DIXON WWTP - Secondary Treatment Plant in Dixon, Iowa

DIXON WWTP is a municipal wastewater treatment facility located on Hoffman Lane in Dixon, Scott County, Iowa. The plant serves a small population of 202 residents, reflecting the rural character of the community. As a secondary treatment plant, it provides biological treatment to reduce organic pollutants and suspended solids before discharge. The plant operates under the U.S. Clean Water Act, which requires National Pollutant Discharge Elimination System (NPDES) permits for all point source discharges. For small agglomerations like Dixon, secondary treatment is the standard requirement, ensuring compliance with federal effluent guidelines. The plant's designed capacity of 151.42 thousand cubic meters per year indicates it is sized to handle current and modest future flows. The treated effluent is discharged into a local waterway 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 discharge contributes to the overall water quality management in the region, with secondary treatment providing significant pollutant removal to protect downstream ecosystems.

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 an important migratory route for waterfowl. The plant's secondary treatment helps reduce nutrient and organic loads, mitigating potential impacts on downstream water quality and the hypoxic zone in the Gulf.