ADAIR VILLAGE STP - Secondary Wastewater Treatment Plant in Adair Village, Oregon

ADAIR VILLAGE STP is a municipal wastewater treatment facility located in Adair Village, Benton County, Oregon. The plant serves a small population of 615 residents, reflecting the rural character of the community. It operates under the regulatory framework of the US Clean Water Act, which requires National Pollutant Discharge Elimination System (NPDES) permits for all point source discharges. The plant provides secondary treatment, a standard biological process that removes organic matter and suspended solids. Its designed capacity of 1203.76 units indicates headroom for future growth, while the current discharge volume of 264.98 units suggests efficient operation. As a small facility, it is subject to state-level oversight by the Oregon Department of Environmental Quality. The treated effluent is discharged into a local waterway that drains into the Willamette River basin, ultimately reaching the Columbia River and the Pacific Ocean. The plant plays a key role in protecting downstream water quality in this agriculturally and ecologically important region.

The plant discharges into a tributary of the Willamette River, which flows north through Oregon's Willamette Valley before joining the Columbia River. The Willamette River supports diverse aquatic life, including salmon and steelhead runs, and is a vital resource for irrigation and recreation. The plant's secondary treatment helps reduce nutrient and organic loading, mitigating eutrophication risks in the downstream river system.