Hermitage Water Hardness & Quality Report (2026)

Hermitage, Tennessee, a community in the eastern portion of Nashville–Davidson County — a major Nashville eastern suburban community, home of The Hermitage (the historic plantation home of President Andrew Jackson — the 7th US President, located in Hermitage since 1804, now a major National Historic Landmark and museum), adjacent to the Lake Providence area and Old Hickory Lake on the Cumberland River, and a rapidly growing eastern Nashville–Davidson County community in the booming Nashville metro — draws its municipal water supply via Nashville Metro Water Services (MWS). Water hardness in Hermitage measures 116 mg/L — classified as moderately hard.

Hermitage's moderate hardness reflects the Cumberland River Nashville Dome watershed's calcareous geology and Nashville MWS distribution. The Cumberland River at Nashville drains through: the Ordovician Knox Dolomite (highly calcareous dolomite of the Nashville Dome — the major Ordovician carbonate of the Nashville Basin); the Mississippian St. Louis Limestone and Warsaw Formation (highly calcareous marine limestone of the Nashville Dome); and the Cambrian Rome Formation (calcareous shale and limestone). Nashville MWS treats and distributes to the Hermitage east Davidson zone, producing the moderate 116 mg/L.

At 116 mg/L, Hermitage residents encounter moderate scale accumulation. Monthly cleaning with citric acid solution is recommended. Nashville MWS consistently delivers water meeting all Tennessee TDEC and EPA Safe Drinking Water Act requirements.