Amador Water Agency 2015 Urban Water Management Plan Prepared by: RMC Water and Environment Amador Water Agency June 2016 Amador Water Agency 2015 Urban Water Management Plan Table of Contents Table of Contents Chapter 1 Introduction and Overview .................................................................................1-1 1.1 Overview ...............................................................................................................1-1 1.2 UWMP Organization ..............................................................................................1-2 Chapter 2 Plan Preparation ..................................................................................................2-1 2.1 Basis for Preparing a Plan .....................................................................................2-1 2.2 Regional Planning .................................................................................................2-1 2.3 Individual or Regional Planning and Compliance ...................................................2-2 2.4 Fiscal or Calendar Year and Units of Measure ......................................................2-2 2.5 Coordination and Outreach ....................................................................................2-3 Chapter 3 System Description .............................................................................................3-1 3.1 General Description ...............................................................................................3-1 3.2 Service Area Boundary Maps ................................................................................3-3 3.3 Service Area Climate .............................................................................................3-4 3.4 Service Area Population and Demographics ..........................................................3-6 Chapter 4 System Water Use ...............................................................................................4-1 4.1 Water Uses by Sector ............................................................................................4-1 4.2 Distribution System Water Losses .........................................................................4-5 4.3 Water Savings from Codes, Standards, or Transportation and Land Use Plans ....4-6 4.4 Water Use for Lower Income Households..............................................................4-6 4.5 Climate Change Impacts to Water Demand ...........................................................4-6 Chapter 5 SB X7-7 Baselines and Targets ..........................................................................5-1 5.1 Updating Calculations from 2010 UWMP ...............................................................5-1 5.2 2015 Compliance ...................................................................................................5-5 5.3 R-GPCD ................................................................................................................5-7 Chapter 6 System Supplies ..................................................................................................6-1 6.1 Purchased or Imported Water ................................................................................6-1 6.2 Groundwater ..........................................................................................................6-1 6.3 Surface Water .......................................................................................................6-3 6.4 Stormwater ............................................................................................................6-4 6.5 Wastewater and Recycled Water ...........................................................................6-4 6.6 Desalinated Water ...............................................................................................6- 13 6.7 Exchange or Transfer Opportunities ....................................................................6- 13 6.8 Future Water Projects ..........................................................................................6- 13 6.9 Summary of Existing and Planned Sources of Water ...........................................6- 16 6.10 Climate Change Impacts to Supply ......................................................................6- 19 Chapter 7 Water Supply Reliability Assessment ................................................................7-1 7.1 Constraints on Water Sources ...............................................................................7-1 7.2 Reliability by Type of Year .....................................................................................7-2 7.3 Supply and Demand Assessment ..........................................................................7-3 7.4 Regional Supply Reliability ....................................................................................7-4 Chapter 8 Water Shortage Contingency Planning ..............................................................8-1 8.1 Stages of Action ....................................................................................................8-1 8.2 Prohibitions on End Uses ......................................................................................8-1 8.3 Penalties, Charges, Other Enforcement of Prohibitions .........................................8-4 8.4 Consumption Reduction Methods ..........................................................................8-5 8.5 Determining Water Shortage Reductions ...............................................................8-6 8.6 Revenue and Expenditure Impacts ........................................................................8-6 8.7 Resolution or Ordinance ........................................................................................8-6 8.8 Minimum Supply Next Three Years .......................................................................8-7 June 2016 i Amador Water Agency 2015 Urban Water Management Plan List of Tables Chapter 9 Demand Management Measures ........................................................................9-1 9.1 Conservation Measure Organization ......................................................................9-1 9.2 DMM Categories....................................................................................................9-2 Chapter 10 Plan Adoption, Submittal, and Implementation ...............................................10 -1 List of Tables Table 2-1: Public Water Systems (DWR Table 2-1) ............................................................. 2-1 Table 2-2: Plan Identification (DWR Table 2-2) .................................................................... 2-2 Table 2-3: Agency Identification (DWR Table 2-3) .............................................................. 2-3 Table 2-4: Water Supplier Information Exchange (DWR Table 2-4) ................................... 2-4 Table 2-5: Coordination with Appropriate Agencies (Optional) ......................................... 2-4 Table 3-1: Climate (Optional) ................................................................................................ 3-5 Table 3-2: Population - Current and Projected (DWR Table 3-1) ........................................ 3-7 Table 4-1: Past Water Demand (Optional) ........................................................................... 4-2 Table 4-2: Demands for Potable and Raw Water – Actual (DWR Table 4-1) ...................... 4-2 Table 4-3: Average Water Use per Connection (Optional) ................................................. 4-3 Table 4-4: Projected Number of Agency Service Connections (Optional) ........................ 4-4 Table 4-5: Demands for Potable and Raw Water - Projected (DWR Table 4-2) ................. 4-5 Table 4-6: Total Water Demands (DWR Table 4-3) .............................................................. 4-5 Table 4-7: 12 Month Water Loss Audit Reporting (DWR Table 4-4) ................................... 4-6 Table 4-8: Inclusion in Water Use Projections (DWR Table 4-5) ........................................ 4-6 Table 5-1: Baseline Period Ranges (SB X7-7 Table-1) ........................................................ 5-2 Table 5-2: Gallons Per Capita Per Day (GPCD) (SB X7-7 Table 5) ..................................... 5-4 Table 5-3: Baselines and Targets Summary (DWR Table 5-1)............................................ 5-5 Table 5-4: 2015 Compliance (DWR Table 5-1) ..................................................................... 5-6 Table 6-1: Historic Groundwater Levels in Cosumnes Subbasin (Optional) .................... 6-2 Table 6-2: Groundwater Volume Pumped (DWR Table 6-1) ............................................... 6-3 Table 6-3: Wastewater Collected Within Service Area in 2015 (DWR Table 6-2)............... 6-7 Table 6-4: Wastewater Treatment and Discharge Within Service Area in 2015 (DWR Table 6-3) ................................................................................................................................. 6-8 Table 6-5: 2010 UWMP Recycled Water Use Projection Compared to 2015 Actual (DWR Table 6-5) ....................................................................................................................... 6-9 Table 6-6: Current and Projected Recycled Water Direct Beneficial Uses Within Service Area (DWR Table 6-4) .................................................................................................. 6-11 Table 6-7: Methods to Expand Future Recycled Water Use (DWR Table 6-6) ................. 6-13 Table