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Radon Levels in Storey County, Nevada

EPA puts Storey County in Zone 2, its middle radon zone, and 17.6% of its 34 reported radon tests (2008 to 2017, laboratory totals) were at or above 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

    17.6%

    5.2 pts below NV

    Storey
    17.6%
    Nevada
    22.8%

    34 tests, 2008 to 2017

  • Median result

    2.3pCi/L

    Below action level

    Storey
    2.3 pCi/L
    EPA
    4.0 pCi/L

    Midpoint of the tests, 2008 to 2017

  • Tests reported

    34

    11th of 11 by tests

    Storey
    34
    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

    8 of 11

    Middle half

    Storey
    17.6%
    Carson City
    40.6%

    By share, of 11 with 30+ tests

Read a result for Storey County

Starts at Storey County's median, 2.3 pCi/L

2.3pCi/L

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

EPA’s reading of 2.3 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. Storey County's median reported result, 2008 to 2017.

Interpret this readingWhat a fix costs

The data

Storey County, At a glance

Storey County at a glance

Predicted: EPA radon zone

EPA Zone 2: moderate predicted potential

Storey 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 100% of the county's area

Predicted: EPA Map of Radon Zones

Measured: tests reported to CDC

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

Reported results by concentration band, Storey County, 2008 to 2017, laboratory
Under 2 pCi/L: 47%2 to 4 pCi/L: 35%4 pCi/L and above: 18%

Of 34 pre-mitigation tests reported to CDC, not homes in this area.

Reported results by concentration band, Storey County, 2008 to 2017, laboratory: data table
Result bandTests MeasuredShare Measured
Under 2 pCi/L1647.1%
2 to 4 pCi/L1235.3%
4 pCi/L and above617.6%
What these figures count

These are the 34 tests reported to CDC for Storey 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

Storey County, Compared

Storey County radon figures, compared

Calculated by Radon411

Storey County's 34 reported tests over the 2008 to 2017 laboratory totals had a middle value of 2.3 pCi/L and a maximum of 11.0 pCi/L, and 17.6% reached 4 pCi/L. Nevada as a whole (16 Nevada counties, pooled) comes to 22.8%: 5.2 points higher than here.

Among its state's counties it ranks 8th of 11 Nevada counties with 30 or more tests for the same period. Statewide for the same period, Carson City reported the highest share (40.6%) and Clark County the lowest (8.1%).

Below the action level, 16 tests (47.1%) came in under 2 pCi/L, against 52.5% statewide, and 12 tests (35.3%) fell between 2 and 4, against 24.8% statewide. CDC's ten-year totals for Storey County went from 27 tests (2005 to 2014) to 34 (2008 to 2017), the share going from 3.7% to 17.6%.

EPA's 1993 zone map puts Storey County in Zone 2, a predicted county average between 2 and 4 pCi/L. USGS geology rates 100% of the county's land moderate radon potential.

Next door, the shares run from 22.2% in Washoe County to 40.6% in Carson City.

Storey County against Nevada, the United States and nearby counties, 2008 to 2017, laboratory
AreaTestsAt or above 4 pCi/LMedianDifference from Storey County
Storey County3417.6%2.3 pCi/LThis county
Nevada, pooled16 counties, pooled10,93022.8%Not pooled+5.2 points
United States, pooled2,661 counties, pooled2,013,54435.7%Not pooled+18.1 points
Elko Countyhighest in the state15940.3%3.1 pCi/L+22.7 points
Clark Countylowest in the state2,5988.1%0.9 pCi/L−9.5 points
Carson City, NVborders it73140.6%3.3 pCi/L+23.0 points
Lyon County, NVborders it30330.4%2.6 pCi/L+12.8 points
Washoe County, NVborders it5,04622.2%1.9 pCi/L+4.6 points
Where Storey County's reported results fell, 2008 to 2017, laboratory, beside Nevada and the United States
ResultStorey County testsStorey County shareNevada shareU.S. shareAgainst Nevada
Under 2 pCi/L1647.1%52.5%39.6%−5.4 points
2 to 4 pCi/L1235.3%24.8%24.7%+10.5 points
4 pCi/L and above617.6%22.8%35.7%−5.2 points
Storey 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
Storey County ten-year laboratory totals, against Nevada's pooled share
PeriodTestsAt or above 4 pCi/LMedianHighestNevada, pooledChange from the row before
2008 to 20173417.6%2.3 pCi/L11.0 pCi/L22.8%−1.2 points
2007 to 20163218.8%2.1 pCi/L11.0 pCi/L22.9%+15.0 points
2006 to 2015263.8%1.3 pCi/L4.9 pCi/L23.7%+0.1 points
2005 to 2014273.7%1.4 pCi/L4.9 pCi/L23.3%First on file

