2020 URBAN WATER MANAGEMENT PLAN JUNE 2021 Cucamonga Valley Water District 2020 Urban Water Management Plan JUNE 2021 TABLE OF CONTENTS Page ......................................................................................................................... 1-1 URBAN WATER MANAGEMENT PLAN INTRODUCTION AND OVERVIEW ............................... 1-1 RECOMMENDED UWMP ORGANIZATION ....................................................................... 1-3 UWMPS IN RELATION TO OTHER EFFORTS ...................................................................... 1-4 UWMPS AND GRANT OR LOAN ELIGIBILITY ..................................................................... 1-4 DEMONSTRATION OF CONSISTENCY WITH THE DELTA PLAN FOR PARTICIPANTS IN COVERED ACTIONS ...................................................................................................... 1-4 TIPS FOR UWMP PREPARERS ........................................................................................... 1-6 ......................................................................................................................... 2-1 PLAN PREPARATION ........................................................................................................... 2-1 PLAN PREPARATION ......................................................................................................... 2-1 BASIS FOR PREPARING A PLAN ........................................................................................ 2-2 PUBLIC WATER SYSTEMS .................................................................................... 2-3 SUPPLIERS SERVING MULTIPLE SERVICE AREAS / PUBLIC WATER SYSTEMS .............................................................................................................. 2-3 REGIONAL PLANNING ...................................................................................................... 2-4 INDIVIDUAL OR REGIONAL PLANNING AND COMPLIANCE ............................................. 2-4 REGIONAL UWMP ............................................................................................... 2-5 REGIONAL ALLIANCE ........................................................................................... 2-6 FISCAL OR CALENDAR YEAR AND UNITS OF MEASURE .................................................... 2-6 FISCAL OR CALENDAR YEAR ................................................................................ 2-6 REPORTING COMPLETE 2020 DATA .................................................................... 2-7 UNITS OF MEASURE ............................................................................................ 2-7 COORDINATION AND OUTREACH .................................................................................... 2-8 WHOLESALE AND RETAIL COORDINATION ......................................................... 2-8 COORDINATION WITH OTHER AGENCIES AND THE COMMUNITY ..................... 2-9 NOTICE TO CITIES AND COUNTIES ...................................................................... 2-9 ......................................................................................................................... 3-1 SYSTEM DESCRIPTION ........................................................................................................ 3-1 GENERAL DESCRIPTION .................................................................................................... 3-2 SERVICE AREA BOUNDARY MAPS .................................................................................... 3-2 SERVICE AREA CLIMATE ................................................................................................... 3-5 SERVICE AREA POPULATION AND DEMOGRAPHICS ........................................................ 3-7 SERVICE AREA POPULATION ............................................................................... 3-7 OTHER SOCIAL, ECONOMIC, AND DEMOGRAPHIC FACTORS ............................. 3-9 LAND USES WITHIN SERVICE AREA .................................................................................. 3-9 i TABLE OF CONTENTS (Continued) Page ......................................................................................................................... 4-1 WATER USE CHARACTERIZATION ........................................................................................ 4-1 NON-POTABLE VERSUS POTABLE WATER USE ................................................................ 4-1 PAST, CURRENT, AND PROJECTED WATER USES BY SECTOR ........................................... 4-2 WATER USE SECTORS LISTED IN WATER CODE ................................................... 4-6 WATER USE SECTORS IN ADDITION TO THOSE LISTED IN WATER CODE ............ 4-7 PAST WATER USE ................................................................................................ 4-7 DISTRIBUTION SYSTEM WATER LOSS .................................................................. 4-8 CURRENT WATER USE ....................................................................................... 4-10 PROJECTED WATER USE .................................................................................... 4-11 CHARACTERISTIC FIVE-YEAR WATER USE ......................................................... 4-13 WORKSHEETS AND REPORTING TABLES ........................................................................ 4-13 OPTIONAL PLANNING TOOL USE ANALYSIS WORKSHEET ................................ 4-14 DWR 2020 UWMP SUBMITTAL TABLES ............................................................ 4-14 WATER USE FOR LOWER INCOME HOUSEHOLDS .......................................................... 4-14 CLIMATE CHANGE CONSIDERATIONS ............................................................................ 4-15 ......................................................................................................................... 5-1 SB X7-7 BASELINES, TARGETS, AND 2020 COMPLIANCE ....................................................... 5-1 GUIDANCE FOR WHOLESALE SUPPLIERS ......................................................................... 5-2 SB X7-7 FORMS AND SUMMARY TABLES ......................................................................... 5-2 SB X7-7 VERIFICATION FORM (BASELINES AND TARGETS) ................................. 5-3 SB X7-7 COMPLIANCE FORM .............................................................................. 5-3 SUBMITTAL TABLES 5-1 AND 5-2 ........................................................................ 5-3 REGIONAL UWMP/REGIONAL ALLIANCE ............................................................ 5-4 BASELINE AND TARGET CALCULATIONS FOR 2020 UWMPS ........................................... 5-5 SUPPLIER SUBMITTED 2015 UWMP, NO CHANGE TO SERVICE AREA ................ 5-5 METHODS FOR CALCULATING POPULATION AND GROSS WATER USE ........................... 5-6 SERVICE AREA POPULATION ............................................................................... 5-6 GROSS WATER USE ............................................................................................. 5-7 2020 COMPLIANCE DAILY PER CAPITA WATER USE (GPCD) ............................................ 5-8 2020 ADJUSTMENTS FOR FACTORS OUTSIDE OF SUPPLIER’S CONTROL ............ 5-8 SPECIAL SITUATIONS ........................................................................................... 5-9 IF SUPPLIER DOES NOT MEET 2020 TARGET ....................................................... 5-9 REGIONAL ALLIANCE ........................................................................................................ 5-9 ......................................................................................................................... 6-1 WATER SUPPLY CHARACTERIZATION .................................................................................. 6-1 WATER SUPPLY ANALYSIS OVERVIEW ............................................................................. 6-2 SPECIFIC ANALYSIS APPLICABLE TO ALL WATER SUPPLY SOURCES .................... 6-4 OTHER CHARACTERIZATION CONSIDERATIONS ................................................. 6-5 ii TABLE OF CONTENTS (Continued) Page OPTIONAL PLANNING TOOL ............................................................................... 6-5 NARRATIVE SECTIONS FOR SUPPLIER’S UWMP WATER SUPPLY CHARACTERIZATION ........................................................................................................ 6-6 PURCHASED OR IMPORTED WATER ................................................................... 6-6 GROUNDWATER ................................................................................................. 6-8 SURFACE WATER ............................................................................................... 6-22 STORMWATER .................................................................................................. 6-25 WASTEWATER AND RECYCLED WATER............................................................. 6-25 DESALINATED WATER OPPORTUNITIES ............................................................ 6-36 WATER EXCHANGES AND TRANSFERS .............................................................. 6-37 FUTURE WATER PROJECTS ................................................................................ 6-38 SUMMARY OF EXISTING AND PLANNED SOURCES OF WATER ......................... 6-39 SPECIAL CONDITIONS ........................................................................................ 6-42 SUBMITTAL TABLES COMPLETION USING THE OPTIONAL PLANNING TOOL ...............