Radon & Lung Cancer: The Real Dangers

Radon is the #1 cause of lung cancer in people who have never smoked, and the second leading cause of lung cancer overall, behind only smoking. The EPA and U.S. Surgeon General link it to roughly 21,000 deaths every year in the United States.

How Radon Harms Your Lungs

When you breathe air containing radon, radioactive particles can get trapped in your lungs. As they continue to break down, they release small bursts of energy that damage lung tissue. Most people have no symptoms for years, radon causes no coughing, headaches, or irritation in the short term, which is exactly what makes it so dangerous. By the time lung cancer appears, exposure has been happening quietly for a long time.

The Risk Adds Up Over Time

Radon risk is cumulative. The higher your level and the longer you’re exposed, the greater your lifetime risk. A family spending years in a home at 8–10+ pCi/L is taking on substantial, avoidable risk, and children, who breathe faster, may be especially vulnerable.

Smokers Face the Highest Risk of All

Radon and smoking multiply each other’s danger. A smoker in a high-radon home has a dramatically higher lung-cancer risk than either factor alone. If anyone in your household smokes, radon mitigation is even more urgent.

The Good News: It’s Preventable

Unlike many cancer risks, radon is one you can simply remove from your home. Testing is cheap, and a mitigation system reliably brings levels down below the action level, usually in a single day. Get a free mitigation quote →