Somerville Lagoon Wastewater Treatment Plant, Somerville, Tennessee

Somerville Lagoon is a wastewater treatment facility located in Somerville, Fayette County, Tennessee, serving a population of approximately 1,500 residents. The plant is situated in West Tennessee, an inland region with a humid subtropical climate. As a small-scale facility, Somerville Lagoon is subject to the U.S. Clean Water Act and National Pollutant Discharge Elimination System (NPDES) permitting requirements. For communities of this size, lagoon systems are a common treatment approach, providing secondary treatment through natural biological processes. Typical lagoon systems in Tennessee are designed for effective organic removal and nutrient reduction. The plant discharges treated effluent into local waterways that drain into the Mississippi River basin, ultimately reaching the Gulf of Mexico. This downstream connection underscores the importance of proper treatment to protect water quality in the broader watershed.

The plant's treated effluent flows into tributaries of the Mississippi River, which drains into the Gulf of Mexico. The region's watershed supports diverse aquatic life and is part of the Mississippi Flyway, an important migratory corridor for birds. Proper wastewater treatment helps reduce nutrient loading that can contribute to hypoxic zones in the Gulf.