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Radon Levels in Weber County, Utah

EPA puts Weber County in Zone 2, its middle radon zone, and 28.6% of its 1,669 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

    28.6%

    7.5 pts below UT

    Weber
    28.6%
    Utah
    36.1%

    1,669 tests, 2023

  • Median result

    2.1pCi/L

    Below action level

    Weber
    2.1 pCi/L
    EPA
    4.0 pCi/L

    Midpoint of the tests, 2023

  • Tests reported

    1,669

    4th of 22 by tests

    Weber
    1,669
    Salt Lake
    9,658

    Reported to CDC before any fix, 2023

  • 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 22

    Middle half

    Weber
    28.6%
    Beaver
    66.7%

    By share, of 22 with 30+ tests

Read a result for Weber County

Starts at Weber County's median, 2.1 pCi/L

2.1pCi/L

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

EPA’s reading of 2.1 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. Weber County's median reported result, 2023.

Interpret this readingWhat a fix costs

The data

Weber County, At a glance

Weber County at a glance

Predicted: EPA radon zone

EPA Zone 2: moderate predicted potential

Weber 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 57% of the county's area

Predicted: EPA Map of Radon Zones

Measured: tests reported to CDC

Radon tests reported for Weber County, 2023

Share of reported tests at or above 4 pCi/L, by year, Weber County
Share of reported tests at or above 4 pCi/L, by year, Weber County
YearShare of reported tests at or above 4 pCi/L
201437.3%
201533.3%
201636.4%
201736.3%
201833.5%
201928.3%
202029.6%
202127.7%
202230.1%
202328.6%

2023: 28.6%. Across these years the share ran from 27.7% to 37.3%. Each column counts radon tests reported to CDC that year, not homes.

What these figures count

These are the 1,669 tests reported to CDC for Weber 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

Weber County, Compared

Weber County radon figures, compared

Calculated by Radon411

Weber County's 1,669 reported tests in 2023 had a middle value of 2.1 pCi/L and a maximum of 430.8 pCi/L, and 28.6% reached 4 pCi/L. Utah as a whole (29 Utah counties, pooled) comes to 36.1%: 7.5 points higher than here.

Among its state's counties it ranks 17th of 22 Utah counties with 30 or more tests for the same period. Statewide for the same period, Beaver County reported the highest share (66.7%) and Washington County the lowest (9.9%).

Below the action level, 797 tests (47.8%) came in under 2 pCi/L, against 35.4% statewide, and 395 tests (23.7%) fell between 2 and 4, against 28.5% statewide. The busiest year on file was 2022, with 2,319 tests reported; the quietest, 2019, had 184.

EPA's 1993 zone map puts Weber County in Zone 2, a predicted county average between 2 and 4 pCi/L. USGS geology rates 57% of the county's land moderate radon potential.

Next door, the shares run from 28.4% in Davis County to 59.4% in Morgan County, with Davis County below Weber County. Over 10 years of annual figures the share fell 8.7 points, from 37.3% in 2014 to 28.6% in 2023; its peak was 37.3% in 2014.

CDC also counts 146 tests taken after mitigation in Weber County for the same period: tests in homes where a fix was already in.

Share of reported tests at or above 4 pCi/L by year, Weber County against Utah2014 to 2023, years with 30 or more tests: Weber County 37.3% to 28.6%, the state's pooled share 36.1% in 2023.
Weber CountyUtah, pooled
Share of reported tests at or above 4 pCi/L by year, Weber County against Utah: data table
YearTestsWeber County, at or above 4 pCi/LUtah, pooled
201420937.3%43.4%
201527633.3%42.3%
201637436.4%39.8%
201725636.3%38.2%
201820633.5%36.6%
201918428.3%37.7%
202023329.6%37.6%
202119527.7%34.2%
20222,31930.1%37.7%
20231,66928.6%36.1%
Weber County against Utah, the United States and nearby counties, 2023
AreaTestsAt or above 4 pCi/LMedianDifference from Weber County
Weber County1,66928.6%2.1 pCi/LThis county
Utah, pooled29 counties, pooled27,42236.1%Not pooled+7.5 points
United States, pooled642 counties, pooled128,74033.4%Not pooled+4.8 points
Beaver Countyhighest in the state4266.7%9.3 pCi/L+38.1 points
Washington Countylowest in the state6579.9%1.3 pCi/L−18.7 points
Morgan County, UTborders it20759.4%5.0 pCi/L+30.8 points
Box Elder County, UTborders it44957.9%4.9 pCi/L+29.3 points
Cache County, UTborders it99453.8%4.4 pCi/L+25.2 points
Rich County, UTborders it1353.8%4.8 pCi/L+25.2 points
Tooele County, UTborders it57351.0%4.1 pCi/L+22.4 points
Davis County, UTborders it3,59428.4%2.4 pCi/L−0.2 points
Where Weber County's reported results fell, 2023, beside Utah and the United States
ResultWeber County testsWeber County shareUtah shareU.S. shareAgainst Utah
Under 2 pCi/L79747.8%35.4%41.4%+12.4 points
2 to 4 pCi/L39523.7%28.5%25.2%−4.8 points
4 pCi/L and above47728.6%36.1%33.4%−7.5 points
Weber 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
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
Grand County19 of 224623.9%1.9 pCi/L
Carbon County20 of 226923.2%2.3 pCi/L
Iron County21 of 2221321.1%2.1 pCi/L
Washington County22 of 226579.9%1.3 pCi/L
Weber County radon tests by year, against Utah's pooled share
YearTestsAt or above 4 pCi/LMedianHighestUtah, pooledChange from the row before
20231,66928.6%2.1 pCi/L430.8 pCi/L36.1%−1.5 points
20222,31930.1%2.2 pCi/L80.5 pCi/L37.7%+2.4 points
202119527.7%2.2 pCi/L47.2 pCi/L34.2%−1.9 points
202023329.6%2.3 pCi/L62.8 pCi/L37.6%+1.3 points
201918428.3%2.6 pCi/L56.2 pCi/L37.7%−5.2 points
201820633.5%2.5 pCi/L98.4 pCi/L36.6%−2.8 points
201725636.3%2.3 pCi/L101.2 pCi/L38.2%−0.1 points
201637436.4%2.3 pCi/L115.9 pCi/L39.8%+3.1 points
201527633.3%2.5 pCi/L30.1 pCi/L42.3%−4.0 points
201420937.3%2.7 pCi/L24.6 pCi/L43.4%First on file

