CANYONVILLE STP - Canyonville, Oregon Wastewater Treatment Plant

CANYONVILLE STP is a municipal wastewater treatment facility located in Canyonville, Oregon, United States. The plant serves a population of approximately 1,730 residents, reflecting a small community in Douglas County. It operates under the regulatory framework of the U.S. Clean Water Act, which governs wastewater discharges through National Pollutant Discharge Elimination System (NPDES) permits issued by the Oregon Department of Environmental Quality. The plant provides secondary treatment, a standard biological process that removes organic matter and suspended solids. With a designed capacity of 1,892.70 units and an average daily discharge of 673.80 units, the facility operates well below its capacity, indicating room for future growth or seasonal variations. The treatment process aligns with federal requirements for secondary treatment, ensuring compliance with water quality standards. The treated effluent is discharged into a local water body, likely a tributary of the South Umpqua River, which flows into the Umpqua River and eventually reaches the Pacific Ocean. The plant plays a key role in protecting the Umpqua River basin's water quality, supporting aquatic life and downstream ecosystems in this forested region of Oregon.

The plant discharges into the South Umpqua River watershed, which drains into the Umpqua River and ultimately the Pacific Ocean. The Umpqua River basin supports diverse aquatic species, including salmon and steelhead trout, making water quality protection critical. The secondary treatment process reduces organic pollutants and suspended solids, helping maintain the ecological health of the river and its downstream estuary.