Tomales WWTP - Secondary Wastewater Treatment in Tomales, California

Tomales WWTP is a municipal wastewater treatment facility located in Tomales, Marin County, California. Serving a small population of 325 residents, the plant provides secondary treatment to meet state and federal water quality standards. Its location near the Pacific coast places it under additional environmental scrutiny. The plant operates under the U.S. Clean Water Act, which requires secondary treatment for municipal wastewater. With a designed capacity of 151.42 units and an average daily discharge of 75.71 units, the facility maintains a utilization rate well within its capacity. The treatment process ensures that effluent meets regulatory limits before discharge. The treated wastewater is discharged into local waterways that ultimately drain to the Pacific Ocean. The plant's proximity to the coast (within 10 km) means its discharge can affect sensitive coastal ecosystems, including estuaries and marine habitats. Proper treatment is essential to protect water quality and aquatic life in the region.

Tomales WWTP discharges into the Tomales Bay watershed, which flows into the Pacific Ocean. The bay supports diverse marine life, including fish, shellfish, and migratory birds. The plant's coastal location requires careful management to prevent nutrient pollution and protect the ecological health of the bay and adjacent marine environment.