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Nevada Radon Map and Levels by County

Nevada's counties span all three EPA radon zones. Homes with elevated levels occur in all three zones, so only a test measures yours.

Data checked By Radon411Methodology

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  • Share at 4+ pCi/L

    22.8%

    12.9 pts below U.S.

    Nevada
    22.8%
    U.S.
    35.7%

    10,930 tests across 16 counties, 2008 to 2017

  • Rank among states

    34 of 47

    Middle of the states

    Nevada
    22.8%
    North Dakota
    59.3%

    By share, every state pooled the same way, 2008 to 2017

  • Counties in EPA Zone 1

    9 of 17

    Most at highest potential

    Zone 1
    9
    Zone 2
    7

    Most counties sit in Zone 1; Zone 1 is the highest potential

  • Highest county

    40.6%

    Carson City

    Carson City
    40.6%
    Clark
    8.1%

    Counties with 30+ tests, 2008 to 2017

Read a result for Nevada

Starts at EPA's action level

4.0pCi/L

EPA’s own thresholds; the figures are the area’s, never this home’s.

EPA’s reading of 4.0 pCi/L

At or above 4 pCi/L

  1. Under 20 to 1.9 pCi/L
  2. 2 to 4consider a fix
  3. 4 and aboveEPA says fix it

This result is at or above 4 pCi/L. EPA recommends fixing a home when the radon level is 4 pCi/L or higher. 22.8% of Nevada's reported tests reached 4 pCi/L, 2008 to 2017.

Interpret this readingWhat a fix costs

The data

Nevada, At a glance

Nevada at a glance

Predicted: EPA radon zone

17 of 17 counties classified

EPA classifies counties, not states. Of the 17 counties in Nevada with a zone, 9 are in Zone 1, 7 in Zone 2 and 1 in Zone 3.

  • Zone 1: Highest predicted potentialgreater than 4 pCi/L9 of 17 counties · 52.9%
  • Zone 2: Moderate predicted potential2 to 4 pCi/L7 of 17 counties · 41.2%
  • Zone 3: Lower predicted potentialless than 2 pCi/L1 of 17 counties · 5.9%

An EPA radon zone predicts a whole county. It is not intended to determine whether any individual home should be tested: homes with elevated levels occur in all three zones, and EPA recommends testing every home regardless of zone.

Predicted: EPA Map of Radon Zones

Measured: tests reported to CDC

CDC test figures, county by county

CDC publishes Nevada's radon test figures by county: 16 of its 17 counties have one. Each one's share is in the county list.

How to read these figures

Nevada, Compared

Nevada radon figures, compared

Calculated by Radon411
Nevada, 2008 to 2017, laboratory
22.8%
of 10,930 tests at or above 4 pCi/L, pooled
Against the U.S.
−12.9points
35.7% pooled
Rank among the states
34 of 47
1 is the highest share
Counties with 30 or more tests
11
Highest
40.6%
Carson City
Lowest
8.1%
Clark County

About 2 in 10 of the 10,930 tests reported for Nevada over the 2008 to 2017 laboratory totals came back at or above 4 pCi/L (22.8%, 16 counties pooled). That is 34th of 47 states with county figures for the period; Arkansas (23.2%) above it and Florida (22.7%) below.

By band, 6 counties at 30% to 50%, 2 counties at 15% to 30%, 3 counties at 5% to 15%. Its 11 counties with 30 or more tests run from 8.1% in Clark County to 40.6% in Carson City; in 0 of them half or more of the reported tests reached 4 pCi/L.

EPA's 1993 map puts 9 of its 17 classified counties in Zone 1; against that, 22.8% of the tests reported since reached 4 pCi/L. The national pool for the same period is 35.7%, so Nevada runs 12.9 points below the country.

Across its 4 overlapping ten-year totals, the share went from 23.3% (2005 to 2014) to 22.8% (2008 to 2017), within 2 points, with 2006 to 2015 the highest at 23.7%.

