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Radon Levels in Kit Carson County, Colorado

EPA puts Kit Carson County in Zone 1, its highest radon zone, and only 29 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

How to test this homeFind a certified tester

  • Share at 4+ pCi/L

    71.4%

    24.4 pts above CO

    Kit Carson
    71.4%
    Colorado
    47.0%

    42 tests, 2008 to 2017

  • Median result

    5.3pCi/L

    Action level reached

    Kit Carson
    5.3 pCi/L
    EPA
    4.0 pCi/L

    Midpoint of the tests, 2008 to 2017

  • Tests reported

    42

    45th of 50 by tests

    Kit Carson
    42
    Jefferson
    11,723

    Reported to CDC before any fix, 2008 to 2017

  • EPA radon zone

    Zone 1

    Highest potential

    1. Zone 1
    2. 2
    3. 3

    1 highest, 3 lowest

    EPA predicts over 4 pCi/L indoors

  • Rank in Colorado

    1 of 50

    Top quarter

    Kit Carson
    71.4%
    Kit Carson
    71.4%

    By share, of 50 with 30+ tests

Read a result for Kit Carson County

Starts at Kit Carson County's median, 5.3 pCi/L

5.3pCi/L

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

EPA’s reading of 5.3 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. Kit Carson County's median reported result, 2008 to 2017.

Interpret this readingWhat a fix costs

The data

Kit Carson County, At a glance

Kit Carson County at a glance

Predicted: EPA radon zone

EPA Zone 1: highest predicted potential

EPA puts all of Kit Carson County in and predicts an average indoor of greater than 4 pCi/L (greater than 150 Bq/m³) across the county. That is one forecast for the whole county, not a reading of any address in it; homes above EPA's turn up in all three zones.

USGS geologic potential: High across 100% of the county's area

Predicted: EPA Map of Radon Zones

Measured: tests reported to CDC

Radon tests reported for Kit Carson County, 2023

Share of reported tests at or above 4 pCi/L, by year, Kit Carson County
Share of reported tests at or above 4 pCi/L, by year, Kit Carson County
YearShare of reported tests at or above 4 pCi/L
201483.3%
20150.0%
2016100.0%
201755.6%
201850.0%
201984.6%
2020100.0%
202177.8%
202275.0%
202337.9%

2023: 37.9%. Across these years the share ran from 0.0% to 100.0%. Each column counts radon tests reported to CDC that year, not homes.

What these figures count

Only 29 tests were reported to CDC for Kit Carson 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

Kit Carson County, Compared

Kit Carson County radon figures, compared

Calculated by Radon411

More than half: 71.4% of the 42 radon tests reported to CDC for Kit Carson County over the 2008 to 2017 laboratory totals read at least 4 pCi/L. That places it 1st of 50 Colorado counties with 30 or more tests for the same period. That is 24.4 points above the 47.0% pooled from 63 Colorado counties.

The newest figure, in 2023, counts only 29 tests (37.9% at or above 4 pCi/L), too few to compare, so this reading uses the 42-test figure.

The median result, 5.3 pCi/L, sits above EPA's 4 pCi/L action level, and the top reported result was 20.8 pCi/L. The rest split 11.9% under 2 pCi/L and 16.7% from 2 to 4 (Colorado: 31.4% and 21.5%). Zone 1 on EPA's map (predicted average above 4 pCi/L) and a 71.4% share point the same way here.

No bordering county with a figure for the same period reported a higher share; the closest is Washington County at 62.8%, the lowest Yuma County at 57.1%. Statewide for the same period, Pueblo County reported the highest share (70.1%) and Alamosa County the lowest (26.6%).

The busiest year on file was 2023, with 29 tests reported; the quietest, 2016, had 2.

Nationally, every county with a figure for the same period pools to 35.7%; Kit Carson County sits 35.7 points above it.

