Drinking water quality · 2024
· Verified
What's in Reno, NV tap water
3 contaminants in Reno, NV's water sat at or above a federal limit, led by PFOS at 5.0x the limit.
- !3 contaminants at or above a federal limit — worst is PFOS at 5.0x
- !1 contaminant within 20% of a limit
- !18 of 27 core regulated contaminants reported — 9 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.
- −60 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
- −1 core regulated contaminants never reported (18/27)
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
- PFOS5.0× the federal limit20 ng/L · limit 4 ng/L
Linked to cancer, thyroid disease, and immune effects; the EPA set an enforceable limit of 4 parts per trillion.
higher than 85% of U.S. systems
- Perfluorohexanesulfonic acid1.5× the federal limit15 ng/L · limit 10 ng/L
Regulated by the EPA at 10 parts per trillion and included in the PFAS Hazard Index.
higher than 90% of U.S. systems
- PFOA1.4× the federal limit5.5 ng/L · limit 4 ng/L
Linked to cancer, liver damage, and immune effects; the EPA set an enforceable limit of 4 parts per trillion.
higher than 75% of U.S. systems
- HAA590% of the federal limit54 ug/L · limit 60 ug/L
Long-term exposure above the federal limit is associated with an increased cancer risk.
higher than 95% of U.S. systems
+24 contaminants were measured and came in below the limitShow all
| Contaminant | Measured | Federal limit |
|---|---|---|
| TTHM | 54 ug/L | 80 ug/L |
| Chlorine | 1.51 mg/L | 4 mg/L |
| Copper | 0.312 mg/L | 1.3 mg/L |
| Turbidity | 0.135 NTU | 1 NTU |
| Nitrate | 0.1303 mg/L | 10 mg/L |
| Barium | 0.02182 mg/L | 2 mg/L |
| Arsenic | 0.07555 ug/L | 10 ug/L |
| Uranium | 0.17475 ug/L | 30 ug/L |
| Nitrate Nitrite | 0.05805 mg/L | 10 mg/L |
| Gross Alpha | 0.04137 pCi/L | 15 pCi/L |
| Antimony | 0.01221 ug/L | 6 ug/L |
| Combined Radium | 0.00847 pCi/L | 5 pCi/L |
| Trichloroethylene | 0.00406 ug/L | 5 ug/L |
| Selenium | 0.02489 ug/L | 50 ug/L |
| Tetrachloroethylene | 0.00187 ug/L | 5 ug/L |
| Chromium | 0.02584 ug/L | 100 ug/L |
| Lead | Not detected ug/L | 15 ug/L |
| Lithium | 18.2 ug/L | — |
| Total Coliform | 0 | — |
| Perfluorobutanesulfonic acid | 5.7 ng/L | — |
| Perfluoroheptanoic acid | 3.9 ng/L | — |
| Perfluorohexanoic acid | 12 ng/L | — |
| Perfluoropentanoic acid | 13 ng/L | — |
| PFBA | 6.8 ng/L | — |
What this report doesn't tell you
9 of the 27 contaminants a community water system normally reports do not appear anywhere in Reno, NV's data. Absent is not the same as absent-from-the-water — it means nobody published a number.