On December 6, 2022, the State Water Resources Control Board (State Board) adopted a new General Order 2022-0103-DWQ, requiring all public agencies that own sanitary sewer collection systems greater than one mile in length to comply with the Statewide General Waste Discharge Requirements (WDRs) for Sanitary Sewer Systems. The WDRs are the regulatory standards for agencies that own or operate sanitary sewer collection systems that collect and/or convey untreated or partially treated wastewater to a publicly owned treatment facility. The objective of the WDRs is to reduce the frequency and volume of sanitary sewer spills (SSSs) by requiring cities to properly fund, operate, maintain, and manage their sewer collection system. The programs and plans to operate, maintain, and manage the entire wastewater collection system are adequately documented in what the WDRs refer to as a Sewer System Management Plan (SSMP).

The updated WDRs for public agencies went into effect beginning June 5, 2023. The new order requires each agency to adopt, certify, and upload its SSMP update to the online California Integrated Water Quality System (CIWQS) as well as making the SSMP available on the City’s website.

The State Board maintains records of all sanitary sewer overflows reported to them and publishes the information at SSS Incident Map | California State Water Resources Control Board.

The current SSMP is available for public review and inspection below or during regular business hours by contacting Miguel Medina, Utilities Operations and Maintenance Manager at (707) 469-6400. Submit comments to SSMP_Comments@CityofVacaville.com.

View the City of Vacaville City Council Resolution 2025-037 2025 Sewer System Management Plan approving and adopting the SSMP in compliance with the State Board requirements.