the action, potential funding sources and expected timeframes for completion? C6. Does the plan describe a process by which local governments will integrate the requirements of the mitigation plan into other planning mechanisms, such as comprehensive or capital improvement plans, when appropriate? (Requirement §201.6(c)(4)(ii)) a. Does the plan identify the local planning mechanisms where hazard mitigation information and/or actions may be incorporated? b. Does the plan describe each community’s process to integrate the data, information, and hazard mitigation goals and actions into other planning mechanisms? c. The updated plan must explain how the jurisdiction(s) incorporated the mitigation plan, when appropriate, into other planning mechanisms as a demonstration of progress in local hazard mitigation efforts. ELEMENT C: REQUIRED REVISIONS ELEMENT D. PLAN REVIEW, EVALUATION, AND IMPLEMENTATION (Applicable to plan updates only) D1. Was the plan revised to reflect changes in development? (Requirement §201.6(d)(3)) D2. Was the plan revised to reflect progress in local mitigation efforts? (Requirement §201.6(d)(3)) D3. Was the plan revised to reflect changes in priorities? (Requirement §201.6(d)(3)) ELEMENT D: REQUIRED REVISIONS ELEMENT E. PLAN ADOPTION FEMA Region IX Local Hazard Mitigation Plan Review Tool 5 1. REGULATION CHECKLIST Regulation (44 CFR 201.6 Local Mitigation Plans) Location in Plan (section and/or page number) Met Not Met E1. Does the plan include documentation that the plan has been formally adopted by the governing body of the jurisdiction requesting approval? (Requirement §201.6(c)(5)) E2. For multi-jurisdictional plans, has each jurisdiction requesting approval of the plan documented formal plan adoption? (Requirement §201.6(c)(5)) ELEMENT E: REQUIRED REVISIONS OPTIONAL: HIGH HAZARD POTENTIAL DAM RISKS (Applicable to jurisdictions interested in becoming sub applicants to FEMA’s Rehabilitation of High Hazard Potential Dams (HHPD) Grant Program only) HHPD1. Did Element A4 (planning process) describe the incorporation of existing plans, studies, reports, and technical information for high hazard potential dams? HHPD2. Did Element B3 (risk assessment) address HHPDs? HHPD3. Did Element C3 (mitigation goals) include mitigation goals to reduce long- term vulnerabilities from high hazard potential dams that pose an unacceptable risk to the public? HHPD4. Did Element C4-C5 (mitigation actions) address HHPDs prioritize mitigation actions to reduce vulnerabilities from high hazard potential dams that pose an unacceptable risk to the public? REQUIRED REVISIONS ELEMENT F. ADDITIONAL STATE REQUIREMENTS (Optional for State Reviewers only; not to be completed by FEMA) F1. F2. ELEMENT F: REQUIRED REVISIONS 6 FEMA Region IX Local Mitigation Plan Review Tool FEMA Region IX Local Hazard Mitigation Plan Review Tool 7 SECTION 2: PLAN ASSESSMENT INSTRUCTIONS: The purpose of the Plan Assessment is to offer the local community more comprehensive feedback to the community on the quality and utility of the plan in a narrative format. The audience for the Plan Assessment is not only the plan developer/local community planner, but also elected officials, local departments and agencies, and others involved in implementing the Local Mitigation Plan. The Plan Assessment must be completed by FEMA. The Assessment is an opportunity for FEMA to provide feedback and information to the community on: 1) suggested improvements to the Plan; 2) specific sections in the Plan where the community has gone above and beyond minimum requirements; 3) recommendations for plan implementation; and 4) ongoing partnership(s) and information on other FEMA programs, specifically RiskMAP and Hazard Mitigation Assistance programs. The Plan Assessment is divided into two sections: 1. Plan Strengths and Opportunities for Improvement 2. Resources for Implementing Your Approved Plan Plan Strengths and Opportunities for Improvement is organized according to the plan Elements listed in the Regulation Checklist. Each Element includes a series of italicized bulleted items that are suggested topics for consideration while evaluating plans, but it is not intended to be a comprehensive list. FEMA Mitigation Planners are not required to answer each bullet item and should use them as a guide to paraphrase their own written assessment (2-3 sentences) of each Element. The Plan Assessment must not reiterate the required revisions from the Regulation Checklist or be regulatory in nature and should be open-ended and to provide the community with suggestions for improvements or recommended revisions. The recommended revisions are suggestions for improvement and are not required to be made for the Plan to meet Federal regulatory requirements. The italicized text should be deleted once FEMA has added comments regarding strengths of the plan and potential improvements for future plan revisions. It is recommended that the Plan Assessment be a short synopsis of the overall strengths and weaknesses of the Plan (no longer than two pages), rather than a complete recap section by section. Resources for Implementing Your Approved Plan provides a place for FEMA to offer information, data sources and general suggestions on the plan implementation and maintenance process. Information on other possible sources of assistance including, but not limited to, existing publications, grant funding or training opportunities, can be provided. States may add state and local resources, if available. 8 FEMA Region IX Local Mitigation Plan Review Tool A. Plan Strengths and Opportunities for Improvement This section provides a discussion of the strengths of the plan document and identifies areas where these could be improved beyond minimum requirements. Element A: Planning Process How does the Plan go above and beyond minimum requirements to document the planning process with respect to: • Involvement of stakeholders (elected officials/decision makers, plan implementers, business owners, academic institutions, utility companies, water/sanitation districts, etc.); • Involvement of Planning, Emergency Management, Public Works Departments or other planning agencies (i.e., regional planning councils); • Diverse methods of participation (meetings, surveys, online, etc.); and • Reflective of an open and inclusive public involvement process. Element B: Hazard Identification and Risk Assessment In addition to the requirements listed in the Regulation Checklist, 44 CFR 201.6 Local Mitigation Plans identifies additional elements that should be included as part of a plan’s risk assessment. The plan should describe vulnerability in terms of: 1) A general description of land uses and future development trends within the community so that mitigation options can be considered in future land use decisions; 2) The types and numbers of existing and future buildings, infrastructure, and critical facilities located in the identified hazard areas; and 3) A description of potential dollar losses to vulnerable structures, and a description of the methodology used to prepare the estimate. How does the Plan go above and beyond minimum requirements to document the Hazard Identification and Risk Assessment with respect to: • Use of best available data (flood maps, HAZUS, flood studies) to describe significant hazards; • Communication of risk on people, property, and infrastructure to the public (through tables, charts, maps, photos, etc.); • Incorporation of techniques and methodologies to estimate dollar losses to vulnerable structures; • Incorporation of Risk MAP products (i.e., depth grids, Flood Risk Report, Changes Since Last FIRM, Areas of Mitigation Interest, etc.); and • Identification of any data gaps that can be filled as new data became available. FEMA Region IX Local Hazard Mitigation Plan Review Tool 9 Element C: Mitigation Strategy How does the Plan go above and beyond minimum requirements to document the Mitigation Strategy with respect to: • Key problems identified in, and linkages to, the vulnerability assessment; • Serving as a blueprint for reducing potential losses identified in the Hazard Identification and Risk Assessment; • Plan content flow from the risk assessment (problem identification) to goal setting to mitigation action development; • An understanding of mitigation principles (diversity of actions that include structural projects, preventative measures, outreach activities, property protection measures, post- disaster actions, etc); • Specific mitigation actions for each participating jurisdiction that reflects their unique risks and capabilities; • Integration of mitigation actions with existing local authorities, policies, programs, and resources; and • Discussion of existing programs (including the NFIP), plans, and policies that could be used to implement mitigation, as well as document past projects. Element D: Plan Update, Evaluation, and Implementation (Plan Updates Only) How does the Plan go above and beyond minimum requirements to document the 5-year Evaluation and Implementation measures with respect to: • Status of previously recommended mitigation actions; • Identification of barriers or obstacles to successful implementation or completion of mitigation actions, along with possible solutions for overcoming risk; • Documentation of annual reviews and committee involvement; • Identification of a lead person to take ownership of, and champion the Plan; • Reducing risks from natural hazards and serving as a guide for decisions makers as they commit resources to reducing the effects of natural hazards; • An approach to evaluating future conditions (i.e. socio-economic, environmental, demographic, change in built environment etc.); • Discussion of how changing conditions and opportunities could impact community resilience in the long term; and • Discussion of how the mitigation goals and actions support the long-term community vision for increased resilience. 10 FEMA Region IX Local Mitigation Plan Review Tool B. Resources for Implementing and Updating Your Approved Plan This resource section is organized into three categories: 1) Guidance and Resources 2) Training Topics and Courses 3) Funding Sources Guidance and Resources Local Mitigation Planning Handbook https://www.fema.gov/media-library/assets/documents/31598 Beyond the Basics http://mitigationguide.org/ Mitigation Ideas https://www.fema.gov/media-library/assets/documents/30627 Plan Integration: Linking Local Planning Efforts https://www.fema.gov/media-library/assets/documents/108893 Integrating Disaster Data into Hazard Mitigation Planning https://www.fema.gov/media-library/assets/documents/103486 Integrating Historic Property and Cultural Resource Considerations into Hazard Mitigation Planning https://www.fema.gov/ar/media-library/assets/documents/4317 Community Rating System User Manual https://www.fema.gov/media-library/assets/documents/8768 U.S. Climate Resilient Toolkit https://toolkit.climate.gov/ 2014 National Climate Assessment http://nca2014.globalchange.gov/ Managing the Risks of Extreme Events and Disasters to Advance Climate Change Adaptation http://ipcc-wg2.gov/SREX/images/uploads/SREX-All_FINAL.pdf FY15 Hazard Mitigation Assistance Unified Guidance https://www.fema.gov/media-library/assets/documents/103279 Climate Resilient Mitigation Activities for Hazard Mitigation Assistance https://www.fema.gov/media-library/assets/documents/110202 Training More information at https://training.fema.gov/emi.aspx or through your State Training Officer Mitigation Planning IS-318 Mitigation Planning for Local and Tribal Communities https://training.fema.gov/is/courseoverview.aspx?code=is-318 IS-393 Introduction to Hazard Mitigation https://training.fema.gov/is/courseoverview.aspx?code=is-393.a G-318 Preparing and Reviewing Local Plans G-393 Mitigation for Emergency Managers FEMA Region IX Local Hazard Mitigation Plan Review Tool 11 Hazard Mitigation Assistance (HMA) Grant Programs IS-212.b Introduction to Unified HMA http://www.training.fema.gov/is/courseoverview.aspx?code=IS-212.b IS-277 Benefit Cost Analysis Entry Level http://www.training.fema.gov/is/courseoverview.aspx?code=IS-277 E-212 HMA: Developing Quality Application Elements E-213 HMA: Application Review and Evaluation E-214 HMA: Project Implementation and Programmatic Closeout E-276 Benefit-Cost Analysis Entry Level GIS and Hazus-MH IS-922 Application of GIS for Emergency Management http://www.training.fema.gov/is/courseoverview.aspx?code=IS-922 E-190 ArcGIS for Emergency Managers E-296 Application of Hazus-MH for Risk Assessment E-313 Basic Hazus-MH Floodplain Management E-273 Managing Floodplain Development through the NFIP E-278 National Flood Insurance Program/ Community Rating System Potential Funding Sources Hazard Mitigation Grant Program POC: FEMA Region IX and State Hazard Mitigation Officer Website: https://www.fema.gov/hazard-mitigation-grant-program Pre-Disaster Mitigation Grant Program POC: FEMA Region IX and State Hazard Mitigation Officer Website: https://www.fema.gov/pre-disaster-mitigation-grant-program Flood Mitigation Assistance Grant Program POC: FEMA Region IX and State Hazard Mitigation Officer Website: https://www.fema.gov/flood-mitigation-assistance-grant-program Emergency Management Performance Grant Program POC: FEMA Region IX Website: https://www.fema.gov/emergency-management-performance-grant-program SECTION 3: MULTI-JURISDICTIONAL SUMMARY SHEET INSTRUCTIONS: For multi-jurisdictional plans, this summary sheet must be completed by listing each participating jurisdiction that is eligible to adopt the plan. MULTI-JURISDICTION SUMMARY SHEET # Jurisdiction Name Jurisdiction Type Eligible to Adopt the Plan? Plan POC Email 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 12 FEMA RIX Local Mitigation Plan Review Tool SECTION 4: HAZARD IDENTIFICATION AND RISK ASSESSMENT MATRIX (OPTIONAL) INSTRUCTIONS: This matrix can be used by the plan reviewer to help identify if all of the components of Element B have been met. List out natural hazard names that are identified in the plan in the column labeled “Hazards” and put a “Y” or “N” for each component of Element B. HAZARD IDENTIFICATION AND RISK ASSESSMENT MATRIX Requirement Met? (Y/N) Hazard Type Location Extent Previous Occurrences Probability Impacts Vulnerability Mitigation Action 13 FEMA RIX Local Mitigation Plan Review Tool Otay Water District 2025 Urban Water Management Plan June 2026 APPENDIX H: DISTRICT CODE OF ORDINANCES Section 26 Water Recycling Plan and Implementing Procedures Section 39 Drought Response Conservation Program 26-1 SECTION 26 WATER RECYCLING PLAN AND IMPLEMENTING PROCEDURES 26.01 FINDINGS The state policies regarding use of recycled water are in the best interest of the Otay Water District. The majority of jurisdictions in San Diego County have adopted measures to promote water reclamation. This ordinance is necessary to protect the common water supply of the region which is vital to public health and safety, and to prevent endangerment of public and private property. San Diego County is highly dependent on limited imported water for domestic, agricultural and industrial uses. The reliability of the supply of imported water is uncertain. By developing and utilizing recycled water, the need for additional imported water can be reduced. In light of these circumstances, certain uses of potable water may be considered unreasonable or to constitute a nuisance where recycled water is available. 