Cheney S_T Facility Wastewater Treatment Plant, Cheney, Washington

The Cheney S_T Facility is a municipal wastewater treatment plant located on West Anderson Road in Cheney, Washington, within Spokane County. The plant serves a population of about 10,790 residents, placing it in the small-to-medium agglomeration category for US inland communities. As a US facility, the plant operates under the Clean Water Act's National Pollutant Discharge Elimination System (NPDES) permit program, administered by the Washington State Department of Ecology. For plants serving populations around 10,000, secondary treatment is typically required, with additional nutrient controls if discharging to sensitive waters. The plant's treated effluent is discharged into the local watershed, which ultimately drains into the Spokane River and then the Columbia River system. The Columbia River basin supports diverse aquatic life, including salmon runs, and is a critical water resource for the Pacific Northwest region.

The Cheney S_T Facility discharges into the Spokane River watershed, which flows into the Columbia River and eventually the Pacific Ocean. The Spokane River supports important fisheries, including native trout and salmon species, and is a key water source for regional agriculture and communities. The plant's operations are subject to Washington State water quality standards to protect these downstream ecosystems.