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Radon Levels in Kimball County, Nebraska

EPA puts Kimball County in Zone 2, its middle radon zone, and only 20 radon tests from it are on file with CDC (2023). Homes with elevated levels occur in all three zones, so only a test measures yours.

Data checked By Radon411Methodology

  • Share at 4+ pCi/L

    41.9%

    18.5 pts below NE

    Kimball
    41.9%
    Nebraska
    60.4%

    93 tests, 2005 to 2014

  • Median result

    3.3pCi/L

    Below action level

    Kimball
    3.3 pCi/L
    EPA
    4.0 pCi/L

    Midpoint of the tests, 2005 to 2014

  • Tests reported

    93

    52nd of 73 by tests

    Kimball
    93
    Douglas
    7,435

    Reported to CDC before any fix, 2005 to 2014

  • 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

    64 of 73

    Lowest quarter

    Kimball
    41.9%
    Clay
    85.9%

    By share, of 73 with 30+ tests

Read a result for Kimball County

Starts at Kimball County's median, 3.3 pCi/L

3.3pCi/L

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

EPA’s reading of 3.3 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. Kimball County's median reported result, 2005 to 2014.

The data

Kimball County, At a glance

Kimball County at a glance

Predicted: EPA radon zone

EPA Zone 2: moderate predicted potential

Kimball 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 Kimball County, 2023

Share of reported tests at or above 4 pCi/L, by year, Kimball County
Share of reported tests at or above 4 pCi/L, by year, Kimball County
YearShare of reported tests at or above 4 pCi/L
201442.9%
201568.8%
201641.7%
201766.7%
201855.6%
201962.5%
202063.6%
202144.4%
202250.0%
202340.0%

2023: 40.0%. Across these years the share ran from 40.0% to 68.8%. Each column counts radon tests reported to CDC that year, not homes.

What these figures count

Only 20 tests were reported to CDC for Kimball County over 2023, and tests are often run on homes being sold or already suspected of a problem: so few describe neither the county nor 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

Kimball County, Compared

Kimball County radon figures, compared

Calculated by Radon411

In Kimball County, about 4 in 10 reported tests over the 2005 to 2014 laboratory totals (39 of 93) were at or above EPA's action level. Against the national pool of 36.0%, the gap is 5.9 points higher. Across 93 Nebraska counties pooled together, 60.4% of tests reached that level, so Kimball County runs 18.5 points below its state.

The newest figure, in 2023, counts only 20 tests (40.0% at or above 4 pCi/L), too few to compare, so this reading uses the 93-test figure.

Of 4 neighbours with a figure, 2 reported a larger share at or above 4 pCi/L and 2 a smaller one; the spread is 25.6% (Laramie County, WY) to 50.7% (Cheyenne County). By share, Kimball County is 64th of 73 Nebraska counties with 30 or more tests for the same period.

Year by year, 2014 opened at 42.9% and 2020 closed at 63.6% (up 20.7 points), with 2015 the high at 68.8%. Half the tests came in under 3.3 pCi/L and half over it; the single highest reached 30.5 pCi/L. Below the action level, 15 tests (16.1%) came in under 2 pCi/L, against 17.5% statewide, and 39 tests (41.9%) fell between 2 and 4, against 22.1% statewide.

Zone 2 on EPA's map (predicted average between 2 and 4 pCi/L) and a 41.9% share point the same way here. USGS geology rates 100% of the county's land moderate radon potential.

The busiest year on file was 2018, with 54 tests reported; the quietest, 2022, had 8.

Share of reported tests at or above 4 pCi/L by year, Kimball County against Nebraska2014 to 2020, years with 30 or more tests: Kimball County 42.9% to 63.6%, the state's pooled share 42.2% in 2020.
Kimball CountyNebraska, pooled
Share of reported tests at or above 4 pCi/L by year, Kimball County against Nebraska: data table
YearTestsKimball County, at or above 4 pCi/LNebraska, pooled
20144242.9%50.5%
20154868.8%53.3%
20163641.7%47.4%
20185455.6%44.5%
20194862.5%44.3%
20203363.6%42.2%
Kimball County against Nebraska, the United States and nearby counties, 2005 to 2014, laboratory
AreaTestsAt or above 4 pCi/LMedianDifference from Kimball County
Kimball County9341.9%3.3 pCi/LThis county
Nebraska, pooled93 counties, pooled33,33960.4%Not pooled+18.5 points
United States, pooled2,655 counties, pooled1,669,35336.0%Not pooled−5.9 points
Clay Countyhighest in the state13585.9%8.6 pCi/L+44.0 points
Merrick Countylowest in the state11327.4%2.2 pCi/L−14.5 points
Cheyenne County, NEborders it26850.7%4.0 pCi/L+8.8 points
Weld County, COborders it2,63750.1%4.0 pCi/L+8.2 points
Banner County, NEborders it540.0%3.1 pCi/L−1.9 points
Logan County, COborders it5040.0%3.2 pCi/L−1.9 points
Laramie County, WYborders it1,78425.6%2.5 pCi/L−16.3 points
Where Kimball County's reported results fell, 2005 to 2014, laboratory, beside Nebraska and the United States
ResultKimball County testsKimball County shareNebraska shareU.S. shareAgainst Nebraska
Under 2 pCi/L1516.1%17.5%39.8%−1.4 points
2 to 4 pCi/L3941.9%22.1%24.2%+19.8 points
4 pCi/L and above3941.9%60.4%36.0%−18.5 points
Kimball County ranked among the 73 Nebraska counties with 30 or more tests, by share at or above 4 pCi/L, 2005 to 2014, laboratory
CountyRankTestsAt or above 4 pCi/LMedian
Sherman County59 of 737650.0%4.0 pCi/L
Perkins County59 of 733250.0%4.0 pCi/L
Holt County61 of 7328147.7%3.7 pCi/L
Brown County62 of 734845.8%3.8 pCi/L
Deuel County63 of 734942.9%3.5 pCi/L
Kimball County64 of 739341.9%3.3 pCi/L
Sheridan County64 of 739341.9%3.1 pCi/L
Dawson County66 of 7315239.5%3.1 pCi/L
Hall County67 of 7381737.5%3.2 pCi/L
Howard County68 of 739435.1%2.9 pCi/L
Box Butte County69 of 7331734.1%3.0 pCi/L
Kimball County radon tests by year, against Nebraska's pooled share
YearTestsAt or above 4 pCi/LMedianHighestNebraska, pooledChange from the row before
20232040.0%3.4 pCi/L10.5 pCi/L38.2%−10.0 points
2022850.0%4.7 pCi/L24.8 pCi/L34.0%+5.6 points
20212744.4%3.6 pCi/L6.4 pCi/L34.9%−19.2 points
20203363.6%5.0 pCi/L8.7 pCi/L42.2%+1.1 points
20194862.5%4.1 pCi/L57.2 pCi/L44.3%+6.9 points
20185455.6%4.8 pCi/L22.0 pCi/L44.5%−11.1 points
20171866.7%4.3 pCi/L5.6 pCi/L47.7%+25.0 points
20163641.7%3.3 pCi/L22.7 pCi/L47.4%−27.1 points
20154868.8%4.6 pCi/L7.3 pCi/L53.3%+25.9 points
20144242.9%3.3 pCi/L14.0 pCi/L50.5%First on file

