Knowing Your Radon Risk: A Common Invisible Killer

Radon is a colorless, odorless radioactive gas produced by the natural breakdown of uranium in soil and rock. It can enter homes through foundation cracks and openings — and because you can’t see or smell it, testing is the only way to know your levels.

How Common Is Radon in the US?

Radon exposure is widespread across the country.

1 in 15 U.S. homes has levels above the EPA action threshold.
Elevated readings have been found in every state, in homes of all ages.
Higher concentrations are common in regions with rocky or uranium-rich soil.

Why Radon Matters

Radon is the second leading cause of lung cancer in the United States. Long-term exposure increases cancer risk for everyone, including nonsmokers.

Health Risks Include:

Increased likelihood of developing lung cancer
Higher risk for smokers and former smokers
Potential long-term respiratory damage

How Radon Enters Homes

Cracks in floors, walls or foundations
Gaps around pipes, sump pumps and utility lines
Construction joints or porous building materials
Well water (less common)

What To Do If You’ve Been Exposed to Radon

You can’t reverse past exposure, but you can reduce your future risk.

If You’re Concerned About Exposure:

Test your home as soon as possible, even if you’ve lived there for years.
Share the results with your health care provider, especially if you have a history of smoking.
Discuss whether lung cancer screening (such as low-dose CT) is appropriate based on your risk factors.

Radon Safety Tips & Prevention

Immediate Steps:

Use a home radon test kit or hire a certified radon tester.
Improve ventilation in basements and crawl spaces.
Retest every two years or after home renovations.

Long-Term Prevention Strategies:

Seal cracks and gaps in your foundation.
Install a certified radon mitigation system if levels are elevated.
Work with a licensed radon professional for ongoing monitoring and repairs.

Regular testing and mitigation remain the most effective ways to protect yourself and your household from radon exposure.

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