HomeMy WebLinkAbout10-10-05 WR&S Committee Packet
DRAFT 2005 Urban
Water Management Plan
Prepared by
Otay Water District
and
MWH Americas, Inc.
Otay Water District
Otay Water District
2005 Urban Water Management Plan
Prepared by:
Otay Water District
&
MWH Americas, Inc.
OTAY WATER DISTRICT 2005 URBAN WATER MANAGEMENT PLAN
i 10/7/2005
Table of Contents
1. Introduction..................................................................................................................... 1
1.1 Agency Coordination..........................................................................................................................1
1.2 Resource Maximization......................................................................................................................2
1.3 Senate Bills 610 and 221....................................................................................................................3
2. Service Area, Demands, and Supplies ............................................................................ 4
2.1 Appropriate Level of Planning...........................................................................................................4
2.2 Service Area Description....................................................................................................................4
2.3 Water Sources.....................................................................................................................................9
2.3.1 Potable Water .............................................................................................................................9
2.3.2 Recycled Supply .......................................................................................................................10
2.3.3 Groundwater.............................................................................................................................11
2.4 Reliability of Supply.........................................................................................................................11
2.5 Transfer or Exchange Opportunities.................................................................................................12
2.6 Water Use by Type for Past, Current and Future Deliveries............................................................12
2.7 Demand Management Measures.......................................................................................................15
2.8 Evaluation of Demand Management Measures not Implemented....................................................20
2.9 Planned Water Supply Projects and Programs..................................................................................20
2.10 Desalination......................................................................................................................................21
2.11 Wholesale Water ..............................................................................................................................22
3. Determination of DMM Implementation...................................................................... 24
4. Water Shortage Contingency Plan................................................................................ 25
4.1 Stages of Action ...............................................................................................................................25
4.2 Estimate of Minimum Supply for Next Three Years........................................................................25
4.3 Catastrophic Supply Interruption Plan..............................................................................................26
4.4 Prohibitions, Penalties and Consumption Reduction Methods.........................................................27
4.5 Revenue Impacts of Reduced Sales During Shortages.....................................................................28
4.6 Draft Ordinance and Use Monitoring Procedure..............................................................................30
4.6.1 Water Shortage Contingency Ordinance/Resolution................................................................30
4.6.2 Mechanism to Determine Reductions in Water Use.................................................................30
5. Recycled Water Plan..................................................................................................... 31
5.1 Coordination.....................................................................................................................................31
5.2 Wastewater Quantity, Quality and Current Uses..............................................................................31
5.2.1 Wastewater Collection & Treatment ........................................................................................31
5.2.2 Recycled Water Uses................................................................................................................32
5.3 Potential and Projected Use, Optimization Plan with Incentives.....................................................32
5.3.1 Potential Uses of Recycled Water ............................................................................................32
5.3.2 Recycled Water Demand Projections.......................................................................................33
5.3.3 Proposed Actions to Encourage Use of Recycled Water..........................................................34
6. Water Quality Impacts on Reliability............................................................................ 35
6.1 Potable Water...................................................................................................................................35
6.1.1 Colorado River .........................................................................................................................35
6.1.2 State Water Project...................................................................................................................36
6.1.3 Local Surface Water.................................................................................................................36
6.1.4 Pacific Ocean............................................................................................................................36
6.1.5 Groundwater.............................................................................................................................37
6.2 Recycled Water ................................................................................................................................37
7. Water Service Reliability.............................................................................................. 38
7.1 Projected Normal Water Year Supply and Demand.........................................................................38
7.2 Projected Single-Dry-Year Supply and Demand Comparison .........................................................38
7.3 Projected Multiple-Dry-Year Supply and Demand Comparison......................................................39
8. Adoption and Implementation of UWMP..................................................................... 41
OTAY WATER DISTRICT 2005 URBAN WATER MANAGEMENT PLAN
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Appendices
Appendix A Text of Urban Water Management Planning Act
Appendix B Agreement with San Diego County Water Authority for Potable
Water Supply from Helix Water District
Appendix C Agreement with City of San Diego for Potable Water Supply for
Otay Water Treatment Plant
Appendix D Agreement with City of San Diego for Recycled Water Supply from
South Bay Water Reclamation Plant
Appendix E BMP Reports 2001 - 2004
Appendix F District Draft Code of Ordinance Section 39
Appendix G District Code of Ordinance Section 26
Appendix H Adoption Resolution and Related Documentation
OTAY WATER DISTRICT 2005 URBAN WATER MANAGEMENT PLAN
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List of Tables
Table 1. Coordination with Appropriate Agencies............................................................................................2
Table 2. Population – Current and Projected.....................................................................................................6
Table 3. Climate Data.........................................................................................................................................8
Table 4. Current and Planned Water Supplies – AF/yr ...................................................................................10
Table 5. Current Water Use and Customers by Customer Type......................................................................13
Table 6. Water Consumption Excluding Conservation and Losses – AF/yr ...................................................14
Table 7. Estimated Growth in Customers Served............................................................................................14
Table 8. Additional Water Uses and Losses – AF/yr ......................................................................................15
Table 9. Total Water Use – AF/yr...................................................................................................................15
Table 10. Best Management Practices for Urban Water Conservation in California......................................17
Table 11. Future Water Supply Projects..........................................................................................................21
Table 12. Agency Demand Projections Provided to Wholesale Supplier – AF/yr..........................................22
Table 13. Wholesaler Sources of Water Potentially Available to District – AF/yr..........................................23
Table 14 Water Supply Shortage Stages and Conditions................................................................................25
Table 15 Three-Year Estimated Minimum Water Supply – AF/Year.............................................................26
Table 16. Mandatory Prohibitions...................................................................................................................27
Table 17. Consumption Reduction Methods...................................................................................................28
Table 18. Penalties and Charges......................................................................................................................28
Table 19. Actions and Conditions that Impact Revenues................................................................................29
Table 20. Actions and Conditions that Impact Expenditures ..........................................................................29
Table 21. Proposed Measures to Overcome Revenue Impacts........................................................................29
Table 22. Water Use Monitoring Mechanisms.................................................................................................30
Table 23. Participating Agencies.....................................................................................................................31
Table 24. Wastewater Collected and Treated in District’s Wastewater Service Area – AF/yr ........................31
Table 25. Recycled Water Uses – Actual AF/yr..............................................................................................32
Table 26. Recycled Water Uses – Potential AF/yr..........................................................................................33
Table 27. Projected Future Use of Recycled Water in Service Area – AF/yr .................................................33
Table 28. Recycled Water Uses – 2000 Projection Compared with 2005 Actual – AF/yr..............................34
Table 29. Projected Normal Year Supply and Demand Comparison – AF/yr.................................................38
Table 30. Projected Single Dry Year Supply and Demand Comparison – AF/yr............................................39
Table 31. Projected Supply and Demand Comparison during Multiple Dry Year Period Ending in 2010 –
AF/yr ........................................................................................................................................................39
Table 32. Projected Supply and Demand Comparison during Multiple Dry Year Period Ending in 2015 –
AF/yr ........................................................................................................................................................40
Table 33. Projected Supply and Demand Comparison during Multiple Dry Year Period Ending in 2020 –
AF/yr ........................................................................................................................................................40
Table 34. Projected Supply and Demand Comparison during Multiple Dry Year Period Ending in 2025 –
AF/yr ........................................................................................................................................................40
Table 35. Projected Supply and Demand Comparison during Multiple Dry Year Period Ending in 2030 –
AF/yr ........................................................................................................................................................40
List of Figures
Figure 1. Otay Water District Service Area........................................................................................................5
Figure 2. Average Temperature and Precipitation..............................................................................................8
Figure 3. District Conservation Programs Annual Water Savings...................................................................19
Figure 4. District’s Projected Recycled Water Demand..................................................................................34
OTAY WATER DISTRICT 2005 URBAN WATER MANAGEMENT PLAN
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Abbreviations
Act Urban Water Management Planning Act
AF acre-feet
AF/yr acre-feet per year
BMP Best Management Practice
CII Commercial/Industrial/Institutional
CIMIS California Irrigation Management Information System
CLIP Commercial Landscape Incentive Program
CUWCC California Urban Water Conservation Council
District Otay Water District
DWR California Department of Water Resources
ERP Emergency Response Plan
ESP Emergency Storage Project
FCF Flow Control Facility
FY Fiscal Year
gpd gallons per day
GIS Geographical Information System
HEW High-Efficiency Washer
IID Imperial Irrigation District
IRP Integrated Resources Plan
IRWMP Integrated Regional Water Management Plan
LMSE La Mesa-Sweetwater Extension (pipeline)
mgd million gallons per day
mg/L milligrams per liter
Metropolitan Metropolitan Water District of Southern California
MOU Memorandum of Understanding
MTBE Methyl Tertiary Butyl Ether
MWWD Metropolitan Wastewater Department, City of San Diego
PALM Professional Assistance for Landscape Management
QSA Quantification Settlement Agreements
RO Reverse Osmosis
RWCWRF Ralph W. Chapman Water Recycling Facility
SANDAG San Diego Association of Governments
SB Senate Bill
SBWRP South Bay Water Reclamation Plant
SCADA Supervisory Control and Data Acquisition
SPV San Pasqual Valley
SWP State Water Project
TDS Total Dissolved Solids
TOC Total Organic Carbon
ULFT Ultra Low Flow Toilet
UMWP Urban Water Management Plan
VIP Voucher Incentive Program
Water Authority San Diego County Water Authority
WBIC Weather-Based Irrigation Controller
WTP Water Treatment Plant
OTAY WATER DISTRICT 2005 URBAN WATER MANAGEMENT PLAN
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1. Introduction
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).
The 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 urban water
management plan at least once every five years on or before December 31, in years ending
in five and zero. Sections 10610 through 10657 of the California 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 December 31, 2005. Appendix A
contains the text of the Act.
This report has been organized to follow the UWMP guidance manual prepared by DWR.
It 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 to its customers.
The District maintains its records of water use on a fiscal year (FY) that runs from July 1
through June 30. For example, FY 2005 runs from July 1, 2004 through June 30, 2005. In
this document, projections of water demand over the course of a year are reported for fiscal
years. 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.
1.1 Agency Coordination
The District is a member public agency of the San Diego County Water Authority (Water
Authority), and the Water Authority is a member public agency of the Metropolitan Water
District of Southern California (Metropolitan). The statutory relationships between these
agencies establish the District’s entitlements to receive imported water.
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. The District receives imported potable water from the
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
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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. In addition, DWR and the California Urban Water Conservation Council
(CUWCC) hosted a special workshop to review the requirements of the Act. At a separate
workshop, the Working Group received a briefing from Metropolitan on its regional plan,
and participants discussed strategies for coordination between the supply agencies. The
District participated in several workshops and meetings, providing water supply and
demand information as well as recycled water opportunities.
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 2005 UWMP. Prior to adoption, the District mailed the 2005 UWMP to
stakeholders including the Water Authority, the City of Chula Vista, the County of San
Diego, and the City of San Diego. The 2005 UWMP was presented at a Water Resources
Committee Meeting, and two notices were published in the San Diego Union-Tribune and
the East County Californian. A Public Hearing regarding the 2005 UWMP is expected to
be held on November 7, 2005. The District’s Board of Directors is currently planning to
adopt its final UWMP on December 7, 2005. The adoption resolution and the documents
related to public notification are included in Appendix H.
These coordination efforts are summarized in Table 1.
Table 1. Coordination with Appropriate Agencies
Participated
in UWMP
development
Commented
on the draft
Attended
public
meetings
Contacted
for
assistance
Received
copy of
draft
Sent notice
of intention
to adopt
San Diego
County
Water
Authority
X X X X
City of San
Diego
X X
City of
Chula Vista
X X
County of
San Diego
X X
1.2 Resource Maximization
The District’s commitment to maximizing resources is reflected in its mission statement,
which is,
to provide safe, reliable water and wastewater services to our community
with innovation, in a cost-efficient, water-wise and environmentally
responsible manner.
For many years, the District has worked to reduce its reliance on imported water, and in
particular 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
OTAY WATER DISTRICT 2005 URBAN WATER MANAGEMENT PLAN
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when water is unavailable from the Water Authority. The District and the Water Authority
formed a policy in 1976 to provide the District with treated water from the Helix Water
District when the District’s normal treated water supply is unavailable. A similar
arrangement made with the City of San Diego in 1999 provides the District access to
treated water from the City’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. These water sources are
further discussed in Section 2.3.
Water conservation is also an important component of the District’s commitment to
reducing reliance on imported water. In partnership with the Water Authority, the City of
Chula Vista, and developers, the District’s water conservation efforts are expected to grow
and expand. The District’s water savings through conservation are expected to be
approximately 5,400 acre-feet per year (AF/yr) by 2030, or approximately 7% of total
demand. The District is also committed to continuing investigations of local groundwater,
additional recycled water, desalination, and other potential water resources that could
further reduce the District’s reliance on imported water.
1.3 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
amend state law to improve the link between water supply planning and land use decisions
made by cites 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.
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2. Service Area, Demands, and Supplies
This section of the report provides an overview of the District’s service area, its current
water supply, measures to reduce water demand, and projections of future supply.
2.1 Appropriate Level of Planning
The District’s service area has experienced significant growth in the past five years, and the
service area population is expected to increase by an additional 100,000 people by 2030.
All of the District’s potable demands are currently met with imported water provided
through the Water Authority and Metropolitan. Much of the supply discussion in this
report is based on the supply planning performed by these regional agencies.
2.2 Service Area Description
The District is located in the southern half of 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 the San Diego County through its
membership in Metropolitan.
The service area is generally located within the south central portion of San Diego County
and includes approximately 137 square miles, of which 125.5 square miles are within the
District’s boundaries and 18 square miles are in the District’s Area of Influence. The
topography of the service area is diverse, consisting of a variety of valleys, hills,
mountains, lakes, and rivers. The area includes both urban and rural development. The
major transportation arteries serving the area include State Highway 94 in the north, and
Interstate 805 in the southwest.
The District serves portions of the communities in the southern El Cajon, La Mesa, Rancho
San Diego, Jamul, Spring Valley, Bonita, eastern Chula Vista, Eastlake and Otay Mesa
areas. The area within the District’s boundaries is roughly bounded on the north by the
Padre Dam Municipal Water District, on the northwest by the Helix Water District, and on
the west by the South Bay Irrigation District (Sweetwater Authority) and the City of San
Diego. The southern boundary of the District is the international border with Mexico.
