Chrisman STP - Advanced Wastewater Treatment Plant in Chrisman, Illinois

Chrisman STP is a municipal wastewater treatment facility located in Chrisman, Illinois, a small community in Edgar County. The plant serves a population of approximately 1,318 residents and operates with advanced treatment capabilities, ensuring high-quality effluent before discharge. The plant's advanced treatment level goes beyond standard secondary treatment, typically incorporating nutrient removal or filtration processes. With a designed capacity of 643.52 million gallons per year and an actual discharge volume of 348.26 million gallons per year, the plant operates well within its capacity. As a US facility, it operates under the Clean Water Act and is subject to National Pollutant Discharge Elimination System (NPDES) permitting, which sets effluent limits to protect water quality. The treated effluent is discharged into a local receiving water body, which ultimately drains into the Wabash River basin and then the Ohio River, part of the Mississippi River system. The plant plays a key role in protecting downstream aquatic ecosystems and maintaining water quality in the region's waterways.

The plant discharges into a local stream that flows into the Wabash River, a major tributary of the Ohio River. The Wabash River supports diverse aquatic life and is an important migratory corridor for fish. Downstream, the Ohio River feeds into the Mississippi River, which drains into the Gulf of Mexico. The plant's advanced treatment helps reduce nutrient loading, which is critical for preventing hypoxia in the Gulf.