Downey Sewage Lagoon System: Wastewater Treatment in Downey, Idaho

The Downey Sewage Lagoon System is a municipal wastewater treatment facility located in Downey, Idaho, a small community in Bannock County. Serving a population of 625, the plant provides secondary treatment to manage domestic wastewater from the area. As a secondary treatment facility, the plant meets the standard requirements under the U.S. Clean Water Act, which mandates secondary treatment for municipal wastewater to reduce organic pollutants and suspended solids. The plant's designed capacity is 302.83 volume units, and it operates under the regulatory framework of the U.S. Environmental Protection Agency (EPA) and the Idaho Department of Environmental Quality. The treated effluent is discharged into local receiving waters, which are part of the Bear River watershed. This river system flows into the Great Salt Lake, an ecologically significant terminal lake. The plant's operations help protect downstream water quality and support aquatic life in the region.

The Downey Sewage Lagoon System discharges into the Bear River watershed, which drains into the Great Salt Lake. This terminal lake is a critical habitat for migratory birds and supports unique brine shrimp and algae ecosystems. The plant's secondary treatment reduces nutrient and organic loads, helping to maintain water quality in this sensitive arid-region watershed.