Skip to content
RADON411

Locations and reports

Radon Levels in Duchesne County, Utah

EPA puts Duchesne County in Zone 1, its highest radon zone, and 39.5% of its 81 reported radon tests (2023) were at or above 4 pCi/L. 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

    39.5%

    3.4 pts above UT

    Duchesne
    39.5%
    Utah
    36.1%

    81 tests, 2023

  • Median result

    3.2pCi/L

    Below action level

    Duchesne
    3.2 pCi/L
    EPA
    4.0 pCi/L

    Midpoint of the tests, 2023

  • Tests reported

    81

    16th of 22 by tests

    Duchesne
    81
    Salt Lake
    9,658

    Reported to CDC before any fix, 2023

  • EPA radon zone

    Zone 1

    Highest potential

    1. Zone 1
    2. 2
    3. 3

    1 highest, 3 lowest

    EPA predicts over 4 pCi/L indoors

  • Rank in Utah

    13 of 22

    Middle half

    Duchesne
    39.5%
    Beaver
    66.7%

    By share, of 22 with 30+ tests

Read a result for Duchesne County

Starts at Duchesne County's median, 3.2 pCi/L

3.2pCi/L

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

EPA’s reading of 3.2 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. Duchesne County's median reported result, 2023.

Interpret this readingWhat a fix costs

The data

Duchesne County, At a glance

Duchesne County at a glance

Predicted: EPA radon zone

EPA Zone 1: highest predicted potential

EPA puts all of Duchesne County in and predicts an average indoor of greater than 4 pCi/L (greater than 150 Bq/m³) across the county. That is one forecast for the whole county, not a reading of any address in it; homes above EPA's turn up in all three zones.

USGS geologic potential: High across 70% of the county's area

Predicted: EPA Map of Radon Zones

Measured: tests reported to CDC

Radon tests reported for Duchesne County, 2023

Share of reported tests at or above 4 pCi/L, by year, Duchesne County
Share of reported tests at or above 4 pCi/L, by year, Duchesne County
YearShare of reported tests at or above 4 pCi/L
201463.6%
201553.3%
201622.6%
201735.3%
201825.0%
201975.0%
202038.5%
202135.7%
202251.2%
202339.5%

2023: 39.5%. Across these years the share ran from 22.6% to 75.0%. Each column counts radon tests reported to CDC that year, not homes.

What these figures count

These are the 81 tests reported to CDC for Duchesne County over 2023, many from homes being sold or already suspected of a problem: they describe the county's reported tests, not 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

Duchesne County, Compared

Duchesne County radon figures, compared

Calculated by Radon411

In Duchesne County, about 4 in 10 reported tests in 2023 (32 of 81) were at or above EPA's action level. Against the national pool of 33.4%, the gap is 6.1 points higher. Across 29 Utah counties pooled together, 36.1% of tests reached that level, so Duchesne County runs 3.4 points above its state.

Of 5 neighbours with a figure, 3 reported a larger share at or above 4 pCi/L and 2 a smaller one; the spread is 23.2% (Carbon County) to 51.9% (Wasatch County). By share, Duchesne County is 13th of 22 Utah counties with 30 or more tests for the same period.

Year by year, 2016 opened at 22.6% and 2023 closed at 39.5% (up 16.9 points), with 2022 the high at 51.2%. Half the tests came in under 3.2 pCi/L and half over it; the single highest reached 79.4 pCi/L. Below the action level, 23 tests (28.4%) came in under 2 pCi/L, against 35.4% statewide, and 26 tests (32.1%) fell between 2 and 4, against 28.5% statewide.

Zone 1 on EPA's map (predicted average above 4 pCi/L) and a 39.5% share point the same way here. USGS geology rates 70% of the county's land high radon potential.

The busiest year on file was 2022, with 129 tests reported; the quietest, 2014, had 11.

