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Radon Levels in Scott County, Kansas

EPA puts Scott County in Zone 1, its highest radon zone, and only 20 radon tests from it are on file with CDC (2022). 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

    61.5%

    27.8 pts above KS

    Scott
    61.5%
    Kansas
    33.7%

    39 tests, 2019

  • Median result

    6.1pCi/L

    Action level reached

    Scott
    6.1 pCi/L
    EPA
    4.0 pCi/L

    Midpoint of the tests, 2019

  • Tests reported

    39

    35th of 43 by tests

    Scott
    39
    Johnson
    10,603

    Reported to CDC before any fix, 2019

  • 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

    4 of 43

    Top quarter

    Scott
    61.5%
    Jewell
    71.9%

    By share, of 43 with 30+ tests

Read a result for Scott County

Starts at Scott County's median, 6.1 pCi/L

6.1pCi/L

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

EPA’s reading of 6.1 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. Scott County's median reported result, 2019.

Interpret this readingWhat a fix costs

The data

Scott County, At a glance

Scott County at a glance

Predicted: EPA radon zone

EPA Zone 1: highest predicted potential

EPA puts all of Scott 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 Scott County, 2022

Share of reported tests at or above 4 pCi/L, by year, Scott County
Share of reported tests at or above 4 pCi/L, by year, Scott County
YearShare of reported tests at or above 4 pCi/L
201657.1%
201760.0%
201850.0%
201961.5%
202077.3%
202137.5%
202275.0%

2022: 75.0%. Across these years the share ran from 37.5% to 77.3%. Each column counts radon tests reported to CDC that year, not homes.

What these figures count

Only 20 tests were reported to CDC for Scott County over 2022, 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: 2022. Measured data period: 2016 to 2022 (every CDC figure on file).

How to read these figures

Scott County, Compared

Scott County radon figures, compared

Calculated by Radon411

More than half: 61.5% of the 39 radon tests reported to CDC for Scott County in 2019 read at least 4 pCi/L. That places it 4th of 43 Kansas counties with 30 or more tests for the same period. That is 27.8 points above the 33.7% pooled from 102 Kansas counties.

The newest figure, in 2022, counts only 20 tests (75.0% at or above 4 pCi/L), too few to compare, so this reading uses the 39-test figure.

The median result, 6.1 pCi/L, sits above EPA's 4 pCi/L action level, and the top reported result was 16.0 pCi/L. The rest split 5.1% under 2 pCi/L and 33.3% from 2 to 4 (Kansas: 40.5% and 25.8%). Zone 1 on EPA's map (predicted average above 4 pCi/L) and a 61.5% share point the same way here.

Finney County, the one bordering county with a figure for the same period, reported 30.1%. Statewide for the same period, Jewell County reported the highest share (71.9%) and Reno County the lowest (20.8%).

The busiest year on file was 2019, with 39 tests reported; the quietest, 2018, had 18.

Nationally, every county with a figure for the same period pools to 29.0%; Scott County sits 32.5 points above it.

Scott County against Kansas, the United States and nearby counties, 2019
AreaTestsAt or above 4 pCi/LMedianDifference from Scott County
Scott County3961.5%6.1 pCi/LThis county
Kansas, pooled102 counties, pooled24,17633.7%Not pooled−27.8 points
United States, pooled828 counties, pooled391,41229.0%Not pooled−32.5 points
Jewell Countyhighest in the state3271.9%7.4 pCi/L+10.4 points
Reno Countylowest in the state30320.8%2.0 pCi/L−40.7 points
Gove County, KSborders it875.0%9.1 pCi/L+13.5 points
Kearny County, KSborders it862.5%5.5 pCi/L+1.0 points
Lane County, KSborders it450.0%7.3 pCi/L−11.5 points
Wichita County, KSborders it333.3%3.9 pCi/L−28.2 points
Finney County, KSborders it15630.1%3.0 pCi/L−31.4 points
Logan County, KSborders it728.6%3.5 pCi/L−32.9 points
Where Scott County's reported results fell, 2019, beside Kansas and the United States
ResultScott County testsScott County shareKansas shareU.S. shareAgainst Kansas
Under 2 pCi/L25.1%40.5%48.0%−35.4 points
2 to 4 pCi/L1333.3%25.8%23.0%+7.5 points
4 pCi/L and above2461.5%33.7%29.0%+27.8 points
Scott County ranked among the 43 Kansas counties with 30 or more tests, by share at or above 4 pCi/L, 2019
CountyRankTestsAt or above 4 pCi/LMedian
Jewell County1 of 433271.9%7.4 pCi/L
Phillips County2 of 433571.4%6.0 pCi/L
Pawnee County3 of 433366.7%4.9 pCi/L
Scott County4 of 433961.5%6.1 pCi/L
Nemaha County5 of 435060.0%4.5 pCi/L
Sherman County6 of 436358.7%4.6 pCi/L
Rice County7 of 433455.9%4.5 pCi/L
Cloud County8 of 436352.4%4.4 pCi/L
Seward County9 of 439252.2%4.0 pCi/L
Mitchell County10 of 434751.1%4.0 pCi/L
Ottawa County11 of 433148.4%3.9 pCi/L
Scott County radon tests by year, against Kansas' pooled share
YearTestsAt or above 4 pCi/LMedianHighestKansas, pooledChange from the row before
20222075.0%7.2 pCi/L16.4 pCi/L32.0%+37.5 points
20212437.5%3.8 pCi/L17.5 pCi/L31.8%−39.8 points
20202277.3%6.2 pCi/L12.3 pCi/L31.3%+15.8 points
20193961.5%6.1 pCi/L16.0 pCi/L33.7%+11.5 points
20181850.0%4.7 pCi/L19.4 pCi/L37.3%−10.0 points
20172560.0%6.9 pCi/L11.7 pCi/L37.3%+2.9 points
20163557.1%5.0 pCi/L13.9 pCi/L35.4%First on file

