Brownsville South Lagoon Wastewater Treatment Plant, Brownsville, Oregon

Brownsville South Lagoon is a municipal wastewater treatment facility located in Brownsville, Oregon, serving a population of approximately 1,500 residents. The plant is situated in Linn County, inland from the Pacific coast, and operates as part of the region's water infrastructure. The plant provides secondary treatment, which is the standard level required under the U.S. Clean Water Act for municipal wastewater facilities. With a designed capacity of 567.81 million gallons per year and an annual discharge volume of 416.40 million gallons, the plant operates below its capacity, indicating room for future growth or seasonal variations. The treated effluent is discharged into a local water body that ultimately drains into the Willamette River basin, a major tributary of the Columbia River. This watershed supports diverse aquatic life and is important for regional water quality and ecological health.

The plant discharges into a receiving water body within the Willamette River basin, which flows northward to join the Columbia River and eventually the Pacific Ocean. The watershed supports salmonid species and other aquatic life, making proper treatment essential for maintaining downstream water quality and ecosystem health.