PHELPS SD 1 STP - Advanced Wastewater Treatment in Town of Phelps, Wisconsin

PHELPS SD 1 STP serves the Town of Phelps in Vilas County, Wisconsin, a small community in the Northwoods region. The plant treats wastewater from approximately 900 residents, reflecting its role as a small-scale municipal facility in a rural, lake-rich area. The plant employs advanced treatment processes, which go beyond standard secondary treatment to remove nutrients and other pollutants. With a designed capacity of 435.32 thousand gallons per day and an average daily flow of 257.41 thousand gallons per day, it operates well within its capacity. Under the U.S. Clean Water Act, such facilities must comply with National Pollutant Discharge Elimination System (NPDES) permits, which set effluent limits to protect water quality. The treated effluent is discharged into local surface waters, likely tributaries of the Wisconsin River basin or directly into one of the many lakes in Vilas County. The region is known for its pristine lakes and forests, making advanced treatment crucial for preserving aquatic ecosystems and recreational water quality. The plant's performance helps maintain the ecological health of downstream waters, which ultimately drain into the Mississippi River system.

The plant discharges into local streams and lakes within the headwaters of the Wisconsin River basin, a major tributary of the Mississippi River. The area features numerous glacial lakes and wetlands that support diverse aquatic life, including fish species like walleye and muskellunge. Advanced treatment ensures that nutrient and pollutant loads are minimized, protecting sensitive ecosystems and recreational uses such as fishing and boating.