Short-term kitFirst Alert
RD1 short-term charcoal radon test kit
- Lab fee included
Method: Charcoal
In home: 2 to 4 days
Locations and reports
Radon Levels in Emery County, Utah
EPA puts Emery County in Zone 2, its middle radon zone, and 38.5% of its 39 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
Share at 4+ pCi/L
38.5%
2.4 pts above UT
- Emery
- 38.5%
- Utah
- 36.1%
39 tests, 2023
Median result
2.7pCi/L
Below action level
- Emery
- 2.7 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2023
Tests reported
39
22nd of 22 by tests
- Emery
- 39
- Salt Lake
- 9,658
Reported to CDC before any fix, 2023
EPA radon zone
Zone 2
Moderate potential
- 1
- Zone 2
- 3
1 highest, 3 lowest
EPA predicts 2 to 4 pCi/L indoors
Rank in Utah
14 of 22
Middle half
- Emery
- 38.5%
- Beaver
- 66.7%
By share, of 22 with 30+ tests
Read a result for Emery County
Starts at Emery County's median, 2.7 pCi/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
- Under 20 to 1.9 pCi/L
- 2 to 4consider a fix
- 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. Emery County's median reported result, 2023.
The data
Emery County, At a glance
Emery County at a glance
Predicted: EPA radon zone
EPA Zone 2: moderate predicted potential
Emery County is a
USGS geologic potential: Moderate across 56% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Emery County, 2023
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2014 | 66.7% |
| 2015 | 50.0% |
| 2016 | 25.0% |
| 2018 | 0.0% |
| 2020 | 0.0% |
| 2021 | 68.8% |
| 2022 | 32.2% |
| 2023 | 38.5% |
2023: 38.5%. Across these years the share ran from 0.0% to 68.8%. Each column counts radon tests reported to CDC that year, not homes.
What these figures count
These are the 39 tests reported to CDC for Emery 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).
Emery County, Compared
Emery County radon figures, compared
Calculated by Radon411In Emery County, about 4 in 10 reported tests in 2023 (15 of 39) were at or above EPA's action level. Against the national pool of 33.4%, the gap is 5.1 points higher. Across 29 Utah counties pooled together, 36.1% of tests reached that level, so Emery County runs 2.4 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 60.0% (Sanpete County). By share, Emery County is 14th of 22 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 28.3 pCi/L. Below the action level, 15 tests (38.5%) came in under 2 pCi/L, against 35.4% statewide, and 9 tests (23.1%) fell between 2 and 4, against 28.5% statewide.
Zone 2 on EPA's map (predicted average between 2 and 4 pCi/L) and a 38.5% share point the same way here. USGS geology rates 56% of the county's land moderate radon potential.
The busiest year on file was 2022, with 177 tests reported; the quietest, 2020, had 1.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Emery County, Geology
The ground under Emery County
PredictedUSGS's geologic map splits Emery County: 56.3% of its land is moderate radon potential and 43.7% high. The map puts 56.3% of Emery County in the area it calls Colorado Plateau and 34.4% in Mancos Shale Lowlands, with 2 smaller areas beside them. 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).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Colorado Plateau | Paleozoic and Mesozoic sandstone, shale, limestone. | Moderate | 9 | 56.3% |
| Mancos Shale Lowlands | Marine rocks of the Mancos shale. | High | 13 | 34.4% |
| Northern High Plateau | Tertiary and Cretaceous sedimentary rocks. | High | 12 | 4.7% |
| Uinta Basin | Uranium-bearing Tertiary sandstone and siltstone. | High | 13 | 4.6% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Emery County beside the ground around it
Emery County has more high-potential ground than Utah as a whole: 43.7% of its land against 32.8%. Of the 7 counties that border it, 5 have more high-potential ground, Carbon County the most at 100%.
The map rates the ground, not the air in any home.
Local help
Emery County, Local resources
Radon testing and mitigation in Emery County
- Indoor Radon ProgramIndoor Radon Program, run by Utah Department of Environmental Quality, states the rule for disclosing radon when a home is sold, and answers questions about testing and mitigation in Utah.Visit the program’s page(opens in a new tab)
- Free and low-cost kitsAsk the program whether it has free or discounted kits, or compare kits you can buy.
- Compare kits
- See the Utah directoryNo professionals are listed in Utah yet. The state program can point you to registered testers and mitigators.
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
Emery County, Questions
Questions about radon in Emery County
Are radon levels high in Emery County?
