Drinking water quality · 2023
· Verified
What's in Las Vegas, NV tap water
1 contaminant in Las Vegas, NV's water sat at or above a federal limit, led by Lead at 1.1x the limit.
- !1 contaminant at or above a federal limit — worst is Lead at 1.1x
- !1 contaminant within 20% of a limit
- !13 of 27 core regulated contaminants reported — 14 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.
- −13 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
- −9 core regulated contaminants never reported (13/27)
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
- Lead1.1× the federal limit16 ug/L · limit 15 ug/L
There is no safe level of lead; it harms brain development in children and raises blood pressure in adults. The EPA sets an action level, not a health goal above zero.
Higher than 95% of NV systems that report it · higher than 95% of U.S. systems
- TTHM96% of the federal limit77 ug/L · limit 80 ug/L
Long-term exposure above the federal limit is linked to liver, kidney, and central-nervous-system effects and increased cancer risk.
higher than 90% of U.S. systems
+14 contaminants were measured and came in below the limitShow all
| Contaminant | Measured | Federal limit |
|---|---|---|
| HAA5 | 42 ug/L | 60 ug/L |
| Bromate | 4.3 ug/L | 10 ug/L |
| Gross Alpha | 3.9 pCi/L | 15 pCi/L |
| Chlorine Free | 1 mg/L | 4 mg/L |
| Arsenic | 1.9 ug/L | 10 ug/L |
| Fluoride | 0.71 mg/L | 4 mg/L |
| Uranium | 4 ug/L | 30 ug/L |
| Turbidity | 0.08 NTU | 1 NTU |
| Nitrate | 0.61 mg/L | 10 mg/L |
| Barium | 0.1 mg/L | 2 mg/L |
| Selenium | 2.4 ug/L | 50 ug/L |
| Copper | 0.85 % | — |
| Total Coliform | 0.3 % | — |
| Radium 226 228 | Not detected pCi/L | 5 pCi/L |
What this report doesn't tell you
14 of the 27 contaminants a community water system normally reports do not appear anywhere in Las Vegas, NV's data. Absent is not the same as absent-from-the-water — it means nobody published a number.