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

Storey County, State data

Nevada's own radon test data

Measured

What Nevada's own agencies publish about radon tests in Storey 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 Storey County

The Nevada Radon Education Program publishes its figures by ZIP code, not by county. These are the 5 ZIP codes that lie wholly or partly in Storey County, each with the state's own figures for it. Period: 1989-2015.

ZIP codes in Storey County
ZIP codeWhat the state reports
89403average 2.4 pCi/L
89434average 1.5 pCi/L
89440average 3.0 pCi/L
89442average 2.7 pCi/L
89521average 2.0 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.

Storey County, Geology

The ground under Storey County

Predicted

USGS's geologic map puts all of Storey County's mapped land in one class: moderate radon potential. All of it lies in the area the map calls Great Basin, to which USGS gives a radon index of 11, in the moderate band (9 to 11).

USGS's geologic areas under Storey County
AreaThe rock, in USGS's wordsPotentialRadon indexShare of land
Great BasinSandstone, shale, limestone, mafic volcanic rocks.Moderate1199.6%

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

Storey County beside the ground around it

Across Nevada 17.3% of the land is rated high; none of Storey County's is. Of the 3 counties that border it, 1 has more high-potential ground, Lyon County the most at 13.5%.

Share of land by USGS radon potential: Storey County, the 3 counties bordering it and Nevada
AreaEPA zoneLow potentialModerate potentialHigh potential
Storey CountyZone 2None100%None
Carson CityZone 1None100%None
Lyon CountyZone 1None86.5%13.5%
Washoe CountyZone 242.1%57.9%None
Nevada17 counties, pooled by land areaVaries7.9%74.8%17.3%

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

Local help

Storey County, Local resources

Radon testing and mitigation in Storey County

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

What it means

Storey County, Questions

Questions about radon in Storey County

Are radon levels high in Storey County?

Over the 2008 to 2017 laboratory totals, 17.6% of the radon tests reported to CDC for Storey County, Nevada were at or above 4 pCi/L, and the median reported pre-mitigation result was 2.3 pCi/L. Of 11 Nevada counties with 30 or more tests for the same period, 7 reported a higher share; pooled, the state comes to 22.8%.

Which counties border Storey County?

Storey County borders 3 counties: Carson City, Lyon County and Washoe County.

Products

Storey County, Products

Testing a home in Storey County

In Storey County, 17.6% of 34 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 Storey County; a long-term test tells the year-round average.

Test kits and monitors3

See every kit and monitor

Best radon monitors for Storey County homes, compared

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Storey County, Bordering counties

Counties bordering Storey County

Calculated by Radon411

Storey County, Residents

Who lives in Storey County

The Census Bureau estimates 4,260 residents in Storey County for July 1, 2025, 152 more than in 2020 (+3.7%). That works out to 16 people per square mile of land. Testing is reported here more often than across the state: CDC's 34 reported tests for 2008 to 2017 come to 8.0 for every 1,000 residents (2025 estimate), against 3.3 for Nevada.

Census lists no incorporated place in Storey County: every home in it reads the county's figures.

Residents: U.S. Census Bureau population estimates for July 1, 2025 (Vintage 2025).

Storey County, Homes

Homes in Storey County

Storey County is a place of houses on their own lots: 78% of its 2,112 homes are detached single-family houses, against 60% across Nevada. The homes are older than Nevada's as a whole: half were built before 1987 (1996 for Nevada), and 18% date from before 1960. Owners live in 97% of the occupied homes (Nevada: 59%), so for most households a test and a fix are their own to order.

Homes in Storey County, Nevada, 2019 to 2023
HomesStorey CountyNevada
Housing units2,1121,307,338
Detached houses78%60%
In buildings of 5 or more0%22%
Mobile homes16%6%
Built before 196018%5%
Built since 200024%40%
Middle year built19871996
Owner-occupied97%59%

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