What is Radon?

Radon is a colorless, odorless radioactive gas that forms when naturally occurring uranium decays. Radon gas is commonly found in rocks and soil, and it enters homes through cracks and other holes in the foundation.  Prolonged exposure to radon levels above 4 picocuries per liter of air significantly increases the risk of lung cancer, even for nonsmokers.  The USEPA considers radon the second leading cause of lung cancer in the United States overall, and it is the leading cause among non-smokers.

The only way to find out if you have elevated radon levels in your home is to conduct a simple test.

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Request a Free Short Term Radon Test Kit

Franklin County Public Health has a limited supply of short term radon test kits available to residents of Franklin County and surrounding counties. Click here to order your free short term radon test kit.

If you have questions or concerns please contact Mike Lopinsky at (614) 525-3859 or at mjlopins@franklincountyohio.gov.

The results are used in aggregate format by the University of Toledo, who continually tracks radon levels in the State of Ohio. The information collected on the questionnaire or your results are not shared with any outside parties.

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Radon FAQs

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Is there an “acceptable” level of radon?
USEPA has established 4 picocuries / liter of air as the “Action Level” for radon in a home.
How does radon get into my home?
Radon is a radioactive gas that is naturally occurring in the soil and bedrock. It enters the home (usually the basement or slab) through cracks, holes, and other openings.
What do I do if my test results exceed 4.0 picocuries / liter?
Currently, no law requires a homeowner to mitigate the radon. However, if you sell your home in the future, you must be disclosed that a radon test was conducted, and what level of radon was detected. If you choose to have radon mitigation done, visit the State of Ohio's website and click on "Find a Licensed Radon Professional in Your Area" on the left side of the page.
What are some other radon resources?

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