If it is determined that radon is present in a private well, installing either a point-of-use or point-of-entry solution may be necessary.[1] Point-of-use treatments are installed at the tap, and are only helpful in removing radon from drinking water. To address the more common problem of breathing in radon released from water used during showers and other household activities, a point-of-entry solution may be more reliable.[108] Point-of-entry systems usually involve a granular activated carbon filter, or an aeration system; both methods can help to remove radon before it enters the home's water distribution system.[108] Aeration systems and granular activation carbon filters both have advantages and disadvantages, so it is recommended to contact state radon departments or a water treatment professional for specific recommendations.[108]