Waterville S_T Facility - Secondary Wastewater Treatment in Kittitas County, Washington

The Waterville S_T Facility is a municipal wastewater treatment plant located in Kittitas County, Washington, United States. It serves a small population of approximately 1,140 residents in the rural area of Waterville. The plant operates under the regulatory framework of the U.S. Clean Water Act, which requires secondary treatment for municipal discharges to surface waters. The plant provides secondary treatment, a standard biological process that removes organic matter and suspended solids. With a designed capacity of 446.68 units and a discharge volume of 594.31 units, the facility manages wastewater from the local community. As a small-scale plant, it is subject to state-level National Pollutant Discharge Elimination System (NPDES) permits issued by the Washington State Department of Ecology. The treated effluent is discharged into a receiving water body that ultimately drains into the Columbia River basin. The Columbia River system supports diverse aquatic life, including salmon runs, and flows to the Pacific Ocean. The plant's operations are important for protecting local water quality in this ecologically sensitive watershed.

The plant discharges into a water body within the Columbia River basin, which flows through Washington and Oregon before reaching the Pacific Ocean. The Columbia River supports critical habitats for salmon, steelhead, and other native fish species. The plant's secondary treatment helps reduce nutrient and pollutant loads, protecting downstream water quality in this important river system.