Most radon-related deaths in the US are due to radon gas accumulated in houses from seepage through cracks in the foundation, 30 to 1,800 deaths per year are attributed to radon from household water. High levels of dissolved radon are found in the groundwater in some areas flowing through granite or granitic sand and gravel formations. If you live in an area with high radon in groundwater it can get into your private well. Washing dishes, showering, and laundering can disturb the water releasing radon gas into the air you breathe.
How do I remove radon from my drinking water?
Radon can be removed from water by using one of these two methods:
• Aeration treatment – spraying water or mixing it with air and then venting the air from the water before use, or
• GAC treatment – filtering water through granular activated carbon. Radon attaches to the carbon and leaves the water free of radon. Disposing of the carbon may require special handling if it is used at a high radon level or if it has been used for a long time.
In either treatment, it is important to treat the water where it enters your home (point-of-entry device) so that all the water will be treated. Point-of-use devices such as those installed on a tap or under the sink will only treat a small portion of your water and are not effective in reducing radon in your water. It is important to maintain home water treatment units properly because failure to do so can lead to other water contamination problems. Some homeowners use a service contract from the installer to provide carbon replacement and general system maintenance. Remember to have your well water tested regularly at least once a year after installing a treatment system to make sure the problem is controlled. For more information pertaining to radon in water visit www.epa.gov

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