Onion River SC STP - Advanced Wastewater Treatment in Hingham, Wisconsin

Onion River SC STP is a municipal wastewater treatment facility located in Hingham, Wisconsin, within Sheboygan County. The plant serves a population of 1,242 and operates with advanced treatment capabilities, reflecting a commitment to high effluent quality standards. Its location near the western shore of Lake Michigan places it in a sensitive coastal environment. The plant has a designed capacity of 382.33 cubic meters per day and currently discharges 378.54 cubic meters per day of treated wastewater. As an advanced treatment facility, it likely employs processes such as nutrient removal or filtration beyond secondary treatment. Under the U.S. Clean Water Act, such plants must comply with National Pollutant Discharge Elimination System (NPDES) permits, which set strict limits on pollutants to protect receiving waters. Treated effluent from the plant ultimately reaches Lake Michigan, a vital freshwater resource and part of the Great Lakes system. The lake supports diverse aquatic life, including fish species such as lake trout and whitefish, and provides drinking water for millions. The plant's advanced treatment helps minimize nutrient loading and other pollutants, contributing to the ecological health of this important water body.

The plant discharges into the Onion River, which flows into Lake Michigan, part of the Great Lakes basin. Lake Michigan is a large freshwater ecosystem supporting diverse aquatic life, including fish, invertebrates, and migratory birds. The plant's advanced treatment reduces nutrient and pollutant loads, helping to prevent eutrophication and protect water quality in this ecologically sensitive region.