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Radon zones in Nevada

The EPA assigns every county in Nevada to one of three radon potential zones. 9 are in Zone 1, the highest category, home to about 6% of the state's residents.

17
Counties
9
Zone 1 counties
Predicted average above 4 pCi/L
7
Zone 2 counties
Predicted average 2-4 pCi/L
1
Zone 3 counties
Predicted average below 2 pCi/L

The map

Radon potential across Nevada

Every county in Nevada, filled by the zone the EPA assigns it. Zones follow geology rather than county lines, so the colour usually changes where the bedrock does, not where the border is.

Zone 1 · 9Zone 2 · 7Zone 3 · 1

Hover a county · click to open it

County by county

All 17 Nevada counties

Zone 1 · > 4 pCi/LZone 2 · 2 - 4 pCi/LZone 3 · < 2 pCi/L
CountyZonePopulationCOPDSmokingLung ca. deaths
Carson City158k7.8%14.4%36.6
Douglas County150k8.2%12.0%21.9
Eureka County11,91712.1%21.8% -
Lander County15,7699.0%17.8% -
Lincoln County14,4528.3%15.0% -
Lyon County163k8.5%15.9%34.3
Mineral County14,52812.9%21.4%43.0
Pershing County16,3648.0%17.0% -
White Pine County18,5229.1%17.5%24.9
Churchill County226k8.2%16.1%32.7
Elko County254k7.3%17.1%22.9
Esmeralda County273612.5%18.2% -
Humboldt County217k7.6%15.6%17.3
Nye County256k11.0%17.7%40.7
Storey County24,1778.1%12.1% -
Washoe County2498k6.7%12.6%25.9
Clark County32.3M6.9%14.8%30.9

Zones from the EPA Map of Radon Zones. COPD and smoking are CDC PLACES model-based estimates of adult prevalence. Lung cancer death rates are age-adjusted deaths per 100,000 per year, 2019-2023, from NCI State Cancer Profiles. A dash means the source does not report a value for that county.

Highest potential

Zone 1 counties in Nevada

These 9 counties have a predicted average indoor radon screening level above the EPA action level. The EPA recommends every home in them be tested.

Other states

Radon zones elsewhere