Tullahoma Water Hardness & Quality Report (2026)

Tullahoma Utilities Authority (TUA) provides water to the city of Tullahoma in Coffee County, Tennessee, serving approximately 20,000 residents in the south-central part of the state. The utility sources its supply primarily from local groundwater wells tapping into karst aquifers in the Central Basin. Treatment occurs at the TUA Water Treatment Plant, which includes aeration, sedimentation, filtration, chloramination for disinfection, and fluoride addition. The service area covers Tullahoma and surrounding communities in Coffee County, distributed through an extensive pipeline network.

The watershed recharges via karst topography in the Eastern Highland Rim transitioning to the Cumberland Plateau. Key geological features include Ordovician-age limestones — the Holston Formation and Lebanon Limestone — and underlying shales, forming productive aquifers with high permeability. This Central Basin carbonate geology imparts a moderately mineralised character as calcium and magnesium-bearing rocks dissolve during groundwater flow through solution channels and caves. The karst nature yields variable but consistently mineral-influenced chemistry typical of Tennessee's limestone terrain.

At moderately hard levels, scale buildup becomes noticeable on fixtures, reducing efficiency in water heaters, dishwashers, and washing machines. White deposits appear on heating elements and glass surfaces, increasing energy costs. Regular vinegar descaling, installing drain screens, and flushing hot water tanks annually are recommended; a water softener is advisable for households showing soap scum or spotting. Tullahoma's water meets EPA standards with zero violations, including lead at 0.015 mg/L below action levels. The 2025 Consumer Confidence Report notes no PFAS detections above limits; TTHMs and chloroform are monitored below health guidelines, and chromium-6 is present but does not exceed standards.