Sturgeon Bay STP | Wastewater Treatment Plant in Sturgeon Bay, Wisconsin

Sturgeon Bay STP is a municipal wastewater treatment facility located on East Vine Street in Sturgeon Bay, Door County, Wisconsin. Serving a population of about 10,005, the plant is part of the region's infrastructure for managing domestic wastewater. The facility is situated within 50 kilometers of the Lake Michigan coastline, placing it in a sensitive coastal environment. As a U.S. facility, the plant operates under the Clean Water Act and is subject to National Pollutant Discharge Elimination System (NPDES) permits issued by the Wisconsin Department of Natural Resources. For a population of this scale, secondary treatment is typically required, with additional nutrient removal standards applicable in the Great Lakes basin to address eutrophication concerns. The plant's treated effluent ultimately drains into the Sturgeon Bay harbor, which connects to Lake Michigan, one of the largest freshwater lakes in the world. The receiving waters support diverse aquatic life, including fish species such as lake trout and whitefish, and are important for regional recreation and tourism. The plant's performance is critical to maintaining water quality in this ecologically sensitive Great Lakes ecosystem.

The plant discharges into Sturgeon Bay, a natural harbor on the Door Peninsula that flows into Lake Michigan. Lake Michigan is part of the Great Lakes system, which holds 20% of the world's surface freshwater and supports a complex food web including lake trout, whitefish, and migratory birds. The region is ecologically sensitive due to nutrient loading concerns that can lead to algal blooms and hypoxia, making effective wastewater treatment essential for protecting aquatic habitats and drinking water sources.