Potlatch S_T Facility Wastewater Treatment Plant, Nez Perce County, Idaho

Potlatch S_T Facility is a municipal wastewater treatment plant located on Mill Road in Nez Perce County, Idaho, United States. The plant serves a population of approximately 1,197 residents and operates under secondary treatment standards, which are typical for small communities in the region. The plant has a designed capacity of 253.62 volume units and currently treats an average daily flow of 162.77 volume units, indicating operational headroom. As a US facility, it is subject to the Clean Water Act and operates under an NPDES permit issued by the Idaho Department of Environmental Quality, which sets effluent limits to protect water quality. The treated effluent is discharged into a receiving water body that drains into the Clearwater River, a major tributary of the Snake River. The Snake River flows into the Columbia River, which ultimately reaches the Pacific Ocean. The plant plays a key role in protecting downstream aquatic habitats and maintaining water quality in the region.

The plant discharges into a water body that flows into the Clearwater River, which joins the Snake River in western Idaho. The Snake River is a vital waterway for irrigation, recreation, and fish migration, including salmon and steelhead. The plant's secondary treatment helps reduce nutrient and organic loads, supporting the ecological health of the downstream river system.