James R. Tippens is no longer certified as a Radon Measurement Provider by the National Environmental Health Association, National Radon Proficiency Program. But he has not forgotten his training. (NEHA-NRPP)
Radon is a radioactive cancer-causing gas that is produced by the natural breakdown of Uranium in rocks and soil. Radon typically moves up through the ground to the air above. It can enter your home through tiny cracks and holes in the foundation, or through well water. Your home can trap radon inside.
Any home can have a radon problem. The EPA estimates that one in fifteen homes in the United States has an elevated radon level (4pCi/L or more).
Radon is only detectable by special devices designed to measure its presence. I use a Continuous Radon Monitor, which is a small battery powered unit that measures Radon levels continuously over the course of at least 48 hours. At the end of the test, the unit prints all the data, so the results are available immediately at the end of the test.
Very helpful information about Radon and Radon Measurement is available from the EPA at the following links:
Also, see the NC State Radon Office Website