Utah County · Radon Data
Utah County Radon Levels
4.7
pCi/L average
26,930
tests analyzed
1.7×
WHO threshold (2.7)
Risk classification
What 4.7 pCi/L Means for Utah County Homes
Very High
Between 4.0–20.9 pCi/L. At or above the EPA action level. Mitigation is strongly recommended for any home in this area. Long-term exposure at these levels can more than double lung cancer risk for non-smokers.
Utah County's average of 4.7 pCi/L is 1.7× the WHO mitigation threshold of 2.7 pCi/L — well above the WHO mitigation threshold of 2.7 pCi/L. Utah's statewide average is 4.4 pCi/L, and the national average is 1.3 pCi/L.
County averages represent the arithmetic mean of all pre-mitigation tests in the area — they don't mean every home will measure exactly 4.7 pCi/L. Radon levels vary significantly based on foundation type, soil composition, construction materials, and ventilation. Two adjacent homes can have radon levels that differ by a factor of 5 or more. The only way to know your home's level is to test.
There is no safe level of radon exposure. Long-term exposure to radon is the second-leading cause of lung cancer in the US, responsible for approximately 21,000 deaths annually. The good news: mitigation systems are effective, reliable, and typically reduce radon levels by 80–99%.
City-Level Data
Radon Levels by City in Utah County
26 cities with 20+ tests. Sorted highest to lowest. Click any city for detailed data and year-over-year trends.
| City | Avg pCi/L | Risk |
|---|---|---|
| Genola | 7.4 | |
| Elk Ridge | 7.1 | |
| Woodland Hills | 6.6 | |
| Alpine | 6.4 | |
| Santaquin | 6.4 | |
| Lindon | 6 | |
| Highland | 5.9 | |
| Pleasant Grove | 5.6 | |
| Mapleton | 5.4 | |
| Payson | 5.4 | |
| Oakley | 5.2 | |
| Cedar Hills | 5 | |
| Salem | 5 | |
| Saratoga Springs | 4.9 | |
| Springville | 4.8 | |
| American Fork | 4.7 | |
| Eagle Mountain | 4.7 | |
| Lehi | 4.4 | |
| Provo | 4.4 | |
| Orem | 3.6 | |
| Spanish Fork | 3.3 | |
| Cedar City | 2.5 | |
| West Valley City | 2.5 | |
| Clearfield | 2.3 | |
| Vineyard | 2.1 | |
| Goshen | 1.5 |
Only cities with 20+ tests shown. Smaller sample sizes may not reliably represent a city's true average. All data: Alpha Energy Laboratories, 2015–August 2025.
Why Does Utah County Have Elevated Radon Levels?
Utah County covers a wide geographic range from the valley floor to the Wasatch foothills. Cities in the eastern and northern portions of the county — Alpine (6.4 pCi/L), Highland (5.9 pCi/L), and Lehi (4.4 pCi/L) — consistently show higher levels than communities closer to Utah Lake. The county's granite-rich Wasatch foothills are the primary radon source.
Regardless of county-level geology, the only authoritative measurement for any home is a test conducted inside that specific building. Foundation type, crawl space vs. slab construction, and ventilation all dramatically affect indoor levels — which is why testing every home individually is the only reliable approach.
Utah County Radon — Frequently Asked Questions
What is the average radon level in Utah County, Utah?
Utah County has an average indoor radon level of 4.7 pCi/L based on 26,930 pre-mitigation tests analyzed by Alpha Energy Laboratories from 2015 through August 2025. This is 1.7× the WHO's recommended mitigation threshold of 2.7 pCi/L and 1.1× Utah's statewide average of 4.4 pCi/L.
Is radon a serious concern in Utah County?
Yes. Utah County's average of 4.7 pCi/L is classified as very high. Between 4.0–20.9 pCi/L. At or above the EPA action level. Mitigation is strongly recommended for any home in this area. Long-term exposure at these levels can more than double lung cancer risk for non-smokers. Radon is the second-leading cause of lung cancer in the United States after smoking, responsible for approximately 21,000 deaths annually.
Which cities in Utah County have the highest radon levels?
Based on test data, the highest-averaging cities in Utah County are: Genola (7.4 pCi/L, 41 tests), Elk Ridge (7.1 pCi/L, 228 tests), Woodland Hills (6.6 pCi/L, 89 tests). Remember that city averages can mask significant variation between individual homes.
How do I get a radon test in Utah County, Utah?
Utah Radon provides free certified radon test kits to Utah homeowners, including those in Utah County. The kit is mailed to your home, you place it according to instructions, mail it back to Alpha Energy Laboratories, and receive your results within 2–3 weeks. There is no cost for the kit, shipping, or lab analysis. Request yours at utahradon.org/free-test-kit.
Protect your Utah County home
With a county average of 4.7 pCi/L — 1.7× the WHO mitigation threshold — Utah County homes should be tested. Your free kit is waiting.
Request your free test kit