ALLERTON SOUTH LAGOON Wastewater Treatment Plant, Wayne County, Iowa

ALLERTON SOUTH LAGOON is a wastewater treatment facility located in Wayne County, Iowa, United States. It serves a small population of 494 residents, reflecting its role in a rural community. The plant is situated inland, far from coastal areas, and operates under the regulatory framework of the U.S. Clean Water Act. The plant employs advanced treatment processes, which go beyond secondary treatment to remove nutrients and other pollutants. Its designed capacity is 794.93 megaliters, with an actual discharge volume of 189.27 megaliters, indicating ample capacity for current demand. As a U.S. facility, it is subject to National Pollutant Discharge Elimination System (NPDES) permits issued by the Iowa Department of Natural Resources, ensuring compliance with water quality standards. The treated effluent is discharged into local waterways that drain into the Mississippi River basin, ultimately reaching the Gulf of Mexico. This contributes to the ecological health of downstream aquatic habitats, including wetlands and rivers that support diverse fish and bird species. The advanced treatment helps reduce nutrient loading, which is critical for mitigating hypoxia in the Gulf.

The plant's discharge enters local streams that flow into the Mississippi River basin, eventually reaching the Gulf of Mexico. This watershed supports a variety of aquatic life, including fish, mussels, and migratory birds. Advanced treatment at the plant helps minimize nutrient pollution, which is a key factor in preventing algal blooms and maintaining water quality in downstream ecosystems.