Short-term kit
RA400 short-term liquid scintillation radon test kit, lab fee included
- Lab fee included
Method: Liquid scintillation
In home: 48 to 96 hours
Locations and reports
Radon Levels in Cullman County, Alabama
EPA puts Cullman County in Zone 2, its middle radon zone, and most reported tests there come back low, though 11.4% of 79 (2008 to 2017, laboratory totals) reached 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
11.4%
10.5 pts below AL
- Cullman
- 11.4%
- Alabama
- 21.9%
79 tests, 2008 to 2017
Median result
1.5pCi/L
Below action level
- Cullman
- 1.5 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2008 to 2017
Tests reported
79
18th of 27 by tests
- Cullman
- 79
- Madison
- 5,178
Reported to CDC before any fix, 2008 to 2017
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 Alabama
20 of 27
Middle half
- Cullman
- 11.4%
- Colbert
- 36.2%
By share, of 27 with 30+ tests
Read a result for Cullman County
Starts at Cullman County's median, 1.5 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 1.5 pCi/L
Below 2 pCi/L
- Under 20 to 1.9 pCi/L
- 2 to 4consider a fix
- 4 and aboveEPA says fix it
This result is below 2 pCi/L, the level at which EPA says a fix should be considered. Cullman County's median reported result, 2008 to 2017.
The data
Cullman County, At a glance
Cullman County at a glance
Predicted: EPA radon zone
EPA Zone 2: moderate predicted potential
Cullman County is a
USGS geologic potential: Moderate across 100% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Cullman County, 2008 to 2017, laboratory
Under 2 pCi/L: 60%2 to 4 pCi/L: 29%4 pCi/L and above: 11%
Of 79 pre-mitigation tests reported to CDC, not homes in this area.
| Result band | Tests Measured | Share Measured |
|---|---|---|
| Under 2 pCi/L | 47 | 59.5% |
| 2 to 4 pCi/L | 23 | 29.1% |
| 4 pCi/L and above | 9 | 11.4% |
What these figures count
These are the 79 tests reported to CDC for Cullman County over 2008 to 2017 (laboratory totals), 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: 2008 to 2017, laboratory. Measured data period: 2005 to 2017 (every CDC figure on file).
Cullman County, Compared
Cullman County radon figures, compared
Calculated by Radon411Cullman County reports fewer high tests than Alabama overall. 11.4% of its 79 tests over the 2008 to 2017 laboratory totals were at or above 4 pCi/L. That is 10.5 points below the 21.9% pooled from 65 Alabama counties.
Ordered from highest share down, it comes 20th of 27 Alabama counties with 30 or more tests for the same period. Nationally, every county with a figure for the same period pools to 35.7%; Cullman County sits 24.3 points below it.
Next door, the shares run from 13.6% in Blount County to 16.2% in Lawrence County. Zone 2 on EPA's map (predicted average between 2 and 4 pCi/L) and a 11.4% share point the same way here.
Half the tests came in under 1.5 pCi/L and half over it; the single highest reached 9.1 pCi/L. The rest split 59.5% under 2 pCi/L and 29.1% from 2 to 4 (Alabama: 54.3% and 23.8%).
CDC's ten-year totals for Cullman County went from 121 tests (2005 to 2014) to 79 (2008 to 2017), the share going from 5.8% to 11.4%.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Cullman County, Geology
The ground under Cullman County
PredictedUSGS's geologic map puts all of Cullman County's mapped land in one class: moderate radon potential. All of it lies in the area the map calls Appalachian Plateau, to which USGS gives a radon index of 9, in the moderate band (9 to 11).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Appalachian Plateau | Limestone, sandstone, carbonaceous shale, coal | Moderate | 9 | 100% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Cullman County beside the ground around it
Across Alabama 14.3% of the land is rated high; none of Cullman County's is. Of the 6 counties that border it, 3 have more high-potential ground, Morgan County the most at 76.5%.
The map rates the ground, not the air in any home.
Local help
Cullman County, Local resources
Radon testing and mitigation in Cullman County
- Alabama Radon ProgramAlabama Radon Program, run by Alabama Department of Public Health, answers questions about testing, mitigation and the rules in Alabama.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 Alabama directoryNo professionals are listed in Alabama yet. The state program can point you to registered testers and mitigators.
What Alabama's program says
- Phone
- (334) 290-6244
What it means
Cullman County, Questions
Questions about radon in Cullman County
Are radon levels high in Cullman County?
Over the 2008 to 2017 laboratory totals, 11.4% of the radon tests reported to CDC for Cullman County, Alabama were at or above 4 pCi/L, and the median reported pre-mitigation result was 1.5 pCi/L. Of 27 Alabama counties with 30 or more tests for the same period, 19 reported a higher share; pooled, the state comes to 21.9%.