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

Weber County, Geology

The ground under Weber County

Predicted

USGS's geologic map splits Weber County: 56.7% of its land is moderate radon potential and 43.3% high. The map puts 42.5% of Weber County in the area it calls Basin and Range and 22.2% in Wasatch Range, with 2 smaller areas beside them. USGS gives the first a radon index of 11, in the moderate band (9 to 11), and the second 14, in the high band (12 to 17).

USGS's geologic areas under Weber County
AreaThe rock, in USGS's wordsPotentialRadon indexShare of land
Basin and RangeQuaternary sedimentary and igneous rocks.Moderate1142.5%
Wasatch RangePrecambrian granite and gneiss and Tertiary igneous rocks that have relatively low uranium concentrations.High1422.2%
Northern Rocky MountainsTertiary sandstone, mudstone, limestone.High1321.1%
Basin and RangeCenozoic to Paleozoic sedimentary rocks.Moderate1114.1%

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

Weber County beside the ground around it

Weber County has more high-potential ground than Utah as a whole: 43.3% of its land against 32.8%. Of the 6 counties that border it, 3 have more high-potential ground, Morgan County the most at 99.7%.

Share of land by USGS radon potential: Weber County, the 6 counties bordering it and Utah
AreaEPA zoneLow potentialModerate potentialHigh potential
Weber CountyZone 2None56.7%43.3%
Morgan CountyZone 2None0.3%99.7%
Davis CountyZone 2None85.9%14.1%
Cache CountyZone 2None55.3%44.7%
Rich CountyZone 2None33.3%66.7%
Box Elder CountyZone 2None97.4%2.6%
Tooele CountyZone 2None100%None
Utah29 counties, pooled by land areaVariesNone67.2%32.8%

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

Local help

Weber County, Local resources

Radon testing and mitigation in Weber 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

Weber County, Questions

Questions about radon in Weber County

Are radon levels high in Weber County?

In 2023, 28.6% of the radon tests reported to CDC for Weber County, Utah were at or above 4 pCi/L, and the median reported pre-mitigation result was 2.1 pCi/L. Of 22 Utah counties with 30 or more tests for the same period, 16 reported a higher share; pooled, the state comes to 36.1%.

Which counties border Weber County?

Weber County borders 6 counties: Morgan County, Davis County, Cache County, Rich County, Box Elder County and Tooele County.

Products

Weber County, Products

Testing a home in Weber County

In Weber County, 28.6% of 1,669 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 Weber County; a long-term test tells the year-round average.

Test kits and monitors3

See every kit and monitor

Best radon monitors for Weber County homes, compared

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Weber County, Bordering counties

Counties bordering Weber County

Calculated by Radon411

Weber County, Cities and towns

Cities and towns in Weber County

Weber County is growing: the Census Bureau puts it at 278,174 residents on July 1, 2025, up 5.8% from 262,989 in 2020. That works out to 483 people per square mile of land. Its largest town, Ogden, has 89,510 residents, 32.2% of the total. Together its 15 incorporated places hold 94.1% of those residents; the other 5.9% live outside any of them. CDC's 1,669 reported tests for 2023 work out to 6.0 per 1,000 residents (2025 estimate), close to Utah's 7.7.

From Ogden to Huntsville, CDC publishes no figure by town: each reads Weber County's.

The 12 largest cities and towns in Weber County by residents, July 1, 2025
PlaceResidentsSince 2020Share of residents
Ogden89,510+2.5%32.2%
Roy38,794−1.4%13.9%
West Haven25,627+49.2%9.2%
North Ogden21,689+3.8%7.8%
South Ogden17,710+1.2%6.4%
Pleasant View11,423+2.9%4.1%
Hooper9,741+7.0%3.5%
Plain City9,256+16.4%3.3%
Riverdale9,206−1.9%3.3%
Washington Terrace9,075−2.1%3.3%
Farr West8,163+5.8%2.9%
Harrisville7,154+1.0%2.6%
  • Marriott-Slaterville
  • Uintah
  • Huntsville

15 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).

Weber County, Homes

Homes in Weber County

Of Weber County's 98,595 homes, 71% are detached houses, against 67% across Utah; 13% are in buildings of five or more homes. The homes are older than Utah's as a whole: half were built before 1983 (1991 for Utah), and 25% date from before 1960. 75% 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 Weber County, Utah, 2019 to 2023
HomesWeber CountyUtah
Housing units98,5951,193,082
Detached houses71%67%
In buildings of 5 or more13%16%
Mobile homes3%3%
Built before 196025%16%
Built since 200028%37%
Middle year built19831991
Owner-occupied75%71%

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