26.02 USE OF RECYCLED WATER A.District Policy: It is the policy of the Dis- trict that recycled water shall be used within the jurisdiction wherever its use is financially and technically feasible, and consistent with legal requirements, preservation of public health, safety and welfare, and the environment. A customer’s recycled water service must at all time be in compliance with any requirements of service, including but not limited to the requirements established under this Section 26, the District’s Rules and Regulations for Recycled Water Use, the California Water Code, commencing with Section 13520, the California Health and Safety Code, Section 116555, the California Code of Regulations, Titles 17 and 22, and Water Agency Standards. B.Required Use for Greenbelt Purposes: Pursuant to Section 13550 of the California Water Code, no customer of the District shall make, cause, use or permit the use of potable water supplied by the District for greenbelt uses, including, but not limited to, cemeteries, golf courses, parks and highway landscaped areas, when, following notice and a hearing, the District finds that recycled water is available for such greenbelt uses and that the following conditions are met: 1.the recycled water is of adequate quality; 26-2 2.the recycled water may be furnished to such areas at a reasonable cost, comparable to or less than the cost of supplying potable domestic water; 3.the State Department of Health Services has determined that such use would not be detri- mental to public health; and 4.the use of recycled water will not adversely affect downstream water rights, will not degrade water quality. The findings may include terms and conditions under which recycled water shall be used. In addition, the District may assist the customer in obtaining any permits or approvals required for the use of recycled water. 26.03 DEFINITIONS The following terms are defined for purposes of this ordinance: A.Agricultural Purposes: Agricultural purposes include the growing of field and nursery crops, row crops, trees, and vines and the feeding of fowl and livestock. B.Artificial Lake: A human-made lake, pond, lagoon, or other body of water that is used wholly or partly for landscape, scenic or noncontact recre- ational purposes. C.Commercial Office Building: Any building for office or commercial uses with water requirements which include, but are not limited to, landscape irrigation, toilets, urinals and decorative foun- tains. D.Recycled Water Distribution System: A piping system intended for the delivery of recycled water separate from and in addition to the potable water distribution system. E.Greenbelt Areas: A greenbelt area includes, but is not limited to golf courses, cemeteries, parks and landscaping. F.Industrial Process Water: Water used by any industrial facility with process water require- ments which include, but are not limited to, rins- ing, washing, cooling and circulation, or con- struction, including any facility regulated for 26-3 industrial waste or other objectionable discharge under District Code of Ordinances Sections 52.04, 52.05 and 52.06. G.Off-Site Facilities: Water facilities from the source of supply to the point of connection with the on-site facilities, normally up to and includ- ing the water meter. H.On-Site Facilities: Water facilities under the control of the owner normally downstream from the water meter. I.Potable Water: Water which conforms to the fed- eral, state and local standards for human consump- tion. J.Recycled Water: Recycled water means water which, as a result of treatment, is suitable for a direct beneficial use or controlled use that would not otherwise occur. (See Water Code Section 13050(n).) K.Recycled Water Use Permit: A recycled water permit means a permit issued by the District approving and conditioning recycled water service for a particular site. L.Recycled Water Site Supervisor: A person responsible for the safe and efficient installation, operation and maintenance of a recycled water use site, including but not limited to compliance with all applicable permits, enforcement of the recycled water producer’s rules and regulations and the prevention of potential hazards, such as cross-connections. The Recycled Water Site Supervisor must be certified by an approved Recycled Water Site Supervisor Certification Training Class offered within the County of San Diego and must have evidence of valid certification at all times while acting as Recycled Water Site Supervisor. M.Temporary Recycled Water Use Permit: Temporary recycled water use permit means a permit issued by the District, at its discretion, to allow temporary use of recycled water pending issuance of a recycled water use permit or pending renewal of such permit following suspension or termination due to a violation of the provisions of this Section. N.Waste Discharge: Waste Discharge means water deposited, released or discharged into a sewer 26-4 system from any commercial, industrial or residen- tial source which contains levels of any substance or substances which may cause substantial harm to any water treatment or reclamation facility or which may prevent any use of reclaimed water authorized by law. 26.04 WATER RECLAMATION MASTER PLAN A.General: The General Manager shall prepare and adopt a Water Recycling Master Plan to define, encourage, and develop the use of recycled water within the District's boundaries. The Master Plan shall be updated not less often than every five years. B.Contents of the Water Recycling Master Plan: The Master Plan shall include, but not be limited to, the following: 1.Plants and Facilities. Evaluation of the location and size of present and future recycling treatment plants, distribution pipelines, pump stations, reservoirs, and other related facilities, including cost estimates and potential financing methods. 2.Recycled Water Service Areas. A designation, based on the criteria set forth in Section 26.02 and the information derived from Section 26.04B.1. and this Section 26.04B.2. of the areas within the District that can or may in the future use recycled water in lieu of potable water. Recycled water uses may include, but are not limited to, the irriga- tion of greenbelt and agricultural areas, filling of artificial lakes, and appropriate industrial and commercial uses. 3.Designate Tributary Areas. For each water reclamation facility identified in the Master Plan, designate proposed tributary areas. Within such areas, discharges to the sewage system shall be subject to permitting, moni- toring and control measures to protect public health, safety and public and private prop- erty. Designation of tributary areas shall be adopted by ordinances, and may be included in the Master Plan. Prior to designation of tributary areas, appropriate notice shall be given to property owners and residents of the area. 4.Quality of Water to be Recycled. For each water reclamation treatment facility, evalu- 26-5 ate water quality with respect to the effect on anticipated uses of recycled water to be served by each treatment facility. Evaluate sources of waste discharge and sewer inflow that may, directly or cumulatively, substan- tially contribute to adverse water quality conditions in recycled water. 5.Tributary Protection Measures. Develop rec- ommended control measures and management practices for each designated tributary area to maintain or improve the quality of recycled water. Such control measures may include capital improvements to the sewer collection system and waste discharge restrictions for industrial, commercial and residential discharges. 6.Mandatory Recycled Water Use. For each recycled water service area, evaluate whether greenbelt irrigation, agricultural irrigation, commercial office buildings, filling of artificial lakes, or industrial processes shall be limited to the use of recycled water. As appropriate, mandate construction of recycled water distribution systems or other facilities in new and exist- ing developments for current or future recycled water use as a condition of any development approval or continued water ser- vice if future reclamation facilities are proposed in the Master Plan that could ade- quately serve the development, in accordance with the procedures described in Section 26.05. Identify resources and adopt measures to assist water users in the financing of necessary conversions. 7.Rules and Regulations for Recycled Water Use. Establish general rules and regulations governing the use and distribution of recycled water. 8.Public Awareness Program. Establish a com- prehensive water reclamation public awareness program. 9.Coordination Among Agencies. An examination of the potential for initiating a coordinated effort between the District and other regional agencies to share in the production and utilization of recycled water. 26.05 PROCEDURES 26-6 A.Existing Potable Water Service. 1.Preliminary Determination. Based upon the Master Plan, upon the designation of each recycled water service area or the commence- ment of the design of new recycled water facilities, the General Manager shall make preliminary determinations as to which exist- ing potable water customers shall be con- verted to the use of recycled water. Each water customer shall be notified of the basis for a determination that conversion to recycled water service will be required, as well as the proposed conditions and schedule for conversion. 2.Notice. The notice of the preliminary deter- mination, including the proposed conditions and time schedule for compliance, and a recycled water permit application shall be sent to the water customer by certified mail. 3.Objections; Appeals. The water customer may file a notice of objection with the District within thirty (30) days after any notice of determination to comply is delivered or mailed to the customer, and may request reconsideration of the determination or modi- fication of the proposed conditions or sched- ule for conversion. The objection must be in writing and specify the reasons for the objection. The preliminary determination shall be final if the customer does not file a timely objection. Staff (Engineering Department) shall review the objection and shall confirm, modify or abandon the prelimi- nary determination. Upon issuance of a final determination in writing by Staff, customer may appeal the determination upon written application to the Board of Directors after the final determination made by the Staff Engineering Department). The customer’s written application to the Board of Directors to appeal the final determination must be received within thirty (30) days of the customer receiving the final determination. B.Development and Water Service Approvals. 1.Conditions. Upon application by a developer, owner or water customer (herein referred to as "applicant") for a tentative map, subdivi- sion map, land use permit or other develop- 26-7 ment project as defined by Government Code Section 65928 or for new or altered water service, the District Staff shall review the Master Plan and make a preliminary determina- tion whether the current or proposed use of the subject property is required to be served with recycled water or to include facilities designed to accommodate the use of recycled water in the future. Based upon such deter- mination, use of recycled water and provision of recycled water distribution systems or other facilities for the use of recycled water, and application for a permit for such use may be required a condition of approval of any such application, in addition to any other conditions of approval for service. 2.Alterations and Remodeling. On a case-by- case basis, upon application for a permit for the alteration or remodeling of multifamily, commercial or industrial structures including, for example, hotels), the Dis- trict Staff shall review the Master Plan and make a preliminary determination whether the subject property shall be required to be served with recycled water or to include facilities designed to accommodate the use of recycled water in the future. Based upon such determination, use of recycled water and provision of recycled water distribution systems or other facilities for the use of recycled water, and application for a permit for such use, may be required as a condition of approval of the application. 3.Notice of Determination. A notice of the basis for the preliminary determination, proposed conditions of approval and schedule for compliance shall be provided to the applicant prior to approval of the develop- ment application or application for water service. 4.Requested Service. On a case-by-case basis, upon application for a permit to use recycled water on a property not covered by Sections 26.05.A.1, 26.05.B.1, or 26.05.B.2 above, the General Manager shall review the Master Plan and make a determination whether the subject property shall be served with recycled water. Based upon such determination, the application for the permit shall be accepted and processed subject to Section 26.05.C. 26-8 C.Recycled Water Permit Process. Upon a final determination by the General Manager that a prop- erty shall be served with recycled water, or adoption of a condition of development approval or water service requiring use or accommodation of the use of recycled water, the water customer owner or applicant shall obtain a recycled water permit. 1.Permit Conditions. The permit shall specify the design and operational requirements for the applicant's water distribution facilities and schedule for compliance, based on the rules and regulations adopted pursuant to Section 26.04.B and shall require compliance with both the California Department of Health Services Wastewater Recycling Criteria (see California Code of Administrative Regula- tions, Title 22), and requirements of the Regional Water Quality Control Board. 2.Plan Approval. Plans for the recycled and non-recycled water distribution systems for the parcel shall be reviewed by the District Engineer and a field inspection conducted before the plans are approved. 3.Meter Permit Issuance. Upon completion of construction and approval by the District and the County Department of Environmental Health the meter permit shall be issued. Recycled water shall not be supplied to a property until inspection by the District determines that the applicant is in compliance with the permit conditions. 