Radon is the second leading cause of lung cancer in the United States after smoking. It is responsible for approximately 500 lung cancer deaths annually in Colorado.  

Below are Colorado-specific radon resources for school and daycare administrators, real estate agents and healthcare professionals.  

School’s out and kids are spending more time at home — make sure the air they're breathing is safe!

Radon is a colorless, odorless gas that’s common in Colorado and the second leading cause of lung cancer.

Testing your home is simple and can help you create a healthier, safer space for your family this summer and beyond.

Learn more and find free resources at Lung.org/radon — and share this reminder to help keep Colorado families safe!

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Learn about radon gas, the second leading cause of lung cancer--the number one cancer killer of both men and women. The American Lung Association takes viewers on an easy but complete step-by-step course to help you find and fix radon problems in your home and protect the health of those you love.

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Radon and Lung Health

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Half of Colorado homes harbor an unseen villain – Radon. You can't see, smell or taste it, but it could be lurking. Being the 2nd biggest cause of lung cancer, it's vital to get checked.

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There could be a silent danger in your home: radon—a naturally occurring radioactive gas that you can’t see, smell, or taste.

Radon is the second leading cause of lung cancer and is responsible for about 21,000 lung cancer deaths each year in the U.S.

Radon gas forms underground from the breakdown of uranium in rock and soil. It can seep into your home through cracks in the foundation, basement, or crawl space. Once inside, radon can become trapped and build up to dangerous levels.

When you breathe air containing radon, tiny radioactive particles get trapped in your lungs. These particles break down and release small bursts of energy that can damage lung tissue over time, potentially leading to lung cancer.

There are no immediate symptoms from radon exposure. It has no irritating effects or warning signs.

The only way to know if your home has a radon problem is to test for it.

Do-it-yourself test kits are simple to use and inexpensive. You can also work with a professional to test your home.

If your test results show elevated levels, work with a professional to install a mitigation system. These systems collect radon gas from underneath the home and vent it outside, reducing radon levels indoors.

Knowing your level of radon risk—and fixing it if high levels are present—may save a life.

Test. Fix. Save a life.

Learn more at Lung.org/radon

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Testing and mitigating your home for radon

Radon is the second leading cause of lung cancer and is found at elevated levels in one out of every two Colorado homes. Thankfully, it is easy to identify and fix a radon problem.

Healthcare and Medical Community

Are Your Patients Safe from Radon?

Are you a healthcare professional interested in radon prevention, education, testing, mitigation, and research? 

If so, please join our Radon Healthcare Forum

Forum meetings are held the third Thursday of each month from 12:00pm-12:45pm via MS Teams. Click on this link to join.

Forum dates are:

  • Thursday, July 10 from 12:00-12:45

Our goal is to promote the following in the medical community: 

  • Radon awareness.  
  • Radon testing and mitigation.
  • The health risks associated with radon.  

Free educational materials available for healthcare providers to give to patients.  

New! Radon Reduction Toolkit for Healthcare Providers

Find information, infographics, and videos to share with your patients and office staff.
Access Toolkit

Schools and Daycare

Colorado statute requires all schools to test for radon and to maintain records of the test results for disclosure on request. 

The statute doesn’t require schools to mitigate, so it’s up to the school district and its constituents to address mitigation issues.

Learn more about the requirements: 

Real Estate

Find resources for real estate transactions, mitigation, new home construction and more through the Colorado Department of Public Health & Environment.  

Helpful materials: 

  • Is Your Home Safe From Radon | in Spanish 
  • Colorado Low-income Radon Mitigation Assistance Program (LIRMA) | in Spanish 
  • Radon and Real Estate Transactions in Colorado

For additional information visit our Radon Resources for Professionals page.  

Page last updated: July 9, 2025

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