Share of reported tests at or above 4 pCi/L by year, Duchesne County against Utah2016 to 2023, years with 30 or more tests: Duchesne County 22.6% to 39.5%, the state's pooled share 36.1% in 2023.
Duchesne CountyUtah, pooled
Share of reported tests at or above 4 pCi/L by year, Duchesne County against Utah: data table
YearTestsDuchesne County, at or above 4 pCi/LUtah, pooled
20163122.6%39.8%
202212951.2%37.7%
20238139.5%36.1%
Duchesne County against Utah, the United States and nearby counties, 2023
AreaTestsAt or above 4 pCi/LMedianDifference from Duchesne County
Duchesne County8139.5%3.2 pCi/LThis county
Utah, pooled29 counties, pooled27,42236.1%Not pooled−3.4 points
United States, pooled642 counties, pooled128,74033.4%Not pooled−6.1 points
Beaver Countyhighest in the state4266.7%9.3 pCi/L+27.2 points
Washington Countylowest in the state6579.9%1.3 pCi/L−29.6 points
Wasatch County, UTborders it32451.9%4.2 pCi/L+12.4 points
Uintah County, UTborders it10451.0%4.2 pCi/L+11.5 points
Daggett County, UTborders it450.0%6.3 pCi/L+10.5 points
Utah County, UTborders it7,83340.6%3.2 pCi/L+1.1 points
Summit County, UTborders it41732.6%2.4 pCi/L−6.9 points
Carbon County, UTborders it6923.2%2.3 pCi/L−16.3 points
Where Duchesne County's reported results fell, 2023, beside Utah and the United States
ResultDuchesne County testsDuchesne County shareUtah shareU.S. shareAgainst Utah
Under 2 pCi/L2328.4%35.4%41.4%−7.0 points
2 to 4 pCi/L2632.1%28.5%25.2%+3.6 points
4 pCi/L and above3239.5%36.1%33.4%+3.4 points
Duchesne County ranked among the 22 Utah counties with 30 or more tests, by share at or above 4 pCi/L, 2023
CountyRankTestsAt or above 4 pCi/LMedian
Cache County8 of 2299453.8%4.4 pCi/L
Wasatch County9 of 2232451.9%4.2 pCi/L
Uintah County10 of 2210451.0%4.2 pCi/L
Tooele County11 of 2257351.0%4.1 pCi/L
Utah County12 of 227,83340.6%3.2 pCi/L
Duchesne County13 of 228139.5%3.2 pCi/L
Emery County14 of 223938.5%2.7 pCi/L
Salt Lake County15 of 229,65833.1%2.6 pCi/L
Summit County16 of 2241732.6%2.4 pCi/L
Weber County17 of 221,66928.6%2.1 pCi/L
Davis County18 of 223,59428.4%2.4 pCi/L
Duchesne County radon tests by year, against Utah's pooled share
YearTestsAt or above 4 pCi/LMedianHighestUtah, pooledChange from the row before
20238139.5%3.2 pCi/L79.4 pCi/L36.1%−11.7 points
202212951.2%4.8 pCi/L46.8 pCi/L37.7%+15.5 points
20212835.7%3.3 pCi/L81.6 pCi/L34.2%−2.8 points
20201338.5%2.0 pCi/L11.3 pCi/L37.6%−36.5 points
20191275.0%4.8 pCi/L92.6 pCi/L37.7%+50.0 points
20182025.0%1.6 pCi/L45.1 pCi/L36.6%−10.3 points
20171735.3%1.7 pCi/L11.2 pCi/L38.2%+12.7 points
20163122.6%1.0 pCi/L11.2 pCi/L39.8%−30.7 points
20151553.3%6.0 pCi/L67.7 pCi/L42.3%−10.3 points
20141163.6%5.4 pCi/L39.5 pCi/L43.4%First on file

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

Duchesne County, Geology

The ground under Duchesne County

Predicted

USGS's geologic map splits Duchesne County: 70.1% of its land is high radon potential and 29.9% moderate. The map puts 69.8% of Duchesne County in the area it calls Uinta Basin and 29.9% in Uinta Mountains. USGS gives the first a radon index of 13, in the high band (12 to 17), and the second 10, in the moderate band (9 to 11).

