DAYTON STP - Dayton, Oregon Wastewater Treatment Plant

DAYTON STP is a municipal wastewater treatment plant located in Dayton, Oregon, United States. The facility serves a population of approximately 2,390 residents and operates under the regulatory framework of the US Clean Water Act, which requires secondary treatment for municipal discharges. The plant provides secondary treatment, a standard level for communities of this size in the United States. With a designed capacity of 870.64 thousand cubic meters per year and an average discharge volume of 738.16 thousand cubic meters per year, the plant operates within its capacity. The treated effluent is discharged into the local watershed, which ultimately drains into the Yamhill River and then the Willamette River, a major tributary of the Columbia River. The Willamette River supports diverse aquatic life and is an important ecological corridor in the Pacific Northwest.

The plant discharges into the Yamhill River watershed, which flows into the Willamette River and eventually the Columbia River. The Willamette River supports salmon and steelhead runs, making water quality management critical for downstream ecosystems. The region's agricultural and urban land uses contribute to nutrient loading concerns.