American Association of Radon Scientists and Technologists, a professional association for those engaged in the research, testing, measurement and remediation of radon.

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

Provides training in the health risks posed by radon gas and the methods of radon measurement and mitigation in residential, institutional, and commercial environments.

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.

Pennsylvania company providing radon certification training, radon measurement and mitigation courses and radon instrument calibration courses. Also offers granite radiation testing services.

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

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

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

The Radiation Information Network (Idaho State U). Primordial, cosmogenic and man-made radiation sources. Radon accounts for 56% of the total effective dose to people in the US. Radioactivity in soil, building materials, and human bodies.

Educational site about radon, an invisible and odorless gas that increases your risk of developing lung cancer.

Comprehensive guide to radon in the home provided by a firm of consultants in Northern Ireland.

Dedicated to radon awareness, a novel radon localizing technique and advice on radon.

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.

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

Report from the Office of New York State Attorney General on the dangers of radon, testing, tips on reducing radon and selecting a contractor. [PDF]