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Radon Levels in Churchill County, Nevada

EPA puts Churchill County in Zone 2, its middle radon zone, and most reported tests there come back low, though 12.4% of 161 (2008 to 2017, laboratory totals) reached 4 pCi/L. 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

    12.4%

    10.4 pts below NV

    Churchill
    12.4%
    Nevada
    22.8%

    161 tests, 2008 to 2017

  • Median result

    2.1pCi/L

    Below action level

    Churchill
    2.1 pCi/L
    EPA
    4.0 pCi/L

    Midpoint of the tests, 2008 to 2017

  • Tests reported

    161

    6th of 11 by tests

    Churchill
    161
    Washoe
    5,046

    Reported to CDC before any fix, 2008 to 2017

  • EPA radon zone

    Zone 2

    Moderate potential

    1. 1
    2. Zone 2
    3. 3

    1 highest, 3 lowest

    EPA predicts 2 to 4 pCi/L indoors

  • Rank in Nevada

    9 of 11

    Lowest quarter

    Churchill
    12.4%
    Carson City
    40.6%

    By share, of 11 with 30+ tests

Read a result for Churchill County

Starts at Churchill County's median, 2.1 pCi/L

2.1pCi/L

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

EPA’s reading of 2.1 pCi/L

Between 2 and 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 between 2 and 4 pCi/L. EPA recommends considering a fix when the level is between 2 and 4 pCi/L. Churchill County's median reported result, 2008 to 2017.

Interpret this readingWhat a fix costs

The data

Churchill County, At a glance

Churchill County at a glance

Predicted: EPA radon zone

EPA Zone 2: moderate predicted potential

Churchill County is a county: EPA's forecast for it as a whole is an average indoor of 2 to 4 pCi/L (75 to 150 Bq/m³). It describes no single address, and homes above EPA's are found in every zone, this one included.

USGS geologic potential: Moderate across 76% of the county's area

Predicted: EPA Map of Radon Zones

Measured: tests reported to CDC

Radon tests reported for Churchill County, 2008 to 2017, laboratory

Reported results by concentration band, Churchill County, 2008 to 2017, laboratory
Under 2 pCi/L: 44%2 to 4 pCi/L: 44%4 pCi/L and above: 12%

Of 161 pre-mitigation tests reported to CDC, not homes in this area.

Reported results by concentration band, Churchill County, 2008 to 2017, laboratory: data table
Result bandTests MeasuredShare Measured
Under 2 pCi/L7144.1%
2 to 4 pCi/L7043.5%
4 pCi/L and above2012.4%
What these figures count

These are the 161 tests reported to CDC for Churchill County over 2008 to 2017 (laboratory totals), many from homes being sold or already suspected of a problem: they describe the county's reported tests, not this house.

Measured: CDC tracking data. Figure above: 2008 to 2017, laboratory. Measured data period: 2005 to 2017 (every CDC figure on file).

How to read these figures

Churchill County, Compared

Churchill County radon figures, compared

Calculated by Radon411

Churchill County reports fewer high tests than Nevada overall. 12.4% of its 161 tests over the 2008 to 2017 laboratory totals were at or above 4 pCi/L. That is 10.4 points below the 22.8% pooled from 16 Nevada counties.

Ordered from highest share down, it comes 9th of 11 Nevada counties with 30 or more tests for the same period. Nationally, every county with a figure for the same period pools to 35.7%; Churchill County sits 23.3 points below it.

Next door, the shares run from 11.1% in Nye County to 30.4% in Lyon County, with Nye County below Churchill County. Zone 2 on EPA's map (predicted average between 2 and 4 pCi/L) and a 12.4% share point the same way here.

Half the tests came in under 2.1 pCi/L and half over it; the single highest reached 15.0 pCi/L. The rest split 44.1% under 2 pCi/L and 43.5% from 2 to 4 (Nevada: 52.5% and 24.8%).

CDC's ten-year totals for Churchill County went from 147 tests (2005 to 2014) to 161 (2008 to 2017), the share going from 10.2% to 12.4%.

