Recycled Water


Recycled Water
Central San has been producing recycled water since the 1970s.

Central San provides landscape irrigation water that meets all the requirements of the State Water Resources Control Board’s Division of Drinking Water and the San Francisco Regional Water Quality Control Board for unrestricted landscape irrigation. Approved uses include irrigation at schools, parks, playgrounds, median strips and playing fields, as well as dust control and industrial process uses.

Recycling water means less water is diverted from the Delta environment. Recycled water is a valuable resource, especially during drought years when water for landscape irrigation is less available because of water rationing.

Central San will continue to collaborate with local water purveyors to identify cost-effective landscape irrigation and industrial recycled water projects.  Additionally, Central San is exploring options to provide recycled water for landscape irrigation at the future Concord Naval Weapons Station development and industrial recycled water for cooling water purposes to the local petroleum refineries. 

Water Recycling Brochure


Residential Recycled Water Fill Station

The recycled water fill station is normally open Monday through Saturday from 7am to 2pm. If it is raining or forecasted to rain, please call 925-335-7717 for closure updates. 

Central San is offering its residential customers free recycled water. Recycled water can be used to hand-water lawns, gardens and landscaping. 

Recycled water should not be consumed or allowed to run off into storm drains.

(925) 335-7717

Commercial Recycled Water Truck Fill Program

Central San is pleased to offer recycled water to licensed contractors for construction uses to help conserve drinking water use in central Contra Costa County. Our Automated Commercial Fill Station is conveniently located off Imhoff Drive, East of our Treatment Plant. There is no charge for the first 100,000 gallons/customer/year.

Click on the link below for the application and more information:

Recycled Water Truck Fill Application

(925) 335-7738