Contact Information
Marc Sulik
Wastewater Treatment Manager
4827 Chico River Road
Chico, CA 95928
Office (530) 894-4300
Permit Applications
Sewer Overflow Reporting
If you witness a sewer overflow, report it here.
Water Pollution Control Plant (WPCP)
The City of Chico operates and maintains a modern 12 MGD capacity, secondary treatment, activated sludge, wastewater treatment plant with future expandability to 15 MGD capacity. The plant operates under strict waste discharge requirements permitted by the California Water Resources Control Board. The discharge location for 
the treated wastewater (effluent) is the Sacramento River. The WPCP runs a State certified, full environmental laboratory for daily testing of the plant effluent to ensure that its quality meets State standards.
The Chico Industrial Pretreatment Program (CIPP) is located at the WPCP. The CIPP program permits and controls wastewater discharges from businesses and industry that could potentially be harmful if allowed to be discharged into the environment. To obtain a copy of a wastewater discharge application/permit, please see the permit applications on the right hand side of this page.
The WPCP operations staff operate and maintain twelve sewer lift pump stations that pump wastewater from areas in the City that do not have the ability to gravity flow to the City wastewater collection system.
The WPCP operates a 1.1 Megawatt, Solar Photovoltaic facility provides electric power to the WPCP, which reduces the plant use of utility power by approximately 35%. This solar facility is one of the largest in the nation to be installed at a wastewater treatment plant.
Also a new 335-kilowatt co-generator is on site that uses methane produced in the plant process as a fuel source to produce electricity which is used at the WPCP. If you have any questions regarding wastewater issues, please contact Marc Sulik msulik@ci.chico.ca.us or call the WPCP at (530) 894-4300.