Greeneville Water Hardness & Quality Report (2026)

Greeneville, Tennessee, in Greene County — the Greene County seat adjacent to Tusculum and Mosheim on the Nolichucky River in northeast Tennessee — receives its municipal water from Greeneville Light and Power, drawing from Davy Crockett Lake (Nolichucky River, Greene County) through the northeast Tennessee water treatment system.

The moderately hard 119 mg/L hardness and TDS of 204.9 mg/L reflect the northeast Tennessee Nolichucky River supply's moderate Blue Ridge-Valley and Ridge character — between the soft Blue Ridge crystalline communities and the hard Ordovician limestone Tennessee Valley communities. The Nolichucky River at Greene County drains the Unaka Mountains — Precambrian Cranberry Gneiss (insoluble), Cambrian Unicoi Formation (slightly calcareous quartzite — minor hardness contributor), and Cambrian Shady Dolomite (calcareous-dolomitic — primary hardness contributor at the Valley transition zone). The Cambrian dolomite transition zone produces the moderately hard northeast Tennessee supply.

At 119 mg/L, Greeneville's water is moderately hard — scale builds in kettles and appliances over months, dishwashers benefit from rinse aid, and faucet aerators need periodic cleaning. Quarterly descaling is appropriate. The PFAS level of 3.9 ppt is low — the Greene County northeast Tennessee rural agricultural corridor has limited major AFFF military PFAS sources adjacent to the Nolichucky watershed, and the Unaka Mountain headwaters are relatively pristine.