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Radon
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Radon Frequently Asked Questions

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Search Frequent Questions for immediate answers to the most common questions or send a question to our customer care team.

Radon

  • What is Radon?
  • Where does radon come from?
  • How does radon get into your home?
  • What is the radon hotline
  • What is the average level of radon found in homes in the U.S.?
  • What is National Radon Action Month? When is Radon Action Week?
  • What is EPA's Action Level for Radon and What Does it Mean?
  • Describe the radon epidemiological studies?
  • What is the debate on radon?
  • What did the National Academy of Sciences have to say about radon?
  • Does the 2009 World Health Organization's recommendation of a lower radon action level affect EPA's radon action level of 4 pCi/L?
  • What about the NPR Story on Radon?
  • Explain Working Levels (WL) and Picocuries Per Liter of Air (pCi/L).

Radon and Health

  • Are we sure that radon is a health risk?
  • How do we know radon is a carcinogen?
  • What are the health effects from exposure to radon?

Radon Testing

  • Are radon measurements accurate and reliable?
  • How do I get a radon test kit?  Are they free?
  • How can you find a qualified radon service provider in your area?
  • How often should I test/retest my home for radon?
  • Should I test the soil for radon before building?

Radon and Granite

  • Where I work we manufacture products from granite and other natural materials. Should I be concerned about radiation in my workplace?
  • What about radon and radioactivity in granite countertops?

Radon Mitigation

  • How much can a radon mitigation system cost?
  • How do I know if my radon mitigation system is working properly?
  • Why must radon be vented into the air above my home's roof?
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Contact Us to ask a question, provide feedback, or report a problem.
Last updated on November 10, 2022
United States Environmental Protection Agency

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