SULLIVAN WWTP - Cass, Indiana Wastewater Treatment Plant

SULLIVAN WWTP is a municipal wastewater treatment facility located in Cass, Sullivan County, Indiana. It serves a population of about 4,482 people, typical of a small community in the Midwestern United States. The plant is situated near State Route 54 in Scotchtown, within the Wabash River watershed. As a U.S. facility, SULLIVAN WWTP operates under the Clean Water Act, administered by the U.S. EPA and the Indiana Department of Environmental Management. Plants of this scale are generally required to provide secondary treatment, which removes at least 85% of organic matter and suspended solids. The facility's discharge is regulated through a National Pollutant Discharge Elimination System (NPDES) permit, ensuring compliance with water quality standards. The plant's treated effluent flows into local streams that drain into the Wabash River, a major tributary of the Ohio River. The Wabash River supports diverse aquatic life and is an important ecological corridor in the region. The plant's operations help protect downstream water quality and the health of the river ecosystem.

SULLIVAN WWTP discharges into tributaries of the Wabash River, which flows southwest to join the Ohio River, ultimately reaching the Mississippi River and the Gulf of Mexico. The Wabash River basin supports a variety of fish and wildlife, including several species of freshwater mussels. The plant's treatment processes help maintain water quality in this ecologically significant watershed.