Postville WWTP - Municipal Wastewater Treatment in Postville, Iowa

Postville WWTP is a municipal wastewater treatment facility located in Postville, Iowa, serving a population of approximately 2,385 residents. The plant is situated in Allamakee County, within the Upper Mississippi River Basin, and plays a key role in managing local wastewater for this small agglomeration. As a U.S. facility, Postville WWTP operates under the National Pollutant Discharge Elimination System (NPDES) permit program, which sets effluent limits and monitoring requirements. For a plant serving a population of this size, secondary treatment is typically required under the Clean Water Act to reduce organic matter and suspended solids before discharge. The treated effluent from Postville WWTP is discharged into a receiving water body that ultimately flows into the Mississippi River, a major waterway that drains into the Gulf of Mexico. The plant's operations help protect local water quality and downstream ecosystems, including the diverse aquatic life supported by the Mississippi River system.

Postville WWTP discharges into a local waterway that is part of the Upper Mississippi River Basin. The Mississippi River is a critical ecological corridor supporting diverse fish, bird, and plant species. Downstream, the river flows into the Gulf of Mexico, where nutrient pollution can contribute to hypoxic zones. Effective treatment at Postville WWTP helps reduce nutrient loads and protect these downstream environments.