The Area of Influence is to the east of the current service area and is bounded on the west
by the Upper and Lower Otay Reservoirs. It is comprised of portions of the Proctor Valley
Parcel and all of the San Ysidro Mountains Parcel of the Otay Ranch.
The service area is shown in Figure 1.
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Figure 1. Otay Water District Service Area
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The District’s service area population has grown from approximately 48,300 in 1980 to an
estimated 2005 population of 179,000. Data on the future rate of growth within the District
were obtained from the San Diego Association of Governments (SANDAG). SANDAG
serves as the regional, intergovernmental planning agency and provides estimates of
population and housing up to the year 2030. SANDAG has prepared forecasts of
population, housing and employment in each census tract in 2005, 2010, 2020, and 2030.
For this analysis, the District assumed that the population within each census tract was
uniformly distributed around the tract. The census tract data were intersected with the
District’s service area boundary using geographical information system (GIS) software.
Populations for 2015 and 2025 were linearly interpolated between the SANDAG estimates
for 2010, 2020, and 2030. The estimated service area population is shown in Table 2.
Table 2. Population – Current and Projected
2005 2010 2015 2020 2025 2030
Service Area Population 179,000 222,390 242,540 262,690 267,920 273,150
Compound Annual Growth Rate 4.5% 1.7% 1.6% 0.4% 0.4%
The District’s long-term historic growth rate has been 3%. In recent years, the growth has
occurred at a faster rate due to accelerated residential development in eastern Chula Vista.
The SANDAG forecast shows this accelerated growth to continue for another five to ten
years. The growth rate is expected to slow as the inventory of developable land is
diminished.
The District is aware of several potential changes that are not reflected in the population
projections in Table 2:
• The Proctor Valley Parcel, also known as Village 13 or the Resort Village, is located
east of Otay Lakes and is outside the District’s current service area. Plans for the
development of this parcel show medium to high-density residential dwellings units,
hotel, recreational facilities, commercial development, and parks. This area is expected
to be a near-term annexation to the District , to the Water Authority, and to
Metropolitan. The expected water demand for this development has been included in
the projections in this report, beginning with the year 2010.
• The City of Chula Vista may revise its General Plan to show increased density of
development. Preliminary indications are that this change will result in higher planned
densities of development, resulting in a potential for an additional 5,000 dwelling units
in the District’s service area. At the time of this report, the change has not been
finalized or approved. It has also not been incorporated by SANDAG into the regional
growth forecasts. This potential change is not reflected in the demand projections in
this report.
• A group of developers is working on a proposed change to the Community Plan that
would increase residential development in the Otay Mesa area, which would lead to
higher water demands than the development currently expected. The Otay Mesa
Coalition is holding workshops and working to obtain approval for the change to the
OTAY WATER DISTRICT 2005 URBAN WATER MANAGEMENT PLAN
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Community Plan. The Coalition has not published information that would allow the
District to estimate the impact on water demands, and the Coalition has not made the
information available for review. This potential change has not been reflected in
demand projections in this report.
The District provides water service to residential, commercial, industrial, and agricultural
customers, and for environmental and fire protection uses. In addition to providing water
throughout its service area, the District also provides sewage collection and treatment
services to a portion of its service area known as the Jamacha basin. The District also
operates the Ralph W. Chapman Water Recycling Facility (RWCWRF) with an effective
capacity of 1.1 million gallons per day (mgd).
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
in the period between December through March. Average annual rainfall is approximately
9.4 inches per year.
Historic climate data were obtained from the Western Regional Climate Center for Station
042706 (El Cajon). This station was selected 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
than the conditions in most of the District’s service area.
Evapotranspiration data were obtained from the California Irrigation Management
Information System (CIMIS). Because conditions in the service area vary from coastal
areas to inland areas, evapotranspiration data are reported for two stations: 147 (Otay
Lakes), and 153 (Escondido SPV). The evapotranspiration data for station 147 are based
on actual historical data since 1999, while the data for station 153 are based on the long-
term averages provided by CIMIS. Climate and evapotranspiration data are summarized in
Table 3.
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Table 3. Climate Data
Monthly Average Evapotranspiration (inches) El Cajon (042706) Month
Otay Lakes No. 147 Escondido SPV No. 153
Average
Rainfall
(inches)
Average
Temperature
(Fahrenheit)
January 2.28 2.81 2.55 55.9
February 2.64 2.76 2.74 57.1
March 3.92 3.78 2.45 59.3
April 4.66 5.31 0.80 63.0
May 5.68 6.10 0.14 66.4
June 5.81 6.97 0.09 70.0
July 6.25 7.08 0.09 75.0
August 6.08 6.83 0.02 76.5
September 4.74 5.67 0.17 74.2
October 3.65 4.15 0.61 68.1
November 2.45 3.31 1.33 60.1
December 2.15 2.56 1.28 55.3
Annual 50.32 57.33 12.27
The typical annual distribution for temperature and precipitation are shown in Figure 2.
Figure 2. Average Temperature and Precipitation
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2.3 Water Sources
This section discusses the water sources available to the District.
2.3.1 Potable Water
The District currently meets all its potable demands with imported treated water from the
Water Authority. The Water Authority, as a wholesale agency, imports both raw water and
treated water through separate pipelines for delivery to its member agencies in San Diego
County. The Water Authority’s current and future supply portfolio is discussed in Section
2.11.
The District’s primary source of potable supply is treated water delivered through the
Water Authority’s Pipeline No. 4. Pipeline No. 4 delivers potable water treated at
Metropolitan’s Skinner WTP in Riverside County. The Water Authority has multiple flow
control facilities (FCFs) on Pipeline No. 4 that feed into the District’s distribution system.
During normal operations, most of the District’s potable demand is met with water from
Pipeline No. 4. The District’s planning objective is to have sufficient capacity through
Pipeline No. 4 to meet ultimate demands.
The District has entered into arrangements with the Water Authority and neighboring water
agencies to provide potable water to their northern service area during periods when supply
from Pipeline No. 4 is unavailable. One of these arrangements is based on a 1976 policy
adopted by the Water Authority’s Board of Directors. As a result of accepting State Water
Project water into their system, the Water Authority’s Board of Directors adopted a policy
stating,
“the Authority will deliver treated water to its member agencies at all
service connections installed prior to December 1, 1975, upon request and
at an elevation equal to that now available.”
As a result of this policy, the Water Authority is obligated to provide the District with 8
mgd of treated water through a pipeline known as the La Mesa – Sweetwater Extension
(LMSE). While this policy is understood by both parties, it has never been formalized in a
written agreement.
One of the District’s neighboring agencies, the Helix Water District, owns and operates the
R. M. Levy WTP. The Water Authority has a formal agreement with the Helix Water
District for 8 mgd of capacity from the R. M. Levy WTP. This capacity was acquired by
the Water Authority on behalf of the District. Water from the R. M. Levy WTP is
conveyed to the District through the LMSE.
In April 1997 the Water Authority and the Helix Water District entered into an agreement,
known as the Capacity Agreement, that addressed transmission of untreated water and the
expansion of the R. M. Levy WTP. In December 1999 the Water Authority and the Helix
Water District entered into another agreement knows as the Flume Agreement. The Flume
Agreement addressed the facilities need to convey treated water from the R. M Levy WTP
to the LMSE and eventually to the District. The Capacity Agreement and the Flume
OTAY WATER DISTRICT 2005 URBAN WATER MANAGEMENT PLAN
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Agreement provide the framework for the Water Authority to comply with its policy of
providing 8 mgd to the District (4 mgd at Otay 8 FCF and 4 mgd at Otay 14 FCF).
The policies and arrangements described above allow the District to receive 8 mgd of
treated water. Negotiations are currently ongoing to increase this amount to an average of
12 mgd and a peak of 16 mgd. This agreement is anticipated to be finalized in November
2006 and, if available, will be included in Appendix B.
The District also has an agreement with the City of San Diego, which owns and operates
the Otay WTP. The District entered into an agreement on January 11, 1999 with San
Diego that provides the District with 10 mgd of capacity from the Otay WTP. The Otay
WTP existing rated capacity is 40 mgd, with an actual effective capacity of approximately
34 mgd. The City’s typical demand for treated water from the Otay WTP is approximately
20 mgd. The City’s obligation to supply treated water under this agreement is contingent
upon the availability of 10 mgd of surplus treated water, until the District pays for
expansion of the Otay WTP. The Otay WTP may treat either imported raw water from the
Water Authority’s Pipeline No. 3 or local surface water stored in Lower Otay Reservoir. A
trailer-mounted engine-driven pumping unit at the Otay WTP has the capability to pump 6
to 20 mgd into the District’s service area. The agreement with the City of San Diego for
potable water from the Otay WTP is included in Appendix C.
2.3.2 Recycled Supply
The District owns and operates the Ralph W. Chapman Water Recycling Facility
(RWCWRF), which supplies approximately 1,230 AF/yr of recycled water. The District
has entered into an agreement with the City of San Diego to purchase additional recycled
water from the City’s South Bay Water Reclamation Plant (SBWRP). The agreement with
the City for water from the SBWRP is included in Appendix D. This agreement will
provide an additional 6 mgd (or more if available) of recycled water to the District, or
approximately 6,700 AF/yr. More information about the District’s recycled water planning
is included in Section 5.
The District’s current and planned supplies are shown in Table 4.
Table 4. Current and Planned Water Supplies – AF/yr
Water Supply Sources FY 2005 FY 2010 FY 2015 FY 2020 FY 2025 FY 2030
San Diego County Water
Authority
37,618 45,772 52,349 59,799 66,560 75,108
Recycled Water 1,155 4,040 4,684 5,430 6,294 7,297
Total 38,773 49,812 57,033 65,229 72,854 82,405
In 2005, the RWCWRF produced 1,155 AF/yr of recycled water, slightly less than its full
capacity. In addition, the District used potable water to supplement the recycled water
system in areas where insufficient recycled water was available. The District’s estimated
demand for recycled water in 2005 was 3,485 AF.
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2.3.3 Groundwater
The supply forecasts contained within this Plan do not consider local groundwater
development as a supply resource. Although groundwater supplies are less plentiful in the
San Diego region than in some other areas of southern California, sufficient undeveloped
supplies may exist to help meet a portion of the region’s future water needs. In the past,
the District has studied numerous groundwater options with mixed results.
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. Additionally, irrigation
with saline imported water and over-pumping has led to excessive salinity in many of the
most promising basins. Outside of these alluvial basins, much of the geology consists of
fractured crystalline bedrock and fine-grained sedimentary deposits that are generally
capable of yielding only small amounts of groundwater to domestic wells.
One groundwater opportunity of particular interest to the District and other agencies is the
San Diego Formation, which reportedly lies within and/or adjacent to the District’s
westerly boundary and runs along the coast from South San Diego to the international
border. The District will consider new opportunities to collaborate with neighboring
agencies to investigate the potential of the San Diego Formation in the future.
2.4 Reliability of Supply
The Act states that every urban water supplier shall include, as part of its plan, an
assessment of the reliability of its water supplies. The water supply and demand
assessment must compare the total projected water use with the expected water supply over
the next 25 years in 5-year increments. This reliability assessment is required for normal,
single dry-year and multiple dry water years.
The District currently obtains 100% of its potable water supply as imported water from the
Water Authority. The Water Authority, in turn, obtains imported water from Metropolitan,
who has prepared a regional UWMP. The reliability of the District’s potable supply is
dependent on these wholesale agencies.
Metropolitan’s 2005 UWMP includes a discussion of supply reliability. Metropolitan used
a computer model to evaluate 70 years of historic hydrology and develop estimates of
water surplus or shortage. The driest year on record was 1977, and the driest three-year
period was 1990-92. The analysis determined that Metropolitan could maintain reliable
supplies during normal or dry-year conditions if they re-occurred during the period 2005
through 2025. The analysis included new supplies under development as part of
Metropolitan’s Integrated Resources Plan (IRP), updated in 2003.
The Water Authority’s 2005 UWMP also includes a discussion of supply reliability. The
Water Authority will continue to rely on Metropolitan to help meet water demands. The
Water Authority is also developing its own supplies, as discussed in Section 2.11. The
Water Authority prepared an assessment of its supply reliability during a normal year
OTAY WATER DISTRICT 2005 URBAN WATER MANAGEMENT PLAN
12 10/7/2005
hydrology, a dry year hydrology (1991), and multiple dry years (1990-92). The Water
Authority’s analysis showed that it would meet demands under all these conditions through
the year 2030.
The District works closely with the Water Authority and Metropolitan in future supply
planning. These agencies have determined that they will be able to meet their projected
demands through 2030, which include potable water demands for the District. The District
has concluded that these wholesale agencies will be able to provide water to meet the
District’s projected demands. Tables are included in Section 7 of this report that show
projected demand and supply during normal years, dry years, and multiple dry years. The
projected supply in these tables is equal to the project demand, based on the information
provided by the Water Authority and Metropolitan. If the District’s future demands are
slightly more or less than currently projected, it is anticipated that the supply portfolio
maintained by the Water Authority and Metropolitan will be flexible enough to continue to
meet the District’s demands.
Recycled water demands are to be met with recycled water from the District’s RWCWRF
and the City of San Diego’s SBWRP. During dry periods, many conservation measures are
focussed on reducing outdoor water use, which does not contribute to wastewater flow. In
addition, because both of these plants are stripping plants, the recycled water output is
limited by the treatment capacity and not by the supply of raw wastewater. Therefore, the
District’s recycled supply is not expected to be subject to reduction during dry periods.
2.5 Transfer or Exchange Opportunities
The District currently has arrangements to receive water from the Water Authority (through
the Helix Water District) and the City of San Diego in times when its normal treated supply
from Pipeline No. 4 is limited or curtailed. These connections are for use during
emergencies or during planned interruptions in the supply of treated water from Pipeline
No. 4. The water provided by these agencies, in most cases, will still be imported water
from the Water Authority. At the wholesaler level, the Water Authority has engaged in a
transfer with the Imperial Irrigation District (IID). Under this agreement, water conserved
by IID will be transported by Metropolitan through the Colorado River Aqueduct and
delivered to the Water Authority. Further information about this agreement can be found in
the Water Authority’s UWMP.
