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Radon Levels in Cheyenne County, Nebraska

EPA puts Cheyenne County in Zone 2, its middle radon zone, and 36.4% of its 55 reported radon tests (2023) 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

How to test this homeFind a certified tester

  • Share at 4+ pCi/L

    36.4%

    1.8 pts below NE

    Cheyenne
    36.4%
    Nebraska
    38.2%

    55 tests, 2023

  • Median result

    3.6pCi/L

    Below action level

    Cheyenne
    3.6 pCi/L
    EPA
    4.0 pCi/L

    Midpoint of the tests, 2023

  • Tests reported

    55

    22nd of 33 by tests

    Cheyenne
    55
    Lancaster
    4,058

    Reported to CDC before any fix, 2023

  • 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 Nebraska

    25 of 33

    Middle half

    Cheyenne
    36.4%
    Gage
    79.8%

    By share, of 33 with 30+ tests

Read a result for Cheyenne County

Starts at Cheyenne County's median, 3.6 pCi/L

3.6pCi/L

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

EPA’s reading of 3.6 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. Cheyenne County's median reported result, 2023.

Interpret this readingWhat a fix costs

The data

Cheyenne County, At a glance

Cheyenne County at a glance

Predicted: EPA radon zone

EPA Zone 2: moderate predicted potential

Cheyenne 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 Cheyenne County, 2023

Share of reported tests at or above 4 pCi/L, by year, Cheyenne County
Share of reported tests at or above 4 pCi/L, by year, Cheyenne County
YearShare of reported tests at or above 4 pCi/L
201440.9%
201543.7%
201631.0%
201744.1%
201833.6%
201933.1%
202037.6%
202141.2%
202229.2%
202336.4%

2023: 36.4%. Across these years the share ran from 29.2% to 44.1%. Each column counts radon tests reported to CDC that year, not homes.

What these figures count

These are the 55 tests reported to CDC for Cheyenne County over 2023, 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: 2023. Measured data period: 2005 to 2023 (every CDC figure on file).

How to read these figures

Cheyenne County, Compared

Cheyenne County radon figures, compared

Calculated by Radon411

In Cheyenne County, about 4 in 10 reported tests in 2023 (20 of 55) were at or above EPA's action level. Against the national pool of 33.4%, the gap is 3.0 points higher. Across 86 Nebraska counties pooled together, 38.2% of tests reached that level, so Cheyenne County runs 1.8 points below its state.

By share, Cheyenne County is 25th of 33 Nebraska counties with 30 or more tests for the same period.

Year by year, 2014 opened at 40.9% and 2023 closed at 36.4% (down 4.5 points), with 2017 the high at 44.1%. Half the tests came in under 3.6 pCi/L and half over it; the single highest reached 58.5 pCi/L. Below the action level, 5 tests (9.1%) came in under 2 pCi/L, against 39.2% statewide, and 30 tests (54.5%) fell between 2 and 4, against 22.6% statewide.

Zone 2 on EPA's map (predicted average between 2 and 4 pCi/L) and a 36.4% share point the same way here. USGS geology rates 100% of the county's land moderate radon potential. CDC also counts 13 tests taken after mitigation in Cheyenne County for the same period: tests in homes where a fix was already in.

The busiest year on file was 2015, with 426 tests reported; the quietest, 2023, had 55.

