Central Contra Costa Sanitary District
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Aerial image of CCCSD facilities.

Treatment Plant

Opened in 1948 and upgraded several times in its 60+ year history, the Central Contra Costa Sanitary District Treatment Plant treats an average of approximately 35.6 million gallons of wastewater per day generated in a 144-square mile area by approximately 476,400 residents and more than 3,000 businesses.

Located in Martinez, the plant has a treatment capacity of 54 million gallons per day (mgd) and 240 mgd of wet weather flow. The Plant Operations Building houses the Control Center, a state-of-the-art computerized system that monitors and controls every phase of the treatment process. The facility is staffed 24 hours a day, 365 days a year.

Wastewater moves through the District’s 1,500 miles of sewer lines, finally arriving at the plant’s headworks to begin treatment. Most of the wastewater is treated to a secondary level, disinfected by ultraviolet light, and then discharged into Suisun Bay. Approximately 600 million gallons per year are treated to a tertiary level through additional filtration and disinfection before being distributed as Recycled Water for landscape irrigation, industrial processes, and plant operations.

Watch Follow the Flow, a video of the wastewater treatment process at CCCSD.

Watch From Waste to Worth, a video on how CCCSD uses biosolids to create energy.

View the Follow the Flow Brochure - CCCSD's Waste Water Treatment Process Download PDF 

The CCCSD Treatment Plant recently received the National Association of Clean Water Agencies (NACWA) Platinum Award for its 17th year of complete compliance with all Federal and State regulations.