Overview
Corvallis STP serves approximately 52,450 residents in Corvallis, Oregon, treating municipal wastewater before discharge. The plant operates under the U.S. Clean Water Act framework, with NPDES permits regulating effluent quality.
Corvallis STP is a municipal wastewater treatment facility located at 1301 Northeast 2nd Street in Corvallis, Oregon, serving a population of about 52,450. The plant is situated in Benton County, within the Willamette Valley region, and plays a key role in managing wastewater from the city and surrounding areas. As a facility in the United States, Corvallis STP operates under the Clean Water Act, administered by the Oregon Department of Environmental Quality. The National Pollutant Discharge Elimination System (NPDES) permit program sets discharge limits to protect water quality. For a medium-sized agglomeration like Corvallis, secondary treatment is typically required, with possible additional nutrient removal to meet local water quality standards. The treated effluent from Corvallis STP is discharged into the Willamette River, a major tributary of the Columbia River. The Willamette River supports diverse aquatic life, including salmon and steelhead runs, and is an important ecological and recreational resource. The plant's operations are critical to maintaining water quality in this sensitive river system.
Environmental context
Corvallis STP discharges into the Willamette River, which flows northward to join the Columbia River near Portland, ultimately reaching the Pacific Ocean. The Willamette River basin supports a rich ecosystem, including migratory fish species such as Chinook salmon and steelhead trout. The river is also used for recreation, irrigation, and drinking water supply downstream. Protecting water quality in this watershed is essential for both ecological health and human use.
Frequently asked questions
Corvallis STP is located at 1301 Northeast 2nd Street in Corvallis, Oregon, United States.
Corvallis STP serves approximately 52,450 residents in the Corvallis area.
Corvallis STP discharges treated wastewater into the Willamette River, which flows into the Columbia River and eventually the Pacific Ocean.
Corvallis STP operates under the Clean Water Act, with an NPDES permit issued by the Oregon Department of Environmental Quality. This permit sets effluent limits to protect water quality in the Willamette River.
For a medium-sized agglomeration like Corvallis, secondary treatment is standard under the Clean Water Act. Additional nutrient removal may be required to meet local water quality standards, especially in sensitive watersheds like the Willamette River.
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