Theresa WWTP - Advanced Wastewater Treatment in Theresa, Wisconsin

Theresa WWTP is a municipal wastewater treatment plant located at 574 McArthur Road in Theresa, Dodge County, Wisconsin. The facility serves a population of approximately 1,259 residents, classifying it as a small-scale treatment operation within the state's wastewater infrastructure. The plant employs advanced treatment processes, which go beyond secondary treatment to remove nutrients and other pollutants. With a designed capacity of 764.65 cubic meters per day and a current discharge volume of 579.17 cubic meters per day, the facility operates below its capacity, indicating room for future growth. As a US plant, it operates under the Clean Water Act, with National Pollutant Discharge Elimination System (NPDES) permits issued by the Wisconsin Department of Natural Resources. The treated effluent is discharged into the local watershed, which flows through the Rock River basin and ultimately into Lake Michigan. This connection to the Great Lakes ecosystem underscores the plant's role in protecting water quality in a region valued for recreation, drinking water, and aquatic habitat.

The plant discharges into the Rock River basin, which drains into the Mississippi River system and eventually reaches the Gulf of Mexico. The receiving waters support diverse aquatic life, including fish species such as walleye and bass, and are important for regional biodiversity. The advanced treatment helps reduce nutrient loading, which is critical for preventing eutrophication in downstream water bodies.