ST PAUL WWTP - Decatur County, Indiana Wastewater Treatment Plant

ST PAUL WWTP is a municipal wastewater treatment facility located in Decatur County, Indiana, United States. The plant serves a small community of approximately 1,031 people, providing essential wastewater treatment services for the area. The plant operates with secondary treatment, which is the standard level required by the US Clean Water Act for municipal facilities. It has a designed capacity of 567.81 and a current discharge volume of 423.97, indicating it operates below its full capacity. As a US facility, it is regulated under the National Pollutant Discharge Elimination System (NPDES) permit program, which sets effluent limits to protect water quality. The treated effluent is discharged into local streams that are part of the Mississippi River basin, ultimately draining into the Gulf of Mexico. The plant plays a key role in protecting downstream aquatic ecosystems by reducing pollutant loads from the community.

The plant discharges into tributaries of the Mississippi River basin, which flows into the Gulf of Mexico. This region supports diverse aquatic life and is part of a larger watershed that faces challenges from nutrient pollution. The plant's secondary treatment helps reduce organic matter and suspended solids, contributing to the health of downstream waters.