Tenino Wastewater Facility - Municipal Treatment in Washington, USA

Tenino Wastewater Facility is a municipal wastewater treatment plant located in Tenino, Washington, a small city in Thurston County. The facility serves a population of about 1,700 people, reflecting its role in managing wastewater for a small community. The plant has a designed capacity of 1.00 million gallons per day, indicating its scale relative to the local population. As a U.S. wastewater facility, Tenino Wastewater Facility operates under the Clean Water Act, which requires National Pollutant Discharge Elimination System (NPDES) permits for discharges. For small communities like Tenino, secondary treatment is typically mandated to protect water quality. Regulatory compliance ensures appropriate treatment standards are met. The plant discharges treated wastewater into a local water body, likely a tributary of the Chehalis River basin, which flows to the Pacific Ocean via Grays Harbor. This discharge supports the ecological health of downstream aquatic habitats, including salmon runs and other sensitive species. The facility's inland location, over 50 km from the coast, reduces direct marine impact but emphasizes the importance of protecting freshwater ecosystems.

The plant's discharge enters a local stream that drains into the Chehalis River basin, ultimately reaching Grays Harbor and the Pacific Ocean. This watershed supports diverse aquatic life, including salmon and trout species that rely on clean water for spawning. The facility's location away from the coast reduces marine nutrient loading but requires careful management to protect freshwater habitats from nutrient pollution and other contaminants.