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1 RiversideCA.gov1
RiversideCA.gov
2026-2027 ANNUAL WATER SUPPLY AND DEMAND ASSESSMENTCity Council May 5, 2026 Riverside Public Utilities RiversideCA.gov2
1. California Water Code Section 10632.1 requires urban water suppliers to prepare an AWSDA and submit an Annual Shortage Report to DWR by July 1 each year, beginning in 20222. The assessment and report are based on the procedures and recommendations provided by the DWR3. Final guidance documents were published in April 2022, followed by the publication of a Guidance addendum on May 10, 2023, and updates released on April 23, 2024.BACKGROUND1 2 4/23/2026
2 RiversideCA.gov3
Purpose of the Annual Assessment:1. Evaluate Water Agencies on their water supply reliability for the current year and including one dry year2. Generate and submit an Annual Shortage Report on the Annual Assessment and results every year regarding their anticipated shortages to DWR by July 1BACKGROUND RiversideCA.gov4
Riverside’s Available Water Supply Projection in 2026-2027:1. The Annual Assessment reflects the available water supply from groundwater extraction rights, as shown on the next slide2. Considers the available capacity from groundwater supply wells during high demand and conveyance capability3. An agreement with Western Municipal Water District (WMWD) provides access to 21,700 acre feet per year (AFY) of imported water4. Recycled water for non-potable uses that meets the need of up to 800 AFY5. RPU has access to additional groundwater supplies through the City’s various storage accountsDISCUSSION3 4 4/23/2026
3 RiversideCA.gov5
CURRENT WATER RIGHTS SUPPLIESExtraction/Export RightsBunker Hill55,263 AFY ExportColton 2,728 AFY ExportRiverside North10,902 AFY Export Riverside South16,880 AFY Extraction85,773 AFY Total
RiversideCA.gov6
Riverside’s Water Supply ProjectionsReasonably Available VolumeAdditional Detail on Water SupplyWater supply55,263Bunker HillGroundwater10,902Riverside NorthGroundwater16,880Riverside SouthGroundwater2,728Rialto-ColtonGroundwater800RWQCPRecycled water21,700From WMWDPurchased or imported water108,273Total:Fiscal Year 26/275 6 4/23/2026
4 RiversideCA.gov7
ACTUAL CUSTOMER WATER USE2025202420232022202174,77071,59266,84081,48181,946Potable and Non-Potable (AF)164166155206174Recycled Water (AF)74,93471,75866,99681,68782,120Total Water Use (AF) RiversideCA.gov8
Estimation of the total potable and non-potable monthly water demand projections from July 2026 to June 2027: 1. By adding all the next year’s projected water needs for all demand categories2. Considering the monthly projected weather and growthRIVERSIDE’S WATER DEMAND PROJECTIONS7 8 4/23/2026
5 RiversideCA.gov9
PROJECTED WATER SUPPLY VS. WATER DEMAND As of 2026, RPU can meet all current demands with local groundwater supplies and with availablegroundwater capacity during the high demand season.020,00040,00060,00080,000100,000120,000Jul-26 Aug-26 Sep-26 Oct-26 Nov-26 Dec-26 Jan-27 Feb-27 Mar-27 Apr-27 May-27 Jun-27Acre FeetSupply projectionSupply Projection without PurchasingProjected Cumulative Demand RiversideCA.gov10
Status Completion of RPU’s AWSDA Required SubmittalREQUIRED SUBMITTALS TO DWR FOR THE AWSDA Annual Water Supply and Demand Assessment Report TopicCompletedAnnual Assessment InformationTable 1CompletedKey Data – Demands, containing estimated unconstrained demand from July – June of next yearTable 2CompletedKey Data – Supplies, containing estimated available supplies from July –June of next yearTable 3CompletedAnnual Water Shortage Assessment, showing a summary of monthly supply/demand balances as well as shortages and results of planned actionsTable 4CompletedPlanned Water Shortage Response Actions, containing information on planned water shortage response actions (if any)Table 5CompletedOptional attachments to include details on the implementation of the procedures that took place this year. Information may include descriptions of the steps followed, data sources considered, methodologies used, and the decision-making process.RPU Methodology9 10 4/23/2026
6 RiversideCA.gov11
That the City Council receive and adopt Riverside’s2026-2027 Annual Water Supply and DemandAssessment.RECOMMENDATION11