Moravia STL Wastewater Treatment Plant, Moravia, Iowa

Moravia STL is a municipal wastewater treatment plant located in Moravia, Iowa, United States. The plant serves a small population of 679 residents, typical of rural communities in the Midwest. It operates under the regulatory framework of the US Clean Water Act, which requires secondary treatment for municipal discharges. The plant provides secondary treatment, a standard biological process that removes organic matter and suspended solids. With a designed capacity of 189.27 megaliters and an annual discharge volume of 151.42 megaliters, the facility operates below its capacity, indicating adequate headroom for current flows. As a small inland plant, it is not subject to the more stringent nutrient removal requirements often applied to larger or coastal facilities. The treated effluent is discharged into a local waterway within the Mississippi River basin. The receiving water body supports aquatic life and contributes to the overall health of the Mississippi River system, which drains into the Gulf of Mexico. The plant's discharge is regulated under the National Pollutant Discharge Elimination System (NPDES) permit program, ensuring compliance with water quality standards.

The plant discharges into a local stream that flows into the Mississippi River basin, ultimately reaching the Gulf of Mexico. The downstream environment includes agricultural and rural areas, where maintaining water quality is important for aquatic habitats and recreational uses. The Mississippi River system supports diverse fish and wildlife, and nutrient loading from wastewater can contribute to hypoxia in the Gulf, making proper treatment essential.