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Radon Levels in Pawnee County, Kansas

EPA puts Pawnee County in Zone 1, its highest radon zone, and high results are common there: 43.4% of the 53 radon tests reported to CDC (2022) came back 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

  • Share at 4+ pCi/L

    43.4%

    11.4 pts above KS

    Pawnee
    43.4%
    Kansas
    32.0%

    53 tests, 2022

  • Median result

    3.7pCi/L

    Below action level

    Pawnee
    3.7 pCi/L
    EPA
    4.0 pCi/L

    Midpoint of the tests, 2022

  • Tests reported

    53

    27th of 38 by tests

    Pawnee
    53
    Johnson
    5,240

    Reported to CDC before any fix, 2022

  • 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 Kansas

    8 of 38

    Top quarter

    Pawnee
    43.4%
    Mitchell
    57.4%

    By share, of 38 with 30+ tests

Read a result for Pawnee County

Starts at Pawnee County's median, 3.7 pCi/L

3.7pCi/L

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

EPA’s reading of 3.7 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. Pawnee County's median reported result, 2022.

The data

Pawnee County, At a glance

Pawnee County at a glance

Predicted: EPA radon zone

EPA Zone 1: highest predicted potential

EPA puts all of Pawnee 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 58% of the county's area

Predicted: EPA Map of Radon Zones

Measured: tests reported to CDC

Radon tests reported for Pawnee County, 2022

Share of reported tests at or above 4 pCi/L, by year, Pawnee County
Share of reported tests at or above 4 pCi/L, by year, Pawnee County
YearShare of reported tests at or above 4 pCi/L
201642.1%
201766.7%
201872.7%
201966.7%
202054.2%
202156.3%
202243.4%

2022: 43.4%. Across these years the share ran from 42.1% to 72.7%. Each column counts radon tests reported to CDC that year, not homes.

What these figures count

These are the 53 tests reported to CDC for Pawnee County over 2022, 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: 2022. Measured data period: 2016 to 2022 (every CDC figure on file).

How to read these figures

Pawnee County, Compared

Pawnee County radon figures, compared

Calculated by Radon411

In Pawnee County, about 4 in 10 reported tests in 2022 (23 of 53) were at or above EPA's action level. Against the national pool of 23.9%, the gap is 19.5 points higher. Across 96 Kansas counties pooled together, 32.0% of tests reached that level, so Pawnee County runs 11.4 points above its state.

Barton County, the one bordering county with a figure for the same period, reported 53.8%. By share, Pawnee County is 8th of 38 Kansas counties with 30 or more tests for the same period.

Year by year, 2019 opened at 66.7% and 2022 closed at 43.4% (down 23.3 points), with 2019 the high at 66.7%. Half the tests came in under 3.7 pCi/L and half over it; the single highest reached 19.2 pCi/L. Below the action level, 17 tests (32.1%) came in under 2 pCi/L, against 45.8% statewide, and 13 tests (24.5%) fell between 2 and 4, against 22.1% statewide.

Zone 1 on EPA's map (predicted average above 4 pCi/L) and a 43.4% share point the same way here. USGS geology rates 58% of the county's land high radon potential.

The busiest year on file was 2021, with 96 tests reported; the quietest, 2017, had 9.

Share of reported tests at or above 4 pCi/L by year, Pawnee County against Kansas2019 to 2022, years with 30 or more tests: Pawnee County 66.7% to 43.4%, the state's pooled share 32.0% in 2022.
Pawnee CountyKansas, pooled
Share of reported tests at or above 4 pCi/L by year, Pawnee County against Kansas: data table
YearTestsPawnee County, at or above 4 pCi/LKansas, pooled
20193366.7%33.7%
20219656.3%31.8%
20225343.4%32.0%
Pawnee County against Kansas, the United States and nearby counties, 2022
AreaTestsAt or above 4 pCi/LMedianDifference from Pawnee County
Pawnee County5343.4%3.7 pCi/LThis county
Kansas, pooled96 counties, pooled18,38532.0%Not pooled−11.4 points
United States, pooled853 counties, pooled333,14023.9%Not pooled−19.5 points
Mitchell Countyhighest in the state4757.4%6.2 pCi/L+14.0 points
Crawford Countylowest in the state345.9%0.8 pCi/L−37.5 points
Ness County, KSborders it2669.2%10.2 pCi/L+25.8 points
Barton County, KSborders it3953.8%4.1 pCi/L+10.4 points
Stafford County, KSborders it650.0%4.2 pCi/L+6.6 points
Rush County, KSborders it333.3%3.4 pCi/L−10.1 points
Edwards County, KSborders it1030.0%2.4 pCi/L−13.4 points
Where Pawnee County's reported results fell, 2022, beside Kansas and the United States
ResultPawnee County testsPawnee County shareKansas shareU.S. shareAgainst Kansas
Under 2 pCi/L1732.1%45.8%54.5%−13.7 points
2 to 4 pCi/L1324.5%22.1%21.7%+2.4 points
4 pCi/L and above2343.4%32.0%23.9%+11.4 points
Pawnee County ranked among the 38 Kansas counties with 30 or more tests, by share at or above 4 pCi/L, 2022
CountyRankTestsAt or above 4 pCi/LMedian
Cloud County3 of 389754.6%4.3 pCi/L
Barton County4 of 383953.8%4.1 pCi/L
Republic County5 of 383452.9%4.3 pCi/L
Saline County6 of 3872952.3%4.2 pCi/L
McPherson County7 of 3821551.6%4.1 pCi/L
Pawnee County8 of 385343.4%3.7 pCi/L
Atchison County9 of 386041.7%3.3 pCi/L
Johnson County10 of 385,24041.2%3.0 pCi/L
Miami County11 of 3821440.2%3.0 pCi/L
Marion County12 of 384540.0%2.5 pCi/L
Cowley County13 of 3811839.8%3.3 pCi/L
Pawnee County radon tests by year, against Kansas' pooled share
YearTestsAt or above 4 pCi/LMedianHighestKansas, pooledChange from the row before
20225343.4%3.7 pCi/L19.2 pCi/L32.0%−12.9 points
20219656.3%4.3 pCi/L19.1 pCi/L31.8%+2.1 points
20202454.2%4.1 pCi/L12.1 pCi/L31.3%−12.5 points
20193366.7%4.9 pCi/L9.2 pCi/L33.7%−6.0 points
20181172.7%4.3 pCi/L15.8 pCi/L37.3%+6.0 points
2017966.7%6.6 pCi/L9.7 pCi/L37.3%+24.6 points
20161942.1%1.7 pCi/L7.4 pCi/L35.4%First on file

