TERRE HAUTE WWTP - Terre Haute, Indiana Wastewater Treatment Plant

TERRE HAUTE WWTP is a municipal wastewater treatment facility located in Terre Haute, Indiana, along South State Road 63. Serving an estimated population of 80,229, the plant is a key component of the city's infrastructure, managing wastewater from residential, commercial, and industrial sources in Vigo County. As a US facility, the plant operates under the Clean Water Act and is subject to National Pollutant Discharge Elimination System (NPDES) permits issued by the Indiana Department of Environmental Management. For a plant serving over 75,000 people, secondary treatment is the minimum standard, with potential requirements for nutrient removal to protect downstream water quality. The treated effluent is discharged into the Wabash River, which flows southwest to form part of the Indiana-Illinois border before joining the Ohio River. The Ohio River then drains into the Mississippi River and ultimately the Gulf of Mexico. The Wabash River supports diverse aquatic life and is an important ecological corridor in the region.

The plant discharges into the Wabash River, a major tributary of the Ohio River system. The Wabash River basin supports a variety of fish and wildlife, including several species of freshwater mussels and migratory birds. Downstream, the Ohio River flows into the Mississippi River, which empties into the Gulf of Mexico, contributing to the large hypoxic zone that forms annually. Nutrient management at plants like TERRE HAUTE WWTP is critical to reducing this downstream impact.