Radon zones in Nevada
Last updated
EPA’s Map of Radon Zones places 17 Nevada counties in its three radon potential zones: 9 in Zone 1 (highest), 7 in Zone 2 (moderate), and 1 in Zone 3 (low).
What this means for Nevada homes
Most Nevada counties fall in Zone 1. EPA predicts average indoor screening levels above 4 pCi/L across much of Nevada, so elevated radon is common. Testing is especially worthwhile here, and radon-resistant construction features make sense for new homes.
EPA’s guidance is the same everywhere: test your home, fix it if the level is 4 pCi/L or higher, and consider fixing between 2 and 4 pCi/L. The zone map is from 1993 and should not be used to decide whether a single home needs testing.
Nevada radon program
EPA lists the following state contact for Nevada: University of Nevada, Reno Extension Nevada Radon Education Program, phone 775-784-4848. Website: extension.unr.edu/radon. State programs can tell you about local testing data, free or discounted test kits, disclosure rules for home sales, and credentialed radon professionals.
Nevada counties and their EPA radon zones
| County | EPA radon zone |
|---|---|
| Carson City | Zone 1 |
| Churchill County | Zone 2 |
| Clark County | Zone 3 |
| Douglas County | Zone 1 |
| Elko County | Zone 2 |
| Esmeralda County | Zone 2 |
| Eureka County | Zone 1 |
| Humboldt County | Zone 2 |
| Lander County | Zone 1 |
| Lincoln County | Zone 1 |
| Lyon County | Zone 1 |
| Mineral County | Zone 1 |
| Nye County | Zone 2 |
| Pershing County | Zone 1 |
| Storey County | Zone 2 |
| Washoe County | Zone 2 |
| White Pine County | Zone 1 |
County names follow the 2020 Census. Zones from the EPA Map of Radon Zones (text version). Rows marked “zone of” use the zone EPA gave the predecessor or surrounding county.
Next steps: read how to test your home, check a result with the level calculator, or look up a single address by ZIP code.