Churchill County against Nevada, the United States and nearby counties, 2008 to 2017, laboratory
AreaTestsAt or above 4 pCi/LMedianDifference from Churchill County
Churchill County16112.4%2.1 pCi/LThis county
Nevada, pooled16 counties, pooled10,93022.8%Not pooled+10.4 points
United States, pooled2,661 counties, pooled2,013,54435.7%Not pooled+23.3 points
Carson Cityhighest in the state73140.6%3.3 pCi/L+28.2 points
Clark Countylowest in the state2,5988.1%0.9 pCi/L−4.3 points
Pershing County, NVborders it2552.0%4.2 pCi/L+39.6 points
Mineral County, NVborders it633.3%3.5 pCi/L+20.9 points
Lyon County, NVborders it30330.4%2.6 pCi/L+18.0 points
Lander County, NVborders it1729.4%2.8 pCi/L+17.0 points
Washoe County, NVborders it5,04622.2%1.9 pCi/L+9.8 points
Nye County, NVborders it8111.1%1.3 pCi/L−1.3 points
Where Churchill County's reported results fell, 2008 to 2017, laboratory, beside Nevada and the United States
ResultChurchill County testsChurchill County shareNevada shareU.S. shareAgainst Nevada
Under 2 pCi/L7144.1%52.5%39.6%−8.4 points
2 to 4 pCi/L7043.5%24.8%24.7%+18.7 points
4 pCi/L and above2012.4%22.8%35.7%−10.4 points
Churchill County ranked among the 11 Nevada counties with 30 or more tests, by share at or above 4 pCi/L, 2008 to 2017, laboratory
CountyRankTestsAt or above 4 pCi/LMedian
Carson City1 of 1173140.6%3.3 pCi/L
Elko County2 of 1115940.3%3.1 pCi/L
White Pine County3 of 116939.1%3.1 pCi/L
Douglas County4 of 111,61737.0%3.1 pCi/L
Humboldt County5 of 116532.3%2.3 pCi/L
Lyon County6 of 1130330.4%2.6 pCi/L
Washoe County7 of 115,04622.2%1.9 pCi/L
Storey County8 of 113417.6%2.3 pCi/L
Churchill County9 of 1116112.4%2.1 pCi/L
Nye County10 of 118111.1%1.3 pCi/L
Clark County11 of 112,5988.1%0.9 pCi/L
Churchill County ten-year laboratory totals, against Nevada's pooled share
PeriodTestsAt or above 4 pCi/LMedianHighestNevada, pooledChange from the row before
2008 to 201716112.4%2.1 pCi/L15.0 pCi/L22.8%+1.4 points
2007 to 201615411.0%2.2 pCi/L14.6 pCi/L22.9%+0.1 points
2006 to 201514710.9%2.1 pCi/L14.6 pCi/L23.7%+0.7 points
2005 to 201414710.2%2.1 pCi/L14.6 pCi/L23.3%First on file

Pooled shares: Radon411's sum of CDC's county counts for one period.

Churchill County, State data

Nevada's own radon test data

Measured

What Nevada's own agencies publish about radon tests in Churchill County, with their period. These are not CDC's figures and are never added to them.

MeasuredState figures, not CDC's

What the Nevada Radon Education Program reports for the ZIP codes in Churchill County

The Nevada Radon Education Program publishes its figures by ZIP code, not by county. These are the 2 ZIP codes that lie wholly or partly in Churchill County, each with the state's own figures for it. Period: 1989-2015.

ZIP codes in Churchill County
ZIP codeWhat the state reports
89406average 2.8 pCi/L
89408average 2.4 pCi/L
  • NBMG says the results are based on independently tested homes, not scientific sampling.
  • The service publishes an average for each ZIP code but no count of tests.
  • Site specific testing is the only way to determine local radon concentrations.
  • A ZIP code that crosses the county line is listed whole; its figures cover all of it.

Measured: Nevada Radon Education Program data, 1989-2015.

Churchill County, Geology

The ground under Churchill County

Predicted

Most of the ground under Churchill County is one class on USGS's geologic map: 75.6% of its land is moderate radon potential, with 24.4% high. The map puts 75.6% of Churchill County in the area it calls Great Basin and 24.2% in Great Basin. USGS gives the first a radon index of 11, in the moderate band (9 to 11), and the second 12, in the high band (12 to 17).

