WITT STP - Advanced Wastewater Treatment Plant in Witt, Illinois

WITT STP is a municipal wastewater treatment facility located in Witt, Illinois, within Montgomery County. The plant serves a population of approximately 1,000 residents, providing advanced treatment to protect local water quality. As an advanced treatment plant, WITT STP employs processes that go beyond secondary treatment to remove nutrients and other pollutants. With a designed capacity of 492.10 units and a current discharge volume of 416.40 units, the plant operates well within its capacity. Under the U.S. Clean Water Act, such facilities are regulated through National Pollutant Discharge Elimination System (NPDES) permits issued by the Illinois Environmental Protection Agency. The plant discharges treated effluent into a local water body, contributing to the protection of the Mississippi River watershed. The surrounding area is primarily rural and agricultural, making the plant's advanced treatment important for preventing nutrient pollution in downstream ecosystems.

WITT STP discharges into a local stream that ultimately flows into the Mississippi River basin. The Mississippi River is a major waterway that drains into the Gulf of Mexico, where nutrient pollution contributes to seasonal hypoxic zones. The plant's advanced treatment helps reduce nitrogen and phosphorus loads, supporting the health of downstream aquatic habitats.