Utah Radon Risk
Why Utah is a High-Risk State for Radon
Utah’s geology puts its residents at significantly higher risk than the national average — and most families don’t know it.
The Geology Factor
Utah sits atop some of the most uranium-rich geology in North America. The Wasatch Range, Oquirrh Mountains, and the Colorado Plateau are all underlain by granitic and sedimentary rocks with elevated concentrations of uranium and radium — the parent elements that decay into radon.
As uranium slowly decays in the soil, it releases radon gas. That gas migrates upward through soil pores and foundation cracks, accumulating inside homes — especially in basements and lower floors where ventilation is limited.
Valley Trapping Effect
Utah’s Wasatch Front communities — Salt Lake City, Provo, Ogden — sit in enclosed valleys surrounded by mountains. The same inversion patterns that trap pollution in winter also limit natural ventilation, allowing radon that seeps into homes to concentrate at higher levels.
Homes in these valleys, particularly those with basements or slab-on-grade foundations built before modern radon-resistant construction codes, are at the greatest risk.
Radon by county
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Salt Lake County
Interactive radon map — coming soon
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