4.Recycled Water Use Permit Issuance. If the site has a certified Recycled Water Site Supervisor, a Recycled Water Use Permit will be issued by the District. If the site does not have a certified Recycled Water Site Supervisor identified, a Temporary Recycled Water Use Permit may be issued, for a maximum of 120 days, to allow the site to receive recycled water while a proposed Recycled Water Site Supervisor is being certified. Failure to secure a certified Recycled Water Site Supervisor for the site under a Temporary Recycled Water Use Permit may result in discontinuation of recycled water service to the site. D.Temporary Use of Potable Water. At the discretion of the General Manager, potable water may be made 26-9 available on a temporary basis, until recycled water is available. Before the applicant receives temporary potable water, a water reclamation per- mit, as described in Section 26.05.C, must be obtained for new on-site distribution facilities. Prior to commencement of recycled water service, an inspection of the on-site facilities will be conducted to verify that the facilities have been maintained and are in compliance with the recycled water permit and current requirements for service. Upon verification of compliance, the applicant shall be notified of the corrective actions necessary and shall have at least thirty (30) days to take such actions prior to initiation of enforcement proceedings. E.Recycled Water Rate. The rate charged for recycled water shall be established by Ordinance of the Board of Directors. F.Certified Recycled Water Site Supervisor Requirements. 1.Each Approved Recycled Water Use Site is required to have a Certified Recycled Water Site Supervisor. It is the responsibility of the recycled water use site owner or property designee to assure a Certified Recycled Water Site Supervisor is assigned to the recycled water use site. 2.Each approved recycled water use site shall maintain and report annually proof of Recycled Water Site Supervisor certification, a current address, and a 24-hour emergency contact phone number for the assigned Recycled Water Site Supervisor on a form approved by the Otay Water District. Failure to report the prescribed Recycled Water Site Supervisor information annually may result in discontinuation of recycled water service to the site. 3.Recycled Water Site Supervisors shall hold a valid and current certification from a Recycled Water Site Supervisor Certification Training Course recognized by the San Diego County Health Department and approved by Otay Water District. Evidence of said certification shall be available on site and upon request by the District. Certification 26-10 alone does not constitute District approval. Recertification of the Recycled Water Site Supervisor is required every five years. 4.The Recycled Water Site Supervisor shall be solely responsible for communications with the property owner or property designee for all on site recycled water issues. 5.Periodic inspection of the Approved Recycled Water Use Site may be made by the District to verify conformance with the approved Recycled Water Use Permit. If at any time the Otay Water District conducts an inspection of a recycled water use site and the Recycled Water Site Supervisor’s certification is expired or it has been determined that the recycled water use site has failed to meet the requirements of the permit, recycled water service to the site shall be discontinued until the recycled water site is brought back into compliance with the approved Recycled Water Use Permit. 6.The District reserves the right to recommend removal of a Recycled Water Site Supervisor if it has been determined upon inspection that the Recycled Water Site Supervisor’s actions have placed the public at risk through improper conduct, testing, repairs, unapproved modifications, and/or reporting with respect to an Approved Recycled Water Use Site. 26.06 REGULATION OF WASTE DISCHARGE TO SEWERAGE SYSTEMS A.Intent. The District recognizes that to maintain adequate wastewater quality for water reclamation treatment processes, and to protect public and private property, restrictions may be required on certain industrial, commercial and residential waste discharges to a sewerage system that is located within a designated tributary area of an existing or planned reclamation facility. B.Adopted Tributary Protection Measures. Waste dis- charges to the sewerage system from any indus- trial, commercial or residential source may be 26-11 restricted or prohibited upon a finding, following a noticed public hearing, that the type or class of discharge involved is capable of causing or may cause substantial damage or harm to any sewage treatment or reclamation facility or to any sig- nificant user or users or potential user or users of recycled water within an area which has been planned for recycled water service. Prohibitions for certain discharges and guidelines for accept- ability of wastes are set forth in District Code of Ordinances Sections 52.04, PROHIBITIONS AGAINST DISCHARGE OF OBJECTIONABLE WASTES, which prohibits discharge of certain items into the District sewer system, including, but not limited to, brine dis- charge from on-site self-regenerating water sof- tener units; 52.05, GUIDELINES TO DETERMINE ACCEPTABILITY OF WASTES; and 52.06, DISCHARGE OF INDUSTRIAL WASTE. 26.07 SANCTIONS. In addition to the remedies established under Division IV of this Code, the following sanctions and remedies apply to violations of the provisions of this Section. A.Public Nuisance. Discharge of wastes or the use of recycled water in any manner in violation of this ordinance or of any permit issued hereunder is hereby declared a public nuisance and shall be corrected or abated as directed by the General Manager. Any person creating such a public nui- sance is guilty of a misdemeanor. B.Injunction. Whenever a discharge of wastes or use of recycled water is in violation of this ordi- nance or otherwise causes or threatens to cause a public nuisance, the District may seek injunctive relief as may be appropriate to enjoin such discharge or use. C.Permit Suspension or Revocation. In addition to any other provision of this Code or state statute or rule authorizing termination of water service, the General Manager may suspend or revoke a permit issued hereunder if a violation of any provision of this ordinance or the Rules and Regulations for Recycled Water Use is found to exist or if a discharge of wastes or use of recycled water causes or threatens to cause a nuisance. If a permit is revoked, the General Manager may, at its discretion, issue the recycled water user a temporary recycled water permit for up to 120 days to allow service to continue while corrective measures are completed. 26-12 D.Penalty. Any owner and/or operator who violates this ordinance shall, for each day of violation, or portion thereof, be subject to an administrative fine as described in Section 72.05. 26.08 VALIDITY If any provision of this Section 26 or the application thereof to any person or circumstance is held invalid, the remainder of Section 26 and the application of such provi- sions to other persons or circumstances shall not be affected thereby. 39-1 SECTION 39. DROUGHT RESPONSE CONSERVATION PROGRAM 39.01 DECLARATION OF NECESSITY AND INTENT (a) This Section establishes water management requirements that are in addition to any permanent water waste prohibitions and are necessary to conserve water, enable effective water supply planning, assure reasonable and beneficial use of water, prevent waste of water, prevent unreasonable use of water, prevent unreasonable method of use of water within the District in order to assure adequate supplies of water to meet the needs of the public, and further the public health, safety, and welfare, recognizing that water is a scarce natural resource that requires careful management not only in times of a water shortage, but at all times. (b) This Section establishes regulations to be implemented during times of declared water shortages or declared water shortage emergencies. It establishes six levels of drought response actions to be implemented in times of shortage, with increasing restrictions on water use in response to worsening drought conditions and decreasing available supplies. (c) The Level 1 condition drought response measures are voluntary and will be reinforced through local and regional public education and awareness measures that may be funded in part by the District. Beginning at the level 2 Water Shortage Response Condition, the District may implement water shortage pricing. During drought response condition Levels 2 through 6, all conservation measures and water-use restrictions become mandatory and become increasingly restrictive in order to attain escalating conservation goals. (d) During a Drought Response Level 2 condition or higher, the water conservation measures, and water use restrictions established by this ordinance are mandatory and violations are subject to criminal, civil, and administrative penalties and remedies specified in Section 72 of this ordinance. 39-2 39.02 DEFINITIONS APPLICABLE TO THE PROGRAM (a) The following words and phrases whenever used in this Section shall have the meaning defined in this sub- section: 1. “Grower” refers to those engaged in the growing or raising, in conformity with recognized practices of husbandry, for the purpose of commerce, trade, or industry, or for use by public educational or correctional institutions, of agricultural, horticultural or floricultural products, and produced: (1) for human consumption or for the market, or (2) for the feeding of fowl or livestock produced for human consumption or for the market, or (3) for the feeding of fowl or livestock for the purpose of obtaining their products for human consumption or for the market. “Grower” does not refer to customers who purchase water subject to the Water Authority’s Permanent Special Agricultural Water Rate programs. 2. “Water Authority” means the San Diego County Water Authority. 3. “Metropolitan” means the Metropolitan Water District of Southern California. 4. “Permanent water use efficiency measures” means any permanent water use efficiency measure adopted by the District Board of Directors. 5. “Person” means any natural person, corporation, public or private entity, public or private association, public or private agency, government agency or institution, school district, college, university, or any other user of water provided by the District. 6. “WSCP” means the Water Authority’s Water Shortage Contingency Plan or the District’s Water Shortage Contingency Plan, as specified, in existence on the effective date of this ordinance and as readopted or amended from time to time, or an equivalent plan of the Water Authority to manage or allocate supplies during shortages. 39-3 39.03 APPLICATION (a) The provisions of this Section apply to any person in the use of any water provided by the District. (b) This Section is intended solely to further the conservation of water. It is not intended to implement any provision of federal, State, or local statutes, ordinances, or regulations relating to protection of water quality or control of drainage or runoff. Refer to the local jurisdiction or Regional Water Quality Control Board for information on any storm water ordinances and storm water management plans. (c) Nothing in this Section is intended to affect or limit the ability of the District to declare and respond to an emergency including an emergency that affects the ability of the District to supply water. (d) The provisions of this Section do not apply to use of water from private wells or to recycled water. (e) Nothing in this Section shall apply to use of water that is subject to a special supply program, such as the Water Authority Permanent Special Agricultural Water Rate programs. Violations of the conditions of special supply programs are subject to the penalties established under the applicable program. A person using water subject to a special supply program and other water provided by the District is subject to this Section in the use of the other water. At all times, the following practices shall be in effect: 1. Prevent water waste resulting from inefficient irrigation, such as runoff or overspray. Similarly, stop water flows onto non-targeted areas, such as adjacent property, non-irrigated areas, hardscapes, roadways, or structures; 2. Serve and refill water in restaurants and other food service establishments only upon request; 39-4 3. Offer guests in hotels, motels, and other commercial lodging establishments the option of not laundering towels and linens daily; 4. Use only re-circulated water in fountains or other decorative water features; 5. Wash automobiles with a hose equipped only with a positive shut-off nozzle; 6. Irrigating ornamental turf on public street medians only with recycled water; 7. Repair all water leaks within forty-eight (48) hours of notification by the District unless other arrangements are made with the General Manager or designee; 8. Irrigation is not allowed during a rainstorm or for forty-eight (48) hours after one-quarter inch or more of rainfall is measured at Lindbergh Field; 9. No washing down of paved surfaces, including but not limited to sidewalks, driveways, parking lots, tennis courts, or patios, except when it is necessary to alleviate safety or sanitation hazards. 39.04 DROUGHT RESPONSE LEVEL 1 (a) A Drought Response Level 1 condition applies when the Water Authority notifies its member agencies that due to drought or other supply reductions, there is a reasonable probability there will be supply shortages and that a consumer demand reduction of up to ten (10) percent is required in order to ensure that sufficient supplies will be available to meet anticipated demands. The General Manager shall declare the existence of a Drought Response Level 1 and take action to implement the Level 1 conservation practices identified in this Section. (b) During a Drought Response Level 1 condition, the District will increase its public education and outreach efforts to emphasize increased public awareness of the need to implement the water conservation practices noted above and the following water conservation practices. The same water conservation practices become mandatory if the District declares a Level 2 Drought Alert condition: 39-5 1. Irrigate residential and commercial landscape before 10 a.m. and after 6 p.m. only. Customers are to water no more than three days a week using the suggested watering schedule as found on the District’s web page. New plantings and newly seeded areas are exempt for thirty (30) days. 2. Use a hand-held hose equipped with a positive shut-off nozzle or bucket to water landscaped areas including trees and shrubs located on residential and commercial properties that are not irrigated by a landscape irrigation system. 3. Irrigate nursery and commercial grower’s products before 10 a.m. and after 6 p.m. only. Watering is permitted at any time with a hand-held hose equipped with a positive shut-off nozzle, a bucket, or when a drip/micro-irrigation system/equipment is used. Irrigation of nursery propagation beds is permitted at any time. Watering of livestock is permitted at any time. 4. Wash vehicles, including but not limited to motorcycles, farm equipment, trailers, boats and boat engines and motorhomes using a bucket and a hand-held hose with positive shut-off nozzle, mobile high pressure/low volume wash system, or at a commercial site that re-circulates (reclaims) water on-site. Vehicle washing is limited to once per week. 5. Use recycled or non-potable water for construction purposes when available. 39.05 DROUGHT RESPONSE LEVEL 2 (a) A Drought Response Level 2 condition applies when the Water Authority notifies its member agencies that due to cutbacks caused by drought or other reduction in supplies, a consumer demand reduction of up to twenty (20) percent is required in order to have sufficient supplies available to meet anticipated demands. The District Board of Directors shall declare the existence of a Drought Response Level 2 condition and implement the mandatory Level 2 conservation measures identified in this Section of the ordinance. 