DEL REY WWTF - Del Rey, California Wastewater Treatment Plant

The DEL REY WWTF is a municipal wastewater treatment facility located in Del Rey, Fresno County, California. Serving a population of approximately 1,650, the plant is part of the region's infrastructure for managing domestic wastewater in an inland agricultural setting. The plant provides secondary treatment, a standard level required by the US Clean Water Act for municipal facilities. With a designed capacity of 1,135.62 thousand cubic meters and an annual discharge volume of 681.37 thousand cubic meters, the plant operates within its capacity. As a US facility, it is regulated under the National Pollutant Discharge Elimination System (NPDES) permit program, which sets effluent limits to protect water quality. The treated effluent is discharged to local waterways that ultimately drain into the San Joaquin River basin. This river system supports agricultural irrigation and provides habitat for aquatic species. The plant's operations help maintain water quality in the region, which is important for both ecological health and downstream water uses.

The plant discharges into the San Joaquin River watershed, which flows through California's Central Valley before reaching the Sacramento-San Joaquin Delta and San Francisco Bay. This region supports diverse aquatic life and is a critical migratory corridor for fish species. The plant's secondary treatment helps reduce nutrient and pollutant loads, protecting downstream water quality in an agriculturally intensive area.