South Wayne STP - Secondary Wastewater Treatment in South Wayne, Wisconsin

South Wayne STP is a municipal wastewater treatment facility located in South Wayne, Lafayette County, Wisconsin. The plant serves a small population of 568 residents, reflecting the rural character of the community. It is situated along the Cheese Country Trail, a multi-use recreational path. The plant provides secondary treatment, which is the standard level required by the U.S. Clean Water Act for municipal wastewater. Secondary treatment typically involves biological processes to remove organic matter and suspended solids. The plant has a designed capacity of 261.19 million gallons per year and currently discharges 113.56 million gallons annually, indicating it operates well below its capacity. The treated effluent is discharged into local streams that are part of the Mississippi River basin. The plant plays a key role in protecting downstream water quality, including the Pecatonica River and ultimately the Mississippi River. Its operation helps maintain the ecological health of these waterways, which support diverse aquatic life and recreational activities.

The plant discharges into tributaries of the Pecatonica River, which flows into the Mississippi River. The Mississippi River basin is a major ecological corridor supporting fish, migratory birds, and wetland habitats. The plant's secondary treatment helps reduce nutrient loads and organic pollution, contributing to the overall health of this extensive river system.