Winona WWTP - Advanced Wastewater Treatment in Winona, Missouri

Winona WWTP is a municipal wastewater treatment facility located in Winona, Shannon County, Missouri. The plant serves a small population of 1,338 residents, providing advanced treatment to protect local water quality. As an inland facility, it operates under the regulatory framework of the US Clean Water Act, which requires National Pollutant Discharge Elimination System (NPDES) permits for all discharges. The plant employs advanced treatment processes, which go beyond secondary treatment to remove nutrients and other pollutants. It has a designed capacity of 662.45 units and currently discharges 465.61 units, indicating operational capacity below its design limit. The plant's advanced treatment level aligns with best practices for protecting sensitive water bodies. The treated effluent is discharged into a local water body that ultimately drains into the Mississippi River basin. The plant's advanced treatment helps safeguard downstream aquatic ecosystems, including the diverse fish and invertebrate communities in the region's streams and rivers. Its location in the Ozark Plateau region means the plant plays a role in maintaining water quality in a ecologically sensitive area.

The plant discharges into a local water body that is part of the Mississippi River watershed. The Mississippi River system supports a wide range of aquatic life, including numerous fish species and migratory birds. The advanced treatment at Winona WWTP helps reduce nutrient loading, which is critical for preventing eutrophication in downstream waters, including the Gulf of Mexico hypoxic zone.