ANTIOCH STP Wastewater Treatment Plant, Antioch, Illinois

ANTIOCH STP is a municipal wastewater treatment plant located in Antioch, Illinois, serving a population of about 11,375. The facility is situated in Lake County, part of the Greater Chicago metropolitan area, and plays a key role in managing local wastewater. As a U.S. plant of this scale, ANTIOCH STP operates under the Clean Water Act, which requires secondary treatment as a baseline. The plant's designed capacity is 1.00 million gallons per day, indicating it is sized for a medium-sized community. Treatment processes typically include biological treatment and disinfection to meet National Pollutant Discharge Elimination System (NPDES) permit limits. The plant discharges treated effluent to a local waterway, likely a tributary of the Fox River or directly to the Fox River, which flows into the Illinois River and ultimately the Mississippi River. This watershed supports diverse aquatic life and is important for regional water quality. The plant's operations help protect downstream ecosystems and recreational uses.

ANTIOCH STP discharges into the Fox River watershed, which drains into the Illinois River and then the Mississippi River. This river system supports a variety of fish and wildlife, including migratory birds and aquatic species. The plant's effluent contributes to the flow of these rivers, and its treatment helps maintain water quality standards for recreation and habitat.