Pinckneyville STP 1 Wastewater Treatment Plant, Pinckneyville, Illinois

Pinckneyville STP 1 is a municipal wastewater treatment plant located at 338 Waterworks Road in Pinckneyville, Perry County, Illinois. The plant serves a population of approximately 2,993 residents, classifying it as a small community facility within the state's wastewater infrastructure. As a US-based plant, Pinckneyville STP 1 operates under the Clean Water Act, which requires National Pollutant Discharge Elimination System (NPDES) permits for all point source discharges. The plant discharges treated wastewater into local waterways that ultimately drain into the Mississippi River basin. This region supports diverse aquatic life and provides important ecosystem services, including water purification and habitat for fish and wildlife. The plant's operations contribute to maintaining the health of downstream water bodies.

The plant's treated effluent flows into local streams within the Mississippi River watershed, one of the largest drainage basins in North America. This river system supports a wide range of aquatic species and provides critical habitat for migratory birds and fish. The downstream environment includes ecologically sensitive areas that benefit from regulated wastewater treatment to prevent nutrient pollution and maintain water quality.