EPA Map of Maryland Radon Zones
Radon is a known human carcinogen. Based on the strongest data available for predicting risks to human populations (data from human epidemiologic studies), the carcinogenicity of radon has been established by the scientific community, including the World Health Organization, the National Academy of Sciences' Biological Effects of Ionizing Radiation Committee, the International Commission on Radiological Protection and the National Council on Radiation Protection and Measurement.
In addition, radon has been identified as a serious public health problem by a number of U.S. health organizations such as the Center for Disease Control. The American Lung Association, the American Medical Association and the American Public Health Association. In 1988, the U.S. Surgeon General issued the following national radon health advisory to the public:
Indoor radon gas is a national health problem. Radon causes thousands of deaths each year. Millions of homes have elevated levels. Most homes should be tested for radon. When elevated levels are confirmed, the problem should be corrected.
U.S. Sergeon General