Radon Risk Calculator
Find out what your radon level really means for your family's health.
Enter Your Radon Level
Slide or type your radon test result in pCi/L (picocuries per liter)
Based on EPA lifetime exposure risk modeling — equivalent lung cancer risk, not literal smoke.
Concerned About Your Radon Level?
Our certified technicians can reduce your radon to safe levels — usually in one day.
Call Now: (207) 483-5637 Get a Free QuoteRadon Level Reference Chart
Understanding what different radon levels mean
| Radon Level (pCi/L) | Cigarette Equivalent | Risk Level | EPA Recommendation |
|---|---|---|---|
| 0 – 1.9 | 0 – 4 cigarettes/day | Low Risk | No action needed |
| 2.0 – 3.9 | 4 – 8 cigarettes/day | Moderate Risk | Consider mitigation |
| 4.0 – 7.9 | 8 – 16 cigarettes/day | High Risk | EPA action level — mitigate |
| 8.0+ | 1 pack/day or more | Very High Risk | Mitigate immediately |
Frequently Asked Questions
What is a safe radon level?
The EPA considers any level below 2.0 pCi/L as acceptable. However, there is technically no "safe" level of radon — any exposure carries some risk. The EPA recommends taking action at 4.0 pCi/L or higher, and considering mitigation between 2.0 and 4.0 pCi/L.
How does radon compare to smoking cigarettes?
Research from the EPA and the National Academy of Sciences shows that breathing radon at 4.0 pCi/L carries approximately the same lung cancer risk as smoking 8 cigarettes per day. At 8.0 pCi/L, it's equivalent to smoking a full pack per day. This comparison is based on lifetime exposure risk modeling.
Why is radon so high in Maine?
Maine sits on granite bedrock that naturally contains uranium. As uranium decays, it produces radon gas that seeps up through soil and into homes through foundation cracks, gaps, and openings. The state's geology makes radon testing essential for every Maine homeowner.
How quickly can radon be reduced?
Professional radon mitigation systems can reduce radon levels by up to 99%. Most installations are completed in a single day, and results are typically seen within 24–48 hours. Our systems are designed to continuously protect your home.
How accurate is this calculator?
The cigarette equivalency is based on well-established EPA and NAS research comparing lifetime radon exposure to smoking-related lung cancer risk. The approximation (roughly 2 cigarettes per 1 pCi/L) is widely used by radon professionals and public health organizations.
Don't Wait — Protect Your Family Today
If your radon level is above 4.0 pCi/L, every day you wait increases your risk. We can usually install a system within days of your call.
Call Now: (207) 483-5637