The charcoal is analyzed at the laboratory to determine a radon level. The second type of test is an alpha-track detector. It consists of a plastic film enclosed in a container with a filtered, covered opening through which radon particles enter and leave marks which can be counted under a microscope by a laboratory. The long-term test gives the user a seasonal average level of radon. There is no such thing as radon.
Scientists aren t sure radon is really a problem.
Low level exposure to radon is harmless. Radon testing is difficult, time-consuming and expensive. Radon test kits are not reliable and are difficult to find. Some of all homes with radon problems can t be fixed. Radon only affects certain types of homes.