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Radon Levels in Garfield County, Utah

EPA puts Garfield County in Zone 2, its middle radon zone, and only 15 radon tests from it are on file with CDC (2023). Homes with elevated levels occur in all three zones, so only a test measures yours.

Data checked By Radon411Methodology

How to test this homeFind a certified tester

  • Share at 4+ pCi/L

    33.3%

    4.4 pts below UT

    Garfield
    33.3%
    Utah
    37.7%

    36 tests, 2022

  • Median result

    2.7pCi/L

    Below action level

    Garfield
    2.7 pCi/L
    EPA
    4.0 pCi/L

    Midpoint of the tests, 2022

  • Tests reported

    36

    24th of 24 by tests

    Garfield
    36
    Salt Lake
    15,201

    Reported to CDC before any fix, 2022

  • EPA radon zone

    Zone 2

    Moderate potential

    1. 1
    2. Zone 2
    3. 3

    1 highest, 3 lowest

    EPA predicts 2 to 4 pCi/L indoors

  • Rank in Utah

    17 of 24

    Middle half

    Garfield
    33.3%
    Beaver
    88.9%

    By share, of 24 with 30+ tests

Read a result for Garfield County

Starts at Garfield County's median, 2.7 pCi/L

2.7pCi/L

EPA’s own thresholds; the figures are the area’s, never this home’s.

EPA’s reading of 2.7 pCi/L

Between 2 and 4 pCi/L

  1. Under 20 to 1.9 pCi/L
  2. 2 to 4consider a fix
  3. 4 and aboveEPA says fix it

This result is between 2 and 4 pCi/L. EPA recommends considering a fix when the level is between 2 and 4 pCi/L. Garfield County's median reported result, 2022.

Interpret this readingWhat a fix costs

The data

Garfield County, At a glance

Garfield County at a glance

Predicted: EPA radon zone

EPA Zone 2: moderate predicted potential

Garfield County is a county: EPA's forecast for it as a whole is an average indoor of 2 to 4 pCi/L (75 to 150 Bq/m³). It describes no single address, and homes above EPA's are found in every zone, this one included.

USGS geologic potential: Moderate across 68% of the county's area

Predicted: EPA Map of Radon Zones

Measured: tests reported to CDC

Radon tests reported for Garfield County, 2023

Share of reported tests at or above 4 pCi/L, by year, Garfield County
Share of reported tests at or above 4 pCi/L, by year, Garfield County
YearShare of reported tests at or above 4 pCi/L
201466.7%
201558.3%
201625.0%
201725.0%
20180.0%
20200.0%
202150.0%
202233.3%
202340.0%

2023: 40.0%. Across these years the share ran from 0.0% to 66.7%. Each column counts radon tests reported to CDC that year, not homes.

What these figures count

Only 15 tests were reported to CDC for Garfield County over 2023, and tests are often run on homes being sold or already suspected of a problem: so few describe neither the county nor this house.

Measured: CDC tracking data. Figure above: 2023. Measured data period: 2005 to 2023 (every CDC figure on file).

How to read these figures

Garfield County, Compared

Garfield County radon figures, compared

Calculated by Radon411

In Garfield County, about 3 in 10 reported tests in 2022 (12 of 36) were at or above EPA's action level. Against the national pool of 23.9%, the gap is 9.4 points higher. Across 28 Utah counties pooled together, 37.7% of tests reached that level, so Garfield County runs 4.4 points below its state.

The newest figure, in 2023, counts only 15 tests (40.0% at or above 4 pCi/L), too few to compare, so this reading uses the 36-test figure.

Of 3 neighbours with a figure, 2 reported a larger share at or above 4 pCi/L and 1 a smaller one; the spread is 17.8% (Iron County) to 88.9% (Beaver County). By share, Garfield County is 17th of 24 Utah counties with 30 or more tests for the same period.

Half the tests came in under 2.7 pCi/L and half over it; the single highest reached 8.4 pCi/L. Below the action level, 9 tests (25.0%) came in under 2 pCi/L, against 33.5% statewide, and 15 tests (41.7%) fell between 2 and 4, against 28.8% statewide.

