Radon levels in Utah

Verified county-level radon indicators are available for 28 Utah counties. Select a county for its source period and sample details.

High results are most common in Box Elder County (64%) and least common in Grand County (15%)Share of tests at or above 4 pCi/L by county · Radon test results from laboratories, 2008–2017 · 28 of 29 counties have data
Beaver County: 100% of tests at or above 4 pCi/L · 4 testsBox Elder County: 64% of tests at or above 4 pCi/L · 440 testsCache County: 57% of tests at or above 4 pCi/L · 1,339 testsCarbon County: 32% of tests at or above 4 pCi/L · 65 testsDaggett County: 0% of tests at or above 4 pCi/L · 2 testsDavis County: 34% of tests at or above 4 pCi/L · 2,660 testsDuchesne County: 47% of tests at or above 4 pCi/L · 38 testsEmery County: 0% of tests at or above 4 pCi/L · 1 testsGarfield County: 100% of tests at or above 4 pCi/L · 3 testsGrand County: 15% of tests at or above 4 pCi/L · 61 testsIron County: 22% of tests at or above 4 pCi/L · 107 testsJuab County: 61% of tests at or above 4 pCi/L · 41 testsKane County: 39% of tests at or above 4 pCi/L · 18 testsMillard County: 11% of tests at or above 4 pCi/L · 9 testsMorgan County: 61% of tests at or above 4 pCi/L · 94 testsPiute County: no dataRich County: 0% of tests at or above 4 pCi/L · 2 testsSalt Lake County: 39% of tests at or above 4 pCi/L · 13,760 testsSan Juan County: 67% of tests at or above 4 pCi/L · 15 testsSanpete County: 61% of tests at or above 4 pCi/L · 80 testsSevier County: 55% of tests at or above 4 pCi/L · 108 testsSummit County: 33% of tests at or above 4 pCi/L · 894 testsTooele County: 45% of tests at or above 4 pCi/L · 471 testsUintah County: 55% of tests at or above 4 pCi/L · 85 testsUtah County: 48% of tests at or above 4 pCi/L · 6,171 testsWasatch County: 62% of tests at or above 4 pCi/L · 496 testsWashington County: 15% of tests at or above 4 pCi/L · 250 testsWayne County: 40% of tests at or above 4 pCi/L · 5 testsWeber County: 36% of tests at or above 4 pCi/L · 1,123 tests
  • Under 10%
  • 10–20%
  • 20–30%
  • 30–40%
  • 40% or more
  • No data

Counties

CountyTests% ≥ 4 pCi/LMedian (pCi/L)EPA zone (1993)Source
Beaver County4100%99.9Zone 2Radon test results from laboratories through 2017
Box Elder County44064%5.8Zone 2Radon test results from laboratories through 2017
Cache County1,33957%4.7Zone 2Radon test results from laboratories through 2017
Carbon County6532%2.7Zone 1Radon test results from laboratories through 2017
Daggett County20%0.8Zone 2Radon test results from laboratories through 2017
Davis County2,66034%2.7Zone 2Radon test results from laboratories through 2017
Duchesne County3847%3.9Zone 1Radon test results from laboratories through 2017
Emery County10%3.4Zone 2Radon test results from laboratories through 2017
Garfield County3100%6.0Zone 2Radon test results from laboratories through 2017
Grand County6115%1.4Zone 1Radon test results from laboratories through 2017
Iron County10722%2.3Zone 2Radon test results from laboratories through 2017
Juab County4161%6.2Zone 2Radon test results from laboratories through 2017
Kane County1839%2.5Zone 2Radon test results from laboratories through 2017
Millard County911%2.3Zone 2Radon test results from laboratories through 2017
Morgan County9461%4.7Zone 2Radon test results from laboratories through 2017
Piute County———Zone 1—
Rich County20%1.4Zone 2Radon test results from laboratories through 2017
Salt Lake County13,76039%3.1Zone 2Radon test results from laboratories through 2017
San Juan County1567%5.1Zone 2Radon test results from laboratories through 2017
Sanpete County8061%5.7Zone 1Radon test results from laboratories through 2017
Sevier County10855%4.7Zone 1Radon test results from laboratories through 2017
Summit County89433%2.6Zone 2Radon test results from laboratories through 2017
Tooele County47145%3.5Zone 2Radon test results from laboratories through 2017
Uintah County8555%4.2Zone 1Radon test results from laboratories through 2017
Utah County6,17148%3.8Zone 2Radon test results from laboratories through 2017
Wasatch County49662%6.0Zone 2Radon test results from laboratories through 2017
Washington County25015%1.8Zone 2Radon test results from laboratories through 2017
Wayne County540%3.9Zone 2Radon test results from laboratories through 2017
Weber County1,12336%2.6Zone 2Radon test results from laboratories through 2017

Test your home

County figures show how often tests come back high, not the level in your home. Only a test tells you that: see how to test for radon.

Sponsored: we earn a commission on purchases through these links. We haven't tested Airthings monitors yet.

Prefer a digital monitor? See Airthings radon monitors, or enter code radonbycounty-10OFF at their discount store for 10% off.