Poygan PoySippi SD 1 WWTP - Advanced Wastewater Treatment in Town of Poygan, Wisconsin

Poygan PoySippi SD 1 WWTP is a municipal wastewater treatment facility located in the Town of Poygan, Winnebago County, Wisconsin. The plant serves a population of 894 and operates with advanced treatment processes, ensuring high-quality effluent before discharge. The plant has a designed capacity of 295.26 megaliters and currently treats 136.28 megaliters annually. As a US facility, it 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, which regulate discharge limits to protect water quality. The treated effluent is discharged into local waterways that drain into the Lake Winnebago watershed, ultimately reaching Lake Michigan. The plant's advanced treatment helps protect the sensitive aquatic ecosystems of the Great Lakes basin, including fish habitats and water quality for downstream communities.

The plant discharges into the Lake Winnebago watershed, which flows through the Fox River into Green Bay and Lake Michigan. This region supports diverse aquatic life, including walleye, perch, and migratory birds. Advanced treatment reduces nutrient loading, helping to prevent algal blooms and maintain water quality in the Great Lakes ecosystem.