2.6 Water Use by Type for Past, Current and Future Deliveries
The District maintains records of its water consumption and its number of customers by
customer type. The number of customers in each customer type is available as of the end
of FY 2005. Because of limitations in the billing database, the most recent available data
for water consumption by customer type are for the end of FY 2004. However, the total
consumption for all customers for FY 2005 was known. The breakdown of consumption
between customer types in FY 2005 was assumed to be the same as it was in FY 2004.
These data are summarized in Table 5.
OTAY WATER DISTRICT 2005 URBAN WATER MANAGEMENT PLAN
13 10/7/2005
Table 5. Current Water Use and Customers by Customer Type
Customer Class FY 2005
Customers
Percent of
Customers
FY 2004
Actual
Consumption
(AF)
Percent of
Consumption
FY 2005
Actual
Consumption
(AF)
Single-family residential 42,033 90% 20,113 52% 19,840
Multi-family residential 758 2% 2,931 8% 2,891
Commercial / Industrial 1,092 2% 1,570 4% 1,549
Institutional 225 < 1% 2,143 6% 2,114
Irrigation 1,621 3% 8,643 23% 8,526
Other 805 2% 2,298 6% 2,267
Unaccounted for 0 0% 517 1% 510
Total 46,534 38,215 37,697
Table 5 includes a value for “Unaccounted-for” water. The District has meters for all its
customers. Whenever possible, the District also estimates the water lost to any known un-
metered events. For example, water used for construction does not fall into any of other
the billing categories, but the District does attempt to quantify this water use.
The consumption in Table 5 does not equal the total amount of potable and recycled water
that the District purchased and produced. In FY 2005, the District’s total water purchased
and produced was 38,773 AF. The difference is system losses, which in FY 2005 were
1,076 AF, or approximately 3 percent of total water use. System losses include water used
for storage, flushing, fire-fighting, and minor leaks in the distribution system.
Approximately 90% 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. The
relative composition of the District’s customers is expected to remain consistent. The other
customer sectors, such as commercial, industrial, and institutional, are expected to grow at
the same rate to support the residential development.
The Water Authority has used its CWA-MAIN model to prepare projections of future water
use within the District’s service area. The CWA-MAIN model uses input data for
population, demographics, climate, economic forecasts, and other variables to estimate
future water use. The jurisdictional boundaries of the Water Authority, Metropolitan, and
the District do not coincide perfectly in some areas. However, the District has elected to
use these forecasts of future water use to maintain consistency with planning work by the
Water Authority.
The Water Authority prepared two separate demand estimates for the District: one that
includes only the currently served areas, and one that includes the potential near-term
annexations of Village 13 and Peaceful Valley Ranch. Based on input from the developers
of these areas, the District and the Water Authority have estimated an annual demand of
2,012 AF for these near-term annexations. The District has included this additional
demand in its projections. The additional 2,012 demand is expected to phase in between
2005 and 2010.
In preparing this document, the District has attempted to maintain consistency with the
reporting format in the DWR guidance manual for UWMPs. The DWR methodology is
OTAY WATER DISTRICT 2005 URBAN WATER MANAGEMENT PLAN
14 10/7/2005
based on treating water conservation as a supply of water. The District is committed to
water conservation, as discussed in Section 2.7. In cooperation with the Water Authority,
the District has estimated the current and future water savings resulting from its
conservation programs. In order to present consistent data, the water savings due to
conservation must be considered separately when estimating water consumption. The
District has estimated its water consumption by customer type, assuming conservation is
not in place. Conservation savings are then subtracted to yield a total estimate for future
water use.
The District’s projected water consumption (excluding conservation) are shown in Table 6.
The water volumes in Table 6 do not coincide with other tables in this report that show
total water use. The numbers in Table 6 are theoretical demands that do not include the
impact of conservation or system losses.
Table 6. Water Consumption Excluding Conservation and Losses – AF/yr
FY 2000 FY 2005 FY 2010 FY 2015 FY 2020 FY 2025 FY 2030
Single-family Residential 15,737 21,054 27,618 31,513 35,872 39,931 44,926
Multi-family Residential 2,039 3,068 4,025 4,593 5,228 5,819 6,547
Commercial / Industrial 3,124 1,643 2,156 2,460 2,800 3,117 3,507
Institutional / Government 2,143 2,243 2,943 3,358 3,822 4,255 4,787
Landscape 6,425 9,028 11,843 13,513 15,382 17,123 19,265
Agriculture 176 2,405 3,155 3,600 4,099 4,562 5,133
Other / Unaccounted for 0 542 710 811 923 1,027 1,156
Total 29,643 39,984 52,450 59,848 68,126 75,833 85,320
The District’s estimated growth in number of customers is shown in Table 7.
Table 7. Estimated Growth in Customers Served
2000 2005 2010 2015 2020 2025 2030
Single-family 32,448 42,033 54,000 61,828 70,713 78,980 89,334
Multi-family 695 758 974 1,115 1,275 1,424 1,611
Commercial / Industrial 1,084 1,092 1,403 1,606 1,837 2,052 2,321
Institutional / Government 190 225 289 331 379 423 478
Landscape 1,060 1,621 2,083 2,384 2,727 3,046 3,445
Agriculture 40 805 1,034 1,184 1,354 1,513 1,711
Other / Unaccounted for 353 0 0 0 0 0 0
Total 35,870 46,534 59,783 68,449 78,286 87,437 98,900
Two components of water use are not included in Table 6: water conservation and system
losses. System losses are different than the unaccounted-for water in Table 6. While the
unaccounted-for water is attributed by the District to certain events or locations, system
losses are assumed to occur system-wide. Based on data for FY 2005, system losses for
future years were estimated to be 3% of total water use.
Estimates of the District’s savings due to conservation were prepared in cooperation with
the Water Authority. For the past 15 years, the District has maintained records of water
conserved through active conservation measures such as plumbing retrofits and incentives
for toilet replacement. The District’s history of water conservation through active
measures is detailed in Section 2.7. The Water Authority has recently begun estimating
additional water savings from passive measures, such as efficiency standards for new
OTAY WATER DISTRICT 2005 URBAN WATER MANAGEMENT PLAN
15 10/7/2005
construction. For 2005, the District’s estimated savings are 1,087 AF from active measures
and an additional 1,200 AF from passive measures for a total of 2,287 AF. In order to
maintain consistency with Water Authority calculations, the District has included passive
measures in its overall conservation estimate from 2005 onward. The historic numbers
from 1990 through 2005 are based on active measures only. The future projections from
2005 through 2030 are based on active and passive measures.
Projected values for losses and conservation are shown in Table 8.
Table 8. Additional Water Uses and Losses – AF/yr
Water Use FY 2000 FY 2005 FY 2010 FY 2015 FY 2020 FY 2025 FY 2030
Recycled Included in Table 6
Conservation -765 -2,287 -4,132 -4,526 -4,854 -5,165 -5,387
System losses 1,733 1,076 1,494 1,711 1,957 2,186 2,472
Total 968 -1,211 -2,638 -2,815 -2,897 -2,979 -2,915
As discussed above, the conservation estimate of 765 AF for 2000 is based on active
measures only. The conservation estimates beginning in 2005 include passive savings.
The District does not sell any water to other agencies. The sum of its water use is shown in
Table 9.
Table 9. Total Water Use – AF/yr
Water Use FY 2000 FY 2005 FY 2010 FY 2015 FY 2020 FY 2025 FY 2030
Sum of water
consumption by customer
category and additional
water uses and losses
30,611 38,773 49,812 57,033 65,229 72,854 82,405
2.7 Demand Management Measures
Water conservation is a critical part of the District’s 2005 UWMP and its long-term
strategy for meeting the water needs of the District. The goals of the District’s water
conservation program are to:
• reduce the demand for more expensive, imported water
• demonstrate continued commitment to the Best Management Practices (BMPs)
• ensure a reliable water supply
The District is a signatory to the Memorandum of Understanding (MOU) Regarding Urban
Water Conservation in California, which created the California Urban Water Conservation
Council (CUWCC) in 1991. As a signatory, the District is required to submit biannual
reports that detail the implementation of current water conservation practices. The District
voluntarily agreed to implement the fourteen water conservation BMPs beginning in 1992.
The District submits its annual report to the CUWCC every two years. The District’s BMP
Reports for 2001 to 2004, as well as the BMP Coverage Report for 2003-04, are included
in Appendix E.
OTAY WATER DISTRICT 2005 URBAN WATER MANAGEMENT PLAN
16 10/7/2005
As a water retailer, the District reports on 13 BMPs of the 14 BMPs (BMP 10 applies only
to wholesale agencies). In addition to the BMPs, the District also reports on the number of
accounts by customer class and details its supply sources. Table 10 provides an overview
of the progress of the District’s compliance with the BMPs as required by the CUWCC.
OTAY WATER DISTRICT 2005 URBAN WATER MANAGEMENT PLAN
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Table 10. Best Management Practices for Urban Water Conservation in California
BMP Description Conservation Programs Compliance
1
Water Survey Programs for Single-
Family and Multi-Family
Residential Customers
Residential Survey Program No
2 Residential Plumbing Retrofit Showerhead Distribution Yes
3 System Water Audits, Leak
Detection and Repair Distribution System Auditing Program Yes
4
Metering with Commodity rates for
all New Connections and Retrofit of
Existing
Metered By Type Yes
5 Large Landscape Conservation
Programs and Incentives
Agriculture Water Management
Program
Professional Assistance for Landscape
Management (PALM)
Protector Del Agua
Commercial Landscape Incentive
Program (CLIP)
Yes
6 High-Efficiency Washing Machine
Rebate Programs
Residential High-Efficiency Clothes
Washer (HEW) Program Yes
7
Public Information Programs
Water Conservation Garden
Pipeline and Communiqué Newsletters
Special Events
Website
Yes
8
School Education Programs
Classroom Presentations
Tours of WTP
Video Library
Awards Programs
Grants for School-site Gardens
Yes
9 Conservation Programs for
Commercial/Industrial/Institutional
(CII) Accounts
CII Voucher Program No
10 Wholesale Agency Assistance
Programs N/A N/A
11 Conservation Pricing By Ordinance Yes
12
Conservation Coordinator
Full-time Coordinator
Full-time Water Conservation
Specialist
Yes
13 Water Waste Prohibition By Ordinance Yes
14 Residential Ultra Low Flow Toilet
(ULFT) Replacement
Residential ULFT Voucher and Rebate
Program Yes
The District is in compliance for 11 of the 13 BMPs on which it reports. The two BMPs
not in compliance (1 and 9) are discussed in Section 2.8.
It should be noted that the Annual Report prepared by the CUWCC shows the District not
in compliance with BMP 5. However, the CUWCC has determined that the District’s
program is “At Least As Effective As” the original BMP requirements. In addition, the
CUWCC reports currently show the District out of compliance with BMP 13, which deals
OTAY WATER DISTRICT 2005 URBAN WATER MANAGEMENT PLAN
18 10/7/2005
with prohibitions against water waste. The District has adopted ordinances to prohibit the
following uses of water:
• Gutter flooding
• Single-pass cooling systems
• Single-pass car wash
• Single-pass foundations
• Other water waste
The District has prepared a new draft Section 39 of its Code of Ordinance. This new draft
includes the prohibition of new commercial single-pass laundry operations. It is believed
that adding this prohibition will bring the District into full compliance on BMP 13.
Water conservation programs are 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. Education is an important component to all
of these programs. As a member agency of the Water Authority, the District also
participates in many water conservation programs designed and conducted as a shared-cost
participation program among the member agencies, the Water Authority and Metropolitan.
The district participates in a Joint Powers Authority with the Helix Water District,
Grossmont-Cuyamaca Community College District, the San Diego County Water
Authority, the City of San Diego, and the Padre Dam Municipal Water District to operate
the 4.2-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.” The Garden educates
customers about reducing landscape water use through the use of water-efficient
landscapes.
Recent accomplishments of the District’s conservation programs include:
1. Replaced 24,000 square feet of turfgrass through the pilot Cash for Plants landscape
retrofit program
2. Saved over 1,087 acre-feet in FY 2005, an 12% increase in water savings from the
previous year
3. Over 80,000 students have participated in the District’s school programs to date
The total water savings from the District’s conservation programs is shown in Figure 3.
From 1990 through 2005, these programs have saved approximately 8,500 AF of water.
OTAY WATER DISTRICT 2005 URBAN WATER MANAGEMENT PLAN
19 10/7/2005
0
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19
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Co
n
s
e
r
v
a
t
i
o
n
S
a
v
i
n
g
s
(
A
F
)
Figure 3. District Conservation Programs Annual Water Savings
The data in Figure 3 are based on active measures only, as discussed in Section 2.6.
Beginning in 2005 and moving forward, the District will estimate conservation savings
from both active and passive measures. Incentive programs that result in the replacement
of less efficient toilets, showerheads, clothes washers and irrigation controllers are typically
considered active measures. Passive measures include code compliance in new
construction, ULFT natural replacement, and commercial HEW natural replacement.
The District continues to promote water conservation at a variety of events, including those
involving developers in its service area. In addition, District staff partners with the Water
Authority to promote new technologies and incentives for new technologies such as dual-
flush toilets in new residential construction and weather-based irrigation controllers.
For FY 2005, the District saved approximately 1,087 acre-feet of water, which is enough to
meet the annual needs of 2,174 homes for one year. Listed below are the current programs
being implemented by the District:
• Cash for Plants Landscape Retrofit Program
• Signage Grant Received to Highlight Waterwise Model Homes
• Water Conservation Programs for New Homes
• Outreach Efforts to Otay Customers
• Commercial Water Conservation Programs
• Large Landscape Programs
• Residential ULFT Program-$75 and $95 Vouchers
• Residential High Efficiency Clothes Washer Program
• School Education Program
• Residential Weather-Based Irrigation Controller (WBIC) Incentive Program
OTAY WATER DISTRICT 2005 URBAN WATER MANAGEMENT PLAN
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The District remains on schedule to expand its current recycled water system over the next
two years, and continues to actively promote water conservation programs to its customers.
The District promotes its new and existing conservation programs through expanded
outreach efforts, bill inserts, articles in the District’s Pipeline newsletter, direct mailings to
District customers, and through the Water Authority’s marketing efforts. The District is
committed to water conservation and recycling as reflected in its Strategic Plan, and
expects to spend more effort and resources in the future to promote programs that improve
landscape water efficiency.
2.8 Evaluation of Demand Management Measures not Implemented
The District is not in compliance with CUWCC criteria for two BMPs: 1 and 9.
