What Does My Radon Level Mean?
If your radon test shows 4 pCi/L or more, the U.S. EPA recommends fixing your home. Between 2 and 4 pCi/L, EPA says to consider fixing it. Enter your result below to see where it falls.
EPA guidance by level
| Your result | What EPA says |
|---|---|
| 4 pCi/L or more | Fix your home. |
| 2 to 4 pCi/L | Consider fixing. |
| Under 2 pCi/L | Lowering radon below 2 pCi/L is difficult. The average indoor level is about 1.3 pCi/L. |
Source: U.S. EPA, Health Risk of Radon. Wisconsin's Department of Health Services also says that if your levels are above 4 pCi/L, a contractor can help lower them by installing a radon mitigation system (Wisconsin DHS radon page).
Is one test enough?
Radon goes up and down with the weather and the seasons, so a single short-term test is a snapshot. See how to test your home for radon for short-term and long-term tests and when to retest.
What happens if I need a system?
A certified radon mitigation contractor looks at your home and quotes a system. Wisconsin doesn't license radon contractors, so look for NRPP or NRSB certification. See what radon mitigation costs for the questions to ask.
Get a free radon mitigation quote
Takes about 1 minute. Shared with one certified local contractor, never a list.
Frequently asked questions
What is a pCi/L?
Picocuries per liter of air. It's the unit U.S. radon test labs use to report results.
My result is 3.5. Do I need to fix it?
EPA says to consider fixing a home between 2 and 4 pCi/L. Many people retest first to confirm the number, then decide.
Does this checker tell me if my home is safe?
No. It shows where your number falls in EPA's guidance. It isn't medical advice. For health questions, talk with your doctor.