DICKSON STP - Wastewater Treatment Plant in Dickson County, Tennessee

DICKSON STP is a municipal wastewater treatment plant located in Dickson County, Tennessee, serving a population of about 19,274 residents. The facility is situated in Middle Tennessee, an inland region characterized by rolling hills and a humid subtropical climate. As a publicly owned treatment works, it plays a key role in managing wastewater from the county's residential and commercial sectors. Under the U.S. Clean Water Act, plants serving populations between 10,000 and 100,000 are typically required to provide secondary treatment, which removes at least 85% of biochemical oxygen demand and suspended solids. The plant's scale suggests it meets these federal standards, with oversight from the Tennessee Department of Environment and Conservation (TDEC) through the National Pollutant Discharge Elimination System (NPDES) permitting program. The plant discharges treated effluent into local waterways that drain into the Cumberland River basin, ultimately flowing to the Ohio River and then the Mississippi River. This downstream connection to the Gulf of Mexico underscores the importance of effective nutrient removal to prevent hypoxia in the Gulf. The facility's location in a largely rural area means it helps protect local streams and groundwater from untreated sewage, supporting aquatic habitats and recreational uses.

DICKSON STP discharges into tributaries of the Cumberland River, which flows into the Ohio River and then the Mississippi River before reaching the Gulf of Mexico. The local watershed supports diverse aquatic life, including fish and macroinvertebrates, and provides drinking water for downstream communities. Effective treatment is critical to prevent nutrient pollution that can contribute to algal blooms and hypoxic zones in the Gulf.