Otay Water District 2020 UWMP Complete.Pdf[Icon]

Otay Water District 2020 Urban Water Management Plan Update Prepared by Otay Water District 2554 Sweetwater Springs Boulevard Spring Valley, California 91978 JUNE 2021 1-i Table of Contents Section Page Acronyms and Abbreviations…………………………………......……………………..................….............iv Introduction & Lay Description………………………………………………………………………………………. 1-1 1.1 Changes to the California Urban Water Management Planning Act…….... 1-1 1.2 Senate Bills 610 and 221………………………………………………………………………… 1-2 1.3 Water Conservation Components of UWMP Legislation………………………… 1-2 1.4 Lay Description………………………………………………………………………………………. 1-4 Plan Preparation……………………………………………………………………………………………………………… 2-1 2.1 Basis and Approach for Preparing the UWMP………………………………………… 2-1 2.2 Level of Planning and Compliance……………………………………………………….... 2-1 2.3 Agency Coordination and Outreach………………………………………………………. 2-2 Service Area Characteristics……………………………………………………………………………………………. 3-1 3.1 Service Area Description………………………………………………………………………… 3-1 3.2 Service Area Population…………………………………………………………………………. 3-3 3.3 Climate Data……………………………………………………………………………………….... 3-3 Customer Water Use………………………………………………………………………………………………………. 4-1 4.1 Existing Water Use by Customer Class........................................................ 4-1 4.2 Projected Future Water Demands.............................................................. 4-2 4.3 Service Area Sales and System Losses........................................................ 4-6 4.4 Projected Future Water Conservation Savings........................................... 4-6 4.5 Lower Income Water Demand Projections................................................. 4-7 4.6 Climate Change........................................................................................... 4-7 Conservation Target Compliance......................................................................................... 5-1 5.1 Baselines and Targets................................................................................. 5-1 Service Area Supplies........................................................................................................... 6-1 6.1 Water Resources......................................................................................... 6-1 6.2 Groundwater............................................................................................... 6-2 6.3 Surface Water............................................................................................. 6-2 6.4 Stormwater................................................................................................. 6-2 6.5 Wastewater and Recycled Water……………………………………………………………. 6-3 6.6 Desalinated Water Opportunities…………………………………………………………… 6-6 6.7 Exchanges or Transfers…………………………………………..............…......…..........6-6 6.8 Future Water Supplies……………………………………………………………………………. 6-7 6.9 Summary of Existing and Planned Sources of Water…………………...…………6-11 Water Service Reliability & Drought Risk Assessment…………………………………………………… 7-1 7.1 Reliability of Supply………………………………………………………………………………. 7-1 7.2 Projected Normal Water Year Assessment………………………………………….... 7-3 7.3 Projected Single Dry Year Assessment…………………………………………………... 7-4 7.4 Projected Multiple Dry Year Supply and Demand Comparison………………. 7-5 i OTAY WATER DISTRICT 2020 UWMP 7.5 Drought Risk Assessment………………………….……………………………….….………. 7-6 Water Shortage Contingency Plan………………………………………………………………………….….......8-1 Demand Management Measures………………………………………………………………………...………....9-1 9.1 Water Conservation Programs and Water Efficiency Practices...................9-1 Plan Adoption, Submittal, and Implementation…………………………………………………....…......10-1 10.1 Notice of Public Hearing.............................................................................10-1 10.2 Plan Submittal............................................................................................ 10-2 Appendices Appendix A Urban Water Management Plan Act Text Appendix B Adoption Resolution and Related Documentation Appendix C DWR 2020 UWMP Checklist Appendix D AWWA Water Loss Worksheet Appendix E City of San Diego Agreement for Otay WTP Appendix F City of San Diego Agreement for SBWRP Appendix G Water Authority Documentation of Supply Reliability Appendix H Water Shortage Contingency Plan Appendix I District Code of Ordinance Sect.39 Drought Response Conservation Program Appendix J Energy Intensity Calculations Appendix K Quantifying Regional Self-Reliance and Reduced Reliance on the Delta Watershed Appendix L DWR Standardized Tables Table(s) Table 2-1: Public Water Systems.......................................................................................... 2-1 Table 2-2: Plan Identification................................................................................................ 