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Radon Testing

Starting January 26, 2026, the Marshall County Health Department will begin offering free radon testing to residents. You can obtain a kit at the Health Department during our regular business hours. For more information, scroll down to the Free Radon Testing section on this page, or call us at 304-845-7840 ext. 2417.

About Radon

Radon is a radioactive gas that can build up inside your home, and it is the second leading cause of lung cancer deaths after cigarette smoking. All outdoor and indoor air has some radon in it. Radon can build up in the air in any home or building whether it has a basement, is sealed or drafty, or is new or old. It is a risk anywhere in the country, but West Virginia is known to have higher than average levels. There is no known safe level of radon, and you should always aim to have the lowest level.

Test your home to find out if you should install a radon reduction system to protect your household from lung cancer. The U.S. Environmental Protection Agency recommends installing a radon reduction system for levels 4 pCi/L or higher. Contact your state radon office to find a radon reduction professional.

How to Test Your Home for Radon

The good news is that testing your home for radon is easy. You can do it yourself or hire someone to do it for you.

  • Get a radon test kit. Contact the Health Department to obtain a free do-it-yourself test. You also have the option of hiring a radon tester or purchase a radon test kit from a hardware store, or calling 1-800-SOS-Radon.
  • Set up the testing device to check the air for radon. Depending on the type of test, it may take just a few days or many months to finish the test. Kits provided by the Health Department take 48 hours to complete.
  • Send your test device to lab and wait for the results. If you're using a Health-Deparmtent issued test, simply return your test to our Environmental team and we will send it for you. If you purchased your own test, send the device to a lab and wait for the results.

If your test results show a radon level of 4 picocuries per liter (pCi/L) or higher, test your home again. If the second test is also high, you need to fix the problem.

Free Radon Testing

To obtain a free radon test kit, stop by the Health Department or call (304) 845-7840 ext 2417. Take the test home, and follow the instructions provided by the Health Department (please ignore the instruction insert provided in the test kit).

In order for us to process and deliver your kit to the lab within the allotted time, you will have to return your kit to the Health Department within 12 hours of completing the test. Please consider this when choosing a day to set up your kit, as we will not be able to process kits received after 12 pm on Fridays.