ST NAZIANZ WWTP - Advanced Wastewater Treatment in Saint Nazianz, Wisconsin

ST NAZIANZ WWTP is a municipal wastewater treatment facility located in Saint Nazianz, Wisconsin, United States. It serves a small population of 737 residents in this rural community within Manitowoc County. The plant operates under the regulatory framework of the US Clean Water Act, which requires National Pollutant Discharge Elimination System (NPDES) permits for all discharges. The facility provides advanced treatment, exceeding the secondary treatment standard typically required for municipal plants. It has a design capacity of 757.08 thousand cubic meters and treats an average annual discharge volume of 242.27 thousand cubic meters. As a small-scale plant, it meets the treatment expectations for its population tier under US EPA regulations. The treated effluent is discharged into local waterways that drain into Lake Michigan, part of the Great Lakes system. The plant plays a key role in protecting the Lake Michigan watershed from nutrient pollution and pathogens, supporting aquatic life and recreational uses downstream.

The plant discharges into streams that flow into Lake Michigan, a major freshwater resource and part of the Great Lakes ecosystem. The watershed supports diverse aquatic species and provides drinking water for millions. Advanced treatment helps reduce phosphorus and nitrogen loads, mitigating eutrophication risks in the lake.