Locations and reports
Radon Levels in Kansas
What this means for you
- Your area: EPA rates 65 of Kansas's 105 classified counties Zone 1, the highest of its three radon zones. Zones are predictions for whole counties, and homes with elevated levels occur in all three zones.
- Local tests: CDC publishes Kansas's radon test results by county. Open your county below to see its figures.
- Your home: The only way to know your home’s level is to test it.
pCi/L (picocuries per liter) is the unit radon is measured in. EPA recommends fixing a home at 4 pCi/L or above, its action level.
For Kansas, EPA's Map of Radon Zones places 65 of its 105 classified counties in Zone 1, highest predicted potential, a prediction for each county as a whole. Radon levels vary from home to home, so only a test measures the level in yours.
Predicted: EPA radon zone
105 of 105 counties classified
EPA classifies counties, not states. Of the 105 counties in Kansas with a zone, 65 are in Zone 1 and 40 in Zone 2.
- Zone 1: Highest predicted potentialgreater than 4 pCi/L65 of 105 counties · 61.9%
- Zone 2: Moderate predicted potential2 to 4 pCi/L40 of 105 counties · 38.1%
An EPA radon zone describes predicted potential across a whole county. It is not intended to determine whether any individual home should be tested, and homes with elevated levels occur in all three zones. EPA recommends testing every home regardless of zone, and testing is the only way to know the radon level in a specific building.
This is a county-level geologic prediction. It is not a measurement of any address, and houses with elevated radon are found in all three zones.
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
CDC publishes Kansas's radon test figures by county: 104 of its 105 counties have one. Each county's share is in the county list.
Kansas, In figures
Kansas in figures
What the published data says about Kansas, in words. A zone and a share of tests describe an area, never the level in any one home.
Predicted
PredictedEPA places 65 of Kansas's 105 counties in Zone 1 and 40 in Zone 2.
Zone 1 counties, A to Z, begin with Atchison County, Barton County and Brown County; the county section below lists all 65.
Compared
Calculated by Radon41162% of Kansas's counties with a zone on file are in Zone 1, a larger share than across all U.S. counties (34%). It is a share of counties, not of land, people or homes.
Reported tests
MeasuredCDC has no statewide testing figure for Kansas on file here.
104 of the 105 counties have a published county figure; the most tests in each one's latest year were reported for Johnson County (4,049 in 2022), Sedgwick County (2,829 in 2022) and Riley County (602 in 2022).
Local record
Kansas's radon program is the Kansas Radon Program; its contacts are under Local resources.
3 cities have a page setting the figures of the counties it lies in side by side: Lawrence, Manhattan and Topeka.
Kansas, Counties
Kansas counties by EPA zone
PredictedAll 105 counties, by the zone EPA predicts for each. Every county has its own report.
Zone 1: highest predicted potential65
- Atchison County41.7% of reported tests at or above 4 pCi/L, 2022
- Barton County53.8% of reported tests at or above 4 pCi/L, 2022
- Brown County60.0% of reported tests at or above 4 pCi/L, 2022
- Cheyenne County28.6% of reported tests at or above 4 pCi/L, 2020
- Clay County55.8% of reported tests at or above 4 pCi/L, 2022
- Cloud County54.6% of reported tests at or above 4 pCi/L, 2022
- Decatur County100.0% of reported tests at or above 4 pCi/L, 2022
- Dickinson County38.9% of reported tests at or above 4 pCi/L, 2022
- Douglas County25.8% of reported tests at or above 4 pCi/L, 2022
- Ellis County29.8% of reported tests at or above 4 pCi/L, 2022
- Ellsworth County35.3% of reported tests at or above 4 pCi/L, 2022
- Finney County23.7% of reported tests at or above 4 pCi/L, 2022
