Radon is a colorless, odorless gas that can be found in the air and in water. When breathed in, it can cause lung cancer. Drinking water containing radon may also cause cancer, which is why you should consider contacting a water testing lab if you have concerns.
Not everyone needs to worry about the presence of radon in drinking water. Radon is only found in water supplies that come from the ground, so you should only be concerned if you have well water. Since having your well water tested annually is recommended, you really only need to talk to your lab about including radon testing in your annual water inspection.
Currently, the EPA only regulates drinking water from community wells, with regards to radon gas. If your water supply comes from a public well, it will already go through testing for the presence of radon. Homeowners with private wells are responsible for their own testing, and there are no EPA regulations on the amount of acceptable radon in your water.
If radon is found in your water, there are several things you can do to protect your drinking supply. Your water testing lab will help you determine which contaminants are present in your water, and can help you come up with viable solutions for improving the quality of your water.
Remember to have your private well water tested at least once per year by a reputable water testing lab, and be sure to ask the lab to test for the presence of radon in your water supply.