Kewaunee WWTP - Municipal Wastewater Treatment in Kewaunee, Wisconsin

Kewaunee WWTP is a municipal wastewater treatment facility serving the city of Kewaunee, Wisconsin, United States. The plant is designed with a capacity of 1.00 million gallons per day and serves a population of approximately 2,952 residents, reflecting a small to medium-sized agglomeration typical of rural communities in the Great Lakes region. As a facility in the United States, Kewaunee WWTP operates under the Clean Water Act, administered by the Wisconsin Department of Natural Resources. The National Pollutant Discharge Elimination System (NPDES) permit program sets discharge limits to protect water quality. For plants of this scale, secondary treatment is the standard requirement, with additional nutrient controls in sensitive watersheds. The plant's treated effluent ultimately reaches Lake Michigan, one of the largest freshwater lakes in the world and a critical resource for drinking water, recreation, and aquatic ecosystems. The Lake Michigan basin supports diverse fish populations, including lake trout and whitefish, and is a vital migratory corridor for birds. Protecting water quality in this basin is essential for the ecological health of the Great Lakes system.

Kewaunee WWTP discharges into the Lake Michigan basin, which drains into the Great Lakes system and eventually the St. Lawrence River and Atlantic Ocean. Lake Michigan supports a complex aquatic ecosystem, including cold-water fish species and benthic communities. The plant's location within 50 km of the coast means its discharge can influence nearshore water quality, particularly during periods of low water exchange. Nutrient loading from wastewater can contribute to algal blooms in the lake, making effective treatment important for maintaining ecological balance.