- Ford County36.0% of reported tests at or above 4 pCi/L, 2022
- Geary County25.2% of reported tests at or above 4 pCi/L, 2022
- Gove County66.7% of reported tests at or above 4 pCi/L, 2022
- Graham County100.0% of reported tests at or above 4 pCi/L, 2022
- Grant County0.0% of reported tests at or above 4 pCi/L, 2022
- Gray County35.7% of reported tests at or above 4 pCi/L, 2022
- Greeley County100.0% of reported tests at or above 4 pCi/L, 2020
- Hamilton County0.0% of reported tests at or above 4 pCi/L, 2020
- Haskell County60.0% of reported tests at or above 4 pCi/L, 2021
- Hodgeman County50.0% of reported tests at or above 4 pCi/L, 2021
- Jackson County23.8% of reported tests at or above 4 pCi/L, 2022
- Jewell County58.3% of reported tests at or above 4 pCi/L, 2022
- Johnson County41.2% of reported tests at or above 4 pCi/L, 2022
- Kearny County50.0% of reported tests at or above 4 pCi/L, 2022
- Kingman County19.0% of reported tests at or above 4 pCi/L, 2022
- Kiowa County100.0% of reported tests at or above 4 pCi/L, 2022
- Lane County87.5% of reported tests at or above 4 pCi/L, 2022
- Leavenworth County26.8% of reported tests at or above 4 pCi/L, 2022
- Lincoln County22.2% of reported tests at or above 4 pCi/L, 2022
- Logan County55.6% of reported tests at or above 4 pCi/L, 2022
- Marion County40.0% of reported tests at or above 4 pCi/L, 2022
- Marshall County31.8% of reported tests at or above 4 pCi/L, 2022
- McPherson County51.6% of reported tests at or above 4 pCi/L, 2022
- Meade County55.6% of reported tests at or above 4 pCi/L, 2022
- Mitchell County57.4% of reported tests at or above 4 pCi/L, 2022
- Nemaha County64.3% of reported tests at or above 4 pCi/L, 2022
- Ness County69.2% of reported tests at or above 4 pCi/L, 2022
- Norton County41.7% of reported tests at or above 4 pCi/L, 2022
- Osborne County82.6% of reported tests at or above 4 pCi/L, 2022
- Ottawa County32.0% of reported tests at or above 4 pCi/L, 2022
- Pawnee County43.4% of reported tests at or above 4 pCi/L, 2022
- Phillips County54.5% of reported tests at or above 4 pCi/L, 2022
- Pottawatomie County25.2% of reported tests at or above 4 pCi/L, 2022
- Pratt County28.6% of reported tests at or above 4 pCi/L, 2022
- Rawlins County80.0% of reported tests at or above 4 pCi/L, 2022
- Republic County52.9% of reported tests at or above 4 pCi/L, 2022
- Rice County28.3% of reported tests at or above 4 pCi/L, 2022
- Riley County31.3% of reported tests at or above 4 pCi/L, 2022
- Rooks County60.0% of reported tests at or above 4 pCi/L, 2022
- Rush County33.3% of reported tests at or above 4 pCi/L, 2022
- Russell County75.0% of reported tests at or above 4 pCi/L, 2022
- Saline County52.3% of reported tests at or above 4 pCi/L, 2022
- Scott County75.0% of reported tests at or above 4 pCi/L, 2022
- Sheridan County60.0% of reported tests at or above 4 pCi/L, 2022
- Sherman County44.4% of reported tests at or above 4 pCi/L, 2022
- Smith County33.3% of reported tests at or above 4 pCi/L, 2022
- Stanton County0.0% of reported tests at or above 4 pCi/L, 2022
- Thomas County56.5% of reported tests at or above 4 pCi/L, 2022
- Trego County83.3% of reported tests at or above 4 pCi/L, 2022
- Wallace County66.7% of reported tests at or above 4 pCi/L, 2022
- Washington County43.8% of reported tests at or above 4 pCi/L, 2022
- Wichita County100.0% of reported tests at or above 4 pCi/L, 2022
- Wyandotte County29.7% of reported tests at or above 4 pCi/L, 2022
Zone 2: moderate predicted potential40
- Allen County8.8% of reported tests at or above 4 pCi/L, 2022
- Anderson County41.7% of reported tests at or above 4 pCi/L, 2022
- Barber County0.0% of reported tests at or above 4 pCi/L, 2022
- Bourbon County57.1% of reported tests at or above 4 pCi/L, 2022
- Butler County25.5% of reported tests at or above 4 pCi/L, 2022
