Potosi Tennyson SC WWTP - Advanced Wastewater Treatment in Town of Potosi, Wisconsin

Potosi Tennyson SC WWTP is a municipal wastewater treatment facility located in the Town of Potosi, Grant County, Wisconsin. The plant serves a population of approximately 1,111 residents, providing essential sanitation services to this rural community in the Driftless Area of southwestern Wisconsin. The facility employs advanced treatment processes, which go beyond secondary treatment to remove nutrients and other pollutants. With a designed capacity of 1,892.70 cubic meters per day and an average discharge volume of 980.42 cubic meters per day, the plant operates well within its capacity. As a US facility, it operates under the Clean Water Act, with National Pollutant Discharge Elimination System (NPDES) permits issued by the Wisconsin Department of Natural Resources, ensuring compliance with water quality standards. The treated effluent is discharged into a local waterway that ultimately drains to the Mississippi River via the Grant River or other tributaries. The plant's advanced treatment helps protect the sensitive karst topography and groundwater resources of the region, as well as the aquatic ecosystems of the Mississippi River basin.

The plant discharges into a tributary of the Grant River, which flows into the Mississippi River, a major North American waterway. The Mississippi River supports diverse aquatic life and is an important migratory corridor for fish and birds. The advanced treatment at this facility helps reduce nutrient loading, protecting downstream water quality in the Mississippi River and the Gulf of Mexico.