If you suspect a problem, call your public water supplier. As you shower or use water for other household uses, you can breathe in radon gas. Research suggests that swallowing water with high radon levels can pose risks, too, but these risks are believed to be much lower than those from breathing air containing radon. Radon problems in water can be readily fixed. The most effective treatment is to remove radon from the water before it enters the home.
Testing can take as little as two days.
Some of the more elaborate or long-term tests can take more than 90 days. These testing devices are small, unobtrusive, and easy to use. The kit is placed in the lowest level of your house for 2-90 days, depending on the particular test. Once it is completed, the test is sent to a lab which returns the analysis results by mail. In some states, radon testing is required in order to sell your home or business.