GALESVILLE WWTP - Town of Caledonia, Wisconsin Wastewater Treatment Plant

GALESVILLE WWTP is a municipal wastewater treatment facility located on Cooper Road in the Town of Caledonia, Trempealeau County, Wisconsin. The plant serves a population of approximately 1,668 residents, reflecting a small community in the rural Upper Midwest. Its location near the Mississippi River places it within a region where water quality management is critical for downstream ecosystems. The plant provides secondary treatment, which is the standard level required by the U.S. Clean Water Act for municipal facilities of this scale. Secondary treatment typically involves biological processes to remove organic matter and suspended solids. The plant has a designed capacity of 1,268.11 thousand cubic meters per year and currently discharges an average volume of 533.74 thousand cubic meters annually, indicating operational headroom. Treated effluent from the plant enters local waterways that flow into the Mississippi River, a major continental waterway that drains into the Gulf of Mexico. The Mississippi River supports diverse aquatic life and is a vital migratory corridor for birds and fish. The plant's operations are subject to National Pollutant Discharge Elimination System (NPDES) permits issued by the Wisconsin Department of Natural Resources, ensuring compliance with water quality standards.

The plant discharges into tributaries of the Mississippi River, which flows southward to the Gulf of Mexico. This watershed supports a variety of fish species, including catfish and walleye, and provides habitat for migratory waterfowl. The Mississippi River is a critical ecological corridor, and nutrient loading from upstream sources can contribute to hypoxic zones in the Gulf. The plant's secondary treatment helps reduce organic pollutants, but nutrient removal may be limited without advanced treatment.