Tap water · TN
Nashville Metro Water Services
EPA system ID TN0000494 · serves about 778,153 people. Every US utility must publish an annual water quality report — here’s the official one (2025), and below it, our plain-English translation.
Read the official report →What Nashville Metro Water Services found in 2025
10 detected analytes from the utility’s own annual report, hand-normalized — nothing was near or over a federal health-based limit.
| Detected | Level | Limit | % of limit | Status |
|---|---|---|---|---|
| Total Trihalomethanes (THM) | 43.5 ppb | 80 ppb | 54% | Within limit |
| Total Haloacetic Acids (HAA) | 27.8 ppb | 60 ppb | 46% | Within limit |
| Chlorine | 1.6 ppm | 4 ppm | 40% | Within limit |
| Fluoride | 0.67 ppm | 4 ppm | 17% | Within limit |
| Copper (2025 analyses) | 0.13 ppm | 1.3 ppm | 10% | Within limit |
| Lead (2025 analyses) | 0.8 ppb | 15 ppb | 5% | Within limit |
| Nitrate | 0.362 ppm | 10 ppm | 4% | Within limit |
| Total Hardness | 100.5 mg/L | — | — | No federal limit |
| Calcium Hardness | 79.5 mg/L | — | — | No federal limit |
| Sodium | 12.2 ppm | — | — | No federal limit |
Levels and limits are as printed in the utility’s report (“limit” is the EPA MCL, action level, residual limit, or secondary guideline that applies to that row; “ND” = not detected). Utilities publish these reports annually — we re-check every covered utility each July, after the federal publication deadline. Detected doesn’t mean dangerous — most detections sit far below their limits. This is education, not medical advice.
Your tap, if it were a bottle
How Nashville Metro Water Services water stacks up against the bottled aisle
Same minerals, same units — the tap values below come from the utility’s report, placed next to the closest match in our bottled-water database.
| Mineral | Your tap | Closest bottled match |
|---|---|---|
| Calcium | 79.5 mg/L | Evian at 80 mg/L |
| Sodium | 12.2 mg/L | Volvic at 11.6 mg/L |
Tap values are the headline levels from the utility’s annual report (often a highest or average figure); bottled values are label- or report-derived. A closest match is a numeric comparison, not an equivalence or an endorsement.
Zip codes covered
37013 · 37076 · 37138 · 37189 · 37201 · 37203 · 37204 · 37205 · 37206 · 37207 · 37208 · 37209 · 37210 · 37211 · 37212 · 37213 · 37214 · 37215 · 37217 · 37218 · 37219 · 37220 · 37228
Boundary zips partially served by other systems are deliberately unlisted — check your exact zip.