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Radon Is The #1 Cause Of Lung Cancer In Non-Smokers
Radon causes an estimated 21,000 lung cancer deaths every year, and it's completely fixable. Find the right professional near you from 4,754 listed companies across the US and Canada.
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The Radon Pro Network has thousands of radon professionals ready to help protect you and your family from dangerous radon levels.Enter your ZIP code below to get a free quote from local pros near you.
What's Happening Under Your House
Radon Seeps In From The Soil.A Radon Mitigation System Removes It Before It Can Get In Your Home
Radon is a radioactive gas produced by uranium breaking down in the ground. It drifts up through cracks, sump pits, and slab joints, and concentrates inside your home, especially in basements and lower levels.
The fix is refreshingly simple: a radon pro seals a pipe into the foundation, and a quiet inline fan pulls the soil gas out from under the slab and vents it above the roof, before it ever enters your home. Most systems are installed in a single day and cut radon levels by up to 99%.
- Radon enters from the soil
- It gets trapped inside the home
- Installing a radon system vents radon gas outside rather than trapping it in your home
Why It Matters
You Cannot See It, And Your Family Breathes It Every Day
Radon is a radioactive gas that seeps out of the soil and collects in the lowest parts of a house, which is where basements, playrooms and bedrooms tend to be. It has no smell and no taste, so the only way to know what your family is breathing is to measure it.
It Is The Leading Cause Of Lung Cancer Among People Who Never Smoked
The EPA puts radon behind about 21,000 lung cancer deaths a year in the United States. The risk is not sudden, it is cumulative: it comes from years of breathing it at home, which is why the level in the house you sleep in matters more than almost anywhere else you spend time.
It is also fixable. A mitigation system is usually one day of work, and it typically cuts the level in a home by up to 99%.
A number people find easier to picture: the CDC and the American Lung Association both describe living with radon at the 4 pCi/L action level as carrying a lung cancer risk comparable to smoking about eight cigarettes a day.
That comparison comes from their consumer guidance, not from the EPA, whose own tables are the ones shown here. Published cigarette comparisons vary between sources, so treat it as a way to picture the risk rather than a conversion.
Out of 1,000 People, How Many Get Lung Cancer?
From a lifetime of living at that radon level. Figures published by the EPA.
| Radon level | Cases per 1,000 |
|---|---|
| 20 pCi/L | 36 Above both thresholds. The EPA says fix your home. About 35 times the risk of drowning. |
| 10 pCi/L | 18 Above both thresholds. The EPA says fix your home. About 20 times the risk of dying in a home fire. |
| 8 pCi/L | 15 Above both thresholds. The EPA says fix your home. About 4 times the risk of dying in a fall. |
| 4 pCi/L | 7 Above both thresholds. The EPA says fix your home. About the risk of dying in a car crash. |
| World Health Organization reference level, 2.7 pCi/L | |
| 2 pCi/L | 4 About the risk of dying from poison. |
| 1.3 pCi/L | 2 About the average level inside American homes. |
Two different action levels. The EPA tells you to fix a home at 4.0 pCi/L. The World Health Organization recommends a lower reference level of 100 Bq/m3, which is about 2.7 pCi/L, because it finds the risk rises steadily with exposure and no level has been shown to be safe.
Between those two numbers is a band where a home is below the level the EPA will tell you to act on and above the level the WHO would. The EPA itself suggests considering a fix anywhere between 2 and 4.
Radon is the leading cause of lung cancer among people who have never smoked. Switch to I Smoke above and every number on this table multiplies by roughly nine.
Risk figures from the US Environmental Protection Agency, Health Risk of Radon. Reference level from the World Health Organization, Handbook on Indoor Radon. Radon levels are measured in picocuries per liter, written pCi/L; the WHO publishes in becquerels per cubic meter, and 1 pCi/L is 37 Bq/m3.
Protect Your Home In Four Steps
Test
Every home below the third floor should be tested, levels vary house to house, even on the same street. A test takes 2–7 days and costs less than dinner out.
Fix If It's 4.0+
At or above 4.0 pCi/L, the EPA recommends mitigation. A mitigation contractor installs a system in about a day, typically $800–$2,500.
Breathe Easy
A post-mitigation test confirms your new level. Most systems get homes under 2.0 pCi/L and run silently for decades on a light-bulb's worth of power.
Retest
The only way to know your radon system is working is to retest after it's installed. The EPA recommends retesting at least every two years.
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