39-6 (b) All persons using District water shall comply with Level 1 water conservation practices during a Drought Response Level 2 condition, and shall also comply with the following additional conservation measures: 1. Limit residential and commercial landscape irrigation to no more than three (3) assigned days per week on a schedule established by the General Manager or designee and posted by the District. This section shall not apply to commercial growers or nurseries. 2. Limit lawn watering and landscape irrigation using sprinklers to no more than ten (10) minutes per watering station per day. This provision does not apply to landscape irrigation systems using water efficient devices, including but not limited to weather-based controllers, drip/micro-irrigation systems, and stream rotor sprinklers. 3. Water landscaped areas, including trees and shrubs located on residential and commercial properties, and not irrigated by a landscape irrigation system on the same schedule set forth above, by using a bucket, hand-held hose with positive shut-off nozzle, or low-volume non-spray irrigation. 4. Stop operating fountains or similar decorative water features unless recycled water is used. 39.06 DROUGHT RESPONSE LEVEL 3 – DROUGHT CRITICAL CONDITION (a) A Drought Response Level 3 condition applies when the Water Authority notifies its member agencies that due to increasing cutbacks caused by drought or other reduction of supplies, a consumer demand reduction of up to thirty (30) percent is required in order to have sufficient supplies available to meet anticipated demands. The District Board of Directors shall declare the existence of a Drought Response Level 3 condition and implement the Level 3 conservation measures identified in this Section. (b) All persons using District water shall comply with Level 1 and Level 2 water conservation practices 39-7 during a Drought Response Level 3 condition and shall also comply with the following additional mandatory conservation measures: 1. Limit residential and commercial landscape irrigation to no more than two (2) assigned days per week on a schedule established by the General Manager or designee and posted by the District. This section shall not apply to commercial growers or nurseries. 2. Water landscaped areas, including trees and shrubs located on residential and commercial properties, and not irrigated by a landscape irrigation system on the same schedule set forth above, by using a bucket, hand-held hose with a positive shut-off nozzle, or low-volume non-spray irrigation. 3. Stop washing vehicles except at commercial carwashes that re-circulate water, or by high pressure/low volume wash systems. If a commercial car wash cannot accommodate the vehicle because of the vehicle size or type, such as RVs, horse trailers, boats, and commercial vehicles, customers will be allowed to wash vehicles using a bucket and a hand- held hose with positive shut-off nozzle, mobile high pressure/low volume wash system. (c) Upon the declaration of a Drought Response Level 3 condition, the District will suspend consideration of annexations to its service area. (d) The District may establish a water allocation for property served by the District using a method that does not penalize persons for the implementation of conservation methods or the installation of water saving devices. If the District establishes a water allocation, it shall provide notice of the allocation by including it in the regular billing statement for the fee or charge or by any other mailing to the address to which the District customarily mails the billing statement for fees or charges for on-going water service. Following the effective date of the water allocation as established by the District, any person that uses water in excess of the allocation shall be subject to a penalty for each billing unit of water in excess of the allocation. The penalty for excess water 39-8 usage shall be cumulative to any other remedy or penalty that may be imposed for violation of this Section. 39.07 DROUGHT RESPONSE LEVEL 4 (a) A Drought Response Level 4 condition applies when the Water Authority notifies its member agencies that due to increasing cutbacks caused by drought or other reduction of supplies, a consumer demand reduction of up to forty (40) percent is required in order to have sufficient supplies available to meet anticipated demands. The District Board of Directors shall declare the existence of a Drought Response Level 4 condition and implement the Level 4 conservation measures identified in this Section. (b) All persons using District water shall comply with Level 1, Level 2, and Level 3 water conservation practices during a Drought Response Level 4 condition and shall also comply with the following additional mandatory conservation measures: Stop filling or re-filling ornamental lakes or ponds, except to the extent needed to sustain aquatic life, provided that such animals are of significant value and have been actively managed within the water feature prior to declaration of a water shortage response level under this Section. (c) The District may establish a water allocation for property served by the District using a method that does not penalize persons for the implementation of conservation methods or the installation of water saving devices. If the District establishes a water allocation, it shall provide notice of the allocation by including it in the regular billing statement for the fee or charge or by any other mailing to the address to which the District customarily mails the billing statement for fees or charges for on-going water service. Following the effective date of the water allocation as established by the District, any person that uses water in excess of the allocation shall be subject to a penalty for each billing unit of water in excess of the allocation. The penalty for excess water usage shall be cumulative to any other remedy or penalty that may be imposed for violation of this Section. 39-9 39.08 DROUGHT RESPONSE LEVEL 5 (a) A Drought Response Level 5 condition applies when the Water Authority notifies its member agencies that due to increasing cutbacks caused by drought or other reduction of supplies, a consumer demand reduction of up to fifty (50) percent is required in order to have sufficient supplies available to meet anticipated demands. The District Board of Directors shall declare the existence of a Drought Response Level 5 condition and implement the Level 5 conservation measures identified in this ordinance. (b) All persons using District water shall comply with conservation measures required during Level 1, Level 2, Level 3, and Level 4 conditions and shall also comply with the following additional mandatory conservation measures: 1. Stop all landscape irrigation, except crops and landscape products of commercial growers and nurseries. This restriction shall not apply to the following categories of use unless the District has determined that recycled water is available and may be lawfully applied to the use. A. Maintenance of trees and shrubs that are watered on the same schedule as noted above, by using a bucket, hand-held hose with a positive shut-off nozzle, or low-volume non-spray irrigation; B. Maintenance of existing landscaping necessary for fire protection as specified by the Fire Marshal of the local fire protection agency having jurisdiction over the property to be irrigated; C. Maintenance of existing landscaping for erosion control; D. Maintenance of plant materials identified to be rare or essential to the well- being of rare animals; E. Maintenance of landscaping within active public parks and playing fields, day care 39-10 centers, school grounds, cemeteries, and golf course greens, provided that such irrigation does not exceed two (2) days per week according to the schedule established under the District’s Level 3 Condition; F. Watering of livestock; and G. Public works projects and actively irrigated environmental mitigation projects. 2. Repair all water leaks within twenty-four (24) hours of notification by the District unless other arrangements are made with the District. (c) The District may establish a water allocation for property served by the District that does not penalize persons for the implementation of conservation methods or the installation of water saving devices. If the District establishes a water allocation, it shall provide notice of the allocation by including it in the regular billing statement for the fee or charge or by any other mailing to the address to which the District customarily mails the billing statement for fees or charges for on-going water service. Following the effective date of the water allocation as established by the District, any person that uses water in excess of the allocation shall be subject to a penalty for each billing unit of water in excess of the allocation. The penalty for excess water usage shall be cumulative to any other remedy or penalty that may be imposed for violation of any provision of this Section. (d) Upon the declaration of a Level 5 condition, no new potable water service shall be provided, no new temporary meters or permanent meters shall be provided and no statements of immediate ability to serve or provide potable water service (such as, will serve letters, certificates, or letters of availability) shall be issued, except under the following circumstances: 1. A valid, unexpired building permit has been issued for the project; or 2. The project is necessary to protect the public’s health, safety, and welfare; or 39-11 3. The applicant provides substantial evidence of an enforceable commitment that water demands for the project will be offset prior to the provision of a new water meter(s) to the satisfaction of the District. This provision shall not be construed to preclude the resetting or turn-on of meters to provide continuation of water service or to restore service that has been interrupted for a period of one (1) year or less. 39.09 DROUGHT RESPONSE LEVEL 6 (a) A Drought Response Level 6 condition applies when the Water Authority Board of Directors declare a water shortage emergency pursuant to California Water Code Section 350 and notifies its member agencies that Level 6 requires a demand reduction of more than fifty (50) percent in order for the District to have maximum supplies available to meet anticipated demands. The District shall declare a Drought Emergency in the manner and on the grounds provided in California Water Code Section 350. (b) All persons using District water shall comply with conservation measures required during Level 1, Level 2, Level 3, Level 4, and Level 5 conditions and shall also comply with the following additional mandatory conservation measures: 1. Stop all landscape irrigation, except crops and landscape products of commercial growers and nurseries. This restriction shall not apply to the following categories of use unless the District has determined that recycled water is available and may be lawfully applied to the use. A. Maintenance of existing landscaping necessary for fire protection as specified by the Fire Marshal of the local fire protection agency having jurisdiction over the property to be irrigated; B. Maintenance of existing landscaping for erosion control; 39-12 C. Maintenance of plant materials identified to be rare or essential to the well- being of rare animals; D. Watering of livestock; and E. Public works projects and actively irrigated environmental mitigation projects. 39.10 PROCEDURES FOR DETERMINATION AND NOTIFICATION OF DROUGHT RESPONSE LEVEL (a) The existence of a Drought Response Level 1 condition may be declared by the General Manager upon a written determination of the existence of the facts and circumstances supporting the determination. A copy of the written determination shall be filed with the Clerk or Secretary of the District and provided to the District Board of Directors. The General Manager may publish a notice of the determination of existence of Drought Response Level 1 condition in one or more newspapers including a newspaper of general circulation within the District. The District will also post notice of the condition on their website. (b) The existence of Drought Response Level 2, Level 3, Level 4, or Level 5 conditions may be declared by resolution of the District Board of Directors adopted at a regular or special public meeting held in accordance with State law. The mandatory conservation measures applicable to Drought Response Level 2, Level 3, Level 4, or Level 5 conditions shall take effect on the tenth (10) day after the date the response level is declared. Within five (5) days following the declaration of the response level, the District shall publish a copy of the resolution in a newspaper used for publication of official notices. If the District establishes a water allocation, it shall provide notice of the allocation by including it in the regular billing statement for the fee or charge or by any other mailing to the address to which the District customarily mails the billing statement for fees or charges for on- going water service. Water allocation shall be effective on the fifth (5) day following the date of mailing or at such later date as specified in the notice. 39-13 (c) The existence of a Drought Response Level 6 condition may be declared in accordance with the procedures specified in California Water Code Sections 351 to 352. The mandatory conservation measures applicable to Drought Response Level 6 conditions shall take effect on the tenth (10) day after the date the response level is declared. Within five (5) days following the declaration of the response level, the District shall publish a copy of the resolution in a newspaper used for publication of official notices. (d) The District Board of Directors may declare an end to a Drought Response Level by the adoption of a resolution at any regular or special meeting held in accordance with State law. 39.11 HARDSHIP VARIANCE (a) If, due to unique circumstances, a specific requirement of this ordinance would result in undue hardship to a person using agency water or to property upon which agency water is used, that is disproportionate to the impacts to District water users generally or to similar property or classes of water uses, then the person may apply for a variance to the requirements as provided in this Section. (b) The variance may be granted or conditionally granted, only upon a written finding of the existence of facts demonstrating an undue hardship to a person using agency water or to property upon with agency water is used, that is disproportionate to the impacts to District water users generally or to similar property or classes of water use due to specific and unique circumstances of the user or the user’s property. 1. Application. Application for a variance shall be a form prescribed by the District and shall be accompanied by a non-refundable processing fee in an amount set by resolution of the District Board of Directors. 2. Supporting Documentation. The application shall be accompanied by photographs, maps, drawings, and other information including a written statement of the applicant. 