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