Nevada ranked among 47 states by pooled share of tests at or above 4 pCi/L, 2008 to 2017, laboratory
StateRankCountiesTestsAt or above 4 pCi/L
New York29 of 476297,14524.5%
Maryland30 of 472447,94123.9%
Massachusetts31 of 4714234,15223.8%
Rhode Island32 of 47537,87423.8%
Arkansas33 of 475866823.2%
Nevada34 of 471610,93022.8%
Florida35 of 476253,79422.7%
North Carolina36 of 479973,13922.6%
Alabama37 of 476512,56921.9%
Vermont38 of 471410,60021.7%
South Carolina39 of 474626,48119.4%
Nevada's highest counties with 30 or more tests, by share at or above 4 pCi/L, 2008 to 2017, laboratory
CountyRankTestsAt or above 4 pCi/L
Carson City1 of 1173140.6%
Elko County2 of 1115940.3%
White Pine County3 of 116939.1%
Douglas County4 of 111,61737.0%
Humboldt County5 of 116532.3%
Lyon County6 of 1130330.4%
Washoe County7 of 115,04622.2%
Storey County8 of 113417.6%
Churchill County9 of 1116112.4%
Nye County10 of 118111.1%
Nevada's counties with 30 or more tests, by their own share at or above 4 pCi/L, 2008 to 2017, laboratory
ShareCountiesTheir testsFor example
50% or more00None
30% to 50%62,944Carson City, Elko County, White Pine County
15% to 30%25,080Washoe County, Storey County
5% to 15%32,840Churchill County, Nye County, Clark County
Under 5%00None
Nevada ten-year laboratory totals, pooled, against the United States
PeriodCountiesTestsAt or above 4 pCi/LUnited StatesChange from the row before
2008 to 20171610,93022.8%35.7%−0.1 points
2007 to 20161610,68422.9%35.8%−0.8 points
2006 to 2015169,56323.7%36.3%+0.5 points
2005 to 2014168,94423.3%36.0%First on file

Pooled shares: Radon411's sum of CDC's county counts for one period. CDC publishes no state or national figure.

Nevada, Counties

Nevada counties by EPA zone

Predicted

Nevada's radon map, then all 17 counties by EPA's zone, the highest reported share of tests at or above 4 pCi/L first; each has its own report.

Nevada radon map by county: EPA radon zones. Map of Nevada's 17 counties shaded by EPA radon zone: Zone 1 in red-orange, Zone 2 in amber, Zone 3 in pale sand. 9 in Zone 1, 7 in Zone 2, 1 in Zone 3.
Nevada radon map by countyEPA radon zones for Nevada's counties: 9 counties in Zone 1, 7 counties in Zone 2, 1 county in Zone 3.A prediction for each county, not a reading of any home; elevated homes occur in all three zones.

The 11 highest in Nevada, 2008 to 2017

Zone 1: highest predicted potential9

Local help

Nevada, Local resources

Local resources in Nevada

Who to ask in Nevada: its radon program, test kits and professionals.

What Nevada's program says
Email
chrisk@unr.edu

What it means

Nevada, Questions

Questions about radon in Nevada

Is radon a problem in Nevada?

EPA's Map of Radon Zones places 9 of the 17 Nevada counties it classifies in Zone 1, the highest predicted potential, 7 in Zone 2 and 1 in Zone 3. Pooled from 16 counties, 22.8% of the 10,930 radon tests reported to CDC over the 2008 to 2017 laboratory totals were at or above 4 pCi/L, 34th of 47 states.

Which Nevada counties are in EPA radon Zone 1?

9 counties are in Zone 1: Carson City, Douglas County, Eureka County, Lander County, Lincoln County, Lyon County, Mineral County, Pershing County, and 1 more in the county table on this page.

Who does radon mitigation in Nevada?

Radon411's Nevada directory lists 20 radon businesses for testing, mitigation or both, each with the licensing list it was read from.

Which Nevada counties have the highest radon?

By the share of reported tests at or above 4 pCi/L, 2008 to 2017, laboratory: Carson City 40.6% (731 tests), Elko County 40.3% (159 tests), White Pine County 39.1% (69 tests), Douglas County 37.0% (1,617 tests), Humboldt County 32.3% (65 tests).

Which EPA region is Nevada in?

Nevada is in EPA Region 9: Pacific Southwest.

Products

Nevada, Products

Testing a home in Nevada

22.8% of the 10,930 tests reported to CDC for Nevada over the 2008 to 2017 laboratory totals reached 4 pCi/L: a short-term kit (2 to 90 days) gives a first answer in days, a long-term test the year-round average. A short-term kit (2 to 90 days) is the quick first check for a home in Nevada; a long-term test tells the year-round average.

Test kits and monitors3

See every kit and monitor

Best radon monitors for Nevada homes, compared

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Cities in Nevada with their own page

Radon data is published by county, not by city. Each city page sets the figures of the counties the city lies in side by side.