If follow-up tests show that a substantial portion of the radon in your home comes from your household water supply, consider taking some action to lower radon levels in your water supply. Treatment Good ventilation of bathroom, laundry, and kitchen areas may be enough to prevent the buildup of airborne radon coming from water. If this is not effective, consider a granular activated carbon filtration system or an aeration system. Install GAC systems only outside of your home. Aeration systems are also effective and do not accumulate radioactivity.
Aeration systems mix the water with air in an outside-vented chamber.
After aeration, the water is piped into the house free of radon. Aeration systems require periodic cleaning to remove particulates that come from minerals in the water. Everyone should test for airborne radon levels in their homes. The test is inexpensive and you can do it yourself. Contact the extension center in your county or the North Carolina Division of Radiation Protection in Raleigh for more information on radon testing and removal systems.