Following the State Water Resources Control Board’s adoption of Statewide General Waste Discharge Requirement (GWDR) on May 2, 2006, wastewater collection systems became the last major component of the wastewater management system to be regulated by the State of California Treatment plants, including pretreatment programs, have been regulated for many years. The GWDR applies to all public collection system agencies in California that own or operate collection systems comprised of more than one mile of pipe or sewer lines that convey untreated wastewater to a publicly owned treatment facility, and requires each collection agency to prepare a Sewer System Management Plan (SSMP).

The City of Oroville Public Works Department has prepared a Final Draft SSMP dated October 30, 2009. The SSMP is a document that describes the management activities that the City intends to follow effectively manage its wastewater collection system and reduce sanitary sewer overflows (SSO’s). The SSMP includes eleven sections as listed below.

1. Collection system management goals.
2. Organization of personnel, including the chain of command and communications.
3. Legal authority for permitting flows into the system, inflow/infiltration control as well as enforcement of proper design, installation and testing standards, and inspection requirements for new and rehabilitated sewers.
4. Operations and maintenance activities to maintain the wastewater collection system.
5. Design and performance provisions.
6. Overflow emergency response plan.
7. Fats, oils and grease (FOG) control program.
8. System evaluation and capacity assurance program.
9. Monitoring, measurement and modifications plans for SSMP program effectiveness.
10. Periodic internal SSMP audits.
11. SSMP communication program.

The SSMP is proposed for adoption by the Oroville City Council on November 17, 2009. The Public Works Department is inviting public comments on the SSMP.

You can click the links below to review the City’s SSMP and the State GWDR’s.

• Final SSMP 2019
• Statewide General Waste Discharge Requirements for Sanitary Sewer Systems

If you have any questions or comments about the SSMP or the City’s existing sewer system management program, you can contact the Public Works Department at (530) 538-2401. You can also find more information on the State’s SSMP regulations at:

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