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

Pawnee County, Geology

The ground under Pawnee County

Predicted

USGS's geologic map splits Pawnee County: 58.3% of its land is high radon potential and 41.7% moderate. The map puts 51.6% of Pawnee County in the area it calls Smoky Hills and 41.7% in Arkansas River Lowlands, with one smaller area beside them. USGS gives the first a radon index of 12, in the high band (12 to 17), and the second 10, in the moderate band (9 to 11).

USGS's geologic areas under Pawnee County
AreaThe rock, in USGS's wordsPotentialRadon indexShare of land
Smoky HillsCretaceous marine sandstone, shale, and siltstone covered by discontinuous loess deposits.High1251.6%
Arkansas River LowlandsDune sands and alluvium.Moderate1041.7%
Ogallala FormationTertiary sandstone, in part covered by windblown eolian sand and loess deposits.High126.7%

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

Pawnee County beside the ground around it

On high-potential ground Pawnee County is close to Kansas as a whole: 58.3% of its land against 59.9%. Of the 6 counties that border it, 4 have more high-potential ground, Hodgeman County the most at 100%.

Share of land by USGS radon potential: Pawnee County, the 6 counties bordering it and Kansas
AreaEPA zoneLow potentialModerate potentialHigh potential
Pawnee CountyZone 1None41.7%58.3%
Edwards CountyZone 2None82.0%18.0%
Rush CountyZone 1NoneNone100%
Stafford CountyZone 2None97.8%2.2%
Barton CountyZone 1None23.9%76.1%
Hodgeman CountyZone 1NoneNone100%
Ness CountyZone 1NoneNone100%
Kansas105 counties, pooled by land areaVariesNone40.1%59.9%

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

What it means

Pawnee County, Questions

Questions about radon in Pawnee County

Are radon levels high in Pawnee County?

In 2022, 43.4% of the radon tests reported to CDC for Pawnee County, Kansas were at or above 4 pCi/L, and the median reported pre-mitigation result was 3.7 pCi/L. Of 38 Kansas counties with 30 or more tests for the same period, 7 reported a higher share; pooled, the state comes to 32.0%.

Which counties border Pawnee County?

Pawnee County borders 6 counties: Edwards County, Rush County, Stafford County, Barton County, Hodgeman County and Ness County.

Products

Pawnee County, Products

Testing a home in Pawnee County

In Pawnee County, 43.4% of 53 tests reported to CDC in 2022 reached 4 pCi/L, against 32.0% pooled across Kansas. In Zone 1 the year-round level in Pawnee 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

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

Explore

Pawnee County, Bordering counties

Counties bordering Pawnee County

Calculated by Radon411

Pawnee County, Cities and towns

Cities and towns in Pawnee County

About 5,991 people live in Pawnee County by the Census Bureau's estimate for July 1, 2025, 260 fewer than in 2020 (−4.2%). Spread over its land, that is 7.9 people to the square mile. Larned alone is home to 3,596 of them, 60.0% of the total. Together its 4 incorporated places hold 67.7% of those residents; the other 32.3% live outside any of them. CDC's 53 reported tests for 2022 work out to 8.8 per 1,000 residents (2025 estimate), close to Kansas' 6.2.

From Larned to Rozel, CDC publishes no figure by town: each reads Pawnee County's.

The cities and towns in Pawnee County by residents, July 1, 2025
PlaceResidentsSince 2020Share of residents
Larned3,596−4.8%60.0%
Burdett216−4.4%3.6%
Garfield148−5.1%2.5%
Rozel94−6.0%1.6%

4 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).

Pawnee County, Homes

Homes in Pawnee County

Pawnee County is a place of houses on their own lots: 80% of its 3,045 homes are detached single-family houses, against 72% across Kansas. The homes are older than Kansas' as a whole: half were built before 1955 (1975 for Kansas), and 58% date from before 1960. 64% of occupied homes are lived in by their owner (Kansas: 67%); in the rest a tenant can run a test, but a fix is the landlord's to make.

Homes in Pawnee County, Kansas, 2019 to 2023
HomesPawnee CountyKansas
Housing units3,0451,285,221
Detached houses80%72%
In buildings of 5 or more6%13%
Mobile homes6%4%
Built before 196058%33%
Built since 200012%20%
Middle year built19551975
Owner-occupied64%67%

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