Windsor Sewerage System - Wastewater Treatment in Windsor, Illinois

The Windsor Sewerage System is a municipal wastewater treatment facility located in Windsor, Illinois, United States. Serving a population of around 1,178, the plant provides secondary treatment to meet state and federal water quality standards under the Clean Water Act. The plant has a designed capacity of 567.81 and a discharge volume of 454.25, indicating it operates below its full capacity. As a small community facility, it is subject to EPA National Pollutant Discharge Elimination System (NPDES) permitting, which sets effluent limits to protect receiving waters. The treated wastewater is discharged into local waterways that ultimately drain into the Mississippi River basin. The plant plays a key role in protecting downstream water quality and aquatic ecosystems in this agricultural region of central Illinois.

The treated effluent from the Windsor Sewerage System enters local streams that flow into the Kaskaskia River, a tributary of the Mississippi River. The Mississippi River basin supports diverse aquatic life and provides drinking water for millions. The plant's secondary treatment helps reduce nutrient and pathogen loads, protecting downstream habitats and recreational uses.