Drinking water quality · 2024
· Verified
· PWSID TN0000116
What's in Clarksville, TN tap water
1 contaminant in Clarksville, TN's water sat at or above a federal limit, led by Combined Radium at 2.4x the limit.
- !1 contaminant at or above a federal limit — worst is Combined Radium at 2.4x
- !1 contaminant within 20% of a limit
- !11 of 27 core regulated contaminants reported — 16 never appear in this report
- ✓No open federal violations
+How this score is calculated
Every system starts at 100. Points come off for measured levels, for the federal violation record, and for how much of the core regulated set the utility actually reported. All three inputs are the utility's own published numbers and EPA's own records.
- −27 contaminants at or above a federal limit
- −4 contaminants within 20% of a limit
- −0 open health-based violations
- −0 open monitoring / reporting violations
- −0 health-based violations resolved in the last 5 years
- −13 core regulated contaminants never reported (11/27)
A 90–100 · B 80–89 · C 70–79 · D 60–69 · F below 60. A system reporting under a third of the core set is capped at C however clean its numbers look — a short report is not a clean bill of health.
Full grading methodology, constant for constant →What to worry about
- Combined Radium2.4× the federal limit12 pCi/L · limit 5 pCi/L
Long-term exposure above the federal limit increases the risk of bone cancer.
higher than 95% of U.S. systems
- Gross Alpha80% of the federal limit12 pCi/L · limit 15 pCi/L
Long-term exposure above the federal limit increases cancer risk.
higher than 95% of U.S. systems
+15 contaminants were measured and came in below the limitShow all
| Contaminant | Measured | Federal limit |
|---|---|---|
| Radium 226 228 | 3.92 pCi/L | 5 pCi/L |
| Copper | 0.901 mg/L | 1.3 mg/L |
| Chloramine | 2.2 mg/L | 4 mg/L |
| Lead | 7.77 ug/L | 15 ug/L |
| Fluoride | 1.41 mg/L | 4 mg/L |
| Arsenic | 1.96 ug/L | 10 ug/L |
| Benzo(a)pyrene | 20 ng/L | 200 ng/L |
| Selenium | 2.79 ug/L | 50 ug/L |
| Chromium | 4.24 ug/L | 100 ug/L |
| Uranium | 1.06684 ug/L | 30 ug/L |
| Cyanide | 2.8 ug/L | 200 ug/L |
| Barium | 0.023 mg/L | 2 mg/L |
| Manganese | 200 ug/L | — |
| Sodium | 119000 ug/L | — |
| Zinc | 0.00934 mg/L | — |
What this report doesn't tell you
16 of the 27 contaminants a community water system normally reports do not appear anywhere in Clarksville, TN's data. Absent is not the same as absent-from-the-water — it means nobody published a number.
+Full detail: PFAS testing, water source, historical monitoring, and the federal violation record
Where your water comes from · EPA SDWIS
Clarksville, TN's drinking water comes from surface water, drawn from 1 source.
Source
- CUMBERLAND RVR
Treatment
- CUMBERLAND R.
- CUMBERLAND R. PLANT
Distribution
Compliance history
Federal Safe Drinking Water Act violation & enforcement records (EPA SDWIS). A violation is a regulatory determination by the state or EPA — separate from the measured levels above.