Locations and reports
Radon Levels in Oklahoma
What this means for you
- Your area: None of Oklahoma's 77 classified counties is in EPA 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 Oklahoma'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 Oklahoma, EPA's Map of Radon Zones places 0 of its 77 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
77 of 77 counties classified
EPA classifies counties, not states. Of the 77 counties in Oklahoma with a zone, 9 are in Zone 2 and 68 in Zone 3.
- Zone 2: Moderate predicted potential2 to 4 pCi/L9 of 77 counties · 11.7%
- Zone 3: Lower predicted potentialless than 2 pCi/L68 of 77 counties · 88.3%
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.
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 Oklahoma's radon test figures by county: 55 of its 77 counties have one. Each county's share is in the county list.
Oklahoma, In figures
Oklahoma in figures
What the published data says about Oklahoma, in words. A zone and a share of tests describe an area, never the level in any one home.
Predicted
PredictedEPA places 9 of Oklahoma's 77 counties in Zone 2 and 68 in Zone 3.
No Oklahoma county is in Zone 1.
Compared
Calculated by Radon4110% of Oklahoma's counties with a zone on file are in Zone 1, a smaller 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 Oklahoma on file here.
55 of the 77 counties have a published county figure; the most tests in each one's latest year were reported for Tulsa County (168 in 2017), Oklahoma County (70 in 2017) and Cherokee County (32 in 2017).
Oklahoma's radon program and its page are under Local resources.
Oklahoma, Counties
Oklahoma counties by EPA zone
PredictedAll 77 counties, by the zone EPA predicts for each. Every county has its own report.
Zone 2: moderate predicted potential9
- Adair County50.0% of reported tests at or above 4 pCi/L, 2017
- Beaver County0.0% of reported tests at or above 4 pCi/L, 2015
- Cherokee County31.4% of reported tests at or above 4 pCi/L, 2017
- Cimarron County66.7% of reported tests at or above 4 pCi/L, 2017
- Delaware County41.9% of reported tests at or above 4 pCi/L, 2017
- Ellis CountyReported testing not yet available
- Mayes County33.3% of reported tests at or above 4 pCi/L, 2017
- Sequoyah County0.0% of reported tests at or above 4 pCi/L, 2017
- Texas County66.7% of reported tests at or above 4 pCi/L, 2017
Zone 3: lower predicted potential68
- Alfalfa County100.0% of reported tests at or above 4 pCi/L, 2017
- Atoka CountyReported testing not yet available
- Beckham County0.0% of reported tests at or above 4 pCi/L, 2017
- Blaine CountyReported testing not yet available
- Bryan County0.0% of reported tests at or above 4 pCi/L, 2017
- Caddo CountyReported testing not yet available
- Canadian County19.0% of reported tests at or above 4 pCi/L, 2017
- Carter County14.3% of reported tests at or above 4 pCi/L, 2017
- Choctaw County100.0% of reported tests at or above 4 pCi/L, 2017
- Cleveland County0.0% of reported tests at or above 4 pCi/L, 2017
- Coal CountyReported testing not yet available
- Comanche County10.0% of reported tests at or above 4 pCi/L, 2017
- Cotton CountyReported testing not yet available
- Craig County0.0% of reported tests at or above 4 pCi/L, 2017
- Creek County0.0% of reported tests at or above 4 pCi/L, 2017
- Custer County0.0% of reported tests at or above 4 pCi/L, 2017
- Dewey County33.3% of reported tests at or above 4 pCi/L, 2017
- Garfield County40.0% of reported tests at or above 4 pCi/L, 2017
- Garvin County0.0% of reported tests at or above 4 pCi/L, 2017
- Grady County0.0% of reported tests at or above 4 pCi/L, 2017
- Grant County25.0% of reported tests at or above 4 pCi/L, 2017
- Greer CountyReported testing not yet available
- Harmon CountyReported testing not yet available
- Harper CountyReported testing not yet available
- Haskell County0.0% of reported tests at or above 4 pCi/L, 2017
- Hughes County0.0% of reported tests at or above 4 pCi/L, 2017
- Jackson County0.0% of reported tests at or above 4 pCi/L, 2017
- Jefferson County0.0% of reported tests at or above 4 pCi/L, 2017
- Johnston CountyReported testing not yet available
- Kay County28.0% of reported tests at or above 4 pCi/L, 2017