2-2 Table 2-3: Agency Identification........................................................................................... 2-2 Table 2-4: Water Supplier Information Exchange ................................................................ 2-3 Table 3-1: Population - Current and Projected..................................................................... 3-3 Table 3-2: Climate Data........................................................................................................ 3-4 Table 4-1: Demands for Potable Water – Actual.................................................................. 4-1 Table 4-S1: Summary of Unit Use Adjustment Factors........................................................ 4-3 Table 4-S2: District Anticipated Near-Term Annexations.................................................... 4-4 Table 4-2: Demands for Potable Water – Projected............................................................. 4-5 Table 4-3: Total Water Demands.......................................................................................... 4-5 ii OTAY WATER DISTRICT 2020 UWMP Table 4-4: Last Five Years of Water Loss Audit Reporting................................................... 4-6 Table 4-5: Inclusion in Water Use Projections..................................................................... 4-7 Table 4-6: Projected Future Conservation Savings – District................................................ 4-7 Table 5-1: Baselines and Targets Summary.......................................................................... 5-2 Table 5-2: SBX 7-7 Compliance............................................................................................. 5-2 Table 6-2: Wastewater Collected Within Service Area in 2015........................................... 6-3 Table 6-3: Wastewater Treatment and Discharge within Service Area in 2020................... 6-4 Table 6-4: Current and Projected Recycled Water Use within Service Area......................... 6-5 Table 6-5: 2015 UWMP Recycled Water Use Projection Compared to 2020 Actual............ 6-5 Table 6-6: Retail: Methods to Expand Future Recycled Water Use...................................... 6-6 Table 6-7: Expected Future Water Supply Projects or Programs.......................................... 6-8 Table 6-8: Water Supplies — Actual 2020...........................................................................6-11 Table 6-9: Water Supplies — Projected...............................................................................6-12 Table 7-1: Basis of Water Year Data..................................................................................... 7-2 Table 7-2: Normal Year Supply and Demand Assessment.................................................... 7-3 Table 7-3: Single Dry-Year Supply and Demand Assessment................................................ 7-4 Table 7-4: Multiple Dry Years Supply and Demand Comparison.......................................... 7-5 Table 7-S5: 2021-2025 Demand Projection Multipliers…………..……………………………..............7-6 Table 7-5: Five-Year Drought Risk Assessment………………………………………………………............7-7 Table 10-1: Notification to Cities and Counties...................................................................10-1 Figure(s) Figure 3-1. Water Service Area............................................................................................. 3-2 Figure 3-2. Temperature and Precipitation Distribution...................................................... 3-5 iii OTAY WATER DISTRICT 2020 UWMP Acronyms and Abbreviations 20x2020 20 percent reduction goal Act Urban Water Management Act AF acre-feet AFG accelerated forecasted growth AFY acre-feet per year AWE Alliance for Water Efficiency AWWA American Water Works Association CII Commercial, Industrial, and Institutional CIMIS California Irrigation Management Information System CRA California River Aqueduct Delta Sacramento-San Joaquin Delta District Otay Water District DMP Drought Management Plan DWR Department of Water Resources EIR Environmental Impact Report EIS Environmental Impact Statement ERP Emergency Response Plan ESP Emergency Storage Project ETo Evapotranspiration FY Fiscal Year GDP General Development Plan GHG greenhouse gas GIS geographical information system gpcd gallons per capita per day gpd gallons per day gpf gallons per flush gpm gallons per minute Guidebook Guidebook to Assist Urban Water Suppliers to Prepare a 2020 UWMP IID Imperial Irrigation District IRP Integrated Water Resources Plan kWh Kilowatt hour LMSE La Mesa-Sweetwater Extension LOPS Lower Otay Pump Station M & I Municipal & Industrial Master Plan District 2015 Water Facilities Master Plan Metropolitan Metropolitan Water District of Southern California

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