John E Egan WRP - Cook County, Illinois Wastewater Treatment Plant

John E Egan WRP is a major wastewater treatment facility located in Schaumburg Township, Cook County, Illinois. Serving a population of around 285,000, it is one of the larger treatment plants in the Chicago metropolitan area. The plant is situated in an urbanized region with significant residential and commercial development. As a large-scale facility, John E Egan WRP operates under the regulatory framework of the U. S. Clean Water Act, administered through the National Pollutant Discharge Elimination System (NPDES) permit program. The Illinois Environmental Protection Agency (IEPA) oversees permit compliance for plants of this size, which typically require advanced treatment to meet water quality standards for the receiving waters. The plant's treated effluent is discharged into local streams that ultimately flow into the Des Plaines River and then to the Illinois River, a major tributary of the Mississippi River. This drainage system supports diverse aquatic life and provides water for downstream communities. The plant plays a key role in protecting water quality in the greater Chicago area and the Mississippi River basin.

The plant discharges into the Des Plaines River watershed, which flows into the Illinois River and then the Mississippi River. This river system supports a wide range of aquatic species and is an important migratory corridor for fish and birds. The downstream environment includes ecologically sensitive areas such as wetlands and floodplains that benefit from effective wastewater treatment.