January Is National Radon Action Month

What is Radon and How Does Radon Get Into a Home?
Radon is a radioactive gas. It comes from the natural decay of uranium that is found in nearly all soils. It typically moves up through the ground to the air above and into your home through cracks and other holes in the foundation. Your home traps radon inside, where it can build up.

Radon has been found in all types of homes, including:

Radon House


  • Old homes
  • Well sealed homes
  • Drafty homes
  • Homes with basements
  • Homes built on slabs
  • Homes with crawl spaces

Any home may have a radon problem. The only way to know is to test.
Click on the links below for more information.

USGS Report "Geology of Radon"
Read the USGS Report discussing the geology of radon (PDF 8.9MB)

California Radon Program

Radon Program Contact Information

Information courtesy of California Department of Public Health (CDPH)
United States Environmental Protection Agency (EPA)


- Sunil Sethi


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