Hermitage Water Hardness & Quality Report (2026)

Nashville Metro Water Services supplies Hermitage, Tennessee, in Davidson County, as part of the greater Nashville metro area. Water primarily comes from the Cumberland River via the J. Percy Priest Reservoir, supplemented by groundwater from the Eastern Highland Rim aquifer. Treatment occurs at the Omni and K.R. Harrington plants, serving over 700,000 customers across Nashville and its suburbs, including Hermitage. The service area encompasses the broader Nashville metropolitan region of central Tennessee, with water delivered through an extensive distribution network to residential and commercial customers.

The Cumberland River watershed drains the Nashville Basin, featuring karst landscapes with Ordovician-age limestones such as the Carters and Lebanon formations, which dissolve to impart minerals and create a moderately mineralized supply. Blended with aquifer water from the less reactive sediments of the Eastern Highland Rim, the geology results in water with notable but not extreme dissolved solids, typical of Tennessee's varied carbonate terrain and the influence of the underlying Knox Group and Chattanooga Shale.

Moderately hard water promotes scale on faucets, showerheads, and dishwashers, with moderate buildup on water heaters and washing machines; energy costs rise slightly from heating element scaling, and skin may feel drier with less efficient soap lathering. Regular vinegar descaling helps manage deposits; a water softener is recommended for households with hard water concerns to extend appliance life and improve cleaning. Nashville's water meets all federal standards per annual reports, with pH typically 7.2–7.8; lead and copper levels comply via corrosion control; no notable PFAS exceedances reported; treatment includes coagulation, filtration, chloramine disinfection, and fluoride addition; occasional manganese or iron tastes from river sources pose no health risk.