Overview
Cottage Grove STP serves approximately 9,745 residents in Cottage Grove, Oregon. The plant operates under U.S. EPA NPDES permitting and discharges treated wastewater to local waterways.
Cottage Grove STP is a municipal wastewater treatment plant located at 1800 North Douglas Avenue in Cottage Grove, Oregon. Serving a population of roughly 9,745, the facility is part of the city's infrastructure managed under the U.S. Clean Water Act. As a plant serving a small agglomeration, it is subject to EPA National Pollutant Discharge Elimination System (NPDES) permit requirements. Typical treatment for communities of this size in Oregon involves secondary treatment, often with disinfection, to meet state water quality standards. The plant discharges treated effluent into the Coast Fork Willamette River, which flows into the Willamette River and eventually the Columbia River. This watershed supports diverse aquatic life and is important for regional water quality and downstream ecosystems.
Environmental context
The plant discharges into the Coast Fork Willamette River, a tributary of the Willamette River, which flows into the Columbia River and ultimately the Pacific Ocean. The watershed supports salmonid species and other aquatic life, making effective treatment critical for maintaining water quality and ecosystem health.
Frequently asked questions
Cottage Grove STP is located at 1800 North Douglas Avenue in Cottage Grove, Oregon, United States.
Cottage Grove STP serves approximately 9,745 residents in the Cottage Grove area.
The plant discharges treated effluent into the Coast Fork Willamette River, which flows into the Willamette River and eventually the Columbia River.
The plant operates under the U.S. Clean Water Act and is subject to EPA NPDES permitting, which sets discharge limits to protect water quality.
Plants of this scale in Oregon typically employ secondary treatment with disinfection, meeting state standards for biological oxygen demand and suspended solids.
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