N Lake Rec Sewer and Water District Wastewater Treatment Plant, Donnelly, Idaho

The N Lake Rec Sewer and Water District operates an advanced wastewater treatment plant in Donnelly, Idaho, serving a population of about 2,011. The facility is situated in Valley County, within the mountainous region of central Idaho, and provides essential wastewater services to the local community. The plant employs advanced treatment processes, ensuring high-quality effluent. It treats an average discharge volume of 643.52 acre-feet per year, with a designed capacity of 5,223.85 acre-feet, indicating ample capacity for current and future needs. As a US facility, 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 stringent limits on effluent quality. The treated wastewater is discharged into the local watershed, which drains into the Payette River system, ultimately flowing into the Snake River and then the Columbia River. This waterway supports diverse aquatic life and is important for regional recreation and agriculture. The plant's advanced treatment helps protect these downstream ecosystems.

The plant discharges into the Payette River basin, which flows into the Snake River and eventually the Columbia River, reaching the Pacific Ocean. The watershed supports cold-water fisheries, including trout and salmon, and is used for irrigation and recreation. Advanced treatment helps maintain water quality in this ecologically sensitive mountain region.