Kit Carson County against Colorado, the United States and nearby counties, 2008 to 2017, laboratory
AreaTestsAt or above 4 pCi/LMedianDifference from Kit Carson County
Kit Carson County4271.4%5.3 pCi/LThis county
Colorado, pooled63 counties, pooled96,36747.0%Not pooled−24.4 points
United States, pooled2,661 counties, pooled2,013,54435.7%Not pooled−35.7 points
Pueblo Countyhighest in the state3,52470.1%6.2 pCi/L−1.3 points
Alamosa Countylowest in the state7926.6%2.1 pCi/L−44.8 points
Cheyenne County, COborders it666.7%4.9 pCi/L−4.7 points
Washington County, COborders it8662.8%4.6 pCi/L−8.6 points
Yuma County, COborders it3557.1%4.0 pCi/L−14.3 points
Lincoln County, COborders it1650.0%4.0 pCi/L−21.4 points
Where Kit Carson County's reported results fell, 2008 to 2017, laboratory, beside Colorado and the United States
ResultKit Carson County testsKit Carson County shareColorado shareU.S. shareAgainst Colorado
Under 2 pCi/L511.9%31.4%39.6%−19.5 points
2 to 4 pCi/L716.7%21.5%24.7%−4.8 points
4 pCi/L and above3071.4%47.0%35.7%+24.4 points
Kit Carson County ranked among the 50 Colorado counties with 30 or more tests, by share at or above 4 pCi/L, 2008 to 2017, laboratory
CountyRankTestsAt or above 4 pCi/LMedian
Kit Carson County1 of 504271.4%5.3 pCi/L
Pueblo County2 of 503,52470.1%6.2 pCi/L
Baca County3 of 503167.7%4.8 pCi/L
Gilpin County4 of 5024064.6%6.8 pCi/L
Washington County5 of 508662.8%4.6 pCi/L
Las Animas County6 of 5018161.9%5.4 pCi/L
Montrose County7 of 501,37060.7%5.1 pCi/L
Chaffee County8 of 5052560.4%5.1 pCi/L
Rio Blanco County9 of 503560.0%4.6 pCi/L
Teller County10 of 501,12159.6%5.2 pCi/L
Bent County11 of 503259.4%4.2 pCi/L
Kit Carson County radon tests by year, against Colorado's pooled share
YearTestsAt or above 4 pCi/LMedianHighestColorado, pooledChange from the row before
20232937.9%3.3 pCi/L7.7 pCi/L38.9%−37.1 points
20221275.0%7.4 pCi/L17.1 pCi/L38.6%−2.8 points
2021977.8%4.5 pCi/L7.2 pCi/L47.3%−22.2 points
20203100.0%6.0 pCi/L7.1 pCi/L41.9%+15.4 points
20191384.6%7.0 pCi/L19.1 pCi/L44.1%+34.6 points
2018450.0%7.3 pCi/L14.1 pCi/L44.2%−5.6 points
2017955.6%4.5 pCi/L18.1 pCi/L41.0%−44.4 points
20162100.0%5.5 pCi/L6.3 pCi/L38.5%+100.0 points
201560.0%1.0 pCi/L3.6 pCi/L47.2%−83.3 points
2014683.3%5.5 pCi/L16.0 pCi/L46.5%First on file

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

Kit Carson County, State data

Colorado's own radon test data

Measured

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

MeasuredState figures, not CDC's

What Colorado CDPHE reports for Kit Carson County

Radon data (county results): radon test results received from radon testing labs, primarily short-term household tests taken by the homeowner. Period: 2005-2025.

Share over 4 pCi/L

48.9%

69 of 141 tests

Median result

3.8 pCi/L

Highest result

20.8 pCi/L

Tests behind these figures

141 tests

  • CDPHE says these data do not give actual radon levels in homes that have not been tested.
  • When possible, only tests conducted before a mitigation system was installed are used.
  • Some counties have very small numbers of test results, and their summaries may be less representative.
  • These figures describe tests reported to Colorado CDPHE in this area. They count a different set of tests than CDC's figures and are not a reading of any one home.

Measured: Colorado CDPHE data, 2005-2025.

Kit Carson County, Geology

The ground under Kit Carson County

Predicted

USGS's geologic map puts all of Kit Carson County's mapped land in one class: high radon potential. 97.4% of it lies in the area the map calls Ogallala Formation, to which USGS gives a radon index of 12, in the high band (12 to 17).

USGS's geologic areas under Kit Carson County
AreaThe rock, in USGS's wordsPotentialRadon indexShare of land
Ogallala FormationTertiary sandstone, in part covered by windblown eolian sand and loess deposits.High1297.4%
High PlainsQuaternary deposits and Cretaceous marine shales that locally have a high radiometric signature.High122.6%

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

Kit Carson County beside the ground around it

Kit Carson County has more high-potential ground than Colorado as a whole: 100% of its land against 74.8%. Of the 7 counties that border it, none has as large a share of high-potential ground; Cheyenne County comes nearest at 100%.

