Selma Kingsburg Fowler CSD WWTF - Fresno County, California Wastewater Treatment

Selma Kingsburg Fowler CSD WWTF is a municipal wastewater treatment facility located in Fresno County, California, serving a population of approximately 32,622. The plant is part of the regional wastewater infrastructure for the communities of Selma, Kingsburg, and Fowler. As a facility in California, it operates under the jurisdiction of the US Environmental Protection Agency and the California State Water Resources Control Board, which enforce the Clean Water Act and state-specific water quality standards. The plant's scale places it in a category that typically requires secondary treatment under federal regulations. The California Water Code mandates advanced treatment for discharges to sensitive water bodies, and the plant likely meets these standards through a combination of biological treatment and disinfection. The facility's design capacity and operational status are not publicly documented, but its continued service to the region indicates compliance with permit requirements. The plant discharges treated wastewater into local waterways that ultimately drain into the San Joaquin River basin. This river system flows through the Central Valley and into the Sacramento-San Joaquin Delta, a critical ecological and water supply hub. The discharge contributes to the region's water balance and must meet strict nutrient and contaminant limits to protect downstream aquatic life and agricultural uses.

The plant's treated effluent enters the San Joaquin River watershed, which flows through California's Central Valley before reaching the Sacramento-San Joaquin Delta and San Francisco Bay. This watershed supports diverse aquatic species, including salmon and steelhead trout, and is a key migratory corridor for birds. The region's Mediterranean climate with seasonal droughts makes water quality management critical for both ecological health and agricultural irrigation downstream.