In 2023, 38.5% of the radon tests reported to CDC for Emery County, Utah were at or above 4 pCi/L, and the median reported pre-mitigation result was 2.7 pCi/L. Of 22 Utah counties with 30 or more tests for the same period, 13 reported a higher share; pooled, the state comes to 36.1%.
Which counties border Emery County?
Emery County borders 7 counties: Carbon County, Sanpete County, Wayne County, Sevier County, Grand County, Uintah County and San Juan County.
Products
Emery County, Products
Testing a home in Emery County
In Emery County, 38.5% of 39 tests reported to CDC in 2023 reached 4 pCi/L, against 36.1% pooled across Utah. In Zone 2 a short-term kit (2 to 90 days) is the quick first check in Emery County; a long-term test tells the year-round average.
Test kits and monitors3
See every kit and monitor
Long-term kit
RL116 long-term radon test kit
- Lab fee extra
Method: Alpha track
In home: 90 days to 12 months
Monitor
View Plus radon and air quality monitor
- C-NRPP 2024/25: Approved
- Battery
- Wi-Fi, Bluetooth
- Screen, app
Method: Alpha spectrometry
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Emery County, Bordering counties
Counties bordering Emery County
Calculated by Radon411- Radon levels in Wayne CountyEPA zone 2
70.4%at or above 4 pCi/L
Median 5.5 pCi/L · 27 tests · 31.9 points above Emery County
- Radon levels in Sanpete CountyEPA zone 1
60.0%at or above 4 pCi/L
Median 4.6 pCi/L · 150 tests · 21.5 points above Emery County
- Radon levels in Sevier CountyEPA zone 1
57.4%at or above 4 pCi/L
Median 4.9 pCi/L · 101 tests · 18.9 points above Emery County
- Radon levels in San Juan CountyEPA zone 2
52.6%at or above 4 pCi/L
Median 4.0 pCi/L · 19 tests · 14.1 points above Emery County
- Radon levels in Uintah CountyEPA zone 1
51.0%at or above 4 pCi/L
Median 4.2 pCi/L · 104 tests · 12.5 points above Emery County
- Radon levels in Grand CountyEPA zone 1
23.9%at or above 4 pCi/L
Median 1.9 pCi/L · 46 tests · 14.6 points below Emery County
- Radon levels in Carbon CountyEPA zone 1
23.2%at or above 4 pCi/L
Median 2.3 pCi/L · 69 tests · 15.3 points below Emery County
Emery County, Cities and towns
Cities and towns in Emery County
The Census Bureau estimates 10,177 residents in Emery County for July 1, 2025, 333 more than in 2020 (+3.4%). Spread over its land, that is 2.3 people to the square mile. No town dominates: Huntington, the largest, has 1,986 residents, 19.5% of the total. Together its 9 incorporated places hold 84.9% of those residents; the other 15.1% live outside any of them. Reported testing is thin here: 39 tests over 2023, or 3.8 for every 1,000 residents (2025 estimate), where Utah as a whole comes to 7.7.
From Huntington to Clawson, CDC publishes no figure by town: each reads Emery County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Huntington | 1,986 | +3.3% | 19.5% |
| Castle Dale | 1,547 | +3.4% | 15.2% |
| Ferron | 1,522 | +3.3% | 15.0% |
| Orangeville | 1,271 | +3.1% | 12.5% |
| Green River | 888 | +3.9% | 8.7% |
| Cleveland | 515 | +3.2% | 5.1% |
| Elmo | 421 | +3.7% | 4.1% |
| Emery | 321 | +3.5% | 3.2% |
| Clawson | 169 | +3.7% | 1.7% |
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).
Emery County, Homes
Homes in Emery County
Emery County is a place of houses on their own lots: 80% of its 4,099 homes are detached single-family houses, against 67% across Utah. The homes are older than Utah's as a whole: half were built before 1978 (1991 for Utah), and 19% date from before 1960. Owners live in 80% of the occupied homes (Utah: 71%), so for most households a test and a fix are their own to order.
| Homes | Emery County | Utah |
|---|---|---|
| Housing units | 4,099 | 1,193,082 |
| Detached houses | 80% | 67% |
| In buildings of 5 or more | 2% | 16% |
| Mobile homes | 13% | 3% |
| Built before 1960 | 19% | 16% |
| Built since 2000 | 10% | 37% |
| Middle year built | 1978 | 1991 |
| Owner-occupied | 80% | 71% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.