Fox Metro Water Reclamation District - Montgomery, Illinois Wastewater Treatment

Fox Metro Water Reclamation District is a major wastewater treatment facility located in Montgomery, Illinois, serving a population of approximately 273,451. The plant is situated in Kendall County within the Fox River Valley, an area characterized by suburban and industrial development. As a large-scale municipal treatment works, it plays a critical role in managing wastewater for the surrounding communities. Under the US Clean Water Act, large publicly owned treatment works (POTWs) like Fox Metro are required to meet secondary treatment standards as a minimum, with more stringent limits possible for nutrient removal in sensitive watersheds. The facility operates under a National Pollutant Discharge Elimination System (NPDES) permit issued by the Illinois Environmental Protection Agency, which sets effluent limits to protect water quality. Plants of this scale typically employ advanced biological treatment and disinfection. The treated effluent is discharged into the Fox River, which flows southward to the Illinois River and ultimately the Mississippi River. This watershed supports diverse aquatic life and is used for recreation and drinking water downstream. The plant's operations are essential for maintaining water quality in the Fox River and preventing nutrient pollution that could contribute to hypoxia in the Gulf of Mexico.

The plant discharges into the Fox River, a tributary of the Illinois River, which flows into the Mississippi River and eventually the Gulf of Mexico. The Fox River watershed supports a variety of fish species and provides habitat for migratory birds. Nutrient loading from wastewater can contribute to algal blooms and oxygen depletion, making effective treatment critical for downstream ecosystems.