The Town of Discovery Bay operates two wastewater treatment plants.  Both plants are located on the eastern border of town.

The two plants provide state of the art wastewater treatment facilities in compliance with permits issued to the Town by the state of California for the treatment and discharge of wastewater. 

Both plants have recently undergone a major capital investment program to ensure that the processes will continue to serve the community for years to come.

In 2014 the state of California required that the Town’s wastewater be treated to Title 22 waste discharge requirements.  This requirement will result in an additional capital investment by the Town to construct these necessary facilities.  When completed in 2019, the Town will have “purple pipe” capabilities, meaning treated wastewater water can be used for irrigation purposes.

While extremely rare, if you suspect that there is a Sanitary Sewer Overflow, or SSO, in your neighborhood, please contact us immediately.  We do not want raw waste to enter into the storm drain system, polluting Delta waterways.  Most likely water will be seeping from a sewer manhole cover in the street.

If you need to call after hours to report a SSO or another problem, please contact our preferred vendor Veolia Water at (925) 634-8818 immediately.  There are on call 24/7.  The Town can be reached during daytime hours at (925) 634-1131.

Currently, the District operates:

• Two (2) wastewater treatment facilities that treat an average of 1.8 million gallons of wastewater per day.
• Fifteen (15) wastewater lift stations that transport/move the raw wastewater to the main wastewater treatment facility.
• Sixty (60) miles of sewer mains.

Our water and wastewater facilities are operated and maintained by Veolia Water under a multi-year contract. Also, the District has a partnership with the University of California, Berkeley on a multi-year “Wetlands” Trial Project to remove pharmaceuticals, salinity (salt) and certain metals from our wastewater.