COBB STP - Secondary Wastewater Treatment Plant in Cobb, Wisconsin

COBB STP is a municipal wastewater treatment facility located in Cobb, Wisconsin, United States. The plant serves a small population of 461 residents and operates under secondary treatment standards, which are typical for communities of this size in the US. The plant has a designed capacity of 227.12 units and currently treats a discharge volume of 132.49 units. As a secondary treatment facility, it meets the Clean Water Act requirements for removing organic matter and suspended solids before discharge. 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 is discharged to a local waterway within the Upper Mississippi River Basin. The plant's operations help protect downstream water quality in the region, which supports diverse aquatic life and recreational uses. Its inland location reduces direct marine impact, but careful management is needed to prevent nutrient loading in the watershed.

The plant discharges into a tributary of the Upper Mississippi River Basin, which ultimately flows to the Mississippi River and the Gulf of Mexico. The local watershed supports agricultural land use and mixed ecosystems. Downstream waters provide habitat for fish and migratory birds, and the plant's nutrient removal is important for mitigating hypoxia in the Gulf.