39-14 3. Required Findings for Variance. An application for a variance shall be denied unless the approving authority finds, based on the information provided in the application, supporting documents, or such additional information as may be requested, and on water use information for the property as shown by the records of the District, all of the following: A. That the variance does not constitute a grant of special privilege inconsistent with the limitations upon other District customers; B. That because of special circumstances applicable to the property or its use, the strict application of this ordinance would have a disproportionate impact on the property or use that exceeds the impacts to customers generally; C. That the authorizing of such variance will not be of substantial detriment to adjacent properties and will not materially affect the ability of the District to effectuate the purpose of this chapter and will not be detrimental to the public interest; D. That the condition or situation of the subject property or the intended use of the property for which the variance is sought is not common, recurrent, or general in nature. 4. Approval Authority. The General Manager shall exercise approval authority and act upon any completed application no later than ten (10) days after submittal and may approve, conditionally approve, or deny the variance. The applicant requesting the variance shall be promptly notified in writing of any action taken. Unless specified otherwise at the time a variance is approved, the variance applies to the subject property during the term of the mandatory drought response. 5. Appeals to District Board of Directors. An applicant may appeal a decision or condition of the General Manager on a variance application to the District Board of Directors within ten (10) days of the decision upon written request for a hearing. The 39-15 request shall state the grounds for the appeal. At a public meeting, the District Board of Directors shall act as the approval authority and review the appeal de novo by following the regular variance procedure. The decision of the District Board of Directors is final. 39.12 VIOLATIONS AND PENALTIES (a) Any person, who uses, causes to be used, or permits the use of water in violation of this ordinance is guilty of an offense punishable as provided herein; (b) Each day that a violation of this ordinance occurs is a separate offense; (c) Administrative fines may be levied for each violation of a provision of this ordinance as identified in Section 72 of this code; (d) Violation of a provision of this ordinance is subject to enforcement through installation of a flow- restricting device in the meter; (e) Each violation of this ordinance may be prosecuted as a misdemeanor punishable by imprisonment in the county jail for not more than thirty (30) days or by a fine not exceeding $1,000, or by both as provided in Water Code Section 377 and Section 72 of this code; (f) Willful violations of the mandatory conservation measures and water use restrictions as set forth in Section 11.0 and applicable during a Drought Response Level 6 condition may be enforced by discontinuing service to the property at which the violation occurs as provided by Water Code Section 356 and Section 72 of this code; (g) All remedies provided for herein shall be cumulative and not exclusive. Otay Water District 2025 Urban Water Management Plan June 2026 APPENDIX I: QUANTIFYING REGIONAL SELF-RELIANCE AND REDUCED RELIANCE ON THE DELTA WATERSHED Appendix I – Reporting on Reduced Delta Reliance Regulatory Background Urban water suppliers that anticipate participating in or receiving water from a proposed project, such as a multiyear water transfer, conveyance facility, or new diversion that involves transferring water through, exporting water from, or using water in the Sacramento-San Joaquin Delta (Delta) should demonstrate reduced reliance on the Delta in their 2025 Urban Water Management Plans (UWMPs) that can then be used in the certification of consistency process to demonstrate consistency with Delta Plan Policy WR P1, Reduce Reliance on the Delta Through Improved Regional Water Self-Reliance (California Code Regulations, Title 23, §5003).1 The Delta Plan Policy WR P1 identifies the UWMP as the tool to demonstrate consistency with the state policy that suppliers that carry out or take part in covered actions must reduce their reliance on the Delta.2 Otay Water District’s (District) information on its reduced reliance on the Delta is documented below and can be used in future certifications of consistency with WR P1 for potential future water supply covered actions in the Delta. Otay Water District Reliance on Delta Watershed The District currently has one local water supply, recycled water. The District’s potable water supply is purchased from the San Diego County Water Authority (Water Authority). More than half of the Water Authority’s supply comes from its imported supply portfolio, which consists of Colorado River transfers from Imperial Irrigation District (IID), and from the State Water Project (SWP) and Central Valley Project (CVP) via Metropolitan Water District of Southern California (MWD). The District’s only imported water supplies that originate in the Delta watershed are imported water supplies delivered by the Water Authority via MWD. Recognizing that the Delta supplies are threatened by uncertain long-term reliability issues associated with drought shortages, climate change, seismic events, environmental impacts, and flow restrictions, and that imported water purchases are becoming increasingly expensive, the District has taken actions to reduce demand for imported water from the Water Authority as supplied by MWD, and is committed to explore future opportunities to continue to reduce its reliance on imported water. Given that the District’s only potential source of water from the Delta watershed is water purchased from the Water Authority, the District relies on the Water Authority’s reduced Delta reliance to also demonstrate reduced regional reliance on the Delta. Water Authority Reduced Reliance on Delta Watershed As part of its 2025 UWMP, the Water Authority completed a Delta Reliance analysis to evaluate reduced Delta reliance consistent with Appendix C in the California Department of Water Resources’ (DWR) UWMP Guidebook 2025 (DWR Guidebook). The District’s demonstration of reduced Delta reliance summarizes the Water Authority’s 2025 reduced Delta reliance analysis. The Water Authority included in its 2025 UWMP documentation of consistency with WR P1 by quantifying the water use efficiency supply volume; quantifying total water supplies; quantifying 1 Urban Water Management Plan Guidebook 2025, California Department of Water Resources, January 2026, p. C-1. 2 Ibid., p. C-2. the water supplies that contribute to regional self-reliance; and demonstrating reduced reliance on water supplies from the Delta watershed. Quantification of Water Supplies that Contribute to Regional Self-Reliance Water suppliers must report the expected outcome for measurable improvement in regional self- reliance as a reduction in water used from the Delta watershed. Table 1 lists the sources of water supplies and volumes that contribute to regional self-reliance.3 As shown in the table, the Water Authority’s reliance on the Delta watershed, and consequently the District’s reliance on the Delta watershed, decreases over time as the percent of water supplies that contribute to regional self- reliance increase over time. The District’s individual supplies that contribute to regional self- reliance can be found in Chapter 6 Normal Year Water Supply Characterization in the District’s 2025 UWMP. Table 1 – Calculation of Supplies Contributing to Regional Self-Reliance Demonstration of Reduced Reliance on Water Supplies from the Delta Watershed Water suppliers are required to report on the expected outcomes for measurable reductions in water supplies from the Delta watershed. For the District, the only potential source of water from the Delta watershed is water purchased from the Water Authority via MWD. Because water provided by the Water Authority via MWD can include supplies that comingle Delta watershed and other supplies, the Water Authority (and therefore the District) has incorporated the MWD’s forecast in its entirety as a reasonable methodology to forecast the percent of MWD water supply from the Delta watershed and the CVP/SWP. Table 2 calculates the reduced reliance on the Delta watershed within the entirety of the MWD service area, to serve as a regional approach for this requirement.4 3 2025 UWMP, San Diego County Water Authority, March 2026, Appendix J, Table 3. 4 Draft 2025 UWMP, Metropolitan Water District of Southern California, February 2026, Appendix 10, Table A.10-3. Table 2 – Calculation of Reliance on Water Supplies from Delta Watershed 5 The CVP/SWP contract supplies in Table 2 include MWD's SWP Table A and Article 21 supplies. The values in Table 2 do not include Desert Water Agency/ Coachella Valley Water District SWP contract supplies, nor do they include supplies from San Luis Carryover storage or Central Valley storage programs. The transfers and exchanges of supplies from the Delta watershed shown in Table 2 include supplies from the San Bernardino Valley MWD Program, Yuba River Accord Purchase Program, the San Gabriel Valley MWD Program, Irvine Ranch Water District Storage and Exchange Program, and other generic SWP and Central Valley transfers and exchanges. Additional information can be found in Section 3.2 and Appendix 10 of MWD's Draft 2025 UWMP.6 5 Ibid., p. A. 10-9. 6 Ibid., p. A. 10-8. Otay Water District 2025 Urban Water Management Plan June 2026 APPENDIX J: DWR 2025 UWMP STANDARDIZED TABLES CA3710034 Otay Water District 53,476 35,170 53,476 35,170Total Public Water System Number Public Water System Name Number of Municipal Connections 2025 Submittal Table 2-1 Retail: Public Water Systems Add additional rows as needed NOTES: Volume of water supplied in 2025 includes potable use, losses, and recycled water use. Sources: District consumption data, AWWA Water Audit reports Volume of Water Supplied 2025 (AF) DWR NOTES: Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Submittal Table 2-3. This table identifies the unit of measure selected in Submittal Table 2-3. Select One Name of Regional Alliance or RUWMP (Drop Down List) NOTES: Submittal Table 2-2: Plan Identification Type of Plan Individual UWMP If Water Supplier is also a member of a SB X7-7 Regional Alliance, select name from the drop-down. Regional Urban Water Management Plan (RUWMP) If Supplier selected RUWMP, select name from the drop-down. Supplier is a wholesale supplier Supplier is a retail supplier UWMP Tables are in calendar years UWMP Tables are in fiscal years Unit AF Submittal Table 2-3: Supplier Identification Type of Supplier (select one or both) Fiscal or Calendar Year (select one) If using fiscal years provide month and date that the fiscal year begins (mm/dd) Units of measure used in UWMP (Select from the drop down list). 7/1 DWR NOTES: Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Submittal Table 2-3. NOTES: Submittal Table 2-4 Retail: Water Supplier Information Exchange Water Code Section 10631(h) The retail Supplier has informed the following wholesale supplier(s) of projected water use. Wholesale Water Supplier Name Add additional rows as needed San Diego County Water Authority NOTES: 10631(h) An urban water supplier that relies upon a wholesale agency for a source of water shall provide the wholesale agency with water use projections from that agency for that source of water in five-year increments to 20 years or as far as data is available. 2025 2030 2035 2040 2045 2050(opt) 238,966 257,311 274,714 295,723 297,977 300,231 Submittal Table 3-1 Retail: Population - Current and Projected Water Code Section 10631(a) Population Served NOTES: Population in 2025 reflects area of current customers, whereas 2030-2050 reflects OWD SOI customers. Source: SANDAG Series 15 (version 17) forecast. CWC 10631(a) describe the current and projected population of the service area including current and projected population… Use Type Drop down list May select each use multiple times These are the only use types that will be recognized by the WUEdata online submittal tool Potable or Non-Potable (OPTIONAL) Drop down list Volume (AF) Single Family Potable 14,413 Multi-Family Potable 4,547 Commercial Potable 3,304 Institutional/Governmental Potable 1,665 Landscape Potable 3,834 Agricultural Potable 6 Distribution System Water Loss Real losses + Apparent losses Potable 1,520 Other (optional)Construction, fire service, outside use, OWD meter, sewer Potable 711 Commercial Golf course irrigation Non-Potable 391 Landscape Excluding golf courses Non-Potable 4,701 Other (optional)Construction Non-Potable 78 30,000 5,170 35,170Total Submittal Table 4-1 Retail: Total Uses for Potable and Non-Potable Water — Actual Water Code Section 10631(d)(1) CWC 10631(d)(1) For an urban retail water supplier, quantify, to the extent records are available, past and current water use…identifying the uses among water use sectors including but not limited to: NOTES: DWR NOTES: Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Submittal Table 2-3. This table identifies the unit of measure selected in Submittal Table 2-3. 2025 Actual Water Use Add additional rows as needed Subtotal Potable Subtotal Non-Potable Additional Description (as needed) (A) Single-family residential. (B) Multifamily. (C) Commercial. (D) Industrial. (E) Institutional and governmental. (F) Landscape. (G) Sales to other agencies. 