Share of reported tests at or above 4 pCi/L by year, Cheyenne County against Nebraska2014 to 2023, years with 30 or more tests: Cheyenne County 40.9% to 36.4%, the state's pooled share 38.2% in 2023.
Cheyenne CountyNebraska, pooled
Share of reported tests at or above 4 pCi/L by year, Cheyenne County against Nebraska: data table
YearTestsCheyenne County, at or above 4 pCi/LNebraska, pooled
201441140.9%50.5%
201542643.7%53.3%
201626131.0%47.4%
201733344.1%47.7%
201833033.6%44.5%
201939933.1%44.3%
202025537.6%42.2%
202115341.2%34.9%
20227229.2%34.0%
20235536.4%38.2%
Cheyenne County against Nebraska, the United States and nearby counties, 2023
AreaTestsAt or above 4 pCi/LMedianDifference from Cheyenne County
Cheyenne County5536.4%3.6 pCi/LThis county
Nebraska, pooled86 counties, pooled11,16338.2%Not pooled+1.8 points
United States, pooled642 counties, pooled128,74033.4%Not pooled−3.0 points
Gage Countyhighest in the state8479.8%9.4 pCi/L+43.4 points
Dakota Countylowest in the state1303.1%0.4 pCi/L−33.3 points
Sedgwick County, COborders it1100.0%11.7 pCi/L+63.6 points
Garden County, NEborders it666.7%4.5 pCi/L+30.3 points
Morrill County, NEborders it757.1%4.7 pCi/L+20.7 points
Deuel County, NEborders it1050.0%4.1 pCi/L+13.6 points
Kimball County, NEborders it2040.0%3.4 pCi/L+3.6 points
Logan County, COborders it2123.8%2.3 pCi/L−12.6 points
Where Cheyenne County's reported results fell, 2023, beside Nebraska and the United States
ResultCheyenne County testsCheyenne County shareNebraska shareU.S. shareAgainst Nebraska
Under 2 pCi/L59.1%39.2%41.4%−30.1 points
2 to 4 pCi/L3054.5%22.6%25.2%+31.9 points
4 pCi/L and above2036.4%38.2%33.4%−1.8 points
Cheyenne County ranked among the 33 Nebraska counties with 30 or more tests, by share at or above 4 pCi/L, 2023
CountyRankTestsAt or above 4 pCi/LMedian
Nemaha County20 of 333259.4%5.7 pCi/L
Pierce County21 of 335556.4%5.0 pCi/L
Buffalo County22 of 3317355.5%4.2 pCi/L
Sarpy County23 of 3375551.9%4.1 pCi/L
Douglas County24 of 332,75438.7%2.9 pCi/L
Cheyenne County25 of 335536.4%3.6 pCi/L
Box Butte County26 of 335435.2%3.3 pCi/L
Scotts Bluff County27 of 3327327.5%1.8 pCi/L
Lancaster County28 of 334,05826.7%1.6 pCi/L
Platte County29 of 3321226.4%1.6 pCi/L
Dawson County30 of 339718.6%2.0 pCi/L
Cheyenne County radon tests by year, against Nebraska's pooled share
YearTestsAt or above 4 pCi/LMedianHighestNebraska, pooledChange from the row before
20235536.4%3.6 pCi/L58.5 pCi/L38.2%+7.2 points
20227229.2%2.0 pCi/L23.7 pCi/L34.0%−12.0 points
202115341.2%3.5 pCi/L16.5 pCi/L34.9%+3.6 points
202025537.6%3.0 pCi/L17.9 pCi/L42.2%+4.5 points
201939933.1%2.8 pCi/L22.7 pCi/L44.3%−0.5 points
201833033.6%3.1 pCi/L12.3 pCi/L44.5%−10.5 points
201733344.1%3.7 pCi/L29.2 pCi/L47.7%+13.1 points
201626131.0%3.0 pCi/L20.8 pCi/L47.4%−12.7 points
201542643.7%3.5 pCi/L21.2 pCi/L53.3%+2.8 points
201441140.9%3.5 pCi/L19.3 pCi/L50.5%First on file

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

Cheyenne County, Geology

The ground under Cheyenne County

Predicted

USGS's geologic map puts all of Cheyenne County's mapped land in one class: moderate radon potential. The map puts 64.3% of Cheyenne County in the area it calls Tertiary Rocks and 35.7% in White River Formation. USGS gives both a radon index of 11, in the moderate band (9 to 11).

USGS's geologic areas under Cheyenne County
AreaThe rock, in USGS's wordsPotentialRadon indexShare of land
Tertiary RocksTertiary sandstone, siltstone, and volcanic ash.Moderate1164.3%
White River FormationSiltstone, sandstone, conglomerate, volcanic tuff.Moderate1135.7%

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

Cheyenne County beside the ground around it

Across Nebraska 40.9% of the land is rated high; none of Cheyenne County's is. Of the 7 counties that border it, 3 have more high-potential ground, Sedgwick County, CO the most at 78.5%.

