Calpella WWTP - Secondary Wastewater Treatment in Calpella, California

Calpella WWTP is a municipal wastewater treatment facility located in Calpella, Mendocino County, California. The plant serves a small population of 540 residents, reflecting its role in a rural community. It is situated inland, away from coastal areas, and operates under the regulatory framework of the United States Clean Water Act. The plant provides secondary treatment, which is the standard level required by the U.S. Environmental Protection Agency (EPA) for municipal wastewater facilities. Secondary treatment typically involves biological processes to remove organic matter and suspended solids. The plant has a designed capacity of 151.42 million gallons per year and treats an average discharge volume of 174.13 million gallons per year, indicating it operates near its capacity. The treated effluent is discharged into a local water body, likely a tributary of the Russian River or a nearby creek, which ultimately flows into the Pacific Ocean. The plant's operations are important for protecting the water quality of the region's watershed, supporting aquatic life, and maintaining the ecological health of downstream environments.

Calpella WWTP discharges into a local watercourse that is part of the Russian River watershed, which drains into the Pacific Ocean. The Russian River supports diverse aquatic species, including salmon and steelhead trout, and is an important ecological corridor. The plant's secondary treatment helps reduce nutrient and pollutant loads, protecting downstream habitats and water quality.