Rock River WRD Wastewater Treatment Plant, Rockford, Illinois

Rock River WRD is a major wastewater treatment facility located in Rockford, Illinois, serving a population of about 189,000. As a large municipal plant, it plays a critical role in managing wastewater for the Rockford metropolitan area. Plants of this scale in the United States typically operate under the Clean Water Act, requiring secondary treatment as a minimum. The facility is likely regulated by the Illinois Environmental Protection Agency (IEPA) through an NPDES permit, ensuring compliance with discharge standards. The treated effluent is discharged into the Rock River, which flows southwest to join the Mississippi River near the Quad Cities. This river system supports diverse aquatic life and is an important waterway for the region. The plant's operations are vital for protecting water quality in the Rock River watershed and downstream ecosystems.

The Rock River flows through northern Illinois before merging with the Mississippi River, a major continental waterway. The watershed supports diverse fish populations and provides habitat for migratory birds. The plant's discharge contributes to the river's flow, and its treatment level is crucial for maintaining water quality in this ecologically sensitive river system.