ATASCADERO WWTF - Atascadero, California Wastewater Treatment Plant

ATASCADERO WWTF is a municipal wastewater treatment facility located in Atascadero, San Luis Obispo County, California. The plant serves a population of about 21,915 residents in this Central Coast community. It is situated inland, more than 50 kilometers from the Pacific Ocean. The plant's designed capacity is 1.00 million gallons per day. As a US facility serving a medium-sized agglomeration, it operates under the Clean Water Act and is subject to National Pollutant Discharge Elimination System (NPDES) permits issued by the California State Water Resources Control Board. These permits set effluent limits to protect water quality in the receiving water body. The treated effluent from ATASCADERO WWTF is discharged to a local watercourse that flows into the Salinas River, which ultimately drains to Monterey Bay and the Pacific Ocean. The Salinas River supports diverse aquatic life and is an important migratory corridor for steelhead trout and other species. The plant's operations help protect downstream water quality in this ecologically sensitive watershed.

ATASCADERO WWTF discharges to a tributary of the Salinas River, which flows through the Salinas Valley to Monterey Bay and the Pacific Ocean. The Salinas River watershed supports agricultural irrigation and provides habitat for steelhead trout and other native fish species. The plant's effluent management is critical for maintaining water quality in this region, which faces challenges from agricultural runoff and seasonal low flows.