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Locations and reports

Utah Radon Map and Levels by County

Utah's counties span EPA Zones 1 and 2. Homes with elevated levels occur in all three zones, so only a test measures yours.

Data checked By Radon411Methodology

Predicted
7 of 29counties in Zone 1, EPA's highest radon zone
Measured
By countyCDC publishes Utah's test figures by county: 29 of 29 counties have one.
Your home
Test to knowNo area figure here is a reading of your home.
How to test this homeFind a certified tester

The data

Utah, At a glance

Utah at a glance

Predicted: EPA radon zone

29 of 29 counties classified

EPA classifies counties, not states. Of the 29 counties in Utah with a zone, 7 are in Zone 1 and 22 in Zone 2.

  • Zone 1: Highest predicted potentialgreater than 4 pCi/L7 of 29 counties · 24.1%
  • Zone 2: Moderate predicted potential2 to 4 pCi/L22 of 29 counties · 75.9%

An EPA radon zone describes predicted potential across a whole county. It is not intended to determine whether any individual home should be tested, and homes with elevated levels occur in all three zones. EPA recommends testing every home regardless of zone, and testing is the only way to know the radon level in a specific building.

Predicted: EPA Map of Radon Zones

Measured: tests reported to CDC

CDC test figures, county by county

CDC publishes Utah's radon test figures by county: 29 of its 29 counties have one. Each one's share is in the county list.

Utah, Counties

Utah counties by EPA zone

Predicted

Utah's radon map, then all 29 counties by the zone EPA predicts for each, highest reported share of tests at or above 4 pCi/L first. Each has its own report.

Utah radon map by county: EPA radon zones. Map of Utah's 29 counties shaded by EPA radon zone: Zone 1 in red-orange, Zone 2 in amber. 7 in Zone 1, 22 in Zone 2, 0 in Zone 3.
Utah radon map by countyEPA radon zones for Utah's counties: 7 counties in Zone 1, 22 counties in Zone 2, 0 counties in Zone 3.Predicted potential for each county, not a reading of any home. Homes with elevated levels of radon have been found in all three zones.

Zone 1: highest predicted potential7

Local help

Utah, Local resources

Local resources in Utah

Who to ask in Utah: its radon program, test kits and professionals.

What Utah's program says
Phone
(801) 536-0091
Disclosure when a home is sold or rented
Utah requires that sellers disclose "Hazardous Conditions: Are there any hazardous conditions on the Property such as Radon gas in house or well?"

Radon Action Brief

National Radon Action MonthPre-sale

The radon brief for your Utah county, in one dated file.

  • Your area's radon record, explained.
  • Your plan to test this week.
  • Fix costs and pros near you.

Save 64%Sale price: $8.99Price after the sale: $25Ends Jan 31Then $25

Get your Utah county's BriefSee a free sample

Area data, not a test of the building.

What it means

Utah, Questions

Questions about radon in Utah

Common questions

9 questions, answered from the figures above

Is radon a problem in Utah?

EPA's Map of Radon Zones places 7 of the 29 Utah counties it classifies in Zone 1, the highest predicted potential, 22 in Zone 2 and 0 in Zone 3. An EPA radon zone describes predicted potential across a whole county. It is not intended to determine whether any individual home should be tested, and homes with elevated levels occur in all three zones. EPA recommends testing every home regardless of zone, and testing is the only way to know the radon level in a specific building.

Utah on the radon mapRadon levels by state

How do I get a radon test in Utah?

EPA says you can test your home yourself or hire a qualified radon test company, and that either approach takes only a small amount of time and effort. The Utah radon program is the place to ask about certified testers and any test kit offer it runs.

How to test a homeFree and low-cost kits by stateUtah radon program

Which Utah counties are in EPA radon Zone 1?

