LEWISTON Wastewater Treatment Plant, Lewiston, Utah

The LEWISTON wastewater treatment plant is located in Lewiston, Utah, United States, serving a population of 1,772. The facility provides secondary treatment, a standard level for small communities in the US, ensuring compliance with Clean Water Act requirements. The plant has a designed capacity of 1,514.16 m³/day and currently processes an average daily flow of 757.08 m³/day, operating at about half its capacity. As a US municipal facility, it operates under an EPA NPDES permit issued by the Utah Division of Water Quality, which sets effluent limits to protect receiving waters. The treated effluent likely discharges to a local waterway within the Bear River Basin, which ultimately flows into the Great Salt Lake. This watershed supports diverse aquatic life and is an important migratory corridor for birds. The plant's secondary treatment helps reduce nutrient and organic loads, protecting downstream water quality.

The plant discharges into the Bear River Basin, which drains into the Great Salt Lake, a terminal saline lake of ecological significance. The watershed supports migratory birds and aquatic species. Secondary treatment reduces biochemical oxygen demand and suspended solids, helping maintain water quality in this sensitive arid-region ecosystem.