BMP 1 calls for water survey programs for single-family and multi-family residential
customers. The District implemented a program to market the surveys to both single-
family and multi-family residences in 1991. The District has extended residential survey
offers to 100% of the estimated residences in the service area. The only area where the
District does not comply is in the number of completed surveys. The District has
completed surveys for approximately 4% of its residential customers, while the coverage
requirement calls for surveys to be completed for 7.9% of residential customers. The
District is committed to continuing to market and perform water survey programs, but it is
not feasible to complete enough surveys to meet the requirements of this BMP. According
to the CUWCC, approximately 14% of reporting agencies are in compliance with this
BMP.
BMP 9 deals with conservation programs for commercial, industrial, and institutional
accounts. The District has identified and ranked by use its commercial, industrial, and
institutional accounts. There are multiple potential tracks for compliance with this BMP,
one based on surveys and one based on incentives for water savings. The Water Authority
has elected to pursue compliance through the use of incentives for water savings. The
Water Authority currently manages a Voucher Incentive Program (VIP) to encourage the
use of water-efficient equipment by commercial, industrial, and institutional customers.
The District has participated in this program, but the District has a relatively small base of
commercial and industrial customers. In recent years, the District has increased the water
savings achieved through this program. However, the savings are not currently high
enough to bring the District into full compliance with this BMP. The District will continue
to participate in this program with the Water Authority.
2.9 Planned Water Supply Projects and Programs
The District’s 2002 Water Resources Master Plan identified a number of capital
improvement program projects to the potable and recycled water distribution systems.
These pipelines, pump stations, and storage reservoirs improve the District’s ability to
reliably deliver water to all its customers. Each year, the District updates its Capital
Improvement Program to ensure that projects are completed in time to meet the needs of
customers. While these distribution projects enhance the District’s ability to supply water,
OTAY WATER DISTRICT 2005 URBAN WATER MANAGEMENT PLAN
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they do not represent a new source of water. The District will continue to rely on the Water
Authority to provide treated potable water.
For the recycled system, the City of San Diego’s SBWRP constitutes a new source. The
plant is currently operating and producing recycled water. The District is completing the
conveyance infrastructure to transport the water from the City’s delivery point to the
District’s recycled water service area. This project is under construction and is expected to
be complete by the first quarter of 2007.
The SBWRP has an existing capacity of 15 mgd. It draws raw wastewater from a trunk
sewer leading to the Point Loma treatment plant. During dry years, it is expected that there
would continue to be adequate raw wastewater to meet demands for recycled water.
Therefore, the District’s supply of recycled water from SBWRP is not expected to decrease
during dry years.
This project is summarized in Table 11.
Table 11. Future Water Supply Projects
Multiple Dry Year AF to
District
Project Name Normal-year
AF to District
Single Dry Year
AF to District
Year 1 Year 2 Year 3
Pipeline and tank
connecting to SBWRP
6,700 6,700 6,700 6,700 6,700
2.10 Desalination
The District is committed to participating in regional efforts to develop desalinated ocean
water as a new supply. Because the District’s service area does not include any coastal
areas, any ocean desalination project would likely be a joint project with neighboring
agencies and/or the Water Authority. The Water Authority has planned its first
desalination plant at the Encina Power Plant in Carlsbad. The Water Authority has also
conducted studies of other potential sites for desalination.
The Water Authority, in coordination with Mexico, completed a South County / Tijuana
Region Seawater Desalination Feasibility Study in 2005. That study considered six sites in
Mexico and eight sites in the United States. The United States sites were located near the
South Bay Power Plant and the International Boundary and Water Commission wastewater
treatment plant. In Mexico, the selected sites were near the Rosarito Power Plant and the
La Mision Beach Well site. At each site, scenarios were evaluated that included domestic
water delivery or domestic and cross-border water delivery.
The 2005 study determined that desalination would be technically feasible in the South
County and Mexico border region. The study did find uncertainties in the viability of
intake and discharge infrastructure, particularly for the United States sites. That study also
found that based on the projected growth in demands in the South County, a desalination
OTAY WATER DISTRICT 2005 URBAN WATER MANAGEMENT PLAN
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facility would not be cost-effective until 2018 at the earliest. The District will continue
working with the Water Authority and Mexico to monitor changes in desalination
technology and evaluate the potential for regional projects.
The desalination of brackish groundwater may represent a potential new supply. The
District’s on-going investigation of groundwater potential is discussed in Section 2.3.3.
2.11 Wholesale Water
The Water Authority is the wholesale water supplier to the District. The Water Authority
is a member agency of Metropolitan and is responsible for obtaining imported water from
Metropolitan. Metropolitan has two primary sources of imported water: the State Water
Project (SWP), which transports water from the Sacramento-San Joaquin Delta in northern
California, and the Colorado River Aqueduct, which transports water from the Colorado
River behind Parker Dam.
The Water Authority is also developing its own sources of water to reduce its reliance on
Metropolitan. A series of agreements between the Water Authority, Metropolitan, the IID,
and several other parties was finalized in 2003. Known as the Quantification Settlement
Agreements (QSA), these agreements allow the Water Authority to receive up to 200,000
AF/yr of water from IID. The agreements also provide the Water Authority with up to
77,700 AF/yr that will be saved as a result of lining the All-American and Coachella
Canals. The Coachella Canal lining project is expected to be complete by early 2007,
while lining of the All-American Canal is expected to be complete by 2008. The Water
Authority is also planning an ocean desalination plant in Carlsbad that is expected to
provide 56,000 AF/yr by 2015. Each of these projects is expected to produce a “drought-
proof” supply that will not be reduced during dry years. The Water Authority’s 2005
UWMP provides additional information about these projects. The Water Authority is
expected to continue to provide water to meet the District’s potable demands through 2030.
The projected demand for imported treated water from the Water Authority is shown in
Table 12. These demands are based on the projections prepared by the Water Authority
using the CWA-MAIN model, including the expected demand from the Resort Village.
The demands in Table 12 do not include irrigation demands that the District expects to
meet using recycled water.
Table 12. Agency Demand Projections Provided to Wholesale Supplier – AF/yr
Wholesaler FY 2010 FY 2015 FY 2020 FY 2025 FY 2030
San Diego County Water Authority 45,772 52,349 59,799 66,560 75,108
The Water Authority will continue to import water from Metropolitan, while developing
the independent supplies discussed above. The Water Authority’s projected water supplies
are detailed in the Water Authority’s 2005 UWMP. The supply estimates from that report
are summarized in Table 13. The supply estimates in Table 13 are for the Water Authority
as a whole, not just for the District. However, they show the range of planned supplies in
the Water Authority’s UWMP that could be available to the District.
OTAY WATER DISTRICT 2005 URBAN WATER MANAGEMENT PLAN
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Table 13. Wholesaler Sources of Water Potentially Available to District – AF/yr
2010 2015 2020 2025 2030
Exist. Plan Exist. Plan Exist. Plan Exist. Plan Exist. Plan
Desalination - - - 56,000 - 56,000 - 56,000 - 56,000
IDD
Transfer
70,000 - 100,000 - 190,000 - 200,000 - 200,000 -
AAC & CC
lining
77,700 77,700 77,700 77,700 77,700
Metropolitan 445,845 378,417 311,368 324,750 357,507
A more detailed discussion of these supplies can be found in the Water Authority’s 2005
UWMP.
OTAY WATER DISTRICT 2005 URBAN WATER MANAGEMENT PLAN
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3. Determination of DMM Implementation
The District is a member of the California Urban Water Conservation Council and a
signatory to the Memorandum of Understanding. The District’s 2001 to 2004 BMP
Activity Reports and the District’s 2003-04 Annual BMP Coverage Report are included in
Appendix E. The CUWCC database has not yet been updated to produce a 2005 Annual
Report.
OTAY WATER DISTRICT 2005 URBAN WATER MANAGEMENT PLAN
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4. Water Shortage Contingency Plan
4.1 Stages of Action
The Act requires that urban water agencies conduct a water shortage contingency analysis
as part of their 2005 UWMP. As a member agency of the Water Authority, the District is a
participant in the Water Authority’s shortage contingency analysis, which addresses a
catastrophic shortage situation and drought management. Table 14 shows the water supply
stages the District has recognized in its draft Code of Ordinances Section 39. A draft
version of this ordinance section is included in Appendix F.
Table 14 Water Supply Shortage Stages and Conditions
Stage No. Water Supply Conditions % Shortage
I A temporary general water supply shortage due to increased demand or
limited supplies such as a disruption to the potable water treatment,
distribution or storage facilities of Metropolitan or the Water Authority,
or of other agencies whereby such systems become inadequate to meet
local or regional demand.
II A long-term scheduled or unscheduled shutdown, major system
disruption, or multi-year drought.
15%, 25%,50%
III A major unscheduled shutdown or disruption to the treated or untreated
water systems such as those caused by natural disaster, major system
failure, or acts of war.
50%
4.2 Estimate of Minimum Supply for Next Three Years
The Act requires an estimate of the minimum supply available during the next three years
(2006 – 2008). It is suggested that the estimate be based on the driest three-year historic
sequence for the water supply. The District’s supply of potable water comes from the
Colorado River basin and the State Water Project, through Metropolitan and the Water
Authority. Since the 1987-1992 drought, Metropolitan has sought to diversify its supply
and reduce its vulnerability to drought. Metropolitan’s IRP outlines projects such as
increased storage, groundwater storage, financial incentives for local projects and
conservation, and long-term water transfers that provide Metropolitan with supply during
dry years on the Colorado River and the State Water Project. Implementation of
Metropolitan’s IRP is expected to provide sufficient water to its member agencies even
during dry years.
The District’s recycled supply is currently provided by the RWCWRF. This plant has an
effective capacity of approximately 1.1 mgd; raw wastewater flows that exceed the plant’s
capacity are sent downstream to the San Diego Metropolitan Wastewater Department
(MWWD) for treatment. During a drought event, reduced water consumption could lead to
reduced raw wastewater flows. However, much of the reduction in water use is expected to
OTAY WATER DISTRICT 2005 URBAN WATER MANAGEMENT PLAN
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come through a reduction in outdoor use, which should not impact wastewater flows. The
supply of recycled water is considered to remain constant during multiple dry years.
The estimated minimum supply is shown in Table 15.
Table 15 Three-Year Estimated Minimum Water Supply – AF/Year
Source FY 2006 FY 2007 FY 2008 Normal (2005)
Water Authority 42,619 44,982 44,535 37,618
Recycled - RWCWRF 1,230 1,230 1,230 1,155
Recycled – SBWRP 0 0 2,810 0
Total 43,849 46,212 48,574 38,773
4.3 Catastrophic Supply Interruption Plan
Catastrophic events such as earthquakes or regional power outages can impact water
supply. As a member agency of the Water Authority, the District is a participant in the
Water Authority’s Emergency Response Plan (ERP) and Emergency Storage Project (ESP).
The ERP provides information to allow staff to respond to an emergency that impedes the
Water Authority’s ability to provide reliable water service to the District. The ERP
includes:
• Authorities, policies, and procedures associated with emergency response activities;
• Emergency Operations Center activities, including activation and deactivation
guidelines;
• Multi-agency and multi-jurisdictional coordination, particularly between the Water
Authority, its member agencies (including the District), and Metropolitan;
• Emergency staff, management, and organization required to assist in mitigating any
significant emergency or disaster;
• Mutual Aid agreements and covenants that outline the terms and conditions under
which mutual aid assistance will be provided; and
• Pre-emergency planning and emergency operations procedures.
The ESP is a system of reservoirs, pipelines, and other facilities that will work together to
store and move water around the county in the event of a natural disaster. The entire
project is expected to be completed by 2012. When completed, the ESP will provide
90,100 acre-feet of storage water for emergency purposes in the Water Authority’s service
area. This amount is anticipated to meet the Water Authority’s needs through at least 2030.
The District has constructed storage reservoirs to provide water during an interruption in
the Water Authority’s supply to the District. These reservoirs provide approximately 190
million gallons of storage, equal to approximately five days of average demand. The
District has also established emergency interconnections with neighboring agencies to
OTAY WATER DISTRICT 2005 URBAN WATER MANAGEMENT PLAN
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provide water during an emergency. The District has planned for potable water availability
from the City of San Diego Otay WTP (10 mgd) and the Water Authority through the
R. M. Levy WTP (currently 8 mgd and proposed 16 mgd). See Section 2.3 for details on
these two water sources.
The District has also established minor emergency interconnections with neighboring water
agencies for use during short-term outages. The District has five minor interconnections
with Helix Water District, three with Sweetwater Authority, and five with the City of San
Diego. These minor interconnections are intended primarily for short-term repairs or
emergencies. During an extended outage or drought, these neighboring agencies may not
have sufficient supply at these minor interconnections to share significant amounts with the
District.
4.4 Prohibitions, Penalties and Consumption Reduction Methods
The District has established prohibitions that become effective during different stages of
water shortage. For the complete Otay Code of Ordinance, Section 39, see Appendix F.
The mandatory prohibitions are shown in Table 16.
Table 16. Mandatory Prohibitions
Prohibitions Stage When Prohibition
Becomes Mandatory
Allowing water to leave a customer’s property by drainage onto adjacent
property due to excessive irrigation, poor design and/or neglect
At all times
Not repairing leaks within 48 hours At all times
Washing down paved areas, except to alleviate immediate safety or sanitation
hazards
At all times
Lawn watering or irrigation during daylight II (25%)
Use of hand-held hose without automatic shut-off nozzle II (25%)
Use of potable water for commercial street cleaning II (25%)
Filling of swimming pools, ponds or lakes II (50%)
Operation of non-residential fountains II (50%)
Residential car washing II (50%)
All outdoor irrigation III
In addition to the prohibitions above, the District has identified a number of methods to
reduce water consumption during a drought. These methods have been grouped into
categories intended to reduce demands 15%, 25%, and 50%. These methods are
summarized in Table 17.
OTAY WATER DISTRICT 2005 URBAN WATER MANAGEMENT PLAN
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Table 17. Consumption Reduction Methods
Consumption Reduction Method Stage When
Method Takes
Effect
Projected
Reduction
Ask large irrigation customers to reduce usage. II
Require a 20-foot clearance for construction near water lines (will
reduce losses due to accidental line breaks)
II
Reduce or suspend deliveries to Mexico II
Require Interim Agricultural Water Program customers to reduce their
usage by up to 30%
II
15%
Notify customers of need for additional conservation II
Enforce water conservation and use restrictions II
Consider mandating water budgets for large landscape accounts II
25%
Coordinate with Metropolitan and the Water Authority to issue press
notification to the media
II
Ask customers to reduce irrigation II
Establish reduction targets for commercial landscape accounts II
Reduce or suspend augmentation of the recycled water distribution
system with potable water
II
Consider mandating water budgets for all customers II
Consider reassigning personnel to enforce water use regulations II
Suspend all water use from temporary meters II
50%
The District may impose surcharges or other penalties for noncompliance with the
requirements or prohibitions in accordance with Section 39 of its Code of Ordinance.
