SO SF SAN BRUNO WWTF - South San Francisco Wastewater Treatment Plant

SO SF SAN BRUNO WWTF is a municipal wastewater treatment facility located in South San Francisco, California, United States. It serves a population of approximately 105,307, placing it in the large agglomeration category. The plant is situated in San Mateo County, near the San Francisco Bay. As a US facility, the plant operates under the Clean Water Act and is regulated through the National Pollutant Discharge Elimination System (NPDES) permit program. For a plant of this scale, secondary treatment is typically required, with additional nutrient removal if discharging to sensitive waters. The designed capacity is reported as 1.00 (likely in million gallons per day or similar unit), indicating a substantial infrastructure. The plant's treated effluent discharges 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 plays a key role in protecting water quality in this sensitive coastal ecosystem.

The plant discharges into the San Francisco Bay, which is part of the larger San Francisco Bay-Delta estuary system. This estuary drains into the Pacific Ocean through the Golden Gate. The bay supports a rich ecosystem, including migratory birds, fish species like Chinook salmon and steelhead trout, and marine mammals. Protecting water quality is critical for maintaining this biodiversity and supporting recreational and commercial uses.