PFAS · Nevada
PFAS in Nevada drinking water: EPA’s final survey results
EPA’s national PFAS survey (UCMR 5) tested 37 of the community water systems that serve homes in Nevada. 7 found at least one of 29 PFAS above the laboratory reporting level, and 3 had a PFOA or PFOS sampling-location yearly average at or above EPA’s 4.0 ppt limit. Samples were collected from January 2023 to February 2026.
Data as of EPA UCMR 5 final release, August 2026 (file dated Aug 28, 2026) · EPA SDWIS 2026Q2 (file dated Jul 9, 2026). How we build these pages
PFHxA was the compound Nevada community systems found most often: 5 of 37 tested systems measured it above the reporting level. Across the country, 35% of surveyed community systems found at least one PFAS; in Nevada the share is 19%. The largest Nevada system with a detection, Las Vegas Valley Water District, serves 1,539,277 people and found 2 of the 29 compounds.
Which PFAS were found most often in Nevada
Each row counts the Nevada community water systems where that compound was measured above the reporting level at least once. A detection is a measurement, not a violation: most of these compounds have no federal limit.
| Compound | Systems where found | Systems tested | Share |
|---|---|---|---|
| PFHxA | 5 | 37 | 14% |
| PFPeA | 5 | 37 | 14% |
| PFBS | 4 | 37 | 11% |
| PFOS | 4 | 37 | 11% |
| PFHxS | 3 | 37 | 8% |
| PFOA | 2 | 37 | 5% |
| PFBA | 1 | 37 | 3% |
| PFHpA | 1 | 37 | 3% |
| PFPeS | 1 | 37 | 3% |
Nevada systems with the most PFAS found
The 7 surveyed community water systems that found the most different PFAS, with PFOA and PFOS compared to EPA’s 4.0 ppt limits on the yearly average at the highest sampling location. Larger systems come first when counts tie.
| Water system | People served | PFAS found (of 29) | PFOA | PFOS |
|---|---|---|---|---|
| Truckee Meadows Water Authority NV0000190 | 442,000 | 8 | 5.2 ppt at or above the MCL | 13.0 ppt at or above the MCL |
| Elko City of NV0000272 | 23,000 | 7 | 5.8 ppt at or above the MCL | 29.0 ppt at or above the MCL |
| Great Basin Water Co Cold Springs NV0000207 | 9,910 | 3 | — not detected above the reporting level | — not detected above the reporting level |
| Gardnerville Water Company NV0000065 | 5,800 | 3 | — not detected above the reporting level | 2.0 ppt below the MCL |
| Las Vegas Valley Water District NV0000090 | 1,539,277 | 2 | — not detected above the reporting level | — not detected above the reporting level |
| Indian Hills Gid NV0000355 | 5,962 | 2 | — not detected above the reporting level | — not detected above the reporting level |
| Fernley Public Works NV0000062 | 23,064 | 1 | — not detected above the reporting level | 5.0 ppt at or above the MCL |
Counties with the most systems that found PFAS
- Washoe County 2 of 4 surveyed systems
- Douglas County 2 of 6 surveyed systems
- Clark County 1 of 10 surveyed systems
- Lyon County 1 of 3 surveyed systems
- Elko County 1 of 4 surveyed systems