Share of land by USGS radon potential: Cheyenne County, the 7 counties bordering it and Nebraska
AreaEPA zoneLow potentialModerate potentialHigh potential
Cheyenne CountyZone 2None100%None
Logan County, COZone 1None40.7%59.3%
Deuel CountyZone 2None98.0%2.0%
Sedgwick County, COZone 1None21.5%78.5%
Kimball CountyZone 2None100%None
Morrill CountyZone 240.7%59.3%None
Banner CountyZone 2None100%None
Garden CountyZone 375.0%25.0%None
Nebraska93 counties, pooled by land areaVaries28.2%30.9%40.9%

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

Local help

Cheyenne County, Local resources

Radon testing and mitigation in Cheyenne County

What Nebraska's program says
Phone
(402) 471-1005
Licensing of radon professionals
If radon testing is done in schools, offices, or other places of work, it must be done by a licensed radon measurement business.

What it means

Cheyenne County, Questions

Questions about radon in Cheyenne County

Are radon levels high in Cheyenne County?

In 2023, 36.4% of the radon tests reported to CDC for Cheyenne County, Nebraska were at or above 4 pCi/L, and the median reported pre-mitigation result was 3.6 pCi/L. Of 33 Nebraska counties with 30 or more tests for the same period, 24 reported a higher share; pooled, the state comes to 38.2%.

Which counties border Cheyenne County?

Cheyenne County borders 7 counties: Logan County, CO, Deuel County, NE, Sedgwick County, CO, Kimball County, NE, Morrill County, NE, Banner County, NE and Garden County, NE.

Products

Cheyenne County, Products

Testing a home in Cheyenne County

In Cheyenne County, 36.4% of 55 tests reported to CDC in 2023 reached 4 pCi/L, against 38.2% pooled across Nebraska. In Zone 2 a short-term kit (2 to 90 days) is the quick first check in Cheyenne County; a long-term test tells the year-round average.

Test kits and monitors3

See every kit and monitor

Best radon monitors for Cheyenne County homes, compared

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Cheyenne County, Bordering counties

Counties bordering Cheyenne County

Calculated by Radon411

Cheyenne County, Cities and towns

Cities and towns in Cheyenne County

Cheyenne County's population has barely moved since 2020: 9,528 residents on July 1, 2025 against 9,488 then, by the Census Bureau's estimates. Spread over its land, that is 8.0 people to the square mile. Sidney alone is home to 6,432 of them, 67.5% of the total. Together its 5 incorporated places hold 79.4% of those residents; the other 20.6% live outside any of them. CDC's 55 reported tests for 2023 work out to 5.8 per 1,000 residents (2025 estimate), close to Nebraska's 5.5.

From Sidney to Gurley, CDC publishes no figure by town: each reads Cheyenne County's.

The cities and towns in Cheyenne County by residents, July 1, 2025
PlaceResidentsSince 2020Share of residents
Sidney6,432+0.3%67.5%
Potter343+0.3%3.6%
Lodgepole315+1.3%3.3%
Dalton285+1.1%3.0%
Gurley190+2.7%2.0%

5 incorporated places, 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).

Cheyenne County, Homes

Homes in Cheyenne County

Cheyenne County is a place of houses on their own lots: 77% of its 4,886 homes are detached single-family houses, against 72% across Nebraska. The homes are older than Nebraska's as a whole: half were built before 1957 (1975 for Nebraska), and 56% date from before 1960. 67% of occupied homes are lived in by their owner (Nebraska: 67%); in the rest a tenant can run a test, but a fix is the landlord's to make.

Homes in Cheyenne County, Nebraska, 2019 to 2023
HomesCheyenne CountyNebraska
Housing units4,886855,631
Detached houses77%72%
In buildings of 5 or more11%17%
Mobile homes4%3%
Built before 196056%32%
Built since 200013%22%
Middle year built19571975
Owner-occupied67%67%

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