CORNERSVILLE STP - Secondary Wastewater Treatment Plant in Cornersville, Tennessee

CORNERSVILLE STP is a municipal wastewater treatment plant located on New Ostella Road in Cornersville, Marshall County, Tennessee. Serving a population of approximately 962, this facility is part of the region's infrastructure for managing domestic wastewater in a rural setting. The plant provides secondary treatment, a standard level required by the U.S. Clean Water Act for municipal facilities. With a designed capacity of 378.54 megaliters per year and a discharge volume of 340.69 megaliters per year, it operates at about 90% capacity. As a U.S. facility, it operates under a National Pollutant Discharge Elimination System (NPDES) permit issued by the Tennessee Department of Environment and Conservation, which sets effluent limits to protect water quality. The treated effluent is discharged into a receiving water body within the Tennessee River basin, which ultimately drains into the Ohio River and then the Mississippi River. The plant plays a key role in protecting local streams and downstream aquatic ecosystems from nutrient pollution and pathogens, supporting biodiversity in the region.

The plant discharges into a local stream that flows into the Tennessee River basin, a major tributary of the Ohio and Mississippi Rivers. This watershed supports diverse aquatic life, including fish and macroinvertebrates, and provides drinking water for downstream communities. The plant's secondary treatment helps reduce organic pollutants and suspended solids, mitigating eutrophication risks in downstream reservoirs.