- Chase County66.7% of reported tests at or above 4 pCi/L, 2022
- Chautauqua County50.0% of reported tests at or above 4 pCi/L, 2021
- Cherokee County63.6% of reported tests at or above 4 pCi/L, 2022
- Clark County33.3% of reported tests at or above 4 pCi/L, 2021
- Coffey County56.3% of reported tests at or above 4 pCi/L, 2022
- Comanche CountyReported testing not yet available
- Cowley County39.8% of reported tests at or above 4 pCi/L, 2022
- Crawford County5.9% of reported tests at or above 4 pCi/L, 2022
- Doniphan County100.0% of reported tests at or above 4 pCi/L, 2022
- Edwards County30.0% of reported tests at or above 4 pCi/L, 2022
- Elk County50.0% of reported tests at or above 4 pCi/L, 2021
- Franklin County34.0% of reported tests at or above 4 pCi/L, 2022
- Greenwood County16.7% of reported tests at or above 4 pCi/L, 2022
- Harper County16.7% of reported tests at or above 4 pCi/L, 2022
- Harvey County34.1% of reported tests at or above 4 pCi/L, 2022
- Jefferson County39.6% of reported tests at or above 4 pCi/L, 2022
- Labette County16.0% of reported tests at or above 4 pCi/L, 2022
- Linn County53.3% of reported tests at or above 4 pCi/L, 2022
- Lyon County31.9% of reported tests at or above 4 pCi/L, 2022
- Miami County40.2% of reported tests at or above 4 pCi/L, 2022
- Montgomery County11.6% of reported tests at or above 4 pCi/L, 2022
- Morris County43.5% of reported tests at or above 4 pCi/L, 2022
- Morton County40.0% of reported tests at or above 4 pCi/L, 2022
- Neosho County20.0% of reported tests at or above 4 pCi/L, 2022
- Osage County42.3% of reported tests at or above 4 pCi/L, 2022
- Reno County25.4% of reported tests at or above 4 pCi/L, 2022
- Sedgwick County18.4% of reported tests at or above 4 pCi/L, 2022
- Seward County9.5% of reported tests at or above 4 pCi/L, 2022
- Shawnee County34.5% of reported tests at or above 4 pCi/L, 2022
- Stafford County50.0% of reported tests at or above 4 pCi/L, 2022
- Stevens County0.0% of reported tests at or above 4 pCi/L, 2022
- Sumner County29.1% of reported tests at or above 4 pCi/L, 2022
- Wabaunsee County29.0% of reported tests at or above 4 pCi/L, 2022
- Wilson County25.0% of reported tests at or above 4 pCi/L, 2022
- Woodson County0.0% of reported tests at or above 4 pCi/L, 2022
Kansas, Cities
Cities in Kansas with their own page
Radon data is published by county, not by city. Each city page sets the figures of the counties the city lies in side by side.
Kansas, Local resources
Local resources in Kansas
Who to ask in Kansas: the state's radon program, test kits and professionals.
Kansas Radon Program
Kansas’s radon program answers questions about testing, mitigation and the rules where you live.
- Phone
- (800) 693-5343
Test kits
Ask the program whether it has free or discounted kits, or compare kits you can buy.
Radon professionals
No professionals are listed in Kansas yet. The state program can point you to registered testers and mitigators.
See the Kansas directoryKansas, Questions
Questions about radon in Kansas
Common questions9 questions, answered from the figures above
Is radon a problem in Kansas?
EPA's Map of Radon Zones places 65 of the 105 Kansas counties it classifies in Zone 1, the highest predicted potential, 40 in Zone 2 and 0 in Zone 3. An EPA radon zone describes predicted potential across a whole county. It is not intended to determine whether any individual home should be tested, and homes with elevated levels occur in all three zones. EPA recommends testing every home regardless of zone, and testing is the only way to know the radon level in a specific building.
How do I get a radon test in Kansas?
EPA says you can test your home yourself or hire a qualified radon test company, and that either approach takes only a small amount of time and effort. The Kansas radon program is the place to ask about certified testers and any test kit offer it runs.
