Metolius STP Wastewater Treatment Plant, Metolius, Oregon

Metolius STP is a municipal wastewater treatment facility located in Metolius, a small town in Jefferson County, Oregon. The plant serves a population of approximately 780 residents, reflecting its role in managing local domestic wastewater within a rural community. The plant provides secondary treatment, a standard level required by the U.S. Clean Water Act for most municipal facilities. Secondary treatment typically involves biological processes to reduce organic matter and suspended solids. The plant's designed capacity matches its discharge volume at 363.40 units, indicating consistent operation within its engineered limits. Treated effluent from Metolius STP is discharged into a local water body that ultimately drains into the Deschutes River Basin, a major tributary of the Columbia River. This watershed supports diverse aquatic life and is important for regional water quality. The plant's operations are subject to EPA NPDES permits, ensuring compliance with federal and state standards to protect downstream ecosystems.

The plant discharges into a local watercourse within the Deschutes River Basin, which flows into the Columbia River and eventually the Pacific Ocean. The Deschutes River supports native fish species such as steelhead and Chinook salmon, making water quality management critical for aquatic habitat and regional ecological health.