Which counties border Cullman County?
Cullman County borders 6 counties: Blount County, Morgan County, Winston County, Walker County, Lawrence County and Marshall County.
Products
Cullman County, Products
Testing a home in Cullman County
In Cullman County, 11.4% of 79 tests reported to CDC over the 2008 to 2017 laboratory totals reached 4 pCi/L, against 21.9% pooled across Alabama. In Zone 2 a short-term kit (2 to 90 days) is the quick first check in Cullman County; a long-term test tells the year-round average.
Test kits and monitors3
See every kit and monitor
Long-term kit
RL416 long-term radon test kit, lab fee included
- Lab fee included
Method: Alpha track
In home: 90 days to 12 months
Monitor
RadonPro Wi-Fi radon monitor with a built-in Geiger counter
- C-NRPP 2024/25: Not included
- Plug-in
- Wi-Fi
- Alarm
- Screen, app
First reading: Within 5 minutes
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Cullman County, Bordering counties
Counties bordering Cullman County
Calculated by Radon411- Radon levels in Walker CountyEPA zone 2
33.3%at or above 4 pCi/L
Median 1.4 pCi/L · 15 tests · 21.9 points above Cullman County
- Radon levels in Winston CountyEPA zone 2
16.7%at or above 4 pCi/L
Median 1.6 pCi/L · 12 tests · 5.3 points above Cullman County
- Radon levels in Lawrence CountyEPA zone 1
16.2%at or above 4 pCi/L
Median 1.7 pCi/L · 154 tests · 4.8 points above Cullman County
- Radon levels in Marshall CountyEPA zone 2
15.1%at or above 4 pCi/L
Median 1.3 pCi/L · 199 tests · 3.7 points above Cullman County
- Radon levels in Morgan CountyEPA zone 1
14.6%at or above 4 pCi/L
Median 1.4 pCi/L · 453 tests · 3.2 points above Cullman County
- Radon levels in Blount CountyEPA zone 2
13.6%at or above 4 pCi/L
Median 2.0 pCi/L · 44 tests · 2.2 points above Cullman County
Cullman County, Cities and towns
Cities and towns in Cullman County
Cullman County is growing: the Census Bureau puts it at 94,009 residents on July 1, 2025, up 6.7% from 88,128 in 2020. That works out to 128 people per square mile of land. Its largest town, Cullman, has 20,799 residents, 22.1% of the total. Reported testing is thin here: 79 tests over 2008 to 2017, or 0.8 for every 1,000 residents (2025 estimate), where Alabama as a whole comes to 2.4.
From Cullman to Colony, CDC publishes no figure by town: each reads Cullman County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Cullman | 20,799 | +12.6% | 22.1% |
| Arabextends beyond Cullman County | 9,061 | +7.3% | Counted whole |
| Hanceville | 3,390 | +5.9% | 3.6% |
| Good Hope | 2,682 | +7.4% | 2.9% |
| Holly Pond | 884 | +3.6% | 0.9% |
| Baileyton | 701 | +8.2% | 0.7% |
| West Point | 658 | +6.0% | 0.7% |
| South Vinemont | 606 | +7.8% | 0.6% |
| Dodge City | 569 | +4.6% | 0.6% |
| Fairview | 545 | +4.0% | 0.6% |
| Garden Cityextends beyond Cullman County | 545 | +3.2% | Counted whole |
| Berlin | 541 | +7.1% | 0.6% |
- Colony
13 incorporated places, as listed in the U.S. Census Bureau’s 2020 place reference files. “(part)” marks a place that extends into another county. Residents: U.S. Census Bureau population estimates for July 1, 2025 (Vintage 2025). A place that extends beyond Cullman County is counted whole, so it has no share.
Cullman County, Homes
Homes in Cullman County
Of Cullman County's 39,538 homes, 70% are detached houses, against 69% across Alabama; 21% are mobile homes. Half of its homes were built before 1985, close to Alabama's 1985: 14% date from before 1960 and 24% from 2000 or later. Owners live in 76% of the occupied homes (Alabama: 70%), so for most households a test and a fix are their own to order.
| Homes | Cullman County | Alabama |
|---|---|---|
| Housing units | 39,538 | 2,316,192 |
| Detached houses | 70% | 69% |
| In buildings of 5 or more | 4% | 12% |
| Mobile homes | 21% | 13% |
| Built before 1960 | 14% | 16% |
| Built since 2000 | 24% | 27% |
| Middle year built | 1985 | 1985 |
| Owner-occupied | 76% | 70% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.