Zone 2 on EPA's map (predicted average between 2 and 4 pCi/L) and a 33.3% share point the same way here. USGS geology rates 68% of the county's land moderate radon potential.

The busiest year on file was 2022, with 36 tests reported; the quietest, 2020, had 1.

Garfield County against Utah, the United States and nearby counties, 2022
AreaTestsAt or above 4 pCi/LMedianDifference from Garfield County
Garfield County3633.3%2.7 pCi/LThis county
Utah, pooled28 counties, pooled41,00437.7%Not pooled+4.4 points
United States, pooled853 counties, pooled333,14023.9%Not pooled−9.4 points
Box Elder Countyhighest in the state44463.5%5.7 pCi/L+30.2 points
Washington Countylowest in the state9249.4%1.4 pCi/L−23.9 points
Beaver County, UTborders it8188.9%18.0 pCi/L+55.6 points
Wayne County, UTborders it1560.0%6.2 pCi/L+26.7 points
San Juan County, UTborders it3946.2%2.7 pCi/L+12.9 points
Kane County, UTborders it2128.6%1.4 pCi/L−4.7 points
Iron County, UTborders it30317.8%2.1 pCi/L−15.5 points
Piute County, UTborders it30.0%0.7 pCi/L−33.3 points
Where Garfield County's reported results fell, 2022, beside Utah and the United States
ResultGarfield County testsGarfield County shareUtah shareU.S. shareAgainst Utah
Under 2 pCi/L925.0%33.5%54.5%−8.5 points
2 to 4 pCi/L1541.7%28.8%21.7%+12.9 points
4 pCi/L and above1233.3%37.7%23.9%−4.4 points
Garfield County ranked among the 24 Utah counties with 30 or more tests, by share at or above 4 pCi/L, 2022
CountyRankTestsAt or above 4 pCi/LMedian
Uintah County12 of 2429445.9%3.7 pCi/L
Utah County13 of 2410,77342.9%3.3 pCi/L
Carbon County14 of 2438440.6%3.0 pCi/L
Summit County15 of 241,04140.3%2.9 pCi/L
Salt Lake County16 of 2415,20134.4%2.8 pCi/L
Garfield County17 of 243633.3%2.7 pCi/L
Emery County18 of 2417732.2%3.3 pCi/L
Davis County19 of 244,64132.2%2.5 pCi/L
Weber County20 of 242,31930.1%2.2 pCi/L
Millard County21 of 2412626.2%2.5 pCi/L
Iron County22 of 2430317.8%2.1 pCi/L
Garfield County radon tests by year, against Utah's pooled share
YearTestsAt or above 4 pCi/LMedianHighestUtah, pooledChange from the row before
20231540.0%3.7 pCi/L9.8 pCi/L36.1%+6.7 points
20223633.3%2.7 pCi/L8.4 pCi/L37.7%−16.7 points
2021650.0%2.5 pCi/L5.3 pCi/L34.2%+50.0 points
202010.0%2.0 pCi/L2.0 pCi/L37.6%Level
201820.0%2.8 pCi/L3.5 pCi/L36.6%−25.0 points
2017425.0%0.8 pCi/L24.6 pCi/L38.2%Level
20161625.0%2.8 pCi/L10.4 pCi/L39.8%−33.3 points
20151258.3%5.4 pCi/L32.1 pCi/L42.3%−8.4 points
2014666.7%6.2 pCi/L12.9 pCi/L43.4%First on file

Pooled shares: Radon411's sum of CDC's county counts for one period.

Garfield County, Geology

The ground under Garfield County

Predicted

USGS's geologic map splits Garfield County: 67.9% of its land is moderate radon potential and 32.1% high. The map puts 67.9% of Garfield County in the area it calls Colorado Plateau and 32.1% in High Plateau. USGS gives the first a radon index of 9, in the moderate band (9 to 11), and the second 13, in the high band (12 to 17).

USGS's geologic areas under Garfield County
AreaThe rock, in USGS's wordsPotentialRadon indexShare of land
Colorado PlateauPaleozoic and Mesozoic sandstone, shale, limestone.Moderate967.9%
High PlateauTertiary volcanic and volcaniclastic rocks.High1332.1%

Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.

