SHARON STP Wastewater Treatment Plant, Town of Sharon, Wisconsin

SHARON STP is a municipal wastewater treatment facility located in the Town of Sharon, Walworth County, Wisconsin. The plant serves a population of approximately 1,569 residents, reflecting a small community scale typical of rural Wisconsin towns. The plant provides secondary treatment, which is the standard level required under the U.S. Clean Water Act for municipal wastewater. With a designed capacity of 972.85 units and a current discharge volume of 639.74 units, the facility operates below its full capacity. As a U.S. plant, it operates under a National Pollutant Discharge Elimination System (NPDES) permit issued by the Wisconsin Department of Natural Resources, ensuring compliance with federal water quality standards. The treated effluent is discharged into local waterways that drain into the Rock River basin, ultimately reaching the Mississippi River and the Gulf of Mexico. The plant plays a key role in protecting the region's surface water quality and supporting downstream aquatic ecosystems.

The plant discharges into the Rock River watershed, which flows southward through Illinois and joins the Mississippi River near the Quad Cities. This basin supports diverse aquatic life and is an important migratory corridor for fish. The downstream environment includes the Upper Mississippi River, a major ecological resource that provides habitat for numerous species and supports regional biodiversity.