Fox Lake Tall Oaks STP - Advanced Wastewater Treatment in Fox Lake, Illinois

Fox Lake Tall Oaks STP is an advanced wastewater treatment facility located in Fox Lake, Illinois, within Lake County. The plant serves a small population of approximately 1,000 residents, providing advanced treatment to protect local water quality. As an advanced treatment plant, it goes beyond secondary treatment standards to remove nutrients and other pollutants. The plant has a designed capacity of 1,892.70 thousand gallons per day and currently discharges 567.81 thousand gallons per day. Under the U.S. Clean Water Act, such facilities operate under National Pollutant Discharge Elimination System (NPDES) permits issued by the Illinois Environmental Protection Agency, which set effluent limits to safeguard receiving waters. The plant's treated effluent likely discharges to a nearby water body within the Fox River watershed, which flows into the Illinois River and ultimately the Mississippi River. This drainage basin supports diverse aquatic life and provides drinking water for downstream communities. Advanced treatment helps reduce nutrient loading, which is critical for preventing algal blooms in the Mississippi River Basin and the Gulf of Mexico hypoxic zone.

The plant is situated inland in the Fox River watershed, which drains into the Illinois River and then the Mississippi River. The Mississippi River Basin is ecologically significant, supporting a wide range of fish and wildlife species. Advanced treatment at this plant helps minimize nutrient pollution that can contribute to downstream eutrophication and the seasonal hypoxic zone in the Gulf of Mexico.