These penalties are summarized in Table 18.
Table 18. Penalties and Charges
Penalty Situation when Penalty May Take Effect
Written letter of warning to the customer 1st Violation of Section 39
Notice of Violation 2nd Violation of Section 39 within a 12-month period
$100 surcharge 3rd Violation of Section 39 within a 12-month period
$200 surcharge 4th Violation of Section 39 within a 12-month period
$400 surcharge Any subsequent violation within a 12-month period
Temporarily deactivate recycled or potable water
meter
At any time if a customer is in violation of Section 39
Temporary installation of a flow restrictor, or
temporary deactivation of a meter
2nd Violation of Section 39 within a 12-month period
Discontinuance of service to a meter Repeated violations of Section 39
30 days imprisonment, or $1,000 fine Any violation of Section 39
4.5 Revenue Impacts of Reduced Sales During Shortages
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. The most severe restrictions are intended to reduce
consumption by 50%. The impacts of such a reduction on the District’s revenue are shown
in Table 19.
OTAY WATER DISTRICT 2005 URBAN WATER MANAGEMENT PLAN
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Table 19. Actions and Conditions that Impact Revenues
Type Anticipated Revenue Reduction
Reduced water sales (50% reduction) $13.4 million, or 30% of revenues
A 50% reduction in consumption would also reduce the District’s expenditures. The
District’s costs for acquiring and delivering the water to its customers would be reduced, as
shown in Table 20. 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.
Table 20. Actions and Conditions that Impact Expenditures
Category Anticipated Cost Reduction
Reduction in water purchase from Water Authority (50% reduction) $8.6 million, or 20% of expenditures
The tables above show a potential shortfall of $4.8 million annually if consumption were
reduced 50%. If the reduction was due to a short-term situation, the District could absorb
the entire shortfall by drawing on its general fund reserves, which are maintained at a
minimum of $12 million. After conditions returned to normal, the District would replenish
its reserves. The reserve fund could be restored to its full level by increasing rates 1% and
directing the additional revenue to reserves for five years.
The District’s response would be more complex if the 50% reduction in consumption was
expected to be permanent. The District would need to raise the average water bill by
approximately 20% to balance its budget. This rate increase could be accommodated with
phased increases of 5% per year over four years. 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 $4.8 million
shortfall mentioned above includes an anticipated $1.6 million that would go to the Water
Authority as they raise their rates, assuming the reduction was occurring across the region.
The Water Authority would likely spread their rate increases over several years, allowing
the District to do the same.
A summary of the District’s anticipated response is shown in Table 21.
Table 21. Proposed Measures to Overcome Revenue Impacts
Measure Summary of Effects
Rate adjustment 5% annual increase for four years; 20% increase in average water bill
Development of
reserves
Reserves are currently maintained at a minimum of $12 million. With the rate
adjustment, the District would replenish any draw-down of reserves that occurred.
A permanent 50% 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.
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4.6 Draft Ordinance and Use Monitoring Procedure
4.6.1 Water Shortage Contingency Ordinance/Resolution
The District’s Code of Ordinance Draft Section 39 contains specific information on
handling water shortages. A draft version of Section 39 is included as Appendix F.
4.6.2 Mechanism to Determine Reductions in Water Use
Mechanisms to determine reductions in water use include Water Authority water purchase
invoices and records, which show prior use for comparison; and District customer billing
showing 36-month prior consumption history for each customer.
The District has implemented and has operated for many years a Supervisory Control and
Data Acquisition (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 source, 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 in Table 22.
Table 22. Water Use Monitoring Mechanisms
Mechanisms for determining actual reductions Type and quality of data expected
Daily production and distribution records System-wide changes in demand
Customer billing data Month-to-month changes in water use, and year-to-
year changes for key customers
SCADA system Short-term changes in pumping, flow rates, or
reservoir levels showing increased water use
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5. Recycled Water Plan
5.1 Coordination
The District provides wastewater collection and treatment only in a relatively small portion
of its service area. The District owns and operates the RWCWRF, which has the ability to
produce approximately 1.1 mgd of recycled water meeting Title 22 requirements for
landscape irrigation purposes. In the remainder of the District’s water service area,
wastewater is collected by the County of San Diego, the City of Chula Vista, or the City of
San Diego. Wastewater from these agencies is conveyed to the City of San Diego’s
MWWD for treatment. Some of this wastewater is treated by MWWD at its South Bay
Water Reclamation Plant (SBWRP), and the remainder is sent to the Point Loma
Wastewater Treatment Plant for treatment and disposal through an ocean outfall.
The agencies that participate in recycled water planning for the District’s service area are
shown in Table 23.
Table 23. Participating Agencies
Participating agencies Role in Plan Development
Otay Water District Owns and operates Ralph W. Chapman Water Recycling Facility and the
recycled water distribution network
City of San Diego MWWD Owns and operates regional interceptors, South Bay Water Reclamation Plant,
and Point Loma Wastewater Treatment Plant
5.2 Wastewater Quantity, Quality and Current Uses
5.2.1 Wastewater Collection & Treatment
Wastewater generated within the District’s wastewater service area is collected via
approximately 80 miles of sewer mains that flow by gravity to the County of San Diego’s
Steele Canyon Pump Station in Rancho San Diego. Approximately 2 mgd of wastewater
flows to the pump station, from which approximately 1.1 mgd is diverted to the District’s
RWCWRF. The balance of wastewater is sent to MWWD for treatment. At RWCWRF,
tertiary treatment of the 1.1 mgd has the ability to reliably produce approximately 1,230
AF/yr of recycled water. The estimated annual treated flow is shown in Table 24.
Table 24. Wastewater Collected and Treated in District’s Wastewater Service Area – AF/yr
FY
2000
FY
2005
FY
2010
FY
2015
FY
2020
FY
2025
FY
2030
Wastewater collected & treated by District 1,120 1,155 1,230 1,230 1,230 1,230 1,230
Quantity that meets recycled water standard 1,120 1,155 1,230 1,230 1,230 1,230 1,230
A second source of recycled water will be the City of San Diego’s SBWRP. In the fall of
2003, the District signed an agreement with San Diego to purchase an average of 6 mgd of
OTAY WATER DISTRICT 2005 URBAN WATER MANAGEMENT PLAN
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recycled water from the SBWRP. The District also acquired the right to purchase supply
from the SBWRP that exceeds 6 mgd if San Diego has the supply available. The
agreement will increase the District’s recycled water supply from 1.1 mgd to at least 7.1
mgd. A copy of the agreement is included as Appendix D.
The District agreed to build the necessary transmission and related facilities from the
SBWRP to the existing recycled water transmission system. In the first quarter of 2007,
the District is expected to complete construction of the transmission system facilities and
take delivery of the recycled water produced at the SBWRP. The District continues to
expand its recycled water system and has one of the largest distribution systems for
recycled water in San Diego County.
5.2.2 Recycled Water Uses
Currently, there are 491 reclaimed irrigation meters receiving recycled water produced at
the RWCWRF. In 2005, approximately 1.1 mgd of recycled water was supplied to
recycled water users. Current 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. The Olympic Training Center facility in Chula
Vista also uses recycled water to irrigate practice fields and common areas around the
campus. These users collectively demanded more water than the output of RWCWRF, and
the District supplemented the recycled water system with potable water. The total demand
on the District’s recycled water system was 3,485 AF in 2005. Because this demand
exceeded the District’s available supply from RWCWRF, the District used potable water to
supplement the recycled system. The District’s 2005 recycled water use is summarized in
Table 25.
Table 25. Recycled Water Uses – Actual AF/yr
Type of Use Treatment Level FY 2005 AF/yr
Landscape Tertiary – Title 22 1,155
Total 1,155
5.3 Potential and Projected Use, Optimization Plan with Incentives
5.3.1 Potential Uses of Recycled Water
The District’s service area is experiencing rapid growth and development in the geographic
area where recycled water is approved for use. There are two distinct recycled water
market areas within the southern part of the District’s service area, known as the Central
Area and the Otay Mesa Area. The Central Area includes a number of major residential
developments, and the Otay Mesa Area is expected to develop almost exclusively as
industrial with very small commercial and residential land uses. Developers in both
systems are anticipating that recycled water will be available, and dual distribution
pipelines are planned or already in place.
The District’s 2002 Water Resources Master Plan included an assessment of current and
future demand for recycled water. Most of the currently identified uses are for outdoor
irrigation. Other opportunities for the expanded uses of recycled water are being examined,
including but not limited to wetlands and other habitat restoration, groundwater recharge,
OTAY WATER DISTRICT 2005 URBAN WATER MANAGEMENT PLAN
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brackish water intrusion barriers and industrial process water. The juvenile detention
facility in Otay Mesa was constructed with a dual distribution system to allow the use of
recycled water for toilet flushing. When the District’s recycled water system is expanded
to serve this area, the juvenile detention facility will be served with recycled water. The
District has also recently entered into an agreement with Otay Landfill, Inc., the operator of
the Otay Landfill. The landfill operators currently plan to use 100,000 gallons per day
(gpd) of recycled water for daily landfill operations such as dust suppression. This
conversion will offset an equivalent demand for potable water, estimated as 110 AF/yr.
The identified potential uses for recycled water are shown in Table 26.
Table 26. Recycled Water Uses – Potential AF/yr
Type of Use Treatment Level FY 2010 FY 2015 FY 2020 FY 2025 FY 2030
Landscape Tertiary - Title 22 4,040 4,684 5,430 6,294 7,297
Total 4,040 4,684 5,430 6,294 7,297
5.3.2 Recycled Water Demand Projections
Demand for irrigation water varies significantly from month to month in San Diego
County. The existing recycled water demand currently averages approximately 1 mgd
during cold weather and exceeds 5.5 mgd during hot weather. At buildout, the average
daily demand is expected to be 8.2 mgd, with a peak summer month demand of 17.8 mgd.
The District’s recycled supply from RWCWRF and SBWRP will average 7 to 8 mgd over
the course of a year. The District has determined that seasonal storage of recycled water is
not available or cost-effective. Therefore, during peak demand periods the recycled water
system may have to be supplemented with potable water. The District will continue to
review existing and future wastewater treatment facilities in the South County as potential
sources to increase its supply of recycled water. The projected demand for recycled water
is shown in Table 27.
Table 27. Projected Future Use of Recycled Water in Service Area – AF/yr
Type of Use FY 2010 FY 2015 FY 2020 FY 2025 FY 2030
Landscape 4,040 4,684 5,430 6,294 7,297
Total 4,040 4,684 5,430 6,294 7,297
The District’s projected recycled water demand is shown in Figure 4.
OTAY WATER DISTRICT 2005 URBAN WATER MANAGEMENT PLAN
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0
1000
2000
3000
4000
5000
6000
7000
8000
2005 2010 2015 2020 2025 2030
Re
c
y
c
l
e
d
W
a
t
e
r
D
e
m
a
n
d
(
A
F
)
Recycled Supply Potable Supplement
Figure 4. District’s Projected Recycled Water Demand
The District’s 2000 UWMP discussed the use of recycled water from RWCWRF to meet
non-potable demands. The projected use from the 2000 UWMP is shown in Table 28.
Table 28. Recycled Water Uses – 2000 Projection Compared with 2005 Actual – AF/yr
Type of Use 2000 Projection for FY 2005 FY 2005 Actual Use
Landscape 1,120 1,155
Total 1,120 1,155
The actual 2005 use was slightly higher than the 2000 projection. The total demand on the
District’s recycled water system was 3,485 AF in 2005. Because this demand exceeded the
District’s available supply from RWCWRF, the District used potable water to supplement
the recycled system.
5.3.3 Proposed Actions to Encourage Use of Recycled Water
The District made the commitment and 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 any and 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 has also established
financial incentives for the use of recycled water within its service area. The District’s
Code of Ordinance Section 26 details the requirements for the use of recycled water
whenever feasible. Section 26 of the Ordinance is attached as Appendix G.
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6. Water Quality Impacts on Reliability
The District is committed to providing high-quality water to its customers. Each of the
District's water sources has water quality issues, as discussed below.
6.1 Potable Water
The District’s existing potable supply is provided by the Water Authority and Metropolitan
from two sources: the Colorado River and the SWP. The District also has an agreement
with the City of San Diego to receive water from the City’s Otay WTP, which at certain
times may treat local surface water. The District’s future potable supply may include
desalinated ocean water or local groundwater. Each of these sources has unique water
quality issues. Much of this water quality discussion is based on information compiled by
the Water Authority.
6.1.1 Colorado River
Two areas of concern about the quality of Colorado River water are perchlorate and salinity
as measured by total dissolved solids (TDS).
Ammonium perchlorate is used as the main component in solid rocket propellant, and it can
also be found in some types of munitions and fireworks. The primary human health
concern related to perchlorate is its effects on the thyroid. Perchlorate has been detected at
low levels in Metropolitan’s Colorado River water supply.
In 2002 Metropolitan adopted a Perchlorate Action Plan. Metropolitan is actively
monitoring perchlorate levels and working to prevent the introduction of perchlorate into
the Colorado River system. It currently appears that the perchlorate originates from a
contaminated area in Nevada that leads to the Las Vegas Wash and eventually the Colorado
River.
The salinity in Colorado River water is due to naturally occurring saline sediments in the
basin and to high-salinity return flows from agriculture. The range of TDS in the Colorado
River is 525 milligrams per liter (mg/L) during high flows and 900 mg/L during drought
conditions, averaging around 650 mg/L during normal water years. High TDS in water
supplies causes high TDS at wastewater plants and can limit the eventual use of the
recycled water. Additionally, high levels of TDS can damage water delivery systems and
home appliances.
Metropolitan has adopted a Salinity Management Plan to deal with the TDS issues. One
part of this plan is to blend Colorado River water with other sources to achieve a blended
TDS of less than 500 mg/L. Metropolitan is also involved in the Colorado River Basin
Salinity Control Forum, which seeks to intercept and control sources of salt in the basin.