Garfield County beside the ground around it

On high-potential ground Garfield County is close to Utah as a whole: 32.1% of its land against 32.8%. Of the 6 counties that border it, 2 have more high-potential ground, Piute County the most at 100%.

Share of land by USGS radon potential: Garfield County, the 6 counties bordering it and Utah
AreaEPA zoneLow potentialModerate potentialHigh potential
Garfield CountyZone 2None67.9%32.1%
Kane CountyZone 2None96.3%3.7%
Piute CountyZone 1NoneNone100%
Wayne CountyZone 2None85.7%14.3%
San Juan CountyZone 2None78.3%21.7%
Iron CountyZone 2None63.7%36.3%
Beaver CountyZone 2None85.3%14.7%
Utah29 counties, pooled by land areaVariesNone67.2%32.8%

The map rates the ground, not the air in any home.

Local help

Garfield County, Local resources

Radon testing and mitigation in Garfield County

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?"

What it means

Garfield County, Questions

Questions about radon in Garfield County

Are radon levels high in Garfield County?

In 2023, 40.0% of the radon tests reported to CDC for Garfield County, Utah were at or above 4 pCi/L, and the median reported pre-mitigation result was 3.7 pCi/L. Of 24 Utah counties with 30 or more tests for the same period, 16 reported a higher share; pooled, the state comes to 37.7%.

Which counties border Garfield County?

Garfield County borders 6 counties: Kane County, Piute County, Wayne County, San Juan County, Iron County and Beaver County.

Products

Garfield County, Products

Testing a home in Garfield County

In Garfield County, 33.3% of 36 tests reported to CDC in 2022 reached 4 pCi/L, against 37.7% pooled across Utah. In Zone 2 a short-term kit (2 to 90 days) is the quick first check in Garfield County; a long-term test tells the year-round average.

Test kits and monitors3

See every kit and monitor

Best radon monitors for Garfield County homes, compared

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Garfield County, Bordering counties

Counties bordering Garfield County

Calculated by Radon411

Garfield County, Cities and towns

Cities and towns in Garfield County

The Census Bureau estimates 5,256 residents in Garfield County for July 1, 2025, 151 more than in 2020 (+3.0%). Spread over its land, that is 1.0 people to the square mile. Its largest town, Panguitch, has 1,779 residents, 33.8% of the total. Together its 9 incorporated places hold 83.1% of those residents; the other 16.9% live outside any of them. Reported testing is thin here: 36 tests over 2022, or 6.8 for every 1,000 residents (2025 estimate), where Utah as a whole comes to 11.6.

From Panguitch to Antimony, CDC publishes no figure by town: each reads Garfield County's.

The cities and towns in Garfield County by residents, July 1, 2025
PlaceResidentsSince 2020Share of residents
Panguitch1,779+2.5%33.8%
Escalante817+3.0%15.5%
Tropic497+3.1%9.5%
Bryce Canyon City348+1.8%6.6%
Boulder248+5.5%4.7%
Henrieville231+4.5%4.4%
Cannonville189+3.8%3.6%
Hatch135+3.1%2.6%
Antimony123+3.4%2.3%

9 incorporated places, as listed in the U.S. Census Bureau’s 2020 place reference files. Residents: U.S. Census Bureau population estimates for July 1, 2025 (Vintage 2025).

Garfield County, Homes

Homes in Garfield County

Garfield County is a place of houses on their own lots: 85% of its 3,589 homes are detached single-family houses, against 67% across Utah. The homes are older than Utah's as a whole: half were built before 1982 (1991 for Utah), and 24% date from before 1960. 74% of occupied homes are lived in by their owner (Utah: 71%); in the rest a tenant can run a test, but a fix is the landlord's to make.

Homes in Garfield County, Utah, 2019 to 2023
HomesGarfield CountyUtah
Housing units3,5891,193,082
Detached houses85%67%
In buildings of 5 or more1%16%
Mobile homes9%3%
Built before 196024%16%
Built since 200023%37%
Middle year built19821991
Owner-occupied74%71%

Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.