Share of land by USGS radon potential: Kit Carson County, the 7 counties bordering it and Colorado
AreaEPA zoneLow potentialModerate potentialHigh potential
Kit Carson CountyZone 1NoneNone100%
Cheyenne CountyZone 1NoneNone100%
Sherman County, KSZone 1NoneNone100%
Washington CountyZone 1None9.6%90.4%
Lincoln CountyZone 1NoneNone100%
Yuma CountyZone 1None49.2%50.8%
Cheyenne County, KSZone 1None3.6%96.4%
Wallace County, KSZone 1NoneNone100%
Colorado64 counties, pooled by land areaVariesNone25.2%74.8%

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

Local help

Kit Carson County, Local resources

Radon testing and mitigation in Kit Carson County

What Colorado's program says
Licensing of radon professionals
Listed contractors are certified by the National Radon Proficiency Program or the National Radon Safety Board, and must be licensed by the Colorado Department of Regulatory Agencies.
Disclosure when a home is sold or rented
As of August 7, 2023, landlords in Colorado are required to disclose radon information when a tenant signs a lease agreement.

What it means

Kit Carson County, Questions

Questions about radon in Kit Carson County

Are radon levels high in Kit Carson County?

In 2023, 37.9% of the radon tests reported to CDC for Kit Carson County, Colorado were at or above 4 pCi/L, and the median reported pre-mitigation result was 3.3 pCi/L. Of 50 Colorado counties with 30 or more tests for the same period, none reported a higher share; pooled, the state comes to 47.0%.

Which counties border Kit Carson County?

Kit Carson County borders 7 counties: Cheyenne County, CO, Sherman County, KS, Washington County, CO, Lincoln County, CO, Yuma County, CO, Cheyenne County, KS and Wallace County, KS.

Products

Kit Carson County, Products

Testing a home in Kit Carson County

In Kit Carson County, 71.4% of 42 tests reported to CDC over the 2008 to 2017 laboratory totals reached 4 pCi/L, against 47.0% pooled across Colorado. In Zone 1 the year-round level in Kit Carson County is the one to know: a long-term test (more than 90 days) or a monitor, with a short-term kit for a first answer.

Test kits and monitors3

See every kit and monitor

Kit Carson County is in EPA Zone 1, the highest predicted radon potential. Best radon monitors for Zone 1 counties like Kit Carson County

Explore

Kit Carson County, Bordering counties

Counties bordering Kit Carson County

Calculated by Radon411

Kit Carson County, Cities and towns

Cities and towns in Kit Carson County

Kit Carson County's population has barely moved since 2020: 7,069 residents on July 1, 2025 against 7,062 then, by the Census Bureau's estimates. Spread over its land, that is 3.3 people to the square mile. Its largest town, Burlington, has 3,164 residents, 44.8% of the total. Together its 6 incorporated places hold 68.6% of those residents; the other 31.4% live outside any of them. Reported testing is thin here: 42 tests over 2008 to 2017, or 5.9 for every 1,000 residents (2025 estimate), where Colorado as a whole comes to 16.0.

From Burlington to Vona, CDC publishes no figure by town: each reads Kit Carson County's.

The cities and towns in Kit Carson County by residents, July 1, 2025
PlaceResidentsSince 2020Share of residents
Burlington3,164−0.3%44.8%
Stratton644−0.9%9.1%
Flagler584+3.5%8.3%
Bethune190+4.4%2.7%
Seibert178+2.9%2.5%
Vona89−1.1%1.3%

6 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).

Kit Carson County, Homes

Homes in Kit Carson County

Kit Carson County is a place of houses on their own lots: 79% of its 3,426 homes are detached single-family houses, against 62% across Colorado. The homes are older than Colorado's as a whole: half were built before 1970 (1987 for Colorado), and 38% date from before 1960. 68% of occupied homes are lived in by their owner (Colorado: 66%); in the rest a tenant can run a test, but a fix is the landlord's to make.

Homes in Kit Carson County, Colorado, 2019 to 2023
HomesKit Carson CountyColorado
Housing units3,4262,545,124
Detached houses79%62%
In buildings of 5 or more7%22%
Mobile homes10%4%
Built before 196038%16%
Built since 20007%31%
Middle year built19701987
Owner-occupied68%66%

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