OTAY WATER DISTRICT 2005 URBAN WATER MANAGEMENT PLAN
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6.1.2 State Water Project
Water supplies from the SWP typically have significantly lower TDS levels than the
Colorado River, averaging 250 mg/L. Because of this lower salinity, Metropolitan blends
SWP water with higher salinity Colorado River water to reduce the salinity levels of
delivered water. However, both the supply and the TDS levels of SWP water can vary
significantly in response to hydrologic conditions in the Sacramento-San Joaquin
watersheds.
Water from the SWP also has higher levels of bromide and total organic carbon (TOC) than
Colorado River water. These constituents can lead to the formation of disinfection-by-
products during treatment. The formation of disinfection-by-products can be controlled
through appropriate technology selection and careful monitoring of water quality in the
treatment process and in the distribution system. The California Urban Water Agencies
retained an expert panel that identified target concentrations of bromide (50 parts per
billion) and TOC (3 parts per million) in raw source water. These goals have been adopted
as targets for the SWP intakes in the Sacramento-San Joaquin Delta.
6.1.3 Local Surface Water
Under its agreements with neighboring agencies, it is possible for water from local
watersheds to be delivered to the District. In the past, the quality of local water sources has
been considered good. The most significant reported problem is algae blooms, which can
lead to taste and odor issues.
The Water Authority, the City of San Diego, and the County of San Diego have formed a
Regional Water Management Group to develop an Integrated Regional Water Management
Plan (IRWMP) for the San Diego region. The IRWMP will include measures to protect
and enhance the quality of local water sources. The Water Authority is also working with
its member agencies to improve watershed awareness and management.
6.1.4 Pacific Ocean
The proposed regional seawater desalination project at the Encina Power Station in
Carlsbad will draw water from the Pacific Ocean. The TDS of the Pacific Ocean in San
Diego County averages approximately 34,000 mg/L. The water will undergo a
pretreatment process to remove suspended solids and organic material. The desalination
facility will then use a reverse osmosis (RO) membrane treatment process to reduce the
TDS to less than 350 mg/L. The product water will be post-treated to improve its aesthetic
quality and help prevent corrosion in the distribution system. A residual disinfectant will
also be added to the water. The product water will meet all applicable drinking water
regulations. The brine discharge will be returned to the ocean through the existing outfall
used for cooling water at the power plant. This dilution is expected to minimize any
adverse impacts on ocean water quality or the marine environment.
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6.1.5 Groundwater
The District continues to evaluate the potential for local groundwater supply development.
Two possible water quality issues with groundwater are contamination with Methyl
Tertiary Butyl Ether (MTBE) and high salinity levels.
Until recently, MTBE was used as an additive to gasoline in order to reduce air pollution.
MTBE can leak from underground storage tanks and make its way to groundwater aquifers.
MTBE is very soluble in water and has a low affinity for soil, making treatment of MTBE
more difficult than treatment of other gasoline components. Because of these issues,
California has phased out the use of MTBE as a gasoline additive. As leaking underground
storage tanks are replaced, the risk of MTBE contamination may be reduced.
Increased salinity in groundwater can result from seawater intrusion or return flows from
irrigation that are high in salinity. Water quality officials may restrict the salinity level of
water used for irrigation to protect groundwater supplies. In fact, the District’s permit for
use of recycled water from RWCWRF calls for a maximum TDS of 1,000 mg/L, to protect
the underlying groundwater.
6.2 Recycled Water
The primary water quality issue for use of recycled water is salinity, as measured by TDS.
Conventional wastewater treatment processes are not designed to remove salinity.
Metropolitan’s goal for potable water delivery is a TDS level of 500 mg/L, and residential
use of water can add 200 to 300 mg/L of TDS. TDS concentrations over 1,000 mg/L in
recycled water can lead to restrictions on use in irrigation or other applications
Recycled water from the District’s RWCWRF has consistently had less than 1,000 mg/L
TDS. The District’s contract with the City of San Diego for water from SBWRP calls for
delivery of water with less than 1,000 mg/L TDS.
OTAY WATER DISTRICT 2005 URBAN WATER MANAGEMENT PLAN
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7. Water Service Reliability
The District’s water supplies and expected reliability have been discussed in Section 2.
This section presents tables with expected future demands during normal and dry
conditions and estimated supplies.
Throughout this section, projected supplies are shown to match projected demands. This
level of reliability is based on the documentation in the UWMPs prepared by Metropolitan
and the Water Authority. These agencies have determined that they will be able to meet
potable demands through 2030, during normal and dry conditions. The District currently
relies on these agencies for its potable supply, and the District has worked with
Metropolitan and the Water Authority to prepare consistent demand projections for the
District’s service area. To maintain consistency in planning efforts, the District has shown
future supplies meeting future demands.
7.1 Projected Normal Water Year Supply and Demand
The District’s potable water supply is expected to continue to be supplied by the Water
Authority. Recycled water will provide additional supply. The projected supply and
demand under normal weather are shown in Table 29.
Table 29. Projected Normal Year Supply and Demand Comparison – AF/yr
FY 2005 FY 2010 FY 2015 FY 2020 FY 2025 FY 2030
Water Authority 37,618 45,772 52,349 59,799 66,560 75,108
Recycled 1,155 4,040 4,684 5,430 6,294 7,297
Total Supply 38,773 49,812 57,033 65,229 72,854 82,405
Supply as % of year 2005 100% 128% 147% 168% 188% 212%
Total Demand 38,773 49,812 57,033 65,229 72,854 82,405
Demand as % of year 2005 100% 128% 147% 168% 188% 212%
Difference (supply minus demand) 0 0 0 0 0
7.2 Projected Single-Dry-Year Supply and Demand Comparison
Changes in weather can lead to changes in water use. During dry years, water demands can
be expected to increase. The Water Authority uses a computer model known as CWA-
MAIN to estimate water demands. CWA-MAIN uses demographic and economic data, as
well as weather data, to estimate water demands. Using CWA-MAIN, the Water Authority
estimated dry-year demands for five-year increments from 2010 through 2030. On
average, the dry-year demands were 7% higher than the normal demands. The District has
elected to use the same 7% factor to estimate its dry-year demands. The District’s recycled
water supply was assumed to be “drought-proof” and not subject to reduction during dry
periods.
OTAY WATER DISTRICT 2005 URBAN WATER MANAGEMENT PLAN
39 10/7/2005
The projected dry-year supplies and demands are compared in Table 30.
Table 30. Projected Single Dry Year Supply and Demand Comparison – AF/yr
FY 2010 FY 2015 FY 2020 FY 2025 FY 2030
Water Authority 49,259 56,341 64,365 71,660 80,876
Recycled 4,040 4,684 5,430 6,294 7,297
Total Supply 53,299 61,025 69,795 77,954 88,173
% of Normal Year 107% 107% 107% 107% 107%
Total Demand 53,299 61,025 69,795 77,954 88,173
% of Normal Year 107% 107% 107% 107% 107%
Difference (supply minus demand) 0 0 0 0 0
7.3 Projected Multiple-Dry-Year Supply and Demand Comparison
The Act requires water agencies to project demands and supplies during multiple dry years.
Projections were prepared for five time frames: five-year periods ending in 2010, 2015,
2020, 2025, and 2030. Normal-year demands for intermediate years were interpolated
between the demand values in Table 29. Dry-year demands were assumed to be 7% higher
than normal demands. The available recycled supply was assumed to increase to 4,040
AF/yr beginning in FY 2008, the first full fiscal year after completion of the infrastructure
to bring recycled water from the SBWRP to the District. After 2010, the available recycled
supply for intermediate years was interpolated between the supply values in Table 30.
The estimated supply and demand for five dry years ending in 2010 are summarized in
Table 31.
Table 31. Projected Supply and Demand Comparison during Multiple Dry Year Period Ending in
2010 – AF/yr
FY 2006 FY 2007 FY 2008 FY 2009 FY 2010
Water Authority 42,619 44,982 44,534 46,896 49,259
Recycled 1,230 1,230 4,040 4,040 4,040
Total Supply 43,849 46,212 48,574 50,936 53,299
% of Normal Year 107% 107% 107% 107% 107%
Total Demand 43,849 46,212 48,574 50,936 53,299
% of Normal Year 107% 107% 107% 107% 107%
Difference (supply minus demand) 0 0 0 0 0
The estimated supply and demand for five dry years ending in 2015 are summarized in
Table 32.
OTAY WATER DISTRICT 2005 URBAN WATER MANAGEMENT PLAN
40 10/7/2005
Table 32. Projected Supply and Demand Comparison during Multiple Dry Year Period Ending in
2015 – AF/yr
FY 2011 FY 2012 FY 2013 FY 2014 FY 2015
Water Authority 50,675 52,091 53,509 54,925 56,341
Recycled 4,169 4,298 4,426 4,555 4,684
Total Supply 54,844 56,389 57,935 59,480 61,025
% of Normal Year 107% 107% 107% 107% 107%
Total Demand 54,844 56,389 57,935 59,480 61,025
% of Normal Year 107% 107% 107% 107% 107%
Difference (supply minus demand) 0 0 0 0 0
The estimated supply and demand for five dry years ending in 2020 are shown in Table 33.
Table 33. Projected Supply and Demand Comparison during Multiple Dry Year Period Ending in
2020 – AF/yr
FY 2016 FY 2017 FY 2018 FY 2019 FY 2020
Water Authority 57,946 59,551 61,156 62,760 64,365
Recycled 4,833 4,982 5,132 5,281 5,430
Total Supply 62,779 64,533 66,287 68,041 69,795
% of Normal Year 107% 107% 107% 107% 107%
Total Demand 62,779 64,533 66,287 68,041 69,795
% of Normal Year 107% 107% 107% 107% 107%
Difference (supply minus demand) 0 0 0 0 0
The estimated supply and demand for five dry years ending in 2025 are shown in Table 34.
Table 34. Projected Supply and Demand Comparison during Multiple Dry Year Period Ending in
2025 – AF/yr
FY 2021 FY 2022 FY 2023 FY 2024 FY 2025
Water Authority 65,824 67,283 68,742 70,201 71,660
Recycled 5,603 5,776 5,948 6,121 6,294
Total Supply 71,427 73,059 74,690 76,322 77,954
% of Normal Year 107% 107% 107% 107% 107%
Total Demand 71,427 73,059 74,690 76,322 77,954
% of Normal Year 107% 107% 107% 107% 107%
Difference (supply minus demand) 0 0 0 0 0
The estimated supply and demand for five dry years ending in 2030 are shown in Table 35.
Table 35. Projected Supply and Demand Comparison during Multiple Dry Year Period Ending in
2030 – AF/yr
FY 2026 FY 2027 FY 2028 FY 2029 FY 2030
Water Authority 73,503 75,346 77,190 79,033 80,876
Recycled 6,495 6,695 6,896 7,096 7,297
Total Supply 79,998 82,042 84,086 86,129 88,173
% of Normal Year 107% 107% 107% 107% 107%
Total Demand 79,998 82,042 84,086 86,129 88,173
% of Normal Year 107% 107% 107% 107% 107%
Difference (supply minus demand) 0 0 0 0 0
OTAY WATER DISTRICT 2005 URBAN WATER MANAGEMENT PLAN
41 10/7/2005
8. Adoption and Implementation of UWMP
This Urban Water Management Plan was adopted by the District Board of Directors on
December 7, 2005. A copy of the adoption resolution is attached in Appendix H.
OTAY WATER DISTRICT 2005 URBAN WATER MANAGEMENT PLAN
Appendix A
Text of Urban Water Management Planning Act
Established: AB 797, Klehs, 1983
Amended: AB 2661, Klehs, 1990
AB 11X, Filante, 1991
AB 1869, Speier, 1991
AB 892, Frazee, 1993
SB 1017, McCorquodale, 1994
AB 2853, Cortese, 1994
AB 1845, Cortese, 1995
SB 1011, Polanco, 1995
AB 2552, Bates, 2000
SB 553, Kelley, 2000
SB 610, Costa, 2001
AB 901, Daucher, 2001
SB 672, Machado, 2001
SB 1348, Brulte, 2002
SB 1384, Costa, 2002
SB 1518, Torlakson, 2002
AB 105, Wiggins, 2004
SB 318, Alpert, 2004
CALIFORNIA WATER CODE DIVISION 6
PART 2.6. URBAN WATER MANAGEMENT PLANNING
CHAPTER 1. GENERAL DECLARATION AND POLICY
10610. This part shall be known and may be cited as the "Urban Water Management
Planning Act."
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.
(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
California Urban Water Management Planning Act Page 1
July 5, 2005
its water service sufficient to meet the needs of its various categories
of customers during normal, dry, and multiple dry water years.
(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
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.
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 actively pursue the efficient use of available supplies.
CHAPTER 2. DEFINITIONS
10611. Unless the context otherwise requires, the definitions of this chapter govern the
construction of this part.
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July 5, 2005
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.
10612. "Customer" means a purchaser of water from a water supplier who uses the
water for municipal purposes, including residential, commercial, governmental, and
industrial uses.
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.
10614. "Person" means any individual, firm, association, organization, partnership,
business, trust, corporation, company, public agency, or any agency of such an entity.
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.
10616. "Public agency" means any board, commission, county, city and county, city,
regional agency, district, or other public entity.
10616.5. "Recycled water" means the reclamation and reuse of wastewater for
beneficial use.
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.
CHAPTER 3. URBAN WATER MANAGEMENT PLANS
Article 1. General Provisions
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).
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July 5, 2005
(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 management planning where those plans will reduce preparation
costs and contribute to the achievement of conservation and efficient
water use.
(2) 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.
10621.
(a) Each urban water supplier shall update its plan at least once every five
years on or before December 31, in years ending in five and zero.
(b) Every urban water supplier required to prepare a plan pursuant to this part
shall 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) 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).
Article 2. Contents of Plans
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July 5, 2005
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.
10631. A plan shall be adopted in accordance with this chapter and shall do all of the
following:
(a) Describe the service area of the supplier, including current and projected
population, climate, and other 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.
(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). If groundwater is identified as an
existing or planned source of water available to the supplier, all of the
following information shall be included in the plan:
(1) A copy of 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.
(2) A description of any groundwater basin or basins from which the
urban water supplier pumps groundwater. For those basins for which
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 basins that have not been adjudicated, information as to whether
the department has identified the basin or basins as overdrafted or
has projected that the basin will become overdrafted if present
management conditions continue, 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 eliminate the long-term
overdraft condition.
