BLANCHARDVILLE STP - Secondary Wastewater Treatment in Blanchardville, Wisconsin

BLANCHARDVILLE STP is a municipal wastewater treatment facility located in Blanchardville, Lafayette County, Wisconsin. The plant serves a population of approximately 810 residents, classifying it as a small community system under US regulatory frameworks. The plant provides secondary treatment, which is the standard level required by the US Clean Water Act for most municipal discharges. With a designed capacity of 499.67 cubic meters per day and an average daily discharge of 378.54 cubic meters per day, the facility operates below its design capacity, indicating adequate headroom for current flows. The treated effluent is discharged into a local water body that ultimately drains into the Mississippi River Basin. The plant's operation is subject to National Pollutant Discharge Elimination System (NPDES) permits issued by the Wisconsin Department of Natural Resources, ensuring compliance with water quality standards to protect downstream aquatic ecosystems.

The plant discharges into a tributary of the Pecatonica River, which flows into the Rock River and eventually the Mississippi River. This watershed supports diverse aquatic life, including game fish species such as walleye and smallmouth bass. The region's agricultural landscape means the plant's nutrient removal performance is important for preventing algal blooms in downstream waters.