How to test a homeFree and low-cost kits by stateKansas radon program
Which Kansas counties are in EPA radon Zone 1?
65 counties are in Zone 1: Atchison County, Barton County, Brown County, Cheyenne County, Clay County, Cloud County, Decatur County, Dickinson County, and 57 more in the county table on this page. Zone 1 is EPA's class for highest predicted potential, a predicted average indoor screening level greater than 4 pCi/L. A zone is a prediction for a county, not a measurement of any home.
Radon in Atchison CountyRadon in Barton CountyRadon in Brown County
Who does radon mitigation in Kansas?
Radon411 has no certified mitigators listed for Kansas yet. EPA recommends having a qualified contractor fix a home with a radon problem, because lowering high radon levels takes technical knowledge and special skills, and some states require the work to be done by a licensed or certified professional.
How radon mitigation worksWhat mitigation costsRadon professionals in Kansas
Which Kansas counties have the highest radon?
105 of Kansas's 105 counties have an EPA radon zone published here. Radon411 will not rank counties on data it does not hold, and a zone is a prediction for an area rather than a measurement of any building.
What share of radon tests in Kansas are high?
CDC has published no statewide radon testing statistics for Kansas, so we cannot give a figure. Where CDC does publish one, the percentage describes radon tests reported to CDC, not homes.
Which EPA region is Kansas in?
Kansas is in EPA Region 7: Midwest.
Do I need to test my home in Kansas?
Yes, wherever you live in the state. Testing is the only way to know the radon level in a specific building. EPA recommends fixing a home when the radon level is 4 pCi/L or higher. EPA recommends considering a fix when the level is between 2 and 4 pCi/L.
Why does this page show coverage rather than one radon level for Kansas?
A statewide figure averages counties with very different geology and very different numbers of reported tests, so it hides more than it shows. The county report is the level at which the EPA zone, the geologic potential and the reported testing statistics are actually published, which is why the county table above links to every one of them.
What these figures mean if you own, buy, sell or rent
The zone counts on this page describe counties across Kansas. They are predictions for areas, and none of them measures your building.
- How to test a home
If you own your home
Test the lowest lived-in level; a short-term kit screens in days, a long-term kit reflects the year.
- Buying a house: radon guide
If you are buying
Ask for past results and any system's post-mitigation test, and test during the sale.
- Selling a house: radon guide
If you are selling
Testing before you list puts the timing in your hands; disclosure rules differ by state.
- Radon in rental homes
If you rent, or rent out a home
A tenant can test; a fix is the owner's to make, and duties differ by state.
How long a test has to run, under what conditions, and what EPA says a result means: the testing standard, in full.
Kansas, Products
Testing and mitigation products
Whatever the figures for Kansas show, only a test tells you about one home.
Testing
- Short-term test kitsPassive detectors exposed for a few days under closed-building conditions, then analyzed by a lab.
- Long-term test kitsDetectors exposed for more than 90 days, for a closer picture of the annual average.
- Continuous monitorsPowered devices that log radon on a repeating cycle, often used for transaction tests.
- Digital detectorsConsumer devices that display a running radon reading without a lab.
- Water radon testsKits for radon dissolved in well water, analyzed by a lab.
Mitigation
- Mitigation fansThe inline fan that keeps a soil depressurization system running, sized by the installer.
- System indicatorsU-tube manometers and fan alarms that show whether a mitigation system is still working.
- Sealing materialsCrack, joint and sump sealing used alongside a mitigation system, not instead of one.
Kansas / Next steps
What to do next
Learn
Know what radon is
What radon is, how it gets indoors, and why a county zone is not a reading for your home.
Learn about radonTest
Test the building you live in
Short-term or long-term, where the device goes, and closed-house conditions.
How to testFix
Bring a high level down
How a mitigation system works, and the retest that confirms it.
How mitigation worksFind a pro
Hire a certified professional
Measurement and mitigation professionals by state, with their certifications.
Find a professional
Informational. Follow EPA guidance. EPA says all radon tests should be taken for a minimum of 48 hours, with windows and doors closed from 12 hours before a short-term test.