Overview
MILTON FREEWATER STP serves approximately 6,560 residents in Milton-Freewater, Oregon. The plant discharges treated wastewater into the local watershed, supporting downstream water quality in the Umatilla River basin.
MILTON FREEWATER STP is a municipal wastewater treatment plant located in Milton-Freewater, Umatilla County, Oregon. Serving a population of about 6,560, the facility is part of the region's infrastructure for managing domestic wastewater in this inland community. As a U.S. plant, it operates under the Clean Water Act's National Pollutant Discharge Elimination System (NPDES) permit program, which sets effluent limits to protect water quality. The plant's treated effluent discharges into the Umatilla River watershed, which flows into the Columbia River and ultimately the Pacific Ocean. This connection underscores the plant's role in safeguarding aquatic habitats and downstream water users in the Columbia River basin.
Environmental context
The plant discharges into the Umatilla River watershed, a tributary of the Columbia River. The Columbia River supports diverse aquatic life, including salmon and steelhead runs, and is a critical migratory corridor. Protecting water quality in this basin is essential for maintaining ecosystem health and regional water resources.
Frequently asked questions
MILTON FREEWATER STP is located in Milton-Freewater, Umatilla County, Oregon, United States.
The plant serves approximately 6,560 residents in the Milton-Freewater area.
The plant discharges treated effluent into the Umatilla River watershed, which flows into the Columbia River and eventually the Pacific Ocean.
As a U.S. facility, it operates under the Clean Water Act and is subject to NPDES permit requirements that set effluent limits to protect water quality.
For communities of this size, secondary treatment is typically required under the Clean Water Act, which removes biodegradable organic matter and suspended solids.
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