San Mateo WWTF - Wastewater Treatment Plant in San Mateo, California

The San Mateo Wastewater Treatment Facility (WWTF) is a municipal treatment plant located in San Mateo, California, serving a population of around 145,044. Situated in the San Francisco Bay Area, the plant is part of the region's critical water infrastructure, managing wastewater from residential and commercial sources. As a facility serving over 100,000 people, the plant is classified as a large agglomeration under U. S. regulatory frameworks. It operates under the Clean Water Act, which mandates secondary treatment as a minimum for municipal plants, with National Pollutant Discharge Elimination System (NPDES) permits issued by the California State Water Resources Control Board. The designed capacity is 1.00 million gallons per day, indicating the plant's scale. The treated effluent is discharged into the San Francisco Bay, a major estuary that connects to the Pacific Ocean. The bay supports diverse aquatic life, including fish, birds, and marine mammals, and is an important ecological and economic resource. The plant's operations are crucial for protecting water quality in this sensitive coastal environment.

The San Mateo WWTF discharges into the San Francisco Bay, a large estuary that receives freshwater from the Sacramento and San Joaquin rivers and flows into the Pacific Ocean through the Golden Gate. The bay supports a rich ecosystem, including migratory birds, fish species, and marine mammals. Protecting water quality is essential for maintaining the health of this ecologically sensitive area, which is subject to nutrient pollution and habitat degradation pressures.