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

Scott County, Geology

The ground under Scott County

Predicted

USGS's geologic map puts all of Scott County's mapped land in one class: high radon potential. 98.9% 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 Scott County
AreaThe rock, in USGS's wordsPotentialRadon indexShare of land
Ogallala FormationTertiary sandstone, in part covered by windblown eolian sand and loess deposits.High1298.9%
Smoky HillsCretaceous marine sandstone, shale, and siltstone covered by discontinuous loess deposits.High121.1%

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

Scott County beside the ground around it

Scott County has more high-potential ground than Kansas as a whole: 100% of its land against 59.9%. Of the 6 counties that border it, none has as large a share of high-potential ground; Gove County comes nearest at 100%.

Share of land by USGS radon potential: Scott County, the 6 counties bordering it and Kansas
AreaEPA zoneLow potentialModerate potentialHigh potential
Scott CountyZone 1NoneNone100%
Wichita CountyZone 1NoneNone100%
Lane CountyZone 1NoneNone100%
Logan CountyZone 1NoneNone100%
Kearny CountyZone 1None31.3%68.7%
Gove CountyZone 1NoneNone100%
Finney CountyZone 1None28.9%71.1%
Kansas105 counties, pooled by land areaVariesNone40.1%59.9%

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

Local help

Scott County, Local resources

Radon testing and mitigation in Scott County

What Kansas's program says
Phone
(800) 693-5343

What it means

Scott County, Questions

Questions about radon in Scott County

Are radon levels high in Scott County?

In 2022, 75.0% of the radon tests reported to CDC for Scott County, Kansas were at or above 4 pCi/L, and the median reported pre-mitigation result was 7.2 pCi/L. Of 43 Kansas counties with 30 or more tests for the same period, 3 reported a higher share; pooled, the state comes to 33.7%.

Which counties border Scott County?

Scott County borders 6 counties: Wichita County, Lane County, Logan County, Kearny County, Gove County and Finney County.

Products

Scott County, Products

Testing a home in Scott County

In Scott County, 61.5% of 39 tests reported to CDC in 2019 reached 4 pCi/L, against 33.7% pooled across Kansas. In Zone 1 the year-round level in Scott 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

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

Explore

Scott County, Bordering counties

Counties bordering Scott County

Calculated by Radon411

Scott County, Cities and towns

Cities and towns in Scott County

Scott County has been losing residents: from 5,141 in 2020 to 4,815 on July 1, 2025, a fall of 6.3% by the Census Bureau's estimates. Spread over its land, that is 6.7 people to the square mile. Scott City, its one incorporated place, has 3,855 residents, 80.1% of the total. CDC's 39 reported tests for 2019 work out to 8.1 per 1,000 residents (2025 estimate), close to Kansas' 8.1.

Scott City is the one incorporated place here; CDC publishes no figure by town, so it reads Scott County's.

Scott City, Scott County: residents on July 1, 2025
PlaceResidentsSince 2020Share of residents
Scott City3,855−6.2%80.1%

One incorporated place, 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).

Scott County, Homes

Homes in Scott County

Scott County is a place of houses on their own lots: 86% of its 2,271 homes are detached single-family houses, against 72% across Kansas. The homes are older than Kansas' as a whole: half were built before 1959 (1975 for Kansas), and 53% date from before 1960. 53% 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 Scott County, Kansas, 2019 to 2023
HomesScott CountyKansas
Housing units2,2711,285,221
Detached houses86%72%
In buildings of 5 or more5%13%
Mobile homes1%4%
Built before 196053%33%
Built since 200014%20%
Middle year built19591975
Owner-occupied53%67%

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