Is radon high in Nevada?

Nevada's population-weighted predicted basement average is 1.9 pCi/L, close to the US average of 1.8. 0 of its 17 modeled counties are predicted at or above the EPA action level of 4 pCi/L, 15 are in the 2-4 "consider fixing" range and 2 are below 2. 0% of Nevada ZIP codes are predicted at 4 or higher.

Which Nevada county has the highest radon?

White Pine County has the highest predicted basement average in Nevada at 3.0 pCi/L (EPA Zone 1). The lowest is Clark County at 1.8 pCi/L. These are modeled area averages; individual homes in any county can test far higher.

How many EPA Zone 1 counties are in Nevada?

9 of Nevada's 17 counties (53%) are EPA Zone 1 (highest potential), 7 are Zone 2 and 1 are Zone 3. The EPA zone map dates from 1993; the predicted values on this page come from a 2001-2021 model built on millions of actual tests, so the two can disagree for a given county.

Should I test for radon in Nevada?

Yes. Even though Nevada's predicted average is below 2 pCi/L, the EPA recommends every home be tested - radon varies house to house, and 51.4% of Nevada ZIP codes are still predicted at 2 pCi/L or higher.

Radon levels in Nevada: Low

The model predicts a population-weighted basement average of 1.9 pCi/L across Nevada's 17 counties - close to the US average of 1.8 pCi/L. Above-ground floors average 1.1 pCi/L.

Predicted (model estimate). The pCi/L figures on this page are long-term area averages from a peer-reviewed national model built on millions of real radon tests (2001-2021). They describe the typical home in this area - not your home, which can be several times higher or lower. The EPA radon zone is a separate, 1993 county-level classification. How the numbers work.

9 / 17

EPA Zone 1 counties (53%)

7 / 1

Zone 2 / Zone 3 counties

counties predicted ≥ 4 pCi/L

of ZIP codes predicted ≥ 4 pCi/L

Nevada counties by predicted radon

Sorted highest to lowest predicted basement average. 17 counties.

County	Predicted basement	Upstairs	Grade	EPA zone	ZIPs
White Pine County	3.0 pCi/L	2.0	Moderate	EPA Zone 1	3
Pershing County	3.0 pCi/L	2.5	Moderate	EPA Zone 1	2
Mineral County	2.9 pCi/L	2.0	Moderate	EPA Zone 1	2
Elko County	2.8 pCi/L	2.0	Moderate	EPA Zone 2	8
Lander County	2.7 pCi/L	1.7	Moderate	EPA Zone 1	2
Douglas County	2.7 pCi/L	2.3	Moderate	EPA Zone 1	7
Eureka County	2.7 pCi/L	1.7	Moderate	EPA Zone 1	3
Humboldt County	2.6 pCi/L	1.8	Moderate	EPA Zone 2	5
Esmeralda County	2.6 pCi/L	1.6	Moderate	EPA Zone 2	2
Lincoln County	2.5 pCi/L	1.6	Moderate	EPA Zone 1	4
Carson City	2.4 pCi/L	2.1	Moderate	EPA Zone 1	3
Lyon County	2.4 pCi/L	1.7	Moderate	EPA Zone 1	5
Churchill County	2.3 pCi/L	1.6	Moderate	EPA Zone 2	2
Washoe County	2.2 pCi/L	1.5	Moderate	EPA Zone 2	23
Nye County	2.0 pCi/L	1.2	Moderate	EPA Zone 2	8
Storey County	1.9 pCi/L	1.1	Low	EPA Zone 2	2
Clark County	1.8 pCi/L	1.0	Low	EPA Zone 3	67

Nevada radon questions

Is radon high in Nevada?: Nevada's population-weighted predicted basement average is 1.9 pCi/L, close to the US average of 1.8. 0 of its 17 modeled counties are predicted at or above the EPA action level of 4 pCi/L, 15 are in the 2-4 "consider fixing" range and 2 are below 2. 0% of Nevada ZIP codes are predicted at 4 or higher.
Which Nevada county has the highest radon?: White Pine County has the highest predicted basement average in Nevada at 3.0 pCi/L (EPA Zone 1). The lowest is Clark County at 1.8 pCi/L. These are modeled area averages; individual homes in any county can test far higher.
How many EPA Zone 1 counties are in Nevada?: 9 of Nevada's 17 counties (53%) are EPA Zone 1 (highest potential), 7 are Zone 2 and 1 are Zone 3. The EPA zone map dates from 1993; the predicted values on this page come from a 2001-2021 model built on millions of actual tests, so the two can disagree for a given county.
Should I test for radon in Nevada?: Yes. Even though Nevada's predicted average is below 2 pCi/L, the EPA recommends every home be tested - radon varies house to house, and 51.4% of Nevada ZIP codes are still predicted at 2 pCi/L or higher.

Nevada radon program

Many states offer free or discounted test kits and keep lists of certified mitigators. Find the Nevada radon office through the EPA state radon contacts page. Then read how to test and what mitigation costs.