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  1. 2)The larger health risk is radon in the air inhaled into your lungs. About 160,000 people—most of them smokers—die from lung cancer each year. Approximately 19,000 of those deaths are attributable to a combination of smoking and indoor radon, because radon greatly enhances the cancer-causing effect of smoking.

  2. 3)The radon dissolved in water escapes into the air when showering or washing dishes, especially if the sink faucet has an aerator spout. But the conversion factor to the more-deadly airborne radon is low. It is estimated a 10,000 pCi/L level of radon in water raises the radon of the indoor air by only 1 pCi/L.

   To complicate things further, the level of radon in water does not directly correlate to the level in air. According to the National Academy of Sciences study, data indicates that the Northern United States and some areas in the South have higher than average indoor air radon, while New England states and some parts of the Southwest have higher levels of radon in water. The Appalachian and Rocky Mountain states, along with some parts of the Great Plains, have higher than average radon in both water and indoor air.

    Although radon testing of indoor air has become a standard part of due diligence for homebuyers in a real estate transaction, water radon testing is not that common in Florida. Also, the equipment that home inspectors use to test radon levels in the air is not suitable for water testing.

    If you want to check your well water for radon, we suggest using a test kit from Pro-Lab, of Fort Lauderdale, Florida. You can purchase one at any Home Depot. If not in stock at your local store, they will order one for you. It costs under $8, and you send your water sample to the lab, along with a $40 lab fee, and get the results back in about one week. Pro-Lab uses the “liquid scintillation” method for evaluating the water, which is a technique approved by the EPA for water radon testing.

While we hope you find this series of articles about home inspection helpful, they should not be considered an alternative to an actual home inspection by a local inspector. Also, construction standards vary in different parts of the country and it is possible that important issues related to your area may not be covered here.
© McGarry and Madsen Inspection

More Blog Posts on Safety Subjects:

  1. What is radon? Should I be concerned about it in Gainesville?

  2. This house has been empty and closed-up for months. Will the radon test come back sky-high?

  3. Can a homebuyer do their own radon test for a real estate transaction with a self-test kit?

  4. Will opening the windows reduce the radon level in a house?

  5. Do radon mitigation systems require maintenance?

  6. How was it determined that between 15,000 and 22,000 lung cancer deaths each year are caused by radon?

  7. What are a homebuyer’s options when the radon test comes back high (4.0 pico-curies/liter or more)?

  8. How can I tell if a house has a radon mitigation system?

  9. How long does it take to get the results of a radon test?

  10. Should homeowners get a pre-listing radon test before selling their home?

  11. Can a mobile/manufactured home have a high radon problem?

  12. What is radon? Should I be concerned about it?

  13. Is the electric panel big enough for this house?

  14. Why does that wall plug have push-buttons in the middle?

  15. What do you look for when inspecting stairs?

  16. How do I remove cigarette odor in a house?

  17. What do you check when you inspect an electric garage door?

  18. Do you check the wall plugs?

  19. How can not testing for radon be an expensive mistake for homebuyers?

  20. What are the warning signs of a dangerous attic pull-down ladder?

  21. What is the average radon level of indoor and outdoor air in America?

  22. How long does it take to get the results of a radon test?

  23. Can the seller tamper with a homebuyer’s radon test to change the results?

  24. Can stormy weather change the radon in a house?

  25. Do older houses have higher radon levels than new houses?

  26. What is the operating cost of a radon mitigation system?

  27. Should I buy a house with a radon mitigation system?

  28. Is radon mitigation possible for a condominium?

Radon Testing


in Metro Gainesville

48-hour test, results same
day of test completion



when done at same
time as  home inspection