Loganville STP - Secondary Wastewater Treatment Plant in Loganville, Wisconsin

Loganville STP is a municipal wastewater treatment facility located in Loganville, Sauk County, Wisconsin. Serving a small population of 304, the plant provides secondary treatment for the community's domestic wastewater. The facility operates under the regulatory framework of the U.S. Clean Water Act, administered by the Wisconsin Department of Natural Resources, which issues National Pollutant Discharge Elimination System (NPDES) permits for such plants. The plant has a designed capacity of 170.34 and a discharge volume of 117.35, indicating it operates below its design capacity. As a secondary treatment facility, it utilizes biological processes to remove organic matter and suspended solids, meeting the standard requirements for municipal wastewater treatment in the United States. The plant's treatment process is typical for small communities in the region. The treated effluent is discharged into a local water body that eventually drains into the Wisconsin River watershed, which flows southward to the Mississippi River and ultimately to the Gulf of Mexico. The plant plays a key role in protecting local water quality and the downstream aquatic ecosystem, which supports diverse fish and wildlife populations.

The plant discharges into a receiving water body within the Wisconsin River basin, which flows into the Mississippi River and then to the Gulf of Mexico. This watershed supports a variety of aquatic species and is an important migratory corridor for birds. The secondary treatment provided by the plant helps reduce nutrient and organic pollutant loads, protecting downstream water quality and ecological health.