Scott County Regional Sewer Dist Wastewater Treatment Plant, Lexington, Indiana

Scott County Regional Sewer Dist is a municipal wastewater treatment plant located in Lexington, Scott County, Indiana, United States. It serves a small population of 410 residents, reflecting its role in a rural community. The plant provides secondary treatment, which is the standard level required under the U.S. Clean Water Act for municipal facilities. With a designed capacity of 189.27 megaliters per year and a discharge volume matching that figure, the plant operates at full capacity. As a small facility, it is subject to EPA NPDES permitting through the Indiana Department of Environmental Management. The treated effluent is discharged into local streams that drain into the Muscatatuck River, a tributary of the East Fork White River, which ultimately flows into the Wabash River and then the Ohio River. This watershed supports diverse aquatic life and provides habitat for fish and macroinvertebrates, making proper treatment essential for downstream water quality.

The plant discharges into local waterways that feed the Muscatatuck River, part of the Wabash River basin. The Wabash River flows into the Ohio River, which joins the Mississippi River and drains to the Gulf of Mexico. The watershed supports diverse aquatic ecosystems, including fish species such as bass and catfish, and is an important migratory corridor for waterfowl. Secondary treatment helps reduce organic pollutants and protect downstream water quality.