DECATUR STP - Decatur, Tennessee Wastewater Treatment Plant

DECATUR STP is a municipal wastewater treatment plant located in Decatur, Meigs County, Tennessee, United States. The facility serves a population of 1,065 and operates under the regulatory framework of the US Clean Water Act, which requires secondary treatment for municipal wastewater discharges. The plant provides secondary treatment, a standard biological process that removes organic matter and suspended solids. With a designed capacity of 1287.04 units and a daily discharge volume of 984.21 units, the plant operates below its capacity, indicating adequate headroom for current demand. The treated effluent is discharged into a local water body that ultimately drains into the Tennessee River system, which flows into the Ohio River and then the Mississippi River. This watershed supports diverse aquatic life and provides water resources for communities downstream.

The plant discharges into a tributary of the Tennessee River, which flows through the southeastern United States before joining the Ohio River. The Tennessee River watershed is ecologically significant, supporting diverse fish species and providing habitat for migratory birds. Downstream, the river system contributes to the Mississippi River basin, which empties into the Gulf of Mexico. The plant's secondary treatment helps protect local water quality in this sensitive riverine environment.