Radon risk is often described by the EPA, radon mitigators, and others using dramatic comparisons that make the numbers sound scarier than they are. This tool shows the same EPA estimates—just translated into plain percentages and odds—so you can understand the risk without fear or pressure.
4.0 pCi/L
Never-smoker
Number of people in 1,000 that would die from lung cancer if exposed to radon for a lifetime at this level
7 in 1000
Percentage
0.7%
Odds
1 in 143
Smoker
Number of people in 1,000 that would die from lung cancer if exposed to radon for a lifetime at this level
62 in 1000
Percentage
6.2%
Odds
1 in 15
This is a long-term exposure risk, not an immediate danger. You have time to understand your results, compare contractors, and make a thoughtful decision.
What this means for you
- These numbers reflect decades of exposure, not days or weeks
- Short-term spikes do not create sudden danger
- You can take your time to make a calm, informed decision
- Reducing radon can lower this long-term risk even further