Brentwood WWTP - Pleasant Hill, California Wastewater Treatment Plant

Brentwood WWTP is a municipal wastewater treatment facility serving the community of Pleasant Hill in Contra Costa County, California. With a population served of around 53,194, the plant is part of the region's essential water infrastructure, handling domestic and commercial wastewater from the area. As a medium-sized agglomeration, the plant is subject to the U.S. Clean Water Act and National Pollutant Discharge Elimination System (NPDES) permitting requirements. Plants of this scale typically employ secondary treatment as a minimum standard, with potential for advanced treatment depending on local discharge requirements. The plant's treated effluent ultimately drains into the Sacramento-San Joaquin River Delta, a critical estuarine ecosystem that flows into San Francisco Bay and the Pacific Ocean. This watershed supports diverse aquatic life and is an important migratory corridor for fish species.

The plant's discharge contributes to the Sacramento-San Joaquin River Delta, a vast estuarine system that empties into San Francisco Bay and the Pacific Ocean. This watershed is ecologically sensitive, supporting diverse aquatic habitats and serving as a critical migration route for anadromous fish. The proximity to the coast (within 50 km) underscores the importance of effective treatment to protect downstream marine environments.