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

Kimball County, Geology

The ground under Kimball County

Predicted

USGS's geologic map puts all of Kimball County's mapped land in one class: moderate radon potential. 97.3% of it lies in the area the map calls Tertiary Rocks, to which USGS gives a radon index of 11, in the moderate band (9 to 11).

USGS's geologic areas under Kimball County
AreaThe rock, in USGS's wordsPotentialRadon indexShare of land
Tertiary RocksTertiary sandstone, siltstone, and volcanic ash.Moderate1197.3%
White River FormationSiltstone, sandstone, conglomerate, volcanic tuff.Moderate112.7%

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

Kimball County beside the ground around it

Across Nebraska 40.9% of the land is rated high; none of Kimball County's is. Of the 5 counties that border it, 3 have more high-potential ground, Weld County, CO the most at 66.2%.

Share of land by USGS radon potential: Kimball County, the 5 counties bordering it and Nebraska
AreaEPA zoneLow potentialModerate potentialHigh potential
Kimball CountyZone 2None100%None
Banner CountyZone 2None100%None
Cheyenne CountyZone 2None100%None
Logan County, COZone 1None40.7%59.3%
Laramie County, WYZone 1None93.8%6.2%
Weld County, COZone 1None33.9%66.2%
Nebraska93 counties, pooled by land areaVaries28.2%30.9%40.9%

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

What it means

Kimball County, Questions

Questions about radon in Kimball County

Are radon levels high in Kimball County?

In 2023, 40.0% of the radon tests reported to CDC for Kimball County, Nebraska were at or above 4 pCi/L, and the median reported pre-mitigation result was 3.4 pCi/L. Of 73 Nebraska counties with 30 or more tests for the same period, 63 reported a higher share; pooled, the state comes to 60.4%.

Which counties border Kimball County?

Kimball County borders 5 counties: Banner County, NE, Cheyenne County, NE, Logan County, CO, Laramie County, WY and Weld County, CO.

Products

Kimball County, Products

Testing a home in Kimball County

In Kimball County, 41.9% of 93 tests reported to CDC over the 2005 to 2014 laboratory totals reached 4 pCi/L, against 60.4% pooled across Nebraska. In Zone 2 a short-term kit (2 to 90 days) is the quick first check in Kimball County; a long-term test tells the year-round average.

Test kits and monitors3

See every kit and monitor

Best radon monitors for Kimball County homes, compared

Explore

Kimball County, Bordering counties

Counties bordering Kimball County

Calculated by Radon411

Kimball County, Cities and towns

Cities and towns in Kimball County

About 3,391 people live in Kimball County by the Census Bureau's estimate for July 1, 2025, 18 fewer than in 2020 (−0.5%). Spread over its land, that is 3.6 people to the square mile. Kimball alone is home to 2,271 of them, 67.0% of the total. Together its 3 incorporated places hold 75.9% of those residents; the other 24.1% live outside any of them. Testing is reported here more often than across the state: CDC's 93 reported tests for 2005 to 2014 come to 27.4 for every 1,000 residents (2025 estimate), against 16.5 for Nebraska.

From Kimball to Bushnell, CDC publishes no figure by town: each reads Kimball County's.

The cities and towns in Kimball County by residents, July 1, 2025
PlaceResidentsSince 2020Share of residents
Kimball2,271−0.3%67.0%
Dix195+0.5%5.8%
Bushnell108−1.8%3.2%

3 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).

Kimball County, Homes

Homes in Kimball County

Kimball County is a place of houses on their own lots: 83% of its 1,812 homes are detached single-family houses, against 72% across Nebraska. The homes are older than Nebraska's as a whole: half were built before 1953 (1975 for Nebraska), and 64% date from before 1960. 72% 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 Kimball County, Nebraska, 2019 to 2023
HomesKimball CountyNebraska
Housing units1,812855,631
Detached houses83%72%
In buildings of 5 or more2%17%
Mobile homes9%3%
Built before 196064%32%
Built since 20006%22%
Middle year built19531975
Owner-occupied72%67%

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