City of Watsonville Water Supply and Distribution System ...

Watsonville, California
February 2006 Table Of Contents Table Of Contents ii
Contact Sheet vi Background 2
Resource Maximization/ Import Minimization 2 Section 1 2 Agency Coordination 2 Section 2 4 Service Area Information 4 Water Sources 6 Existing Water Supply Sources 6
Water Distribution System 9
Water Sources Groundwater 9
Overdraft in the Pajaro Valley Basin 10
Proposed PVWMA Water Supply Projects 10
Other Potential Water Supplies 13
Reliability of Supply 14
Transfer and Exchange Opportunities 15
Water Use By Customer Type - Past, Current and Future 15
Sales to Other Agencies 16 Section 3 17 Demand Management Measures 17
DMM 1 -- Interior and Exterior Water Audits for Single Family and Multi-
Family Customers 18
DMM 2 -- Plumbing Retrofit 18
DMM 3 -- Distribution System Water Audits, Leak Detection and Repair 18
DMM 4 -- Metering with Commodity Rates 19
DMM 6 -- Landscape Water Conservation Requirements 19
DMM 7 -- Public Information 20
DMM 8 -- School Education 21
DMM 9 -- Commercial and Industrial Water Conservation 22
DMM 10 -- New Commercial and Industrial Water Use Review 22
DMM 11 -- Conservation Pricing, Water Service and Sewer Service 22
DMM 12 -- Landscape Water Conservation for New and Existing Single Family
Homes 23
DMM 13 -- Water Waste Prohibition 23
DMM 14 -- Water Conservation Coordinator 24
DMM 15 -- Financial Incentives 25
DMM 16 -- Ultra-low Flush Toilet Replacement 25
Evaluation of DMM's Not Implemented 25
Future Water Supply Projects 26
Development of Desalinated Water 26
Current or Projected Supply of Wholesale Water 26 Section 4 27 Water Shortage Contingency Plan 28
Estimation of Supply for Next Three Years 28
Preparation for Catastrophic Water Supply Interruption 28
Water Shortage - Prohibitions, Consumption Reduction Methods 29
Water Shortage Contingency Ordinance/Resolution 29
Mandatory Prohibitions on Water Wasting 29
Monitoring Program 33
Analysis of Revenue Impacts of Reduced Sales During Shortages 33 Section 5 35 Recycled Water Plan 35
Wastewater Quantity, Quality and Current Uses. 35
Potential and Projected Use, Optimization Plan with Incentives 36
Methods To Encourage Recycled Water Use 37 Section 6 38 Water Quality Impacts on Reliability 38 Section 7 39 Projected Normal Water Year Supply and Demand 39
Projected Single- Dry- Year Supply and Demand Comparison 40
Water Service Reliability 2006 - 2010 41
Projected Multiple Dry Year Supply and Demand Comparison 41
Water Service Reliability 2011 - 2015 42
Water Service Reliability 2016 - 2020 43
Water Service Reliability 2021 - 2025 44 APPENDIX A 45 PVWMA Basin Management Plan 45 APPENDIX B 46 City of Watsonville Water Supply and Distribution System Emergency
Response Plan 46 APPENDIX C 47 Water Conservation Program Descriptions and Public Education Materials 47 Appendix D 48 Draft Resolution Declaring A Water Supply Emergency And Establishing Water
Use Reductions 48 APPENDIX E. 60 Resolutions Establishing the Outside of Watsonville Water Connections,
Goals, Objectives, and Policies" for Rural and Urban Areas 60 List of Tables
Table 1 Coordination with Appropriate Agencies 3
Table 2 Watsonville Service Area Population Projections 5
Table 3 Service Area Climate 5
Table 4. Existing and Planned Water Supply Sources 6
Table 5 Groundwater Pumping Volumes 6
Table 6 Projected Groundwater Pumping Volumes 7
Table 7. PVWMA Water Supply Projects 11
Table 8. Reliability of Water Supply 14
Table 9 Basis Of Water Year Data 15
Table 10 Factors Resulting In Inconsistency of Supply 15
Table 11 Past, Current and Projected Water Deliveries 16
Table 12. Action Levels: Reduction from 24,000 Acre-Feet/Year 28
Table 13 Three Year Estimated Minimum Water Supply - AF/Yr 28
Table 14 Preparation Actions for a Catastrophe 29
Table 15 Mandatory Prohibitions 30
Table 16 Consumption Reduction Methods 30
Table 17 Penalties and Charges 31
Table 18 Participating Agencies 35
