Tennessee Tap Water Quality
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Overview
Memphis drinks from the Memphis Sand aquifer: ancient, naturally filtered artesian water widely called some of the best-tasting municipal supply in America. Nashville, Knoxville, and Chattanooga treat river water to full compliance.
The watchpoints: TVA's Allen plant wells near Memphis raised (contained) concerns about pulling shallow contaminated groundwater toward the drinking aquifer, coal-ash legacy at Kingston (site of the 2008 spill) still shadows the state's utility politics, and Appalachian small systems carry the usual DBP and infrastructure strain.
Common Contaminants in Tennessee
Routine exceedances in small upland surface-water systems
Older Memphis and Nashville housing carries standard legacy-plumbing risk; utilities run corrosion control
Kingston's 2008 spill and ash-pond groundwater seepage remain monitored legacies near TVA sites, separate from compliant public supplies
Violations & Compliance
The four metro systems are consistently compliant, and Memphis' aquifer needs minimal treatment. Small-system DBPs in the mountains generate most violations.
Water Hardness in Tennessee
Moderate, typically 60–150 mg/L. Tennessee and Cumberland River systems (Memphis's soft aquifer water is the exception at the low end) are mostly moderate, with karst-spring systems harder.
Hardness affects taste, limescale, and soap — not safety. Compare levels across all cities or read the water hardness guide.
City Water Reports in Tennessee
Frequently Asked Questions
Sources & References
The safety rating and guidance on this page draw on the following sources. See our full methodology.
- •US EPA Safe Drinking Water Act regulations
- •EWG Tap Water Database
- •The utility's most recent Consumer Confidence Report (CCR)
- •WHO Guidelines for Drinking-water Quality