Over a person's lifetime, particulate radon progeny can enter the lungs, attach themselves, and may eventually lead to lung cancer. Radon is believed to cause between 15,000 and 21,000 U.S. deaths from lung cancer annually. Radon has been identified in every state. Smokers exposed to radon substantially increase their risk of lung cancer in comparison to exposed non-smokers. It is possible for one home to have elevated levels of radon while a neighboring home does not.
Testing is the only way to determine levels of radon in a structure.
Short-term tests remain in the home for two to 90 days, depending on the device. Long-term tests remain in the home for more than 90 days. Alpha track and electret detectors are commonly used for this type of testing. Radon levels can be lowered through a variety of repairs, from sealing cracks in floors and walls to changing the flow of air into the building. Sub-slab depressurization uses pipes and fans to remove radon gas from beneath the concrete floor and foundation before it can enter the building.