4 | Water Use Characterization Draft | November 2025 4-10 (H) Saline water intrusion barriers, groundwater recharge, or conjunctive use, or any combination thereof. (I) Agricultural. (J) Distribution system water loss Use Type Drop down list May select each use multiple times These are the only Use Types that will be recognized by the WUEdata online submittal tool Potable or Non-Potable (OPTIONAL) Drop down list 2030 (AF)2035 (AF)2040 (AF)2045 (AF)2050 opt (AF) Single Family Potable 14,522 14,867 15,195 15,073 14,918 Multi-Family Potable 8,221 10,314 12,854 13,977 15,221 Commercial Potable 3,582 4,009 4,804 5,425 6,045 Institutional/Governmental Potable 1,790 1,994 2,376 2,655 2,933 Landscape Potable 3,305 3,635 4,063 4,191 4,325 Agricultural Potable 5 5 5 5 5 Distribution System Water Loss Real losses + Apparent losses Potable 1,291 1,430 1,615 1,697 1,784 Other (optional)Construction, fire service, outside use, OWD meter, sewer Potable 228 257 295 307 317 Other (optional)Annexations Potable 2,016 2,086 2,086 2,086 2,086 Commercial Golf course irrigation Non-Potable 364 364 364 364 364 Landscape Excluding golf courses Non-Potable 5,082 5,696 6,274 6,505 6,758 Other (optional)Construction Non-Potable 78 78 78 78 78 34,960 38,597 43,293 45,416 47,634 5,524 6,138 6,716 6,947 7,200 40,484 44,735 50,009 52,363 54,834Total DWR NOTES: Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Submittal Table 2-3. This table identifies the unit of measure selected in Submittal Table 2-3. Subtotal Non-Potable Subtotal Potable Add additional rows as needed. Submittal Table 4-2 Retail: Total Uses for Potable, and Non-Potable Water — Projected Water Code Section 10631(d)(1) Projected Water Use (Report To the Extent that Records are Available) Additional Description (as needed) CWC 10631(d)(1) For an urban retail water supplier, quantify, to the extent records are available... projected water use…identifying the uses among water use sectors… NOTES: Are Future Water Savings Included in Projections? Drop down list (y/n) Yes If "Yes" to above, state the section or page number, in the cell to the right, where citations of the codes, ordinances, or otherwise are utilized in demand projections are found. Optional Suppliers may complete Optional Submittal Table 4-4 R to quantify the expected savings. Section 4.2 Are Lower Income Residential Demands Included In Projections? Drop down list (y/n)Yes Optional If the method for accounting Lower Income Residential Demands has been included, provide page number where this accounting can be found. CWC10631 (d) (4) (A) Water use projections, where available, shall display and account for water savings estimated to result from adopted codes, standards, ordinances, or transpotation and land use plans identified by the urban water supplier, as applicable to the service area. CWC 10631 (d) (4) (B) to the extent that an urban water supplier reports the information described in subparagraph (A), an urban water supplier shall do both of the following: (i) Provide citations of the various codes, standards, ordinances or transportation and land use plans utilized in making the projections. (ii) Indicate the extent that the water use projections consider savings from codes, standards, ordinances, or transportation and land use plans. Water use projections that do not account for these water savings shall be noted of that fact. CWC 10631(a) Water use projections required by section 10631 shall include projected water use for single-family and multifamily residential housing needed for lower income households, as identified in the housing element of any city, county, or city and county, in the service area of the supplier . Submittal Table 4-3 Retail: Inclusion in Water Use Projections Water Code Section 10631 (a), 10631 (d)(4)(A), and 10631 (d)(4)(B) NOTES: DWR NOTES: Additional guidance is provided in Appendix K. Public Water System ID # Reported in Table 2-1 R Reporting Period Submitted to DWR Water Loss Audit Program (yes/no) 2020 Yes 2021 Yes 2022 Yes 2023 Yes 2024 Yes CWC 10631(d)(3) (A) The distribution system water loss shall be quantified for each of the five years preceding the plan update, in accordance with rules adopted pursuant to Section 10608.34. Submittal Table 4-5 Retail: Water Loss Audit Reporting Water Code Section 10631(d)(3)(A) CA 3710034 DWR NOTES: Suppliers will provide a link to the WUEdata submittals of their Water Loss Audit Reports. NOTES: The District's submitted Water Loss Audit Reports can be downloaded from the WUEdata portal at this link: https://wuedata.water.ca.gov/awwa_plans Report submittal status for all five years for each Public Water System as available. Add rows as needed 2028 Real Water Loss Standard per Unit per day Units for Real Water Loss Drop down list Number of Units (Connections or Miles corresponding with units selected) Volume of Total Real Loss (from AWWA Water Loss Audit) (AF) 2028 Apparent Water Loss Standard per Unit per Day Units for Apparent Water Loss Number of Connections Volume of Total Apparent Loss (from AWWA Water Loss Audit) (AF) CA 3710034 Yes 15.2 Gallons per Service Connection per Day (GPSCD) 53476 1170.629 19.5 5.6 Gallons per Service Connection per Day (GPSCD) 53476 349.633 5.8 CWC 10631(d)(3)(C) In the plan due July 1, 2021, and in each update thereafter, data shall be included to show whether the urban retail water supplier met the distribution loss standards enacted by the board pursuant to Section 10608.34. Submittal Table 4-6 Retail: Progress Towards 2028 Water Loss Standard Water Code Section 10631(d)(3)(C) NOTES: Apparent Water Loss Did the Water Board Calculate a Water Loss Standard for this Public Water System? (y/n) If no, Supplier will not complete this row. Real Water Loss Water Board's Calculated Water Loss Standards DWR NOTES: Units of measure (AF, CCF, MG) for Water Loss MUST remain consistent with units reported in Submittal Table 2-3. The units reported in Submittal Table 2-3 are used in this table's calculations. Public Water System ID # Reported in Submittal Table 2-1 R Add additional rows as needed. Most Recent AWWA Water Loss Audit Real Water Loss Per Unit per Day Most Recent AWWA Water Loss Audit Apparent Water Loss Per Unit per Day State Water Board Standard State Water Board Standard Actual 2025 GPCD (From SB X7-7 Compliance Form) Did Supplier meet the 2020 Target in 2025? No Individual Target 153 108 Yes NA 10608.40 Urban water retail suppliers shall report to the department on their progress in meeting their urban water use targets as part of their urban water management plans submitted pursuant to Section 10631. Submittal Table 5-1 Retail: SB X7-7 2020 Target Progress Water Code Section 10608.40 NOTES: Did Supplier Achieve Targeted Reduction for 2020? Actual 2020 GPCD2020 Target Regional Alliance Target or Individual Target? Drop down list DWR NOTES: Suppliers calculating a 2025 GPCD will need to complete and submit SB X 7-7 Compliance Tables to verify the use of SB X7-7 Methodologies. Suppliers that were part of a merger or consolidation since 2020 see Chapter 5 and Appendix P for guidance. NA=Not Applicable Check the box if the Supplier was not an Urban Water Supplier during or before the 2020 UWMP reporting cycle. Proceed to the next table. Only for suppliers that did not meet the Target in 2020 See DWR NOTES below. Was Supplier part of a merger or consolidation since 2020? Groundwater Type Drop Down List May use each category multiple times Potable or Non-Potable (OPTIONAL) Drop down list Location or Basin Name 2021 (AF)2022 (AF)2023 (AF)2024 (AF)2025 (AF) 0 0 0 0 0 Add additional rows as needed 10631(4) If groundwater is identified as an existing or planned source of water available to the supplier, all of the following information: (C) A detailed description and analysis of the location, amount, and sufficiency of groundwater pumped by the urban water supplier for the past five years. The description and analysis shall be based on information that is reasonably available, including, but not limited to, historic use records. Submittal Table 6-1 Retail: Groundwater Volume Pumped Water Code Section 10631(4) and 10631(4)(c) DWR NOTES: Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Submittal Table 2-3. This table identifies the unit of measure selected in Submittal Table 2-3. NOTES Total Check the box if the Supplier does not pump groundwater. Proceed to the next table. Check the box if all or part of the groundwater described below is desalinated. (OPTIONAL) Name of Wastewater Collection Agency Wastewater Volume Metered or Estimated? OPTIONAL Drop Down List Volume of Wastewater Collected from UWMP Service Area 2025 (AF) Name of Wastewater Treatment Plant (WWTP) and Place ID Number Drop down list Is WWTP Located Within UWMP Area? Drop Down List Otay Water District Metered 1,039 Ralph W Chapman WRF, Place ID 251548 Yes Otay Water District Metered 285 Point Loma WWTP & Ocean Outfall, Place ID 248796 No San Diego County Spring Valley Sanitation District Metered 623 Point Loma WWTP & Ocean Outfall, Place ID 248796 No City of Chula Vista Estimated 15,673 Point Loma WWTP & Ocean Outfall, Place ID 248796 No City of San Diego Estimated 858 Point Loma WWTP & Ocean Outfall, Place ID 248796 No City of San Diego Estimated 0 South Bay WRP, Place ID 257831 No 18,478 CWC 10633(a) A description of the wastewater collection and treatment systems in the supplier’s service area, including a quantification of the amount of wastewater collected and treated and the methods of wastewater disposal. Check the box if there is no wastewater collection system. Proceed to the next table. NOTES: SBWRP flows are reported as 0 here because flows to SBWRP come from the South Metro Sewer Interceptor, but no information is readily available that can be used to estimate how much of the 15 MGD that SBWRP treats comes from the District’s service area. District flows to SBWRP are included in the flows to the Metro system shown here as going to Point Loma WWTP. Submittal Table 6-2 Retail: Wastewater Collected Within Service Area Water Code Section 10633(a) Percentage of 2025 service area population served by wastewater collection system (OPTIONAL) Percentage of 2025 service area served by wastewater collection system (OPTIONAL) DWR NOTES: Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Submittal Table 2-3. This table identifies the unit of measure selected in Submittal Table 2-3. Additional Guidance: See Appendix M, Section M.21 for detailed guidance on this table. Wastewater Collection Recipient of Collected Wastewater Total Wastewater Received from UWMP Service Area in 2025: Add additional rows as needed Treatment Level Drop down list Volume (AF) Treatment Level Drop down list Volume (AF) Treatment Level Drop down list Volume (AF) Treatment Level Drop down list Volume (AF) Treatment Level Drop down list Volume (AF) Name of other entity Ralph W Chapman WRF, Place ID 251548 1039 1,039 Tertiary 1,039 - 0 0 0 Point Loma WWTP & Ocean Outfall, Place ID 248796 17154 17,154 - - Advanced 13998 0 - South Bay WRP, Place ID 257831 0 - Tertiary 3,156 Tertiary 623 Secondary, Disinfected - 2834 0 0 18,193 18,193 4,195 623 16,832 0 0 10633. The plan shall provide, to the extent available, information on recycled water and its potential for use as a water source in the service area of the urban water supplier...and shall include all of the following: (b) A description of the quantity of treated wastewater that meets recycled water standards, is being discharged, and is otherwise available for use in a recycled water project. 2025 Outcomes of Treated Wastewater Check the box if no wastewater is treated or disposed of within the UWMP service area. Proceed to the next table. Does This Plant Treat Wastewater Generated Outside the UWMP Service Area? (OPTIONAL) Drop down list Wastewater Treatment Plant Name and Place ID Number Drop down list Total 2025 Volume of Water Treated (AF) NOTES: As noted in Table 6-2, the flows to SBWRP are not easily determined, and are captured in total volumes for Point Loma WWTP. The volume of treated recycled water from SBWRP were reported in the City of San Diego’s 2025 Draft UWMP and reported here to show water quality and outcomes. The Point Loma WWTP effluent discharge that is not permitted recycled water use from OWD’s service area was estimated as the volume of water from the District’s service area entering the Metro system, reported as total volume of water treated at Point Loma WWTP, less the volume of recycled water from SBWRP delivered to the District. Total 2025 Volume of Wastewater Received from UWMP Service Area (As Reported in Submittal Table 6-2 R) (AF) Water Recycled Within UWMP Service Area (enter data as applicable) Submittal Table 6-3 Retail: Wastewater Treatment and Outcomes Within UWMP Service Area Water Code Section 10633(b) DWR NOTES: Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Submittal Table 2-3. This table identifies the unit of measure selected in Submittal Table 2-3. IPR: Indirect Potable Reuse would have the treatment level of its end use requirement in the Level of Treatment drop-down. Additional Guidance: See Appendix M, Section M.21 for detailed guidance on this table. Water Recycled Outside of UWMP Service Area (enter data as applicable) Effluent Discharge that is not a Permitted Recycled Water Use (enter data as applicable) Required Discharge for Instream Flow (enter data as applicable) Delivered to Another Entity for Additional Treatment (enter data as applicable) Add additional rows as needed Volume Narrative page number (OPTIONAL) Landscape irrigation (exc golf courses)Non-Potable 4,701 5,082 5,696 6,274 6,505 6,758 Golf course irrigation Non-Potable 391 364 364 364 364 364 Other (Description Required)Non-Potable Construction 78 78 78 78 78 78 0 0 0 0 0 0 0 5,170 5,524 6,138 6,716 6,947 7,200 0 5170 5524 6138 6716 6947 7200 0 0 Check box if recycled water is not used and is not planned for use within the service area of the supplier. The supplier will only complete the column on "Potential Recycled Water Use" and submit an accompanying narrative on the feasibility of that potential recycled water use. Submittal Table 6-4 Retail: Recycled Water Direct Beneficial Uses Within Service Area Water Code Section 10633 (c),(d),(e) Potential Recycled Water Use Name(s) of Facility/ies Producing (Treating) the Recycled Water (OPTIONAL) : Name of Supplier Operating the Recycled Water Distribution System (OPTIONAL) : Volume of Supplemental Water Added in 2025 (OPTIONAL) : Source of 2025 Supplemental Water (OPTIONAL) : 10633. The plan shall provide, to the extent available, information on recycled water and its potential for use as a water source in the service area of the urban water supplier... and shall include... (c) A description of the recycled water currently being used in the supplier’s service area, including, but not limited to, the type, place, and quantity of use d) A description and quantification of the potential uses of recycled water, including, but not limited to, agricultural irrigation, landscape irrigation, wildlife habitat enhancement, wetlands, industrial reuse, groundwater recharge, indirect potable reuse, and other appropriate uses, and a determination with regard to the technical and economic feasibility of serving those uses. (e) The projected use of recycled water within the supplier’s service area at the end of 5, 10, 15, and 20 years, and a description of the actual use of recycled water in comparison to uses previously projected pursuant to this subdivision. Total Use Type Drop down list Potable or Non-Potable (after treatment if treated) (OPTIONAL) Drop down list Additional Information (as needed) Add additional rows as needed DWR NOTES: Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Submittal Table 2-3. This table identifies the unit of measure selected in Submittal Table 2-3. Additional Guidance: See Appendix M, Section M.21 for detailed guidance on this table. Potential recycled water use: a description of the feasibility of these uses must be included in the narrative. Multiple Producers: If you have multiple recycled water producers, submit a separate table for each. NOTES: Recycled water is used to irrigate landscapes in multiple sectors, including commercial and temporary construction. Golf course irrigation was projected to remain constant at the recent five-year 2050 (AF)2025 (AF)2030 (AF)2035 (AF)2040 (AF)2045 (AF) Subtotal Potable Subtotal Non-Potable 2020 Projection for 2025 (AF) 2025 Actual Use (AF) 4,300 4,701 200 391 0 78 4,500 5,170 Submittal Table 6-5 Retail: 2020 UWMP Recycled Water Use Projection Compared to 2025 Actual Water Code Section 10633(e) Check the box if recycled water was not used in 2025 nor previously projected for use in 2020. Proceed to the next table. Add additional rows as needed Landscape irrigation (exc golf courses) NOTES: Recycled water is used to