GLENWOOD CITY STP - Secondary Wastewater Treatment in Town of Forest, Wisconsin

GLENWOOD CITY STP is a municipal wastewater treatment plant located in the Town of Forest, Saint Croix County, Wisconsin. Serving a population of 1,524, the plant provides secondary treatment for the community's wastewater. The facility operates under the regulatory framework of the US Clean Water Act, which requires NPDES permits for discharges to surface waters. The plant has a designed capacity of 991.77 volume units and a current discharge volume of 681.37 volume units, indicating it operates below its design capacity. As a secondary treatment facility, it uses biological processes to reduce organic matter and suspended solids, meeting typical standards for smaller agglomerations in the region. The treated effluent is discharged into local streams that flow into the St. Croix River, a major tributary of the Mississippi River. The St. Croix River is a National Scenic Riverway, supporting diverse aquatic life and providing recreational opportunities. The plant's operations help protect water quality in this ecologically significant watershed.

The plant's discharge enters local waterways within the St. Croix River basin, which flows south to join the Mississippi River near Prescott, Wisconsin. The St. Croix River is known for its high water quality and supports a variety of fish species, including smallmouth bass and walleye. Downstream, the Mississippi River carries the combined flows to the Gulf of Mexico, making nutrient management important for preventing hypoxia in the Gulf.