For Utilities Commission Meeting May 19, 2026
TO: Honorable Chairperson and Commission
APPROVAL: Yazdan Emrani, P.E., Director of Public Works
FROM: Nicole Hemmans, Senior Administrative Analyst
Title
Request for the Cable Advisory and Utilities Commission to Recommend the City Council/Rialto Utility Authority Board Conduct a Public Hearing to Consider Adopting the 2025 Upper Santa Ana River Integrated Regional Urban Water Management Plan Comprised of the Urban Water Management and the Water Shortage Contingency Plans. (ACTION)
Body
RECOMMENDATION
Staff requests that the Cable Advisory and Utilities Commission recommend that the City Council/RUA Board conduct a Public Hearing to consider adopting the 2025 Upper Santa Ana River Integrated Regional Urban Water Management Plan comprised of the Urban Water Management and the Water Shortage Contingency Plans.
BACKGROUND
California Water Code Section 10621(a) requires urban water suppliers to update their Urban Water Management Plan (UWMP) at least once every five (5) years, with the 2025 UWMP due to the California Department of Water Resources (DWR) by July 1, 2026.
As previously presented to the Water Subcommittee on March 27, 2025, the City of Rialto participated in a regional UWMP effort led by San Bernardino Valley in coordination with multiple regional water agencies. This regional approach allows participating agencies to streamline costs, share data, and ensure consistency across water supply planning efforts.
Water Systems Consulting, Inc. (WSC) was selected through a regional Request for Proposals (RFP) process to prepare the 2025 UWMP.
Since that time, staff and the consultant team have worked collaboratively to complete the required updates, incorporating current water supply data, demand projections, regulatory requirements, and long-term planning assumptions.
ANALYSIS/DISCUSSION
The Final 2025 UWMP has now been completed and includes updated information related to:
v Water supply reliability under normal, single-dry, and multiple-dry year scenarios
v Water demand projections and population growth assumptions
v Water shortage contingency planning
v System reliability and infrastructure considerations
v Compliance with State requirements, including water use efficiency standards
The UWMP serves as a critical long-range planning document that demonstrates the City’s ability to meet current and future water demands while maintaining compliance with State regulations.
As required by the Urban Water Management Planning Act, the City must conduct a public hearing prior to adoption of the UWMP. The purpose of the public hearing is to provide an opportunity for community input and to ensure transparency in the City’s water supply planning process.
Staff is preparing to bring the Final 2025 UWMP to the City Council/Rialto Utility Authority Board for consideration of adoption. Timeline is as follows:
ü Set a public hearing date -Tuesday, May 12, 2026
Ø Conduct the required public hearing - Tuesday, June 23, 2026
Ø Submission to the State - Wednesday, July 1, 2026
This item was presented to the Water Subcommittee on April 30, 2026. The Water Subcommittee’s feedback was to advance this item to the Cable Advisory and Utilities Commission for recommendation to the City Council.
FINANCIAL IMPACT
The proposed action of adopting the Plan does not impose any additional financial obligations on the City of Rialto.
ATTACHMENTS
Attachment 1 - Regional Context
Attachment 2 - Rialto UWMP
Attachment 3 - Regional Appendices
Attachment 4 - Rialto UWMP Appendices
Attachment 5 - Rialto WSCP Appendices
Attachment 6 - Regional Executive Summary
Due to the size of the attachments associated with this item, the supporting documents can be accessed electronically through the link provided below:
https://www.rialtoca.gov/1017/2025-Draft-Urban-Water-Management-Plan <https://gcc02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.rialtoca.gov%2F1017%2F2025-Draft-Urban-Water-Management-Plan&data=05%7C02%7Cnhemmans%40rialtoca.gov%7Cf5fba60b6e0f4785d13b08deb21d0363%7Cc26f6cb112a94bd28e486fbb34e50501%7C1%7C0%7C639144034866589467%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=SZ%2BzXhXKaAujYqrVa41B8efnzx%2FFfxXV6gY%2FZI71DKI%3D&reserved=0>