Stone Lake STP - Secondary Wastewater Treatment in Town of Stone Lake, Wisconsin

Stone Lake STP (Stone Lake Sewage Treatment Plant) is a municipal wastewater facility located in the Town of Stone Lake, Washburn County, Wisconsin. Serving a small population of 221 residents, the plant provides secondary treatment to meet state and federal water quality standards under the U.S. Clean Water Act. The plant operates with a designed capacity of 113.56 volume units and currently discharges 53.00 volume units, indicating available treatment capacity. As a secondary treatment facility, it uses biological processes to reduce organic matter and suspended solids before discharge, consistent with typical requirements for small communities in Wisconsin. The treated effluent is discharged into a local water body that ultimately drains into the Upper Mississippi River basin. The surrounding area features numerous lakes and wetlands, making proper wastewater treatment essential for protecting aquatic habitats and recreational water quality in the region.

The plant discharges into a receiving water body within the Upper Mississippi River basin, which flows south to the Gulf of Mexico. The local watershed includes numerous glacial lakes and wetlands that support diverse aquatic life and migratory waterfowl. Proper treatment helps prevent nutrient loading that could contribute to algal blooms in downstream waters.