Utah has 29 counties, with 7 classified as EPA Zone 1 (highest risk). With an average radon level of 7.65 pCi/L, Utah state testing data reveals significantly elevated risks across multiple counties. Testing is highly recommended.
Utah is the 13th largest state in terms of size and the 33rd most populous. It also happens to be the tenth least densely populated state in the entire US with a population of 2.9 million.
Utah does have an active radon program, dedicated to educating citizens about the risks associated with the deadly gas. You can find more information on Radon, testing and mitigation at the official page.
Explore radon data organized by metro region, including average levels, hotspot cities, and local mitigation professionals.
Cities with the most user-submitted radon test data, ranked by number of submissions.
| City | Avg User Radon Level | Submissions |
|---|---|---|
| Vernal | 8.60 pCi/L | 5 |
| Logan | 8.00 pCi/L | 5 |
| Smithfield | 12.00 pCi/L | 4 |
| Bountiful | 6.75 pCi/L | 4 |
| Cedar City | 4.50 pCi/L | 4 |
| Eagle Mountain | 10.67 pCi/L | 3 |
| Heber City | 5.00 pCi/L | 3 |
| Brigham City | 9.00 pCi/L | 1 |
| Lehi | 7.00 pCi/L | 1 |
| Saint George | No submissions | 0 |
| Sandy | No submissions | 0 |
All 29 Utah counties with their EPA radon zone classification and user-submitted average radon levels.
Browse radon data for individual cities across Utah. Each city page includes user-submitted radon levels, local contractors, and mitigation resources.