What are radon levels in Franklin county, Ohio?

 
 

Central Ohio has high radon potential according to the EPA. Average radon levels recorded and submitted to the Ohio Department of Health range from 2 to 4 Pci/L (picoCuries per liter), shown in light blue in the graphic below, to ZIP Codes with averages over 10 Pci/L, shown in red in below.

Although there is no safe level of radon exposure, the EPA Action Level for indoor radon is 4.0 Pci/L. The first step to understanding the radon level inside your own home is to test–this is something you can include with your home inspections when buying a home, or anytime for your current home. Even if you already have a radon mitigation system, the EPA recommends that you test your home every two years–many changes to your home can change the amount of radon trapped inside the living area, including new windows, siding, or roof.

Map of Franklin county, showing average radon level by ZIP Code

ZIP Code 43137 in Lockbourne, Ohio, has the highest recorded indoor radon average in Franklin county with over 10 Pci/L. The highest radon level recorded in Franklin county was 939 Pci/L in Columbus ZIP Code 43214, which is over 234 times the EPA action level.

Radioactive radon gas exposure is the leading cause of lung cancer for non-smokers. Any house can have a radon problem–single story, multi-family, with or without a basement, with or without a crawlspace–the only way to know is to get a test.

Average indoor radon levels for ZIP Codes in Franklin county, Ohio

Zip CodeCountyCityNumber of TestsMaximumGeometric Mean
43002FranklinAmlin1140.17.82
43004FranklinBlacklick2773126.54.58
43016FranklinDublin47562740.1
43017FranklinDublin7482193.70.1
43026FranklinHilliard66071510.1
43054FranklinNew Albany40181470.1
43068FranklinReynoldsburg3649180.54.12
43069FranklinReynoldsburg22.31.79
43081FranklinWesterville6352114.80.1
43085FranklinColumbus4854369.90.1
43086FranklinWesterville1332.73.04
43109FranklinBrice520.58.92
43119FranklinGalloway208966.33.75
43123FranklinGrove City36864794.92
43125FranklinGroveport75794.86.14
43126FranklinHarrisburg818.58.77
43137FranklinLockbourne57100.59.61
43199FranklinGroveport12.82.8
43201FranklinColumbus162373.63.45
43202FranklinColumbus1353152.94.24
43203FranklinColumbus27559.62.29
43204FranklinColumbus1382114.64.34
43205FranklinColumbus44069.64.76
43206FranklinColumbus20179044.05
43207FranklinColumbus1038125.34.68
43209FranklinColumbus3411115.20.1
43210FranklinColumbus7230.72.61
43211FranklinColumbus49346.92.16
43212FranklinColumbus1955178.23.8
43213FranklinColumbus4717142.42.4
43214FranklinColumbus39619395.85
43215FranklinColumbus873174.83.09
43216FranklinColumbus2623218.48
43217FranklinColumbus87049.43.01
43218FranklinColumbus1010.12.99
43219FranklinColumbus611112.24.2
43220FranklinColumbus4608143.44.26
43221FranklinColumbus5705165.90.1
43222FranklinColumbus6234.54.68
43223FranklinColumbus584413.08
43224FranklinColumbus1452333.93.41
43226FranklinColumbus1314.74.62
43227FranklinColumbus56689.90.1
43228FranklinColumbus362589.52.89
43229FranklinColumbus2947102.80.1
43230FranklinColumbus4940417.70.1
43231FranklinColumbus97389.84.77
43232FranklinColumbus1577142.85.38
43234FranklinColumbus1722.57.06
43235FranklinColumbus47147200.1
43236FranklinColumbus618.86.9
43251FranklinColumbus122.522.5
43266FranklinColumbus99351.23
43268FranklinColumbus27.27.2
43270FranklinColumbus13.73.7
43271FranklinColumbus15.25.2
43279FranklinColumbus110.410.4
43291FranklinColumbus210.27.82

Data shown on this page is published by the Ohio Department of Health, as of August 2019.

Skyline of Columbus, Ohio at night. Columbus is the capital of Ohio, located in central Franklin County.

Skyline of Columbus, Ohio at night. Columbus is the capital of Ohio, located in central Franklin County.

 
 

Any home can have high radon, the only way to know is to test.

Include a radon test with your home inspection for any house you consider buying.

Schedule a Radon Test Now for $150 What is Radon Gas?
 
 
 

Radon Information

Skyline of Columbus, Ohio at night. Columbus is the capital of Ohio, located in central Franklin County.

What are radon levels in Franklin county, Ohio?

Central Ohio has high radon potential according to the EPA. Average radon levels recorded and submitted to the Ohio Department of Health range from 2 to 4 Pci/L (picoCuries per liter), shown in light blue in the graphic below, to ZIP Codes with averages over 10 Pci/L, shown in red in below.

Although there is no safe level of radon exposure, the EPA Action Level for indoor radon is 4.0 Pci/L. The first step to understanding the radon level inside your own home is to test–this is something you can include with your home inspections when buying a home, or anytime for your current home. Even if you already have a radon mitigation system, the EPA recommends that you test your home every two years–many changes to your home can change the amount of radon trapped inside the living area, including new windows, siding, or roof.

Learn More

Uranium emitting alpha particles in a cloud chamber

What is radon gas?


Radon is an odorless, colorless, tasteless, radioactive gas. Radon comes from the decay of radioactive uranium that can be found in small amounts in rocks and soil throughout nature. In areas with disturbed earth, and loose fill, like when a home is built, radon escapes from the soil.

Radon gas exposure is the number one cause of cancer for non-smokers, even greater than second-hand smoke. Most people are exposed to radon gas inside their own homes, and this is their greatest exposure to natural ionizing radiation.

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All radon inspectors who enter your home wear face coverings and use hand sanitizer.

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Radon Done radon test in progress door hanger. Homes undergoing radon testing must have all windows and doors closed for the duration of the test

Radon gas in Ohio

Central Ohio has relatively high natural concentrations of uranium from glacial deposits and shale, which during radioactive decay, produces radium and radon.

The EPA’s current radon action level is four picocuries of radon per liter of air (4 pCi/L). Most counties in central Ohio have high potential for radon, with predicted average indoor greater than the EPA action level. According to one study cited by Ohio Department of Natural Resources Department of Geological Survey, 38% of Ohio’s 88 counties had average indoor radon levels above 4.0 pCi/L, but Licking County’s average was above 8.0 pCi/L. Seven Ohio counties—Carroll, Fairfield, Franklin, Harrison, Knox, Pickaway, and Ross—had average indoor Radon concentrations between 6 and 8 pCi/L.

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