USGS's geologic areas under Churchill County
AreaThe rock, in USGS's wordsPotentialRadon indexShare of land
Great BasinSandstone, shale, limestone, mafic volcanic rocks.Moderate1175.6%
Great BasinAlluvium containing abundant organic-rich clays.High1224.2%

Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.

Churchill County beside the ground around it

On high-potential ground Churchill County is close to Nevada as a whole: 24.4% of its land against 17.3%. Of the 6 counties that border it, 1 has more high-potential ground, Lander County the most at 34.0%.

Share of land by USGS radon potential: Churchill County, the 6 counties bordering it and Nevada
AreaEPA zoneLow potentialModerate potentialHigh potential
Churchill CountyZone 2None75.6%24.4%
Pershing CountyZone 1None89.5%10.5%
Lyon CountyZone 1None86.5%13.5%
Mineral CountyZone 1None86.4%13.6%
Lander CountyZone 1None66.0%34.0%
Washoe CountyZone 242.1%57.9%None
Nye CountyZone 20.6%83.0%16.4%
Nevada17 counties, pooled by land areaVaries7.9%74.8%17.3%

The map rates the ground, not the air in any home.

Local help

Churchill County, Local resources

Radon testing and mitigation in Churchill County

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

What it means

Churchill County, Questions

Questions about radon in Churchill County

Are radon levels high in Churchill County?

Over the 2008 to 2017 laboratory totals, 12.4% of the radon tests reported to CDC for Churchill County, Nevada were at or above 4 pCi/L, and the median reported pre-mitigation result was 2.1 pCi/L. Of 11 Nevada counties with 30 or more tests for the same period, 8 reported a higher share; pooled, the state comes to 22.8%.

Which counties border Churchill County?

Churchill County borders 6 counties: Pershing County, Lyon County, Mineral County, Lander County, Washoe County and Nye County.

Products

Churchill County, Products

Testing a home in Churchill County

In Churchill County, 12.4% of 161 tests reported to CDC over the 2008 to 2017 laboratory totals reached 4 pCi/L, against 22.8% pooled across Nevada. In Zone 2 a short-term kit (2 to 90 days) is the quick first check in Churchill County; a long-term test tells the year-round average.

Test kits and monitors3

See every kit and monitor

Best radon monitors for Churchill County homes, compared

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Churchill County, Bordering counties

Counties bordering Churchill County

Calculated by Radon411

Churchill County, Cities and towns

Cities and towns in Churchill County

The Census Bureau estimates 25,851 residents in Churchill County for July 1, 2025, 281 more than in 2020 (+1.1%). Spread over its land, that is 5.2 people to the square mile. Fallon, its one incorporated place, has 9,570 residents, 37.0% of the total. Testing is reported here more often than across the state: CDC's 161 reported tests for 2008 to 2017 come to 6.2 for every 1,000 residents (2025 estimate), against 3.3 for Nevada.

Fallon is the one incorporated place here; CDC publishes no figure by town, so it reads Churchill County's.

Fallon, Churchill County: residents on July 1, 2025
PlaceResidentsSince 2020Share of residents
Fallon9,570+2.6%37.0%

One incorporated place, as listed in the U.S. Census Bureau’s 2020 place reference files. Residents: U.S. Census Bureau population estimates for July 1, 2025 (Vintage 2025).

Churchill County, Homes

Homes in Churchill County

Of Churchill County's 10,924 homes, 66% are detached houses, against 60% across Nevada; 18% are mobile homes. The homes are older than Nevada's as a whole: half were built before 1987 (1996 for Nevada), and 13% date from before 1960. 68% of occupied homes are lived in by their owner (Nevada: 59%); in the rest a tenant can run a test, but a fix is the landlord's to make.

Homes in Churchill County, Nevada, 2019 to 2023
HomesChurchill CountyNevada
Housing units10,9241,307,338
Detached houses66%60%
In buildings of 5 or more4%22%
Mobile homes18%6%
Built before 196013%5%
Built since 200021%40%
Middle year built19871996
Owner-occupied68%59%

Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.