Table 19 Wastewater Collected and Treated 36
Table 20 Disposal of Wastewater 36
Table 21 Projected Future Use of Recycled Water 36
Table 22 Projected Normal Year Water Supply - AF/Y 39
Table 23 Projected Normal Year Water Demand - AF/Y 39
Table 24 Projected Normal Year Supply and Demand Comparison AF/Y 39
Table 25 Projected Single Dry Year Water Supply AF/Y 40
Table 26 Projected Single Dry Year Water Demand AF/Y 40
Table 27 Projected Single Dry Year Supply and Demand Comparison AF/Y
40
Table 28 Projected Supply During Multiple Year Period Ending in 2010 - AF/Y
41
Table 29 Projected Demand During Multiple Year Period Ending in 2010 - AF/Y
41
Table 30 Projected Multiple Year Supply and Demand Comparison AF/Y 41
Table 31 Projected Supply During Multiple Year Period Ending in 2015 - AF/Y
42
Table 32 Projected Demand During Multiple Year Period Ending in 2015 - AF/Y
42
Table 33 Projected Multiple Year Supply and Demand Comparison AF/Y 42
Table 34 Projected Supply During Multiple Year Period Ending in 2020 - AF/Y
43
Table 35 Projected Demand During Multiple Year Period Ending in 2020 - AF/Y
43
Table 36 Projected Multiple Year Supply and Demand Comparison AF/Y 43
Table 37 Projected Supply During Multiple Year Period Ending in 2025 - AF/Y
44
Table 38 Projected Demand During Multiple Year Period Ending in 2025 - AF/Y
44
Table 39 Projected Multiple Year Supply and Demand Comparison AF/Y 44
City of Watsonville 2005 Urban Water Management Plan Contact Sheet Name of person preparing this plan: Robert Ketley E-mail address: rketley@ci.watsonville.ca.us The Water supplier is a: Municipality The Water supplier is a: Retailer Utility services provided by the water supplier include: Water Is This Agency a Bureau of Reclamation Contractor? No Is This Agency a State Water Project Contractor? No Water Code Section 10620
10620. (a) Every urban water supplier shall prepare and adopt
an urban water management plan in the manner set forth in
Article 3 (commencing with Section 10640).
(b) Every person that becomes an urban water supplier shall
adopt an urban water management plan within one year after it
has become an urban water supplier.
(c) An urban water supplier indirectly providing water shall
not include planning elements in its water management plan as
provided in Article 2 (commencing with Section 10630) that would
be applicable to urban water suppliers or public agencies
directly providing water, or to their customers, without the
consent of those suppliers or public agencies.
(d) (1) An urban water supplier may satisfy the requirements
of this part by participation in areawide, regional, watershed,
or basinwide urban water 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.
Background In 1984, the California Legislature enacted Assembly Bill 797, which is
known as the Urban Water Management Planning Act. This law mandates that
every supplier providing water to more than 3,000 customers prepare an
Urban Water Management Plan, the primary objective of which is to plan for
the conservation and efficient use of water. The Plan must be reviewed
every five years and must be adopted after public review and hearing. It is
then filed with the California Department of Water Resources (DWR) who
provides a report to the legislature summarizing the status of all plans
submitted.
Resource Maximization/ Import Minimization The City has incorporated a number of resource maximization tools into the
management and operation of the water utility. The City's main emphasis is
in water conservation as detailed in the Demand Management Measures
included elsewhere in this report. City coordination with PVWMA on the
basin management plan is aimed at reducing the current overdraft. This will
help reduce the amount of water potentially required for basin management
through importation from the San Felipe water system.
Section 1 Water Code Section 10621
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 s