Aviston STP - Advanced Wastewater Treatment Plant in Aviston, Illinois

Aviston STP is a wastewater treatment facility located in Aviston, Clinton County, Illinois, United States. The plant serves a population of around 900 residents, providing essential sanitation services for this small community in the Midwestern region. The plant employs advanced treatment processes, ensuring a high level of effluent quality. With a designed capacity of 454.25 megaliters and an annual discharge volume of 340.69 megaliters, the facility operates well within its capacity. As a US plant, it operates under the Clean Water Act, with National Pollutant Discharge Elimination System (NPDES) permits issued by the Illinois Environmental Protection Agency, which set strict limits on pollutant discharges. The treated effluent from Aviston STP is discharged into local waterways that ultimately drain into the Mississippi River basin. This river system supports diverse aquatic life and provides drinking water for millions downstream. The plant's advanced treatment helps protect water quality in this ecologically significant watershed.

Aviston STP discharges into tributaries of the Kaskaskia River, which flows into the Mississippi River. The Mississippi River basin is a major ecological corridor supporting numerous fish species, migratory birds, and other wildlife. The advanced treatment at this plant helps reduce nutrient loading and protects downstream water quality in this important river system.