Gibson City STP - Wastewater Treatment Plant in Gibson City, Illinois

Gibson City STP is a municipal wastewater treatment plant located at 564 West 1st Street in Gibson City, Illinois, serving a population of about 3,520. The plant is situated in Ford County, within the central region of the state, and is part of the local infrastructure managed by the city. As a small agglomeration under US regulations, the plant is subject to the National Pollutant Discharge Elimination System (NPDES) permitting program, which sets effluent limits based on water quality standards. For plants of this scale, secondary treatment is typically required to meet federal standards for biochemical oxygen demand and total suspended solids. The treated effluent from Gibson City STP is discharged into a local waterway that eventually drains into the Vermilion River system, a tributary of the Wabash River, which flows to the Ohio River and ultimately the Mississippi River. This watershed supports diverse aquatic life and provides recreational opportunities in the region.

The plant discharges into a local stream that is part of the Vermilion River watershed, which flows into the Wabash River, then the Ohio River, and finally the Mississippi River. The receiving waters support a variety of fish and macroinvertebrate species, and the plant's discharge must comply with state water quality standards to protect aquatic habitats and downstream uses.