Nashville Dry Creek WWTP - Large Municipal Wastewater Treatment Plant in Nashville, Tennessee

Nashville Dry Creek WWTP is a municipal wastewater treatment facility located in Nashville, Davidson County, Tennessee. It serves an estimated population of 139,127, placing it in the large-agglomeration category under US regulatory standards. The plant is situated inland, more than 50 kilometers from the coast, and discharges into the Cumberland River watershed. As a US facility of this scale, the plant operates under the Clean Water Act and is subject to National Pollutant Discharge Elimination System (NPDES) permits issued by the Tennessee Department of Environment and Conservation. These permits set effluent limits for pollutants such as biochemical oxygen demand, total suspended solids, and nutrients. For large plants like this, secondary treatment is the minimum standard, with tertiary treatment often required to protect sensitive water bodies. The plant's treated effluent flows into the Cumberland River, which is a major tributary of the Ohio River, ultimately draining into the Mississippi River and the Gulf of Mexico. The Cumberland River supports diverse aquatic life and is used for recreation and drinking water downstream. The plant's discharge contributes to the overall water quality management of this important river system.

The plant discharges into the Cumberland River, which flows through Nashville and joins the Ohio River near Paducah, Kentucky, before reaching the Mississippi River and the Gulf of Mexico. The Cumberland River supports a variety of fish species and is an important migratory corridor for birds. The watershed includes urban, agricultural, and industrial areas, making nutrient and pollutant management critical for downstream water quality.