ANDOVER STL Wastewater Treatment Plant, Andover, Iowa

ANDOVER STL is a municipal wastewater treatment plant located on 140th Street in Andover, a small community in Clinton County, Iowa. The plant serves a population of 99, classifying it as a very small facility within the state's wastewater infrastructure. The plant provides secondary treatment, which is the standard level required by the U.S. Clean Water Act for municipal wastewater. Its designed capacity is 37.85 units, matching the current discharge volume, indicating full utilization. As a small plant in Iowa, it likely operates under an NPDES permit issued by the Iowa Department of Natural Resources, ensuring compliance with effluent limits. The treated effluent is discharged into a local water body that ultimately drains into the Mississippi River basin. The Mississippi River is a major ecological corridor supporting diverse aquatic life and migratory birds. The plant's operations contribute to protecting downstream water quality in this nationally significant watershed.

The plant discharges into a tributary of the Mississippi River, which flows south to the Gulf of Mexico. The Mississippi River basin supports a wide range of aquatic species and is a critical migratory route for birds. The plant's secondary treatment helps reduce nutrient and pollutant loads, protecting downstream ecosystems from eutrophication and habitat degradation.