Tryon Creek STP, Milwaukie | Oregon Wastewater

Overview

Tryon Creek STP in Milwaukie, Oregon serves approximately 78,460 people. The plant operates under the U. S. Clean Water Act, discharging treated wastewater into the Willamette River system.

Tryon Creek STP is a municipal wastewater treatment facility located in Milwaukie, Oregon, serving a population of about 78,460. The plant is situated in Clackamas County and is part of the region's wastewater infrastructure, managing flows from residential and commercial sources. Under the U. S. Clean Water Act, the plant operates under an NPDES permit issued by the Oregon Department of Environmental Quality. For a facility of this scale, secondary treatment is typically required, with additional nutrient removal in sensitive watersheds. The plant's treatment processes are designed to meet state and federal effluent standards. The treated effluent is discharged into Tryon Creek, which flows into the Willamette River, a major tributary of the Columbia River. The Willamette River supports diverse aquatic life, including salmon and steelhead, and is an important ecological corridor in the Pacific Northwest. The plant plays a key role in protecting water quality in this urbanized watershed.

Environmental context

Tryon Creek STP discharges into Tryon Creek, a tributary of the Willamette River, which flows north to join the Columbia River. The Willamette River basin supports critical habitats for salmonids and other native species. The plant's operations help maintain water quality in an urbanized area, reducing nutrient and pollutant loads to downstream ecosystems.

Frequently asked questions

Tryon Creek STP is located at 925 Southeast Courtney Avenue in Milwaukie, Oregon, within Clackamas County.

The plant serves approximately 78,460 people in the Milwaukie area and surrounding communities.

The plant discharges treated effluent into Tryon Creek, which flows into the Willamette River and eventually the Columbia River.

The plant operates under the U. S. Clean Water Act, with an NPDES permit issued by the Oregon Department of Environmental Quality.

Facilities of this scale in Oregon typically employ secondary treatment with potential nutrient removal to meet water quality standards in sensitive watersheds like the Willamette River basin.