ROXBURY SD 1 STP - Advanced Wastewater Treatment in Roxbury, Wisconsin

ROXBURY SD 1 STP is a municipal wastewater treatment facility located at 7248 Inama Road in Roxbury, Wisconsin, within Dane County. The plant serves a small population of 249 residents, reflecting its role in a rural community. As a publicly owned treatment works, it is part of the decentralized wastewater infrastructure typical of smaller agglomerations in the United States. The plant provides advanced treatment, which goes beyond the secondary treatment standard required by the US Clean Water Act. Advanced treatment typically includes nutrient removal (nitrogen and phosphorus) or additional filtration, ensuring high-quality effluent. The plant has a designed capacity of 113.56 thousand cubic meters per year and currently discharges 75.71 thousand cubic meters annually, indicating operational headroom. The treated effluent from ROXBURY SD 1 STP is discharged into local surface waters that eventually drain into the Wisconsin River basin, a major tributary of the Mississippi River. This watershed supports diverse aquatic life and provides drinking water for downstream communities. The plant's advanced treatment helps protect the sensitive receiving waters from nutrient pollution and other contaminants.

The plant discharges into the Wisconsin River watershed, which flows into the Mississippi River and ultimately the Gulf of Mexico. This basin supports a variety of fish and wildlife, including migratory birds and freshwater mussels. Advanced treatment at this plant reduces nutrient loading, helping to mitigate hypoxia in the Gulf of Mexico.