Riverside Sewage Treatment Plant - Clearwater County, Idaho Wastewater Facility

Riverside Sewage Treatment Plant is a municipal facility located in Clearwater County, Idaho, United States. It serves a small community of approximately 1,800 residents, providing essential wastewater treatment for the area. The plant is situated inland, away from coastal zones, and operates under the regulatory framework of the U.S. Clean Water Act. The plant provides secondary treatment, which is the standard level required by the U.S. Environmental Protection Agency (EPA) for municipal wastewater facilities. With a designed capacity of 3,331.15 units, the plant treats an average daily flow of 908.50 units, indicating it operates well below its maximum capacity. This suggests the plant has room for future growth or seasonal variations in flow. The treated effluent is discharged into a local water body, likely a river or stream within the Clearwater River basin, which ultimately drains into the Snake River and then the Columbia River. This watershed supports diverse aquatic life and is important for regional water quality. The plant's secondary treatment helps protect downstream ecosystems from nutrient pollution and pathogens.

The plant discharges into a tributary of the Clearwater River, which flows into the Snake River and eventually the Columbia River, reaching the Pacific Ocean. This watershed supports salmon and steelhead runs, making nutrient and pathogen control critical. Secondary treatment reduces biochemical oxygen demand and suspended solids, helping maintain water quality for aquatic habitats and downstream communities.