- Kingfisher County0.0% of reported tests at or above 4 pCi/L, 2017
- Kiowa CountyReported testing not yet available
- Latimer CountyReported testing not yet available
- Le Flore County0.0% of reported tests at or above 4 pCi/L, 2017
- Lincoln County0.0% of reported tests at or above 4 pCi/L, 2017
- Logan County0.0% of reported tests at or above 4 pCi/L, 2017
- Love CountyReported testing not yet available
- Major County0.0% of reported tests at or above 4 pCi/L, 2017
- Marshall CountyReported testing not yet available
- McClain County40.0% of reported tests at or above 4 pCi/L, 2017
- McCurtain County0.0% of reported tests at or above 4 pCi/L, 2017
- McIntosh County0.0% of reported tests at or above 4 pCi/L, 2017
- Murray CountyReported testing not yet available
- Muskogee County5.9% of reported tests at or above 4 pCi/L, 2017
- Noble County0.0% of reported tests at or above 4 pCi/L, 2016
- Nowata County0.0% of reported tests at or above 4 pCi/L, 2016
- Okfuskee CountyReported testing not yet available
- Oklahoma County8.4% of reported tests at or above 4 pCi/L, 2017
- Okmulgee County0.0% of reported tests at or above 4 pCi/L, 2017
- Osage County0.0% of reported tests at or above 4 pCi/L, 2017
- Ottawa County0.0% of reported tests at or above 4 pCi/L, 2017
- Pawnee CountyReported testing not yet available
- Payne County6.7% of reported tests at or above 4 pCi/L, 2017
- Pittsburg CountyReported testing not yet available
- Pontotoc County0.0% of reported tests at or above 4 pCi/L, 2017
- Pottawatomie County11.1% of reported tests at or above 4 pCi/L, 2017
- Pushmataha CountyReported testing not yet available
- Roger Mills County0.0% of reported tests at or above 4 pCi/L, 2017
- Rogers County14.8% of reported tests at or above 4 pCi/L, 2017
- Seminole CountyReported testing not yet available
- Stephens County0.0% of reported tests at or above 4 pCi/L, 2017
- Tillman CountyReported testing not yet available
- Tulsa County8.2% of reported tests at or above 4 pCi/L, 2017
- Wagoner County0.0% of reported tests at or above 4 pCi/L, 2017
- Washington County4.3% of reported tests at or above 4 pCi/L, 2017
- Washita County0.0% of reported tests at or above 4 pCi/L, 2017
- Woods County0.0% of reported tests at or above 4 pCi/L, 2017
- Woodward CountyReported testing not yet available
Oklahoma, Local resources
Local resources in Oklahoma
Who to ask in Oklahoma: the state's radon program, test kits and professionals.
Oklahoma's radon program
Department of Environmental Quality
Oklahoma’s radon program answers questions about testing, mitigation and the rules where you live.
Visit the program's page(opens in a new tab)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 Oklahoma yet. The state program can point you to registered testers and mitigators.
See the Oklahoma directoryOklahoma, Questions
Questions about radon in Oklahoma
Common questions8 questions, answered from the figures above
Is radon a problem in Oklahoma?
EPA's Map of Radon Zones places 0 of the 77 Oklahoma counties it classifies in Zone 1, the highest predicted potential, 9 in Zone 2 and 68 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 Oklahoma?
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 Oklahoma 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 stateOklahoma radon program
Who does radon mitigation in Oklahoma?
Radon411 has no certified mitigators listed for Oklahoma 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 Oklahoma
Which Oklahoma counties have the highest radon?
77 of Oklahoma's 77 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 Oklahoma are high?
CDC has published no statewide radon testing statistics for Oklahoma, 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 Oklahoma in?
Oklahoma is in EPA Region 6: South Central.
Do I need to test my home in Oklahoma?
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 Oklahoma?
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 Oklahoma. 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.
Oklahoma, Products
Testing and mitigation products
Whatever the figures for Oklahoma 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.
Oklahoma / 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.