(3) 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.
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July 5, 2005
(4) A detailed description and analysis of the amount and location of
groundwater that is projected to be pumped by the urban water
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 reliability of the water supply and vulnerability to seasonal or
climatic shortage, to the extent practicable, and provide data for each of the
following:
(1) An average water year.
(2) A single dry water year.
(3) Multiple dry water years.
For any water source that may not be available at a consistent level of use,
given specific legal, environmental, water quality, or climatic factors,
describe plans to supplement or replace that source with alternative
sources or water demand management measures, to the extent
practicable.
(d) Describe the opportunities for exchanges or transfers of water on a short-
term or long-term basis.
(e)
(1) 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, identifying the uses among water use
sectors including, but not necessarily limited to, all of the following
uses:
(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.
(2) The water use projections shall be in the same five-year increments
described in subdivision (a).
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July 5, 2005
(f) Provide a description of the supplier's water demand management
measures. This description shall include all of the following:
(1) A description of each water demand management measure that is
currently being implemented, or scheduled for implementation,
including the steps necessary to implement any proposed measures,
including, but not limited to, all of the following:
(A) Water survey programs for single-family residential and
multifamily residential customers.
(B) Residential plumbing retrofit.
(C) System water audits, leak detection, and repair.
(D) Metering with commodity rates for all new connections and
retrofit of existing connections.
(E) Large landscape conservation programs and incentives.
(F) High-efficiency washing machine rebate programs.
(G) Public information programs.
(H) School education programs.
(I) Conservation programs for commercial, industrial, and
institutional accounts.
(J) Wholesale agency programs.
(K) Conservation pricing.
(L) Water conservation coordinator.
(M) Water waste prohibition.
(N) Residential ultra-low-flush toilet replacement programs.
(2) A schedule of implementation for all water demand management
measures proposed or described in the plan.
(3) A description of the methods, if any, that the supplier will use to
evaluate the effectiveness of water demand management measures
implemented or described under the plan.
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July 5, 2005
(4) An estimate, if available, of existing conservation savings on water use
within the supplier's service area, and the effect of the savings on the
supplier's ability to further reduce demand.
(g) An evaluation of each water demand management measure listed in
paragraph (1) of subdivision (f) that is not currently being implemented or
scheduled for implementation. In the course of the evaluation, first
consideration shall be given to water demand management measures, or
combination of measures, that offer lower incremental costs than expanded
or additional water supplies. This evaluation shall do all of the following:
(1) Take into account economic and noneconomic factors, including
environmental, social, health, customer impact, and technological
factors.
(2) Include a cost-benefit analysis, identifying total benefits and total
costs.
(3) Include a description of funding available to implement any planned
water supply project that would provide water at a higher unit cost.
(4) Include a description of the water supplier's legal authority to
implement the measure and efforts to work with other relevant
agencies to ensure the implementation of the measure and to share
the cost of implementation.
(h) 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, other than the
demand management programs identified pursuant to paragraph (1) of
subdivision (f), that the urban water supplier may implement to increase the
amount of the water supply available to the urban water supplier in
average, single-dry, and multiple-dry 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.
(i) Describe the opportunities for development of desalinated water,
including, but not limited to, ocean water, brackish water, and
groundwater, as a long-term supply.
(j) Urban water suppliers that are members of the California Urban
Water Conservation Council and submit annual reports to that council
California Urban Water Management Planning Act Page 8
July 5, 2005
in accordance with the ‘‘Memorandum of Understanding Regarding
Urban Water Conservation in California,’’ dated September 1991, may
submit the annual reports identifying water demand management
measures currently being implemented, or scheduled for
implementation, to satisfy the requirements of subdivisions (f) and (g).
(k) Urban water suppliers that rely 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 (c). 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 (c), including, but not limited to, ocean water, brackish
water, and groundwater, as a long-term supply.
10631.5. The department shall take into consideration whether the urban water supplier
is implementing or scheduled for implementation, the water demand management
activities that the urban water supplier identified in its urban water management plan,
pursuant to Section 10631, in evaluating applications for grants and loans made
available pursuant to Section 79163. The urban water supplier may submit to the
department copies of its annual reports and other relevant documents to assist the
department in determining whether the urban water supplier is implementing or
scheduling the implementation of water demand management activities.
10632. The plan shall provide an urban water shortage contingency analysis which
includes each of the following elements which are within the authority of the urban water
supplier:
(a) Stages of action to be undertaken by the urban water supplier in response
to water supply shortages, including up to a 50 percent reduction in water
supply, and an outline of specific water supply conditions which are
applicable to each stage.
(b) An estimate of the minimum water supply available during each of the next
three water years based on the driest three-year historic sequence for the
agency's water supply.
(c) Actions to be undertaken by the urban water supplier to prepare for, and
implement during, a catastrophic interruption of water supplies including,
California Urban Water Management Planning Act Page 9
July 5, 2005
but not limited to, a regional power outage, an earthquake, or other
disaster.
(d) Additional, mandatory prohibitions against specific water use practices
during water shortages, including, but not limited to, prohibiting the use of
potable water for street cleaning.
(e) Consumption reduction methods in the most restrictive stages. Each urban
water supplier may use any type of consumption reduction methods in its
water shortage contingency analysis that would reduce water use, are
appropriate for its area, and have the ability to achieve a water use
reduction consistent with up to a 50 percent reduction in water supply.
(f) Penalties or charges for excessive use, where applicable.
(g) An analysis of the impacts of each of the actions and conditions described
in subdivisions (a) to (f), inclusive, on the revenues and expenditures of the
urban water supplier, and proposed measures to overcome those impacts,
such as the development of reserves and rate adjustments.
(h) A draft water shortage contingency resolution or ordinance.
(i) A mechanism for determining actual reductions in water use pursuant to the
urban water shortage contingency analysis.
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.
California Urban Water Management Planning Act Page 10
July 5, 2005
(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, 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.
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
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 total projected water use
over the next 20 years, in five-year increments, for a normal water year, a
single dry water year, and multiple dry 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.
California Urban Water Management Planning Act Page 11
July 5, 2005
(b) 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.
(c) Nothing in this article is intended to create a right or entitlement to water
service or any specific level of water service.
(d) 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.
Articl 3. Adoption and Implementation of Plans
10640. 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.
10641. An urban water supplier required to prepare a 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.
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 the plan. Prior to adopting a plan, the urban water
supplier shall make the plan available for public inspection and shall hold a public
hearing thereon. Prior to the hearing, notice of the time and place of 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 hearing to any city or county within which the supplier provides water
supplies. A privately owned water supplier shall provide an equivalent notice within its
service area. After the hearing, the plan shall be adopted as prepared or as modified
after the hearing.
10643. An urban water supplier shall implement its plan adopted pursuant to this
chapter in accordance with the schedule set forth in its plan.
10644.
(a) An urban water supplier shall file with the department 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
California Urban Water Management Planning Act Page 12
July 5, 2005
plans shall be filed with the department and any city or county within which
the supplier provides water supplies within 30 days after adoption.
(b) The department shall prepare and submit to the Legislature, on or before
December 31, in the years ending in six and one, a report summarizing the
status of the plans adopted pursuant to this part. The report prepared by the
department shall identify the outstanding elements of the individual plans.
The department shall provide a copy of the report to each urban water
supplier that has filed its plan with the department. The department shall
also prepare reports and provide data for any legislative hearings designed
to consider the effectiveness of plans submitted pursuant to this part.
10645. 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.
CHAPTER 4. MISCELLANEOUS PROVISIONS
10650. Any actions or proceedings 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 shall be commenced
within 18 months after that adoption is required by this part.
(b) Any action or proceeding alleging that a plan, or action taken pursuant to
the plan, does not comply with this part shall be commenced within 90 days
after filing of the plan or amendment thereto pursuant to Section 10644 or
the taking of that action.
10651. In any action or proceeding to attack, review, set aside, void, or annul a plan, or
an action taken pursuant to the plan 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.
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 plan, other than
projects implementing Section 10632, or any project for expanded or additional water
supplies.
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July 5, 2005
10653. The adoption of a plan shall satisfy any requirements of state law, regulation, or
order, including those of the State Water Resources Control Board and the Public
Utilities Commission, for the preparation of water management plans or conservation
plans; provided, that if the State Water Resources Control Board or the Public Utilities
Commission requires additional information concerning water conservation 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 prepared to meet 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.
10654. An urban water supplier may recover in its rates the costs incurred in preparing
its plan and implementing the reasonable water conservation measures included in the
plan. Any best water management practice that is included in the plan that is identified
in the "Memorandum of Understanding Regarding Urban Water Conservation in
California" is deemed to be reasonable for the purposes of this 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.
10656. An urban water supplier that does not prepare, adopt, and submit its urban
water management plan to the department in accordance with this part, is ineligible to
receive funding pursuant to Division 24 (commencing with Section 78500) or Division 26
(commencing with Section 79000), or receive drought assistance from the state until the
urban water management plan is submitted pursuant to this article.
10657.
(a) The department shall take into consideration whether the urban water
supplier has submitted an updated urban water management plan that is
consistent with Section 10631, as amended by the act that adds this
section, in determining whether the urban water supplier is eligible for funds
made available pursuant to any program administered by the department.
(b) This section shall remain in effect only until January 1, 2006, and as of that
date is repealed, unless a later enacted statute, that is enacted before
January 1, 2006, deletes or extends that date.
California Urban Water Management Planning Act Page 14
July 5, 2005
OTAY WATER DISTRICT 2005 URBAN WATER MANAGEMENT PLAN
Appendix B
Agreement with San Diego County Water Authority for Potable Water Supply from
Helix Water District
OTAY WATER DISTRICT 2005 URBAN WATER MANAGEMENT PLAN
Appendix C
Agreement with City of San Diego for Potable Water Supply from Otay WTP
OTAY WATER DISTRICT 2005 URBAN WATER MANAGEMENT PLAN
Appendix D
Agreement with City of San Diego for Recycled Water Supply from SBWRP
OTAY WATER DISTRICT 2005 URBAN WATER MANAGEMENT PLAN
Appendix E
BMP Reports 2001 - 2004
OTAY WATER DISTRICT 2005 URBAN WATER MANAGEMENT PLAN
Appendix F
Otay Water District Draft Code of Ordinance Section 39
39-1 5/18/92
SECTION 39 CONSERVATION AND WATER SHORTAGE RESPONSE
PROGRAM
39.01 DECLARATION OF POLICY.
California Water Code Sections 375 et seq. permit
public entities which supply water at retail to adopt and
enforce a water conservation program to reduce the quantity
of water used by the people therein for the purpose of con-
serving the water supplies of such public entity. The Board
of Directors hereby establishes a comprehensive water con-
servation 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 shortage.
39.02 FINDINGS
The Board of Directors finds and determines that the
conditions prevailing in San Diego County, including the
region’s reliance on imported water, requires that available
water resources be put to maximum beneficial use to the
extent to which they are capable; that the waste or
unreasonable use, or unreasonable method of use of water be
prevented; and that the conservation of such water be
encouraged with a view to the maximum reasonable and
beneficial use thereof in the interests of the people of the
District and for the public welfare.
Notwithstanding local and regional efforts to diversify
water supplies to improve reliability, the Board of
Directors furthermore finds and determines that a water
shortage may occur based upon one or more of the following
conditions:
A.A general water supply shortage due to
increased demand or limited supplies.
B.Treatment, distribution or storage facilities
of the Metropolitan Water District of
Southern California (Metropolitan) or the San
Diego County Water Authority (Water
Authority) or of other agencies become
inadequate.
C.A major failure or disruption of the water
supply, treatment, storage or distribution
facilities of the Metropolitan, the Water
Authority, or of other agencies occurs.
D.A major failure or disruption of the water
supply, storage or distribution facilities of
the District.
39.03 APPLICATION
39-2 5/18/92
The provisions of this Section 39 shall apply to all
water served to persons, customers, and property by the
District.
A.Exceptions - The provisions of this Section 39
shall not apply to any hospital, health care or
convalescent facility, veterans home or any
other type of facility where the health and
welfare would be affected by restricted water
use. This shall also not apply to veterinary
hospitals and facilities. However, this
Section 39 does apply to outdoor grounds, yard
and parking areas of these facilities.
39.04 AUTHORIZATION
The District General Manager, or a designated
representative, is hereby authorized and directed to imple-
ment the provisions of this Section 39. Additionally, the
General Manager, or designated representative, is hereby
authorized to make minor and limited exceptions to prevent
undue hardship or unreasonable restrictions, provided that
water shall not be wasted or used unreasonably and the
purposes of this Section 39 can be accomplished.
39.05 WATER CONSERVATION PROGRAM
The District will evaluate and implement activities
that encourage water conservation with the goal of using
water more efficiently, including notifying customers that
the following measures apply at all times and until further
notification:
A.No customer of the District shall knowingly
use water or permit the use of water supplied
by the District for residential, commercial,
industrial, agricultural, governmental or any
other purpose in a manner contrary to any
provision of this Section 39.
B.Water may not be allowed to leave the
customer's property by drainage onto adjacent
properties or public or private roadways or
streets due to excessive irrigation, poor
design and/or neglect.
C.Customers are required to repair all water
leaks within 48 hours of knowledge that a
leak exists.
D.Water should not be used to wash down
sidewalks, driveways, parking areas, tennis
39-3 5/18/92
courts, patios, or other paved areas except
to alleviate immediate safety or sanitation
hazards.
E.Lawn watering or irrigation is recommended to
occur two (2) hours after sunset and an at
least one (1) hour before sunrise. New
plantings and newly seeded areas are exempt
from these limits for 30 days.
F.Customers are encouraged to use an automatic
shutoff nozzle when using a hand-held hose
for spraying, lawn watering, vehicle washing
or structure washing.
G.Water may not be used for new single pass
evaporative cooling systems, new non-recirculating
conveyor car wash systems, new non-recirculating
decorative fountains, and new non-recirculating
commercial laundry systems.
39.06 WATER SHORTAGE CONTINGENCY PLAN
A. STAGE I
1.Defined as: A temporary general water supply
shortage due to increased demand or limited
supplies such as a disruption to the potable
water treatment, distribution or storage
facilities of Metropolitan or the Water
Authority, or of other agencies whereby such
systems become inadequate to meet local or
regional demand.
