Green Lake WWTP - Secondary Treatment Facility in City of Green Lake, Wisconsin

Green Lake WWTP is a municipal wastewater treatment facility located in the City of Green Lake, Wisconsin, United States. It serves a population of approximately 1,405 residents, providing secondary treatment to manage domestic wastewater from the community. The plant operates under the regulatory framework of the U.S. Clean Water Act, administered by the Wisconsin Department of Natural Resources. As a secondary treatment facility, it meets the standard requirements for biological treatment and solids removal, ensuring compliance with National Pollutant Discharge Elimination System (NPDES) permit conditions. The treated effluent is discharged into the local watershed, which ultimately drains to Green Lake, a natural lake in the region. The plant plays a key role in protecting the lake's water quality and supporting aquatic life in the surrounding environment.

The plant discharges into the Green Lake watershed, which feeds into Green Lake, a deep natural lake in south-central Wisconsin. The lake supports diverse aquatic life and is used for recreation. Downstream, the water flows via the Puchyan River to the Fox River and eventually into Lake Michigan, a major freshwater resource. Protecting this chain from nutrient pollution is critical for maintaining ecosystem health.