7 counties are in Zone 1: Carbon County, Duchesne County, Grand County, Piute County, Sanpete County, Sevier County, Uintah County. Zone 1 is EPA's class for highest predicted potential, a predicted average indoor screening level greater than 4 pCi/L. A zone is a prediction for a county, not a measurement of any home.

Radon in Carbon CountyRadon in Duchesne CountyRadon in Grand County

Who does radon mitigation in Utah?

Radon411 has no radon business listed for Utah yet. EPA recommends having a qualified contractor fix a home with a radon problem, because lowering high radon levels takes technical knowledge and special skills, and some states require the work to be done by a licensed or certified professional.

How radon mitigation worksWhat mitigation costsRadon professionals in Utah

Which Utah counties have the highest radon?

29 of Utah's 29 counties have an EPA radon zone published here. Radon411 will not rank counties on data it does not hold, and a zone is a prediction for an area rather than a measurement of any building.

What share of radon tests in Utah are high?

CDC has published no statewide radon testing statistics for Utah, so we cannot give a figure. Where CDC does publish one, the percentage describes radon tests reported to CDC, not homes.

Which EPA region is Utah in?

Utah is in EPA Region 8: Mountains and Plains.

Do I need to test my home in Utah?

Yes, wherever you live in the state. Testing is the only way to know the radon level in a specific building. EPA recommends fixing a home when the radon level is 4 pCi/L or higher. EPA recommends considering a fix when the level is between 2 and 4 pCi/L.

Why does this page show coverage rather than one radon level for Utah?

A statewide figure averages counties with very different geology and very different numbers of reported tests, so it hides more than it shows. The county report is the level at which the EPA zone, the geologic potential and the reported testing statistics are actually published, which is why the county table above links to every one of them.

If you own, buy, sell or rent

What these figures mean for each reader, with the guide that covers it

The zone counts on this page describe counties across Utah. They are predictions for areas, and none of them measures your building.

Utah in figures

The figures above, said in words

What the published data says about Utah, in words. A zone and a share of tests describe an area, never the level in any one home.

    • Predicted

      Predicted

      EPA places 7 of Utah's 29 counties in Zone 1 and 22 in Zone 2.

      Zone 1 counties, A to Z, begin with Carbon County, Duchesne County and Grand County; the county section below lists all 7.

    • Compared

      Calculated by Radon411

      24% of Utah's counties with a zone on file are in Zone 1, a smaller share than across all U.S. counties (34%). It is a share of counties, not of land, people or homes.

  • Reported tests

    Measured

    CDC has no statewide testing figure for Utah on file here.

    29 of the 29 counties have a published county figure; the most tests in each one's latest year were reported for Salt Lake County (9,658 tests in 2023), Utah County (7,833 tests in 2023) and Davis County (3,594 tests in 2023).

  • Local record

    Utah's radon program is the Indoor Radon Program, run by Utah Department of Environmental Quality; its contacts are under Local resources.

    One city has a page setting the figures of the counties it lies in side by side: Ivins.

Products

Utah, Products

Testing and mitigation products

Whatever the figures for Utah show, only a test tells you about one home.

Test kits and monitors42

See all products

As an Amazon Associate, Radon411 earns from qualifying purchases.

Best radon monitors for Utah homes, compared

Testing

5

Mitigation

3

Explore

Cities in Utah with their own page

Radon data is published by county, not by city. Each city page sets the figures of the counties the city lies in side by side.

Utah, Next steps

What to do next

  1. LearnKnow what radon isWhat radon is, how it gets indoors, and why a county zone is not a reading for your home.Learn about radon
  2. TestTest the building you live inShort-term or long-term, where the device goes, and closed-house conditions.How to test
  3. FixBring a high level downHow a mitigation system works, and the retest that confirms it.How mitigation works
  4. Find a proHire a certified professionalMeasurement and mitigation professionals by state, with their certifications.Find a professional

Informational. Follow EPA guidance. EPA says all radon tests should be taken for a minimum of 48 hours, with windows and doors closed from 12 hours before a short-term test.