irrigate landscapes in multiple sectors, including commercial and construction Total DWR NOTES: Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Submittal Table 2-3. This table identifies the unit of measure reported in Submittal Table 2-3 Additional Guidance: See Appendix M, Section M.21 for detailed guidance on this table. Use Type Drop Down list 10633. The plan shall provide, to the extent available, information on recycled water and its potential for use as a water source in the service area of the urban water supplier. The preparation of the plan shall be coordinated with local water, wastewater, groundwater, and planning agencies that operate within the supplier’s service area, and shall include all of the following: (e) ...a description of the actual use of recycled water in comparison to uses previously projected pursuant to this subdivision Golf course irrigation Other (Description Required) Name of Action Description Expected Increase in Recycled Water Use (AF) Code of Ordinance Section 26 Continue to require new developments within the District to use recycled water, wherever feasible 326 326 326 Total (AF) 10633. The plan shall provide, to the extent available, information on recycled water and its potential for use as a water source in the service area of the urban water supplier. The preparation of the plan shall be coordinated with local water, wastewater, groundwater, and planning agencies that operate within the supplier’s service area, and shall include all of the following: (f) a description of actions, including financial incentives, which may be taken to encourage the use of recycled water, and the projected results of these actions in terms of acre feet of recycled water used per year. DWR NOTES: Units of measure (AF, CCF, MG) MUST remain consistent with units reported in Submittal Table 2-3. This table identifies the unit of measure selected in Submittal Table 2-3. The unit conversion to Acre Feet addresses the Water Code's requirement that this value be provided in acre-feet. NOTES: Planned implementation would span 2025-2050. Recycled water volume derived from estimates provided for the following planned developments in Water Supply Assessment and Verification Reports, Sub-Area Master Plans, and other planning documents: Sunbow II Phase 3 Project (2020), Village 3 North (2022), Otay Ranch Town Center Redevelopment (2023), Rancho del Otay (2025), and Village 8 East (2025) Submittal Table 6-6 Retail: Methods to Encourage Future Recycled Water Use Water Code Section 10633(f) Check the box if the Supplier does not plan to expand recycled water use in the future. Supplier will not complete the table below but will provide narrative explanation. Provide page location of narrative in the UWMP Add additional rows as needed Unit Conversion to AF Planned Implementation Year 2025 - 2050 Water Supply Drop down list May use each category multiple times. These are the only water supply categories that will be recognized by the WUEdata online submittal tool Potable or Non-Potable (after treatment if treated) (OPTIONAL) Drop Down list Actual Volume (AF) Total Entitlement (OPTIONAL) See 'DWR Notes' below (AF) Purchased or Imported Water Potable 30,000 30,000 Recycled Water Non-Potable 5,170 7,820 30,000 30,000 5,170 7,820 35,170 37,820 10631. A plan shall be adopted in accordance with this chapter that shall do all of the following... (b) Identify and quantify, to the extent practicable, the existing and planned sources of water available to the supplier over the same five-year increments described in subdivision (a), providing supporting and related information... Submittal Table 6-8 Retail: Water Supplies — Actual Water Code Section 10631(b) 2025 NOTES: Recycled water is sourced from Ralph W. Chapman Water Recycling Facility (RWCWRF) and the City of San Diego’s South Bay Water Reclamation Plant (SBWRP). DWR NOTES: Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Submittal Table 2-3. This table identifies the unit of measure selected in Submittal Table 2-3. Total Entitlement: e.g. Water Right, Groundwater Allocation, Contracted Amount. Add additional rows as needed Total Subtotal Potable Subtotal Non-Potable Additional Description (as needed) Water Supply Reasonably Available Volume (AF) Total Entitlement (OPTIONAL) See 'DWR Notes' below (AF) Reasonably Available Volume (AF) Total Entitlement (OPTIONAL) See 'DWR Notes' below (AF) Reasonably Available Volume (AF) Total Entitlement (OPTIONAL) See 'DWR Notes' below (AF) Reasonably Available Volume (AF) Total Entitlement (OPTIONAL) See 'DWR Notes' below (AF) Reasonably Available Volume (AF) Total Entitlement (OPTIONAL) See 'DWR Notes' below (AF) Purchased or Imported Water Potable 34,960 34,960 38,597 38,597 43,293 43,293 45,416 45,416 47,634 47,634 Recycled Water Non-Potable 5,524 7,820 6,138 7,820 6,716 7,820 6,947 7,820 7,200 7,820 Purchased or Imported Water Backup Potable -10,000 -10,000 -10,000 -10,000 -10,000 34,960 44,960 38,597 48,597 43,293 53,293 45,416 55,416 47,634 57,634 5,524 7,820 6,138 7,820 6,716 7,820 6,947 7,820 7,200 7,820 40,484 52,780 44,735 56,417 50,009 61,113 52,363 63,236 54,834 65,454 10631. A plan shall be adopted in accordance with this chapter that shall do all of the following... (b) Identify and quantify, to the extent practicable, the existing and planned sources of water available to the supplier over the same five-year 2050 (opt) Add additional rows as needed Total NOTES: The District is authorized to purchase up to 10 million gallons per day (mgd) of supply from the City of San Diego Otay WTP. The District considers the supply of water from the Otay WTP to be an alternative source for use when the Water Authority Pipeline No. 4 is out of service. The District’s expected recycled water supply is 7,820 AFY; if needed, additional recycled water could be supplied by the City of San Diego. 2030 2035 2040 2045 Subtotal Non-Potable Subtotal Potable DWR NOTES: Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Submittal Table 2-3. Total Entitlement: e.g. Water Right, Groundwater Allocation, Contracted Amount. Submittal Table 6-9 Retail: Water Supplies — Projected Water Code Section 10631 (b) Projected Water Supply (Report to the Extent Practicable) Drop down list May use each category multiple times. These are the only water supply categories that will be recognized by the WUEdata online submittal tool Additional Detail on Water Supply Potable or Non-Potable (after treatment if treated) (OPTIONAL) Drop Down list % of Average Supply Average Year 1991- 2020 100% Single-Dry Year 2013, 2018, and 2021 106% Consecutive Dry Years 1st Year 2011 107% Consecutive Dry Years 2nd Year 2012 108% Consecutive Dry Years 3rd Year 2013 109% Consecutive Dry Years 4th Year 2014 110% Consecutive Dry Years 5th Year 2015 111% 51,690 52,186 Notes: Volume available reflects the average volume expected to be available under the hydrologic conditions for the given scenario, based on the analysis of projected supply availability from Water Authority and District supply mix. Volume available includes both potable and non-potable. The Water Authority's supply reliability analysis shows sufficient supplies to meet demands in all future scenarios. 52,682 53,184 53,694 DWR NOTES: Supplier may use multiple versions of Submittal Table 7-1 R if different water sources have different base years and the supplier chooses to report the base years for each water source separately. If a Supplier uses multiple versions of Submittal Table 7-1 R, in the "Note" section of each submittal table, state that multiple versions of Submittal Table 7-1 R are being used and identify the particular water source that is being reported in each submittal table. Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Submittal Table 2-3. This table reports the units of measure reported in Submittal Table 2-3. 48,485 51,523 Year Type Base Year If not using a calendar year, type in the last year of the fiscal, water year, or range of years, for example, water year 2024- 2025, use 2025 Optional Submittal Table 7-1 Retail: Basis of Water Year Data (Reliability Assessment) Available Supplies if Year Type Repeats Check the box if quantification of available supplies is not compatible with this table and is provided elsewhere in the UWMP. Location: [insert location from UWMP] Volume Available (AF) Quantification of available supplies is provided in this table as either volume only, percent only, or both. 2030 (AF)2035 (AF)2040 (AF)2045 (AF)2050 (AF) Supply totals (autofill from Submittal Table 6-9 R) 40,484 44,735 50,009 52,363 54,834 2030 (AF)2035 (AF)2040 (AF)2045 (AF)2050 (AF)2030 (AF)2035 (AF)2040 (AF)2045 (AF)2050 (AF) Use totals (autofill from Submittal Table 4-2 R) 40,484 44,735 50,009 52,363 54,834 Supply totals (autofill from Submittal Table 6-9 R) 34,960 38,597 43,293 45,416 47,634 Supply totals (autofill from Submittal Table 6-9 R) 5,524 6,138 6,716 6,947 7,200 Surplus/(shortfall)0 0 0 0 0 Use totals (autofill from Submittal Table 4-2 R) 34,960 38,597 43,293 45,416 47,634 Use totals (autofill from Submittal Table 4-2 R) 5,524 6,138 6,716 6,947 7,200 Surplus/(shortfall)0 0 0 0 0 Surplus/(shortfall)0 0 0 0 0 WSCP - supply augmentation benefit WSCP - use reduction savings benefit WSCP - supply augmentation benefit WSCP - supply augmentation benefit Revised Surplus/(shortfall)WSCP - use reduction savings benefit WSCP - use reduction savings benefit Revised Surplus/(shortfall)Revised Surplus/(shortfall) 10635. (a) Every urban water supplier shall include, as part of its urban water management plan, an assessment of the reliability of its water service to its customers during normal, dry, and multiple dry water years. This water supply and demand assessment shall compare the total water supply sources available to the water supplier with the long-term total projected water use over the next 20 years, in five-year OPTIONAL Planned WSCP Actions Submittal Table 7-2 Retail: Normal Year Supply and Use Comparison Water Code Section 10635 (a) NOTES: Volume includes both potable and non-potable. Water Authority UWMP analysis shows 100 percent supply reliability for these conditions; total supplies are, therefore, set equal to District projected demands. DWR NOTES : Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Submittal Table 2-3. If you choose to fill these optional tables, please paste the combined information in the submittal table to the left. OPTIONAL Submittal Table 7-2 Retail: Normal Year Supply and Use Comparison - POTABLE OPTIONAL Planned WSCP Actions NOTES: OPTIONAL Submittal Table 7-2 Retail: Normal Year Supply and Use Comparison - NON-POTABLE OPTIONAL Planned WSCP Actions NOTES: Supply totals 43,021 47,538 53,143 55,644 58,270 Use totals 43,021 47,538 53,143 55,644 58,270 Surplus/(shortfall)0 0 0 0 0 WSCP - supply augmentation benefit WSCP - use reduction savings benefit Revised Surplus/(shortfall) Submittal Table 7-3 Retail: Single Dry Year Supply and Use Comparison Water Code Section 10635(a) OPTIONAL Planned WSCP Actions 2030 (AF)2035 (AF)2040 (AF)2045 (AF) 10635. (a) Every urban water supplier shall include, as part of its urban water management plan, an assessment of the reliability of its water service to its customers during normal, dry, and multiple dry water years. This water supply and demand assessment shall compare the total water supply sources available to the water supplier with the long-term total projected water use over the next 20 years, in five- year increments, for a normal water year, a single dry water year, and a drought lasting five consecutive water years. DWR NOTES : Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Submittal Table 2-3. NOTES: Volume includes both potable and non-potable. Water Authority UWMP analysis shows 100 percent supply reliability for these conditions; total supplies are, therefore, set equal to District projected demands. 2050 (AF) 2030 (AF)2035 (AF)2040 (AF)2045 (AF)2050 (AF) Supply totals 43,160 47,692 53,315 55,824 58,459 Use totals 43,160 47,692 53,315 55,824 58,459 Surplus/(shortfall)0 0 0 0 0 WSCP - supply augmentation benefit WSCP - use reduction savings benefit Revised Surplus/(shortfall) Supply totals 43,575 48,150 53,827 56,360 59,020 Use totals 43,575 48,150 53,827 56,360 59,020 Surplus/(shortfall)0 0 0 0 0 WSCP - supply augmentation benefit WSCP - use reduction savings benefit Revised Surplus/(shortfall) Supply totals 43,988 48,607 54,338 56,895 59,580 Use totals 43,988 48,607 54,338 56,895 59,580 Surplus/(shortfall)0 0 0 0 0 WSCP - supply augmentation benefit WSCP - use reduction savings benefit Revised Surplus/(shortfall) Supply totals 44,407 49,070 54,855 57,437 60,148 Use totals 44,407 49,070 54,855 57,437 60,148 Surplus/(shortfall)0 0 0 0 0 WSCP - supply augmentation benefit WSCP - use reduction savings benefit Revised Surplus/(shortfall) Supply totals 44,833 49,541 55,382 57,989 60,725 Use totals 44,833 49,541 55,382 57,989 60,725 Surplus/(shortfall)0 0 0 0 0 WSCP - supply augmentation benefit WSCP - use reduction savings benefit Revised Surplus/(shortfall) NOTES: Volume includes both potable and non-potable. Under the third, fourth, and fifth year of the Multiple Dry Year scenario, recycled water demands exceed non-potable supply capacity in 2050. For those years, recycled water demand is supplemented with additional purchases of potable water from the Water Authority, which has sufficient supplies to meet these demands. Water Authority UWMP analysis shows 100 percent supply reliability for these conditions; total supplies, therefore, are set equal to District projected demands. 