In some counties more than 40 percent of the homes could have a problem. While a fairly high percentage of the population claims awareness of radon, only about 10 percent of Michigan homes have actually been tested, Harding said. Radon is generated by the radioactive decay of uranium and radium which are found in virtually any type of soil and rock. It enters homes through openings in the foundation floor or walls, and indoor concentrations tend to be higher than outdoor radon levels. The DEQ is working with local health departments to distribute radon information and to make test kits more accessible to the public.
Kits are available in at least one local health department office in every county.
They also can be purchased in many hardware stores and other retail outlets statewide. Staff also are available to provide local health department numbers, help interpret test results, provide callers with lists of qualified testers and radon reduction contractors, and offer other basic consultative services.