Chico WPCP Wastewater Treatment Plant, Chico, California

Chico WPCP is a municipal wastewater treatment facility located in Chico, California, serving a population of about 88,900. The plant is situated in Butte County, within the Sacramento Valley, and is part of the region's critical water infrastructure. As a medium-to-large agglomeration, the plant operates under the U. S. Clean Water Act, which requires secondary treatment as a baseline for municipal wastewater plants. The National Pollutant Discharge Elimination System (NPDES) permits, issued by the California State Water Resources Control Board, govern discharge limits to protect water quality. The treated effluent from Chico WPCP is discharged into the Sacramento River watershed, which flows south through the Central Valley and ultimately into the San Francisco Bay and the Pacific Ocean. The plant plays a key role in protecting downstream aquatic ecosystems and maintaining water quality in the Sacramento River basin.

Chico WPCP discharges into the Sacramento River watershed, which drains the northern Central Valley. The Sacramento River is a major waterway supporting diverse aquatic life, including salmon and steelhead trout. The river flows into the Sacramento-San Joaquin Delta and San Francisco Bay, an ecologically sensitive estuary. The plant's operations help protect these downstream environments from nutrient pollution and pathogens.