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

Comprehensive article on radon. Radon progeny, the decay chain and radiation. Lung cancer risks. Occupational and residential limits. Geographic radon potential. Waterborne radon. (June 1999)

The National Academy of Sciences comprehensive report (1998) on the health efects of radon in homes. A detailed risk model for the US population. Explains how radon causes lung cancer and estimates that in the U.S. it causes 15,400 - 21,800 lung cancer deaths each year.

Complete publications list, descriptions and links. Informative EPA Guides for citizens, consumers, home buyers and sellers, physicians, and tenants. Radon prevention in construction, schools. Measurement protocols. Links to regional Radon Offices.

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

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

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

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%.

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.