COLFAX WWTP - Secondary Treatment Plant in Dunn County, Wisconsin

COLFAX WWTP is a municipal wastewater treatment facility located in Dunn County, Wisconsin, serving the Town of Colfax and surrounding areas. The plant provides secondary treatment for a population of 1,165, with a designed capacity of 386.11 thousand gallons per day and an average discharge volume of 264.98 thousand gallons per day. As a secondary treatment plant, COLFAX WWTP meets the standard requirements under the U.S. Clean Water Act, which mandates secondary treatment for municipal wastewater. The plant operates under the National Pollutant Discharge Elimination System (NPDES) permit program, administered by the Wisconsin Department of Natural Resources, ensuring compliance with effluent limits and water quality standards. The treated effluent from COLFAX WWTP is discharged into a local waterway that ultimately drains into the Mississippi River Basin. The plant plays a key role in protecting the region's water quality, supporting downstream ecosystems and recreational uses in the Upper Mississippi River watershed.

COLFAX WWTP discharges into a local tributary that flows into the Chippewa River, a major tributary of the Mississippi River. The Chippewa River supports diverse aquatic life, including fish species such as walleye and smallmouth bass, and provides important habitat for migratory birds. The plant's secondary treatment helps reduce nutrient and organic pollutant loads, protecting downstream water quality in the Mississippi River Basin.