Wastewater Treatment

The Wastewater Operations Division provides for the operation, maintenance, repair, and capital improvements of the Wastewater Treatment Plant and collection and discharge systems. The treatment plant operates under a National Pollutant Discharge Elimination System (NPDES) permit issued by the San Francisco Regional Water Quality Control Board and has a permitted dry weather capacity of 4.5 million gallons per day and a wet weather capacity of 11 million gallons per day.

There are over four hundred major plant process equipment components that endure a severe duty cycle including corrosive gases, abrasive liquids, and continuous operation. The collection system consists of 23 lift stations, approximately 153 miles of sewer pipelines, a 3-mile wet weather relief (interceptor) pipeline, and 6 wet weather control structures. The discharge system consists of a 1,100-foot long outfall pipeline and a 150-foot long outfall diffuser pipeline.

Additional responsibilities include the implementation of environmental programs mandated by enumerable state and federal statutes and an environmental laboratory providing process control and regulatory monitoring.

Sanitary Sewer Overflow (SSO) Reports

Click on the link below to access the interactive SSO Report database.  This database, known as the California Integrated Water Quality System (CIWQS), is used by the State Water Resources Control Board to track information.  Sewage discharge information, such as date, address and volume, can be accessed here. 
The RV dump station located at the Benicia Wastewater Treatment Plant is closed until further notice due to construction within the plant. We apologize for the inconvenience.