Hammond STP Wastewater Treatment Plant, Village of Hammond, Wisconsin

Hammond STP is a municipal wastewater treatment facility located in the Village of Hammond, Saint Croix County, Wisconsin. Serving a population of approximately 1,447, the plant is part of the region's infrastructure for managing domestic wastewater in this rural community. The plant provides secondary treatment, which is the standard level required by the U.S. Clean Water Act for municipal wastewater. With a designed capacity of 878.21 thousand gallons per day and an average discharge volume of 416.40 thousand gallons per day, the facility operates well within its capacity. The plant is regulated under the National Pollutant Discharge Elimination System (NPDES) permit program, administered by the Wisconsin Department of Natural Resources. The treated effluent from Hammond STP is discharged to a local water body that ultimately drains into the St. Croix River, a tributary of the Mississippi River. The St. Croix River is a National Scenic Riverway and supports diverse aquatic life, including fish species such as walleye and smallmouth bass. The plant's operations help protect water quality in this ecologically significant watershed.

The plant discharges into a local stream that flows into the St. Croix River, a major tributary of the Mississippi River. The St. Croix River is known for its high water quality and supports a variety of fish and wildlife, including several species of freshwater mussels. The plant's secondary treatment helps reduce nutrient and organic pollutant loads, protecting downstream aquatic habitats.