DU QUOIN STP - Du Quoin, Illinois Wastewater Treatment Plant

DU QUOIN STP is a municipal wastewater treatment plant located in Du Quoin, Perry County, Illinois. Serving a population of about 8,809, the facility is part of the region's infrastructure for managing domestic wastewater. The plant is situated inland, more than 50 km from the coast, and its operations are subject to state and federal environmental standards. As a U.S. facility, DU QUOIN STP operates under the Clean Water Act, which requires National Pollutant Discharge Elimination System (NPDES) permits for all discharges. Regulatory compliance ensures that effluent meets water quality standards. The treated wastewater from DU QUOIN STP is discharged into local receiving waters, which ultimately drain into the Mississippi River Basin. This river system supports diverse aquatic life and provides water for communities downstream. The plant's operations are critical for protecting the water quality of these regional waterways.

DU QUOIN STP discharges into local streams that flow into the Big Muddy River, a tributary of the Mississippi River. The Mississippi River Basin is a major ecological corridor supporting fish, migratory birds, and other wildlife. The plant's effluent must meet standards to prevent nutrient pollution and protect downstream aquatic habitats.