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1 RiversideCA.gov
1 RiversideCA.gov
2023-2024 ANNUAL WATER SUPPLY
AND DEMAND ASSESSMENT
City Council
June 6, 2023
Public Utilities Department
RiversideCA.gov
2 1. The California Water Code Section 10632.1 requires an Annual Assessment and Annual Shortage Report to the California Department of Water Resources (DWR) by July 1 of each year.
2. The Board of Public Utilities approved, and the City Council adopted on May 23, 2022, and on June 14, 2022, respectively.
3. The assessment and report are based on the procedures and recommendations provided by the DWR.
4. Final guidance documents were published in April 2022.
BACKGROUND
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3 The purpose of the Annual Assessment is to:
1.Evaluate Water Agencies on their water supply
reliability for the current year and including one dry
year.
2.Generate and submit an Annual Shortage Report on
the Annual Assessment and results regarding their
anticipated shortages to DWR by July 1 every year
starting July 1, 2022.
BACKGROUND
RiversideCA.gov
4 Riverside’s Available Water Supply Projection in 2023-2024:
1. The Annual Assessment reflects the available water supply from groundwater extraction rights (85,773 acre feet per year), as shown on the next slide.
2. Considers the available capacity from groundwater supply wells during high demand and conveyance capability.
3. An agreement with Western Mu nicipal Water District (WMWD) provides access to 21,700 acre feet per year (AFY) of imported water.
4. Recycled water for non-potable uses meets the need of up to 800 AFY
DISCUSSION
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5 CURRENT WATER SUPPLIES
Bunker Hill
• 55,263 AFY Export
Colton
• 2,728 AFY Export
Riverside North
• 10,902 AFY Export
Riverside South
• 16,880 AFY Extraction
Extraction/Export Rights
85,773 AFY Total
RiversideCA.gov
6 PROJECTED WATER SUPPLIES
23/24
Water supply Additional Detail on Water Supply Reasonably Available Volume Groundwater Bunker Hill 55,263
Groundwater Riverside North 10,902
Groundwater Riverside South 16,880
Groundwater Rialto- Colton 2,728
Recycled water RWQCP 800
Purchased or
imported water From WMWD 21,700
Total: 108,273
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7 ACTUAL CUSTOMER WATER USE
t
t
RiversideCA.gov
8 Estimation of the total potable and non-potable monthly water demand projections from July 2023 to June 2024 :
1. By adding all the next year’s projected water needs
for all demand categories and a 15% reduction per
RPU WSCP stage 2 as requested by DWR.
2. Considering the monthly projected weather and
growth.
RIVERSIDE’S WATER DEMAND IN 2022 AND 2023
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9 PROJECTED WATER SUPPLY VS. WATER DEMAND
0 2,000
4,000
6,000
8,000
10,000
12,000
14,000
Jul-23 Aug-23 Sep-23 Oct-23 Nov-23 Dec-23 Jan-24 Feb-24 Mar-24 Apr-24 May-24 Jun-24 Acre Feet
Supply projection Supply projection without purchasing
Projected potable demand Anticipated projected potable demand+15% reduction As of 2023, RPU can meet all current demands with local groundwater supplies and with available groundwater capacity during the high demand season.
RiversideCA.gov
10 Status Completion of RPU’s AWSDA Required Submittal
REQUIRED SUBMITTALS TO DWR FOR THE AWSDA
Report Topic
Table 1 Annual Assessment Information
Table 2 Key Data - Demands, containing estimated unconstrained demand from July – June of next year
Table 3 Key Data - Supplies, containing estimated available supplies from July – June of next year
Table 4 Annual Water Shortage Assessment, showing a summary of monthly supply/demand balances and shortages and results of planned actions.
Table 5 Planned Water Shortage Response Actions, containing information on planned water shortage response actions (if any)
RPU
Methodology
Optional attachments to include details on implementing the procedures that took place this year. Information may consist of descriptions of the steps followed, data sources considered, methodologies used, and the decision-making process 9 10
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11 Priority No. 4 Environmental Stewardship
Goal No. 4.2 – Sustainably manage local water resources to maximize reliability and advance water reuse to ensure safe, reliable, and affordable water to our community.
Cross-Cutting Threads
STRATEGIC PLAN ALIGNMENT
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12 That the City Council receive and adopt Riverside’s 2023- 2024 Annual Water Supply and Demand Assessment.
RECOMMENDATION
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