2. In addition to efficiency measures cited in
39.05, the following actions may be
implemented in concert with Metropolitan or
Water Authority announcements and
determinations of water availability, or as
deemed necessary by the District:
a. Operations staff shall closely monitor
water storage levels and consumption
rates and report this information to the
Senior Management Team.
b. Staff shall make efforts to communicate
the additional need for customers to
conserve water.
c.As necessary, staff will evaluate
activating interagency connections.
39-4
B. STAGE II
1.Defined as: A longterm scheduled or
unscheduled shutdown, major system
disruption, or multiyear drought; dependent
on the severity and estimated duration of the
water shortage. Includes events leading to
MWD or the Water Authority notifying member
agencies that water deliveries will be
reduced for a limited period of time.
2.The following measures can be implemented to
achieve up to a fifteen percent (15%)
reduction in treated water use:
a. Large irrigation customers will be asked
to reduce usage. Treated water
allocations for large landscape
customers may be reduced if goals are
not met in order to achieve Metropolitan
or Water Authority reduction targets.
b.The District will notify developers and
contractors that any excavation or other
earthwork being performed must maintain
a minimum 20-foot horizontal clearance
from any water lines in operation, water
mains or District easements.
c. Treated water deliveries to Mexico may
be reduced or suspended.
3.The following measures can be implemented to
achieve up to a twenty-five percent (25%)
reduction in treated water use:
a. Lawn watering or irrigation is
prohibited during daylight hours.
b. Use of a hand-held hose for spraying,
lawn watering, vehicle washing or
structure washing is prohibited without
an automatic shut-off nozzle.
c. Customers will receive notice of the
need for additional indoor and outdoor
conservation including eliminating a
watering day or postponing all outdoor
water use such as car washing, delaying
the installation of new plantings or
reseeding turf areas until water flows
return to normal.
39-5
d. Water conservation and use restrictions
will be enforced.
e. Use of potable water for commercial
street cleaning shall be prohibited.
f.District shall consider mandating water
budgets for large landscape accounts.
4.The following measures shall occur to achieve
up to a fifty percent (50%) reduction in
treated water use:
a.Stage I conservation measures become
mandatory except as provided in this
section.
b. Staff shall coordinate with MWD or the
Water Authority to issue press
notification to the media.
c. The filling or refilling of swimming
pools, artificial ponds, lakes and
ornamental fountains shall be
prohibited including those using
recycled water.
d. No non-residential fountains shall be
operated.
e. Customers shall be asked to reduce or
postpone landscape irrigation and delay
or prohibit installing new turf,
plantings or reseeding turf areas. The
district shall consider providing
incentives to remove or replace exiting
turf or plantings.
f. Commercial landscape accounts shall
reduce or postpone landscape irrigation.
Reduction targets may be established to
achieve regional conservation goals.
g.Residential car washing will be
prohibited. Customers will be urged to
use commercial car washes that recycle
their water.
h.The District will notify developers and
contractors that any excavation or other
earthwork being performed must maintain
a minimum 20-foot horizontal clearance
39-6
from any water lines in operation,
water mains or district easements.
i. Treated water deliveries to Mexico will
be reduced or suspended.
j.Reduce or suspend any augmentation of
the recycled water distribution system.
k.Activate additional district
interconnections as-needed.
l. District shall consider mandating water
budgets for all customers.
m.District will consider reassigning
personnel to enforce provisions of
Section 39.
n. All water use from temporary meters
shall be suspended.
C. STAGE III
1.Defined as: A major unscheduled shutdown or
disruption to the treated or untreated water
systems such as those caused by natural
disaster, major system failure, or acts of
war.
2. In addition to making every effort to
urgently communicate the need to conserve
water, the following measures shall apply
during a Stage III water emergency to achieve
up to a fifty percent (50%) reduction in
treated water use:
a.All water use from temporary meters
shall be suspended.
b.Activate district interconnections as-
needed.
c.Suspend augmentation of the recycled
water distribution system.
d.Staff shall coordinate with MWD or the
Water Authority to issue press
notification to the media.
e.Activate, if necessary, the Emergency
Operations Center (EOC).
39-7
f.All outdoor irrigation may be prohibited
including residential, commercial and
irrigation customers.
g.All of the above mentioned measures
shall be strictly implemented and
enforced.
h.Suspend treated water deliveries to
Mexico.
m.District will consider reassigning
personnel to enforce provisions of
Section 39.
39.07 IMPLEMENTATION OF CONSERVATION STAGES
A.The District shall monitor the projected supply
and demand for water by its customers on a daily
basis. The General Manager shall determine the
extent of the conservation required through the
implementation and/or termination of conservation
stages in order for the District to prudently plan
for and supply water to its customers.
B. If the General Manager determines it is necessary
for the District to declare a stage of water alert
higher than that which the Water Authority has
declared, the General Manager may order the
appropriate stage of water conservation be
implemented or terminated in accordance with the
applicable provisions of the District Code of
Ordinances.
C.Stage II and Stage III declarations and
notifications shall be published a minimum of
three consecutive times in a newspaper of general
circulation.
D. The stage designated shall become effective
immediately upon announcement.
E.Stage I, II and III declarations shall be reported
to the Board of Directors at its next regular
meeting. The Board shall thereupon ratify the
declaration, rescind the declaration, or direct
the declaration of a different stage.
39.08 SURCHARGES FOR NONCOMPLIANCE.
A.The implementation and administration of the
conditions of this Section 39 impose additional
administrative and operational costs in the District's
39-8
operations. For such reasons, surcharges are hereby
imposed for customer violations of requirements or
prohibitions set forth in Section 39. The surcharges
will be administered by the Finance Department
B.The surcharges imposed are as follows:
1.The first violation of Section 39 by a
customer shall result in a written letter of
warning to the customer.
2.The second violation of Section 39 within a
twelve-month moving year shall result in a
Notice of Violation.
3.The third violation of Section 39 within a
twelve-month moving year by a customer shall
result in a $100 surcharge to be added to the
customer's bill for services.
4.The fourth violation of Section 39 within a
twelve-month moving year by a customer shall
result in a $200 surcharge to the customer’s
bill for services.
5.Any subsequent violation within a twelve-
month moving year shall result in a $200
surcharge to the customer’s bill for
services.
C.The "twelve-month moving year" is defined as the
most recent consecutive twelve months at the time
of a violation.
D. Any surcharge imposed shall be added to the
customer's next billing for water service and
shall be due and payable in accordance with
requirements for payment of regular water bills
for service.
39.09 ACCUMULATED VIOLATIONS
At such time as MWD, the Water Authority or District
General Manager declares that shortages are no longer in
effect, all violations accumulated to a customer's account
under this Section 39 shall be reduced to zero.
39.10 LIMITING OR DISCONTINUING SERVICE
Maximizing available water resources and beneficial use
is in the interest of the people of the district. Therefore,
the waste or unreasonable use, or unreasonable method of
39-9
use, of water is not in the public interest and shall be
prevented. For such reasons, limiting or discontinuing
service may hereby be imposed on customers for violations or
repeated violations of requirements or prohibitions set
forth in Section 39.
A.At any time the district may temporarily
deactivate a potable or recycled water meter if a
customer is in violation of any applicable
provision of Section 39.
B.The second violation of these statues, within a
twelve-month moving year, may result in the
installation of a flow restrictor on a meter, or
the temporary deactivation of the meter.
C.Repeated violations may result in discontinuance
of service to the meter.
D.Flow Restrictor Usage -
1.The first installation of a flow restrictor
shall be for a period of seven days.
2. Each subsequent violation may result in an
additional period of seven days being added
to provide a cumulative period for the
installation of the flow restrictor,
basedupon seven days for each violation
beginning with the second violation (i.e.,
the fourth violation will result in a 21-day
period).
3.For each violation the customer must pay a
charge of $125 for installing and removing
the flow restrictor.
1024125
39.11 PENALTY.
As provided in Water Code Section 377, any viola-
tion of this Section 39 is a misdemeanor. Upon conviction
thereof such person shall be punished by imprisonment in the
county jail for not more than 30 days, or by fine not
exceeding one thousand dollars ($1,000), or by both. In
addition to any other remedies which the District may have
for the enforcement of this Section, service of water shall
be discontinued or appropriately limited to any customer who
willfully uses water or permits the use of water in
violation of any provision hereof.
OTAY WATER DISTRICT 2005 URBAN WATER MANAGEMENT PLAN
Appendix G
Otay Water District Code of Ordinance Section 26
26-1
SECTION 26 WATER RECLAMATION PLAN AND IMPLEMENTING PROCEDURES
26.01 FINDINGS
The state policies regarding use of reclaimed water are
in the best interest of the Otay Water District. The major-
ity of jurisdictions in San Diego County have adopted meas-
ures to promote water reclamation. This ordinance is nec-
essary 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 reclaimed water, the need for additional
imported water can be reduced. In light of these circum-
stances, certain uses of potable water may be considered
unreasonable or to constitute a nuisance where reclaimed
water is available or production of reclaimed water is
unduly impaired. Reclaimed water would be more readily
available in seasons of drought when the supply of potable
water for nonessential uses may be uncertain.
26.02 USE OF RECLAIMED WATER
A.District Policy: It is the policy of the Dis-
trict that reclaimed 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.
B.Required Use for Greenbelt Purposes: 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 land-
scaped areas, when, following notice and a hear-
ing, the District finds that reclaimed water is
available under the following conditions:
1.the reclaimed water is of adequate quality
and is available for such greenbelt use;
2.the reclaimed 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
26-2
4.the use of reclaimed water will not adversely
affect downstream water rights, will not
degrade water quality.
The findings may include terms and conditions
under which reclaimed water shall be used. In
addition, the District may assist the customer in
obtaining any permits or approvals required for
the use of reclaimed 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.Reclaimed Water Distribution System: A piping
system intended for the delivery of reclaimed
water separate form 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
industrial waste 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.
26-3
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.Reclaimed Water: Reclaimed 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.Waste Discharge: Waste Discharge means water
deposited, released or discharged into a sewer
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 Reclamation Master Plan to define,
encourage, and develop the use of reclaimed water
within the District's boundaries. The Master Plan
shall be updated not less often than every five
years.
B.Contents of the Reclamation Master Plan: The Mas-
ter Plan shall include, but not be limited to, the
following:
1.Plants and Facilities. Evaluation of the
location and size of present and future rec-
lamation treatment plants, distribution pipe-
lines, pump stations, reservoirs, and other
related facilities, including cost estimates
and potential financing methods.
2.Reclaimed Water Service Areas. A designa-
tion, based on the criteria set forth in Sec-
tion 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 reclaimed water in lieu
of potable water. Reclaimed 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.
26-4
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 Reclaimed. For each
water reclamation treatment facility, evalu-
ate water quality with respect to the effect
on anticipated uses of reclaimed 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 reclaimed 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
reclaimed 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 Reclaimed Water Use. For each
reclaimed 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
reclaimed water. As appropriate, mandate
construction of reclaimed water distribution
systems or other facilities in new and exist-
ing developments for current or future
reclaimed 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
26-5
to assist water users in the financing of
necessary conversions.
7.Rules and Regulations. Establish general
rules and regulations governing the use and
distribution of reclaimed 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 reclaimed water.
26.05 PROCEDURES
A.Existing Potable Water Service.
1.Preliminary Determination. Based upon the
Master Plan, upon the designation of each
reclaimed water service area or the commence-
ment of the design of new reclaimed 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 reclaimed water. Each
water customer shall be notified of the basis
for a determination that conversion to
reclaimed 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
reclaimed 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
26-6
shall confirm, modify or abandon the prelimi-
nary determination. Upon issuance of a final
determination by Staff, customer may appeal
the determination upon written application to
the Board of Directors after the final deter-
mination made by the Staff. (Engineering
Department).
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-
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 reclaimed water or to include facilities
designed to accommodate the use of reclaimed
water in the future. Based upon such deter-
mination, use of reclaimed water and provi-
sion of reclaimed water distribution systems
or other facilities for the use of reclaimed
water, and application for a permit for such
use may be required a 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 reclaimed water or to include
facilities designed to accommodate the use of
reclaimed water in the future. Based upon
such determination, use of reclaimed water
and provision of reclaimed water distribution
systems or other facilities for the use of
reclaimed 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-
26-7
ment application or application for water
service.
4.Requested Service. On a case-by-case basis,
upon application for a permit to use
reclaimed 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
reclaimed water. Based upon such determina-
tion, the application for the permit shall be
accepted and processed subject to Section
26.05.C.
C.Reclaimed Water Permit Process. Upon a final
determination by the General Manager that a prop-
erty shall be served with reclaimed water, or
adoption of a condition of development approval or
water service requiring use or accommodation of
the use of reclaimed water, the water customer
owner or applicant shall obtain a reclaimed 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 Reclamation 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 reclaimed and
non-reclaimed water distribution systems for
the parcel shall be reviewed by the District
Engineer and a field inspection conducted
before the permit is granted.
3.Permit Issuance. Upon approval of plans the
permit shall be issued. Reclaimed water
shall not be supplied to a property until
inspection by the District Engineer deter-
mines that the applicant is in compliance
with the permit conditions.
D.Temporary Use of Potable Water. At the discretion
of the General Manager, potable water may be made
available on a temporary basis, until reclaimed
water is available. Before the applicant receives
temporary potable water, a water reclamation per-
26-8
mit, as described in Section 26.05.C, must be
obtained for new on-site distribution facilities.
Prior to commencement of reclaimed 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
reclaimed 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.Reclaimed Water Rate. The rate charged for
reclaimed water shall be established by Ordinance
of the Board of Directors.
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
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 reclaimed water within an area which has been
planned for reclaimed 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.
A.Public Nuisance. Discharge of wastes or the use
of reclaimed water in any manner in violation of
26-9
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 reclaimed water is in violation of this ordi-
nance or otherwise causes or threatens to cause a
condition of nuisance, the District may seek
injunctive relief as may be appropriate to enjoin
such discharge or use.
C.Permit Revocation. In addition to any other stat-
ute or rule authorizing termination of water serv-
ice, the General Manage may revoke a permit issued
hereunder if a violation of any provision of this
ordinance is found to exist or if a discharge of
wastes or use of reclaimed water causes or threat-
ens to cause a nuisance.
D.Penalty. Any owner and/or operator who violates
this ordinance shall, for each day of violation,
or portion thereof, be subject to a fine not
exceeding $1,000. In addition, water service to
the property may be discontinued.
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.
OTAY WATER DISTRICT 2005 URBAN WATER MANAGEMENT PLAN
Appendix H
Resolution of Adoption and Related Documentation