COLVILLE SEW LAGOON Wastewater Treatment Plant, Colville, Washington

COLVILLE SEW LAGOON is a municipal wastewater treatment facility located in Colville, Washington, United States. The plant serves a population of approximately 5,116 residents in the Colville area, operating as part of the city's essential infrastructure. As a facility in the United States, the plant operates under the Clean Water Act and is subject to National Pollutant Discharge Elimination System (NPDES) permitting. For a community of this size, typical treatment involves secondary treatment processes such as lagoons or activated sludge to meet EPA standards for effluent quality. The plant's treated effluent is discharged into the Colville River watershed, which flows into the Columbia River and ultimately reaches the Pacific Ocean. The facility plays a key role in protecting local water quality and downstream aquatic ecosystems.

The plant discharges into the Colville River watershed, a tributary of the Columbia River. The Columbia River flows through Washington and Oregon before emptying into the Pacific Ocean. The watershed supports diverse aquatic life, including salmon and steelhead, making water quality protection critical for regional ecology.