US EPA information resources and links about this gas, its health effects, and its control.

Provides certification and continuing education classes that meet National Radon Proficiency Program. Located in Colorado Springs, CO.

Uses information about location of home, and house construction, to suggest whether or not to test for radon.

Short primer on U238 decay through radon to stable lead, radioactive half times of elements. Chart of the decay chain with half times and alpha or beta radiation.

A chart listing all of the decay products of radon gas in their order of appearance. Atomic mass, atomic numbers and the energy in MeV of the released alpha radiation.

Informative article about how radon forms and why it is so dangerous. Comparison of radon test devices. Useful links.

U.S. Geological Survey site on radon in earth, air and water. Site resources include educational information on radon, and multiple maps on the geologic and geographic occurrence of radon in the United States.

The latest and most substantial study ever on the link between radon and lung cancer (May, 2000) proves that residential radon causes cancer even at the low levels in homes. At the EPA's 4 pCi/L action limit, the lung cancer risk to women increases by 50%.

Informative primer on radon, its progeny, measurement and risks. Extensive information on radioactivity and radiation, exposure and risks.

A detailed paper on uranium, its radioactive products, mining, and radiation risks to people issued by the Canadian Coalition for Nuclear Responsibility (1992). The health risks even at the low radon levels in homes.