Frankfort North STP - Will County, Illinois Wastewater Treatment Plant

Frankfort North STP is a municipal wastewater treatment facility located in Will County, Illinois, serving a population of approximately 7,082 residents. The plant is situated in the Court Homes of Frankfort Square area, near Hilda Walker Middle School on Mary Drew Parkway. As a small-to-medium agglomeration, it plays a key role in managing local wastewater in this suburban community. The plant operates under the US Clean Water Act, which requires secondary treatment as a minimum for municipal facilities. The designed capacity is 1.00 million gallons per day, indicating the plant's scale. Compliance with National Pollutant Discharge Elimination System (NPDES) permits is standard for such facilities, ensuring effluent quality standards are met. The plant's treated effluent discharges into local waterways that ultimately drain into the Mississippi River basin. This watershed supports diverse aquatic life and provides drinking water for downstream communities. The plant's operation helps protect water quality in the region, reducing nutrient and pollutant loads that could impact the broader Illinois River system and the Gulf of Mexico.

The plant discharges into the Mississippi River basin, which flows into the Gulf of Mexico. This watershed is ecologically significant, supporting diverse fish and wildlife habitats. Downstream areas include the Illinois River, a major tributary that contributes to the Mississippi's nutrient load, affecting the Gulf's hypoxic zone. The plant's treatment helps mitigate local impacts on water quality and aquatic ecosystems.