10635. (a) Every urban water supplier shall include, as part of its urban water management plan, an assessment of the reliability of its water service to its customers during normal, dry, and multiple dry water years. This water supply and demand assessment shall compare the total water supply sources available to the water supplier with the long-term total projected water use over the next 20 years, in five-year increments, for a normal water year, a single dry water First year OPTIONAL WSCP Actions Second year Third year Fifth year DWR NOTES: Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Submittal Table 2-3. OPTIONAL Planned WSCP Actions OPTIONAL Planned WSCP Actions OPTIONAL Planned WSCP ActionsFourth year Submittal Table 7-4 Retail: Multiple Dry Years Supply and Use Comparison Water Code Section 10635(a) OPTIONAL Planned WSCP Actions 2026 Total Total Water Use (AF)38,335 Total Supplies (AF)38,335 Surplus/Shortfall w/o WSCP Action 0 WSCP - supply augmentation benefit (AF) WSCP - use reduction savings benefit (AF) Revised Surplus/(shortfall) 2027 Total Total Water Use (AF)38,335 Total Supplies (AF)38,335 Surplus/Shortfall w/o WSCP Action 0 WSCP - supply augmentation benefit (AF) WSCP - use reduction savings benefit (AF) Revised Surplus/(shortfall) 2028 Total Total Water Use (AF)39,039 Total Supplies (AF)39,039 Surplus/Shortfall w/o WSCP Action 0 WSCP - supply augmentation benefit (AF) WSCP - use reduction savings benefit (AF) Revised Surplus/(shortfall) 2029 Total Total Water Use (AF)40,094 Total Supplies (AF)40,094 Surplus/Shortfall w/o WSCP Action 0 WSCP - supply augmentation benefit (AF) WSCP - use reduction savings benefit (AF) Revised Surplus/(shortfall) 2030 Total Total Water Use (AF)40,797 Total Supplies (AF)40,797 Surplus/Shortfall w/o WSCP Action 0 WSCP - supply augmentation benefit (AF) WSCP - use reduction savings benefit (AF) Revised Surplus/(shortfall) 10635 (b) Every urban water supplier shall include, as part of its urban water management plan, a drought risk assessment for its water service... The drought risk assessment shall include each of the following: (1) A description of the data, methodology, and basis for one or more supply shortage conditions that are necessary to conduct a drought risk assessment for a drought period that lasts five consecutive water years, starting from the year following when the assessment is conducted. (2) A determination of the reliability of each source of supply under a variety of water shortage conditions. This may include a determination that a particular source of water supply is fully reliable under most, if not all, conditions. (3) A comparison of the total water supply sources available to the water supplier with the total projected water use for the drought period. (4) Considerations of the historical drought hydrology, ... NOTES: DWR NOTES: Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Submittal Table 2-3. Submittal Table 7-5 Retail: Five-Year Drought Risk Assessment Water Code Section 10635(b)(3) OPTIONAL Planned WSCP Actions (use reduction and supply augmentation) OPTIONAL Planned WSCP Actions (use reduction and supply augmentation) OPTIONAL Planned WSCP Actions (use reduction and supply augmentation) OPTIONAL Planned WSCP Actions (use reduction and supply augmentation) OPTIONAL Planned WSCP Actions (use reduction and supply augmentation) Standard Shortage Levels Percent Shortage Range Suppliers Shortage Levels Percent Shortage Range 1 Up to 10%1 Up to 10% 2 Up to 20%2 Up to 20% 3 Up to 30%3 Up to 30% 4 Up to 40%4 Up to 40% 5 Up to 50%5 Up to 50% 6 >50%6 >50% (B) An urban water supplier with an existing water shortage contingency plan that uses different water shortage levels may comply with the requirement in subparagaph (A) by developing and including a cross-reference relating its existing categores to the six standard water shortage levels. Submittal Table 8-1: Cross-reference for Standard vs Supplier Shortage Levels Water Code Section 10632(a)(3)(B) Check the box if the Supplier uses the Standard six levels of water shortage. Proceed to the next table. NOTES: 10632 (a) Every urban water supplier shall prepare and adopt a water shortage contingency plan as part of its urban water management plan that consists of each of the following elements: (3)(A)Six standard water shortage levels corresponding to progressive ranges of up to 10, 20, 30, 40, and 50 percent shortages and greater than 50 percent shortage. Urban water suppliers shall define these shortage levels based on the suppliers’ water supply conditions, including percentage reductions in water supply, changes in groundwater levels, changes in surface elevation or level of subsidence, or other changes in hydrological or other local conditions indicative of the water supply available for use. Shortage levels shall also apply to catastrophic interruption of water supplies, including, but not limited to, a regional power outage, an earthquake, and other potential emergency events. Yes Volume or Percentage Drop down Shortage Gap Reduction Value (May be a range) (AF) All Other Purchases Percentage 5% - 10%Water purchase from City of San Diego All Stored Emergency Supply Percentage 5% - 10%Otay Water District storage and Water Authority Emergency Storage Plan (E) For each action, an estimate of the extent to which the gap between supplies and demand will be reduced by implementation of the action. Submittal Table 8-2 Retail: Supply Augmentation and Other Actions Water Code Section 10632(a)(4)(A),(C) and (E) Add additional rows as needed NOTES: Is the Supplier completing this table using the standard six levels? (yes/no) 10632(a)(4) Shortage response actions that align with the defined shortage levels and include, at a minimum, all of the following: (A) Locally appropriate supply augmentation actions. (C) Locally appropriate operational changes. How much is this going to reduce the shortage gap? DWR NOTES: Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Submittal Table 2-3. Shortage Level Supply Augmentation Methods and Other Actions by Water Supplier Drop down list These are the only categories that will be accepted by the WUEdata online submittal tool Additional Explanation or Reference (OPTIONAL) Yes Volume or Percentage Drop down Shortage Gap Reduction Value (May be a range) (AF) All Landscape - Restrict or prohibit runoff from landscape irrigation Percentage N/A Prevent water waste resulting from inefficient irrigation, such as runoff or overspray. Similarly, stop water flows onto non-targeted areas, such as adjacent property, non-irrigated areas, hardscapes, roadways, or structures. Yes All CII - Restaurants may only serve water upon request Percentage N/A Serve and refill water in restaurants and other food service establishments only upon request. Yes All CII - Lodging establishment must offer opt out of linen service Percentage N/A Offer guests in hotels, motels, and other commercial lodging establishments the option of not laundering towels and linens daily. Yes All Water Features - Restrict water use for decorative water features, such as fountains Percentage N/A Use only re-circulated water in fountains or other decorative water features.Yes All Other - Require automatic shut of hoses Percentage N/A Wash automobiles with a hose equipped only with a positive shut-off nozzle.Yes All Landscape - Prohibit certain types of landscape irrigation Percentage N/A Irrigating ornamental turf on public street medians only with recycled water if available.Yes All Other - Customers must repair leaks, breaks, and malfunctions in a timely manner Percentage N/A Repair all water leaks within forty-eight (48) hours of notification by the District unless other arrangements are made with the General Manager or designee. Yes All Landscape - Other landscape restriction or prohibition Percentage N/A Irrigation is not allowed during a rainstorm or for forty-eight (48) hours after one-quarter inch or more of rainfall is measured at Lindbergh Field. Yes All Other - Prohibit use of potable water for washing hard surfaces Percentage N/A No washing down of paved surfaces, including but not limited to sidewalks, driveways, parking lots, tennis courts, or patios, except when it is necessary to alleviate safety or sanitation hazards. Yes 1 Landscape - Limit landscape irrigation to specific times Percentage 5% - 10% Irrigate residential and commercial landscape before 10 a.m. and after 6 p.m. only. Customers are to water no more than three days a week using the suggested watering schedule as found on the District’s web page. New plantings and newly seeded areas are exempt for 30 days. No 1 Other - Require automatic shut of hoses Percentage 1% - 5% Use a hand-held hose equipped with a positive shut- off nozzle or bucket to water landscaped areas, including trees and shrubs located on residential and commercial properties that are not irrigated by a landscape irrigation system. No 1 Landscape - Limit landscape irrigation to specific times Percentage 5% - 10% Irrigate nursery and commercial grower’s products before 10 a.m. and after 6 p.m. only. Watering is permitted at any time with a hand-held hose equipped with a positive shut-off nozzle, a bucket, or when a drip/micro-irrigation system/equipment is used. Irrigation of nursery propagation beds is permitted at any time. Watering of livestock is permitted at any time. No 1 Other Percentage 1% - 5% Wash vehicles, including but not limited to motorcycles, farm equipment, trailers, boats and boat engines and motorhomes using a bucket and a hand-held hose with positive shut-off nozzle, mobile high pressure/low volume wash system, or at a commercial site that re-circulates (reclaims) water on-site. Vehicle washing is limited to once per week. No 1 Other Percentage 5% - 10% Use recycled or non-potable water for construction purposes when available.No Shortage Level Demand Reduction Actions Drop down list These are the only categories that will be accepted by the WUEdata online submittal tool. Select those that apply. Additional Explanation or Reference (OPTIONAL) Penalty, Charge, or Other Enforcement? For Retail Suppliers Only Drop Down List Is the Supplier completing this table using the standard six levels? (yes/no) Submittal Table 8-3 Retail: Demand Reduction Actions Water Code Section 10632(a)(4)(B),(D), and (E) Add additional rows as needed How much is this going to reduce the shortage gap? 2 Landscape - Limit landscape irrigation to specific times Percentage 5% - 10% Irrigate residential and commercial landscape before 10 a.m. and after 6 p.m. only. Customers are to water no more than three days a week using the suggested watering schedule as found on the District’s web page. New plantings and newly seeded areas are exempt for 30 days. Yes 2 Other - Require automatic shut of hoses Percentage 1% - 5% Use a hand-held hose equipped with a positive shut- off nozzle or bucket to water landscaped areas, including trees and shrubs located on residential and commercial properties that are not irrigated by a landscape irrigation system. Yes 2 Landscape - Limit landscape irrigation to specific times Percentage 5% - 10% Irrigate nursery and commercial grower’s products before 10 a.m. and after 6 p.m. only. Watering is permitted at any time with a hand-held hose equipped with a positive shut-off nozzle, a bucket, or when a drip/micro-irrigation system/equipment is used. Irrigation of nursery propagation beds is permitted at any time. Watering of livestock is permitted at any time. Yes 2 Other Percentage 1% - 5% Wash vehicles, including but not limited to motorcycles, farm equipment, trailers, boats and boat engines and motorhomes using a bucket and a hand-held hose with positive shut-off nozzle, mobile high pressure/low volume wash system, or at a commercial site that re-circulates (reclaims) water on-site. Vehicle washing is limited to once per week. Yes 2 Other Percentage 5% - 10%Use recycled or non-potable water for construction purposes when available.Yes 2 Landscape - Limit landscape irrigation to specific days Percentage 5% - 10% Limit residential and commercial landscape irrigation to no more than three (3) assigned days per week on a schedule established by the General Manager or designee and posted by the District. Yes 2 Landscape - Other landscape restriction or prohibition Percentage 5% - 10% Limit lawn watering and landscape irrigation using sprinklers to no more than ten (10) minutes per watering station per day. Yes 2 Landscape - Other landscape restriction or prohibition Percentage 5% - 10% Water landscaped areas, including trees and shrubs located on residential and commercial properties, and not irrigated by a landscape irrigation system on the same schedule set forth above by using a bucket, hand-held hose with positive shut-off nozzle, or low- volume non-spray irrigation. Yes 2 Water Features - Restrict water use for decorative water features, such as fountains Percentage 1% - 5%Stop operating fountains or similar decorative water features unless recycled water is used.Yes 3 Landscape - Limit landscape irrigation to specific days Percentage 5% - 10% Limit residential and commercial landscape irrigation to no more than two (2) assigned days per week on a schedule established by the General Manager or designee and posted by the District. Yes 3 Landscape - Other landscape restriction or prohibition Percentage 5% - 10% Water landscaped areas, including trees and shrubs located on residential and commercial properties, and not irrigated by a landscape irrigation system on the same schedule set forth above by using a bucket, hand-held hose with a positive shut-off nozzle, or low-volume non-spray irrigation. Yes 3 Other - Prohibit vehicle washing except at facilities using recycled or recirculating water Percentage 1% - 5%Stop washing vehicles except at commercial carwashes that re-circulate water.Yes 3 Moratorium or Net Zero Demand Increase on New Connections Percentage 5% - 10% The District will suspend consideration of annexations to its service area.Yes 3 Implement or Modify Drought Rate Structure or Surcharge Percentage 10% - 30%The District may establish a water allocation for property served by the District.Yes 4 Water Features - Restrict water use for decorative water features, such as fountains Percentage 1% - 5%Stop filling or re-filling ornamental lakes or ponds, except to the extent needed to sustain aquatic life.Yes 5 Landscape - Other landscape restriction or prohibition Percentage 5% - 10% Stop all landscape irrigation, except crops and landscape products of commercial growers and nurseries, subject to some exceptions specified in the ordinance. Yes 5 Other - Customers must repair leaks, breaks, and malfunctions in a timely manner Percentage 5% - 10% Repair all water leaks within twenty-four (24) hours of notification by the District unless other arrangements are made with the District. Yes 5 Moratorium or Net Zero Demand Increase on New Connections Percentage 5% - 10% No new potable water service shall be provided, no new temporary meters or permanent meters shall be provided and no statements of immediate ability to serve or provide potable water service (such as, will serve letters, certificates, or letters of availability) shall be issued, except under certain circumstances. Yes 6 Landscape - Other landscape Percentage 10% - 20%Stop all landscape irrigation, except crops and Yes (D) Additional, mandatory prohibitions against specific water use practices that are in addition to state-mandated prohibitions and appropriate to the local conditions. (E) For each action, an estimate of the extent to which the gap between supplies and demand will be reduced by implementation of the action. (B) Locally appropriate demand reduction actions to adequately respond to shortages. NOTES: N/A = Not Applicable. These actions are always in effect through a District Ordinance and should not affect the shortage gap significantly. DWR NOTES: Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Submittal Table 2-3. 10632(a)(4) Shortage response actions that align with the defined shortage levels and include, at a minimum, all of the following: City Name 60 Day Notice Drop Down (yes/no) Notice of Public Hearing Drop Down (yes/no) City of San Diego Yes Yes City of Chula Vista Yes Yes County Name Drop Down List 60 Day Notice Drop Down (yes/no) Notice of Public Hearing Drop Down (yes/no) San Diego County Yes Yes CWC 10642 The water supplier is to provide the time and place of the hearing to any city or county within which the supplier provides water. CWC 10621 (b)Notify at least 60 days prior to the public hearing any city or county within which the supplier provides water that the urban water supplier will be reviewing the plan and considering amendments or changes to the plan. Submittal Table 10-1 Retail: Notification to Cities and Counties Water Code Section 10621(b) and 10642 Add additional rows as needed Add additional rows as needed NOTES: 9665 Chesapeake Drive, Suite 320 San Diego, CA 92123 (800) 426-4262 woodardcurran.com