ROOSEVELT LAGOON Wastewater Treatment Plant, Klickitat County, Washington

ROOSEVELT LAGOON is a wastewater treatment facility located in Klickitat County, Washington, United States. The plant serves a small population of 50 residents, reflecting its role as a local-scale treatment system in a rural area of the Pacific Northwest. The plant provides secondary treatment, a standard biological process that removes organic matter and suspended solids. With a designed capacity of 37.85 megaliters, the facility operates under the U.S. Clean Water Act, which requires NPDES permits for discharges to surface waters. For small systems like this, regulatory oversight ensures compliance with water quality standards. The treated effluent is discharged into the local watershed, which ultimately drains to the Columbia River system. This region supports diverse aquatic life, including salmon runs, and the plant's treatment helps protect downstream water quality in this ecologically important basin.

The plant discharges into the Columbia River basin, a major watershed that flows to the Pacific Ocean. This area supports critical salmon and steelhead habitats, making water quality protection essential. The secondary treatment reduces organic pollutants and suspended solids, helping maintain the ecological health of the river system.