McNabb Village of Wastewater Treatment Plant, Putnam County, Illinois

The McNabb Village of wastewater treatment plant is located in Putnam County, Illinois, United States, serving a small community of 372 residents. The facility provides secondary treatment, a standard level for small agglomerations under the US Clean Water Act, which requires municipal wastewater treatment plants to meet effluent limits based on secondary treatment standards. The plant has a designed capacity of 140.06 volume units and a discharge volume of 105.99, indicating operational capacity within design parameters. As a publicly owned treatment works (POTW), it operates under the National Pollutant Discharge Elimination System (NPDES) permit program, administered by the Illinois Environmental Protection Agency, ensuring compliance with water quality standards. The treated effluent is discharged into local streams that flow into the Illinois River, a major tributary of the Mississippi River. The Illinois River basin supports diverse aquatic life and is an important migratory corridor for waterfowl. The plant's secondary treatment helps protect downstream water quality and ecological health in the region.

The plant discharges into local waterways that drain into the Illinois River, which flows southwest to join the Mississippi River near Grafton, Illinois. The Illinois River basin is ecologically significant, supporting diverse fish and bird species, including migratory waterfowl along the Mississippi Flyway. The watershed is influenced by agricultural runoff and urban development, making effective wastewater treatment crucial for maintaining water quality and aquatic habitat.