An official website of the United States government Here’s how you know Menu Search Search CONTACT US Radon Radon is the #1 cause of lung cancer among non-smokers Learn the Facts! #TestFixSaveALife 1234 Radon is a naturally occurring radioactive gas that can cause lung cancer. You can’t see or smell radon. Testing is the only way to know your level of exposure. Radon can have a big impact on your Indoor Air Quality. Which Radon Zone do you live in? Find Radon Zone and Supplemental Radon Information near you. Individuals and Families Health Risk of Radon Citizen's Guide to Radon Find a Radon Test Kit or Measurement and Mitigation Professional Radon in Drinking Water Radon Hotlines and Resources Radon Publications (En Español) Radon Media Resources for Partners and Stakeholders Frequent Questions about Radon En Español - Acerca del radón Home Buyers and Sellers Radon Protection: Buying a Home Radon Protection: Building a Home Radon-Resistant New Construction Radon and Real Estate Resources Home Buyer's/Seller's Guide to Radon Consumer's Guide to Radon Reduction: How to Fix your Home Who is Qualified to Test or Fix My Home? Radon Guide for Tenants Builders and Contractors Radon-Resistant Construction Basics and Techniques Resources for Builders and Contractors Radon Standards of Practice Radon Action Plans The National Radon Action Plan (2015-2020) Federal Radon Action Plan (2010-2016) Final FRAP Scorecard Radon Programs & Initiatives State Indoor Radon Grants Program and Resources Radon in Schools Proposed Criteria for Radon Credentialing Organizations Email Updates To receive information on healthy indoor air, enter your email address. You can then choose your topics of interest, and manage your subscription. Subscription Type Email SMS/Text Message Email Address Contact Us to ask a question, provide feedback, or report a problem. Discover. Accessibility Budget & Performance Contracting EPA www Web Snapshot Grants No FEAR Act Data Plain Writing Privacy Privacy and Security Notice Connect. Data.gov Inspector General Jobs Newsroom Open Government Regulations.gov Subscribe USA.gov White House Ask. Contact EPA EPA Disclaimers Hotlines FOIA Requests Frequent Questions Follow. LAST UPDATED ON NOVEMBER 29, 2021