Overview
Sisters WW Treatment Improvements is a secondary treatment plant in Deschutes County, Oregon, serving 2,124 people. It discharges 196.84 units of treated wastewater and operates under the US Clean Water Act.
Sisters WW Treatment Improvements is a municipal wastewater treatment plant located in Deschutes County, Oregon, United States. The facility serves a population of approximately 2,124 residents and is situated in the central Oregon region, near the Deschutes National Forest. As a secondary treatment plant, it provides biological treatment to remove organic matter and suspended solids from wastewater before discharge. The plant operates under the regulatory framework of the US Clean Water Act, which requires secondary treatment for municipal wastewater facilities. The National Pollutant Discharge Elimination System (NPDES) permit program governs its discharge, ensuring compliance with water quality standards. The plant has a designed capacity of 1,703.43 units and currently discharges 196.84 units of treated effluent. The treated wastewater is discharged into a local water body that ultimately drains into the Deschutes River system. The Deschutes River flows northward through central Oregon, eventually joining the Columbia River. This watershed supports diverse aquatic life, including salmon and trout species, and is an important resource for irrigation and recreation in the region.
Environmental context
The plant discharges into a tributary of the Deschutes River, which flows through the high desert of central Oregon. The Deschutes River is a major tributary of the Columbia River, supporting a sensitive aquatic ecosystem with native fish species such as steelhead and bull trout. The watershed is ecologically significant due to its arid climate and reliance on groundwater and snowmelt, making water quality management critical for downstream habitats.
Frequently asked questions
The plant is located on Forest Road 1526-200 in Deschutes County, Oregon, United States, near the Deschutes National Forest.
The plant serves approximately 2,124 people in the Sisters area of Deschutes County.
The plant discharges treated effluent into a local water body that flows into the Deschutes River system, which ultimately reaches the Columbia River.
The plant operates under the US Clean Water Act and is subject to an NPDES permit issued by the Oregon Department of Environmental Quality, which sets limits on pollutant discharges.
Under the Clean Water Act, municipal plants serving populations of this size are typically required to provide secondary treatment, which includes biological processes to reduce organic matter and suspended solids.
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