Short-term kit
PicoCan short-term charcoal canister radon test
- Lab fee included
Method: Charcoal
In home: 48 to 96 hours
Locations and reports
Radon Levels in Blount County, Alabama
EPA puts Blount County in Zone 2, its middle radon zone, and most reported tests there come back low, though 13.6% of 44 (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
13.6%
8.3 pts below AL
- Blount
- 13.6%
- Alabama
- 21.9%
44 tests, 2008 to 2017
Median result
2.0pCi/L
Below action level
- Blount
- 2.0 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2008 to 2017
Tests reported
44
23rd of 27 by tests
- Blount
- 44
- 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
17 of 27
Middle half
- Blount
- 13.6%
- Colbert
- 36.2%
By share, of 27 with 30+ tests
Read a result for Blount County
Starts at Blount County's median, 2.0 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 2.0 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. Blount County's median reported result, 2008 to 2017.
The data
Blount County, At a glance
Blount County at a glance
Predicted: EPA radon zone
EPA Zone 2: moderate predicted potential
Blount 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 Blount County, 2008 to 2017, laboratory
Under 2 pCi/L: 50%2 to 4 pCi/L: 36%4 pCi/L and above: 14%
Of 44 pre-mitigation tests reported to CDC, not homes in this area.
| Result band | Tests Measured | Share Measured |
|---|---|---|
| Under 2 pCi/L | 22 | 50.0% |
| 2 to 4 pCi/L | 16 | 36.4% |
| 4 pCi/L and above | 6 | 13.6% |
What these figures count
These are the 44 tests reported to CDC for Blount 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).
Blount County, Compared
Blount County radon figures, compared
Calculated by Radon411Blount County reports fewer high tests than Alabama overall. 13.6% of its 44 tests over the 2008 to 2017 laboratory totals were at or above 4 pCi/L. That is 8.3 points below the 21.9% pooled from 65 Alabama counties.
Ordered from highest share down, it comes 17th 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%; Blount County sits 22.1 points below it.
Next door, the shares run from 10.7% in Jefferson County to 19.6% in Etowah County, with Cullman County and Jefferson County below Blount County. Zone 2 on EPA's map (predicted average between 2 and 4 pCi/L) and a 13.6% share point the same way here.
Half the tests came in under 2.0 pCi/L and half over it; the single highest reached 28.3 pCi/L. The rest split 50.0% under 2 pCi/L and 36.4% from 2 to 4 (Alabama: 54.3% and 23.8%).
CDC's ten-year totals for Blount County went from 31 tests (2005 to 2014) to 44 (2008 to 2017), the share going from 19.4% to 13.6%.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Blount County, Geology
The ground under Blount County
PredictedUSGS's geologic map puts all of Blount County's mapped land in one class: moderate radon potential. The map puts 67.3% of Blount County in the area it calls Appalachian Plateau and 32.7% in Valley and Ridge. USGS gives both 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 | 67.3% |
| Valley and Ridge | Chattanooga black shale, Cambrian-Ordovician limestone and sandstone. | Moderate | 9 | 32.7% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