Pinole-Hercules Water Pollution Control Plant
Our Mission
To operate this facility to the highest standards and in a professional manner protecting the community and the environment.
The Pinole-Hercules Water Pollution Control Plant (WPCP) is located at the foot of Tennent Avenue in the City of Pinole.
History
The plant was originally built in 1955 as a primary treatment facility. Since then, it has had two major expansions and several modifications in order to meet the needs of these cities’ growing populations.
In 1972 the plant was upgraded from a primary to a secondary treatment facility, with a 2 MGD (million gallons per day) flow capacity. In 1985, the plant was again upgraded to handle a flow of 4.06 MGD. The plant serves a combined population of approximately 40,000, with an average daily flow of 3.5 million gallons.
In 2019, the City completed a full scale upgrade of nearly every treatment process. The construction was about $45 million and lasted over 1000 days.
The plant process (activated sludge) removes approximately 97% of the waste from the water. The water is then disinfected with hypochlorite. Once the disinfection process is complete, the hypochlorite is then removed and the water is pumped into the deep waters of San Pablo Bay.
All operators are certified by the state, grade levels vary from 1 through 5. Some plant personnel also hold certificates in maintenance and laboratory analysis.
Sanitary Sewer Overflow
To report sewage leaking or overflowing from a manhole in the street, please call the Public Works Department during normal business hours, 8:00 AM to 4:30 PM, at (510) 724-9010.
After hours and on weekends, please call the Pinole Police Department’s non-emergency phone number at (510) 724-1111.