DUPONT STP Wastewater Treatment Plant, Jefferson County, Indiana

DUPONT STP is a municipal wastewater treatment plant located in Jefferson County, Indiana, United States. The facility serves a small population of 392 residents, reflecting its role in a rural or small community setting. The plant operates under the regulatory framework of the U.S. Clean Water Act, which governs wastewater discharges through National Pollutant Discharge Elimination System (NPDES) permits. The plant employs advanced treatment processes, which go beyond secondary treatment to remove additional pollutants such as nutrients or pathogens. With a designed capacity of 264.98 megaliters per year and an actual discharge volume of 151.42 megaliters per year, the plant operates below its capacity, indicating room for future growth or seasonal variations. The facility is located inland, more than 50 kilometers from the nearest coast, reducing direct marine impact. The treated effluent is discharged into a local water body, likely a stream or river within the Ohio River basin. The Ohio River eventually flows into the Mississippi River and then to the Gulf of Mexico. The plant's advanced treatment helps protect downstream water quality and aquatic ecosystems in this important watershed.

The plant discharges into a local water body that is part of the Ohio River basin. The Ohio River flows into the Mississippi River, which ultimately reaches the Gulf of Mexico. This watershed supports diverse aquatic life and provides drinking water for millions. The advanced treatment at DUPONT STP helps reduce nutrient loading, which is critical for preventing eutrophication in downstream waters, including the Gulf of Mexico's hypoxic zone.