Country Club Est WWTF - Los Osos, California Wastewater Treatment Plant

Country Club Est WWTF is a municipal wastewater treatment facility located in Los Osos, San Luis Obispo County, California. The plant serves a population of approximately 1,400 residents and operates as part of the region's wastewater infrastructure. The plant provides secondary treatment, which is the standard level required by the US Clean Water Act for municipal wastewater. With a designed capacity of 75.71 million gallons per year, the facility manages the wastewater generated by the local community. The plant's discharge volume matches its designed capacity, indicating full utilization. The treated effluent is discharged into the local watershed, which ultimately drains to the Pacific Ocean. The plant's proximity to the coast (within 10 km) means its discharge can affect nearshore marine ecosystems. The facility plays a key role in protecting coastal water quality and supporting the ecological health of the Morro Bay estuary and adjacent marine habitats.

The plant discharges into the Los Osos Creek watershed, which flows into Morro Bay, a semi-enclosed estuary on the central California coast. Morro Bay supports diverse aquatic life, including eelgrass beds, migratory birds, and fish species. The bay ultimately connects to the Pacific Ocean. The plant's coastal location necessitates careful management to prevent nutrient enrichment and protect sensitive marine habitats.