STREATOR STP Wastewater Treatment Plant, Streator, Illinois

STREATOR STP is a municipal wastewater treatment plant located in Streator, Illinois, within LaSalle County. The facility serves a population of about 14,752, classifying it as a medium-sized agglomeration under U.S. regulatory frameworks. It is situated inland, more than 50 kilometers from the nearest coast, and discharges into the local watershed. As a U.S. plant, STREATOR STP operates under the Clean Water Act, administered by the Illinois Environmental Protection Agency. The National Pollutant Discharge Elimination System (NPDES) permit program governs its discharge limits and monitoring requirements. The plant's design capacity and flow data are not disclosed in public records. The plant's treated effluent enters the Vermilion River watershed, which flows into the Illinois River and ultimately the Mississippi River. This drainage basin supports diverse aquatic life and provides water for agricultural and municipal uses downstream. The plant's performance is critical to maintaining water quality in this ecologically significant river system.

STREATOR STP discharges into the Vermilion River, a tributary of the Illinois River, which flows into the Mississippi River. The watershed supports diverse aquatic species, including fish and macroinvertebrates, and is an important migratory corridor for birds. The plant's effluent quality directly affects downstream ecosystems, including the Illinois River's backwater lakes and wetlands, which provide critical habitat for waterfowl and fish spawning.