Water quality by county
in Nevada
EPA sampled public water systems across Nevada for PFAS under its UCMR 5 programme. Of the 17 counties, 4 have a reading above a federal limit and 5 have not been sampled at all — which is not a clean result, only an absence of one. Each county below shows what was found, at what concentration, and at which utility.
| county | Population | Worst result | Compound |
|---|---|---|---|
| Elko County | 54,363 | 12× | PFOS · 46 ng/L |
| Washoe County | 507,280 | 5.0× | PFOS · 20 ng/L |
| Lyon County | 63,718 | 1.4× | PFOS · 5.6 ng/L |
| Douglas County | 49,564 | 1.0× | PFOS · 4 ng/L |
| Carson County | 58,148 | not sampled | — |
| Churchill County | 26,033 | under the limit | — |
| Clark County | 2,398,871 | under the limit | — |
| Esmeralda County | 720 | not sampled | — |
| Eureka County | 1,877 | not sampled | — |
| Humboldt County | 17,116 | under the limit | — |
| Lander County | 5,785 | under the limit | — |
| Lincoln County | 4,345 | not sampled | — |
| Mineral County | 4,475 | not sampled | — |
| Nye County | 55,990 | under the limit | — |
| Pershing County | 6,536 | under the limit | — |
| Storey County | 4,112 | under the limit | — |
| White Pine County | 8,534 | under the limit | — |