Superior WWTP - City of Superior, Wisconsin Wastewater Treatment Plant

Superior WWTP is a municipal wastewater treatment facility located in the City of Superior, Douglas County, Wisconsin, United States. The plant serves a population of about 28,273, placing it in the medium-agglomeration category under US regulatory frameworks. As a US facility, the plant operates under the Clean Water Act, with National Pollutant Discharge Elimination System (NPDES) permits issued by the Wisconsin Department of Natural Resources. The plant's proximity to Lake Superior, the largest of the Great Lakes, underscores its environmental significance. Treated effluent likely discharges into the Lake Superior basin, which supports diverse aquatic life and provides drinking water for millions. The plant plays a critical role in protecting this vital freshwater resource from nutrient pollution and pathogens.

Superior WWTP is situated near the western tip of Lake Superior, within the Lake Superior drainage basin. The receiving water body is likely a tributary or directly Lake Superior, which ultimately drains through the St. Marys River into Lake Huron and the Great Lakes system. The lake supports cold-water fish species such as lake trout and whitefish, and its oligotrophic conditions require careful management of nutrient inputs to prevent eutrophication.