USGS's geologic areas under Duchesne County
AreaThe rock, in USGS's wordsPotentialRadon indexShare of land
Uinta BasinUranium-bearing Tertiary sandstone and siltstone.High1369.8%
Uinta MountainsCretaceous marine shales with Tertiary continental sedimentary rocks on the southern flank.Moderate1029.9%

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

Duchesne County beside the ground around it

Duchesne County has more high-potential ground than Utah as a whole: 70.1% of its land against 32.8%. Of the 6 counties that border it, 1 has more high-potential ground, Carbon County the most at 100%.

Share of land by USGS radon potential: Duchesne County, the 6 counties bordering it and Utah
AreaEPA zoneLow potentialModerate potentialHigh potential
Duchesne CountyZone 1None29.9%70.1%
Wasatch CountyZone 2None57.8%42.2%
Carbon CountyZone 1NoneNone100%
Summit CountyZone 2None43.6%56.4%
Uintah CountyZone 1None30.5%69.5%
Daggett CountyZone 2None93.7%6.3%
Utah CountyZone 2None65.2%34.8%
Utah29 counties, pooled by land areaVariesNone67.2%32.8%

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

Local help

Duchesne County, Local resources

Radon testing and mitigation in Duchesne 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

Duchesne County, Questions

Questions about radon in Duchesne County

Are radon levels high in Duchesne County?

In 2023, 39.5% of the radon tests reported to CDC for Duchesne County, Utah were at or above 4 pCi/L, and the median reported pre-mitigation result was 3.2 pCi/L. Of 22 Utah counties with 30 or more tests for the same period, 12 reported a higher share; pooled, the state comes to 36.1%.

Which counties border Duchesne County?

Duchesne County borders 6 counties: Wasatch County, Carbon County, Summit County, Uintah County, Daggett County and Utah County.

Products

Duchesne County, Products

Testing a home in Duchesne County

In Duchesne County, 39.5% of 81 tests reported to CDC in 2023 reached 4 pCi/L, against 36.1% pooled across Utah. In Zone 1 the year-round level in Duchesne County is the one to know: a long-term test (more than 90 days) or a monitor, with a short-term kit for a first answer.

Test kits and monitors3

See every kit and monitor

Duchesne County is in EPA Zone 1, the highest predicted radon potential. Best radon monitors for Zone 1 counties like Duchesne County

Explore

Duchesne County, Bordering counties

Counties bordering Duchesne County

Calculated by Radon411

Duchesne County, Cities and towns

Cities and towns in Duchesne County

Duchesne County is growing: the Census Bureau puts it at 20,856 residents on July 1, 2025, up 6.3% from 19,617 in 2020. Spread over its land, that is 6.4 people to the square mile. Its largest town, Roosevelt, has 7,032 residents, 33.7% of the total. Together its 5 incorporated places hold 46.8% of those residents; the other 53.2% live outside any of them. Reported testing is thin here: 81 tests over 2023, or 3.9 for every 1,000 residents (2025 estimate), where Utah as a whole comes to 7.7.

From Roosevelt to Tabiona, CDC publishes no figure by town: each reads Duchesne County's.

The cities and towns in Duchesne County by residents, July 1, 2025
PlaceResidentsSince 2020Share of residents
Roosevelt7,032+3.9%33.7%
Duchesne1,722+7.9%8.3%
Myton586+5.2%2.8%
Altamont270+8.0%1.3%
Tabiona160+6.7%0.8%

5 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).

Duchesne County, Homes

Homes in Duchesne County

Of Duchesne County's 8,943 homes, 73% are detached houses, against 67% across Utah; 18% are mobile homes. Half of its homes were built before 1987, close to Utah's 1991: 14% date from before 1960 and 30% from 2000 or later. Owners live in 79% of the occupied homes (Utah: 71%), so for most households a test and a fix are their own to order.

Homes in Duchesne County, Utah, 2019 to 2023
HomesDuchesne CountyUtah
Housing units8,9431,193,082
Detached houses73%67%
In buildings of 5 or more2%16%
Mobile homes18%3%
Built before 196014%16%
Built since 200030%37%
Middle year built19871991
Owner-occupied79%71%

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