S FRK COEUR D ALENE RVR SD PAGE Wastewater Treatment Plant, Shoshone County, Idaho

S FRK COEUR D ALENE RVR SD PAGE is a wastewater treatment facility located in Shoshone County, Idaho, along US 10. The plant serves a population of about 8,924, placing it in the small-to-medium agglomeration category under US regulatory frameworks. As a facility in the United States, it operates under the Clean Water Act, with National Pollutant Discharge Elimination System (NPDES) permits issued by the Idaho Department of Environmental Quality, which set effluent limits to protect water quality. However, for a facility of this scale, typical treatment includes secondary treatment (biological processes) to meet federal and state standards. The plant's discharge is regulated to ensure compliance with water quality criteria for the receiving water body. The treated effluent is discharged into the South Fork Coeur d'Alene River, which flows into the Coeur d'Alene River and ultimately into Lake Coeur d'Alene. This water body is part of the Spokane River Basin, which drains to the Columbia River and the Pacific Ocean. The region is known for its mining history, and the river system supports diverse aquatic life, including trout and salmon species.

The plant discharges into the South Fork Coeur d'Alene River, a tributary of the Coeur d'Alene River, which flows into Lake Coeur d'Alene. This lake is a large, deep lake in northern Idaho that drains via the Spokane River to the Columbia River and the Pacific Ocean. The watershed has historically been impacted by mining activities, and the river supports sensitive aquatic ecosystems, including populations of native fish such as westslope cutthroat trout. The plant's discharge must meet strict water quality standards to protect these downstream environments.