Test & Get Rid of Radon

Because radon in indoor air is the larger health concern, the EPA recommends that you first test the air in your home for radon before testing for radon in your drinking water. The EPA and the U.S. Surgeon General recommend testing all homes for radon in indoor air (and apartments located below the third floor). The EPA recommends that you take action to reduce your home's indoor radon levels if your radon test result is 4 pCi/L or higher.

If you have tested the air in your home and found a radon problem, you may also want to find out whether your water is a concern:
  • If you get water from a public water system - Find out whether your water system gets its water from a surface (river, lake, or reservoir) or a ground water (underground) source.
  • If the water comes from a surface water source, most radon that may be in the water will be released to the air before it makes its way to your tap.
  • If the water comes from a ground water source, call your water system and ask if they've tested the water for radon.
  • If you have a private well - The EPA recommends testing your drinking water for radon. Call the Safe Drinking Water Hotline at 800-426-4791 which can provide phone numbers for your State laboratory certification office or call the Radon Hotline at 800-SOS-RADON which can provide phone numbers for your State radon office. Your State laboratory certification office or State radon office can direct you to laboratories which may be able to test your drinking water for radon.
If testing your private well shows that you have high levels of radon in your drinking water and you are concerned about it, there are some things you can do to improve the water. The most effective treatment you can apply is to remove radon from the water right before it enters your home. This is called point-of-entry treatment.

There are two types of point-of-entry devices that remove radon from water:
  • Granular activated carbon (GAC) filters (which use activated carbon to remove the radon).
  • Aeration devices (which bubble air through the water and carry radon gas out into the atmosphere through an exhaust fan).
GAC filters tend to cost less than aeration devices, however, radioactivity collects on the filter, which may cause a handling hazard and require special disposal methods for the filter.

For more information on aerators and GAC filters, you should contact two independent, non-profit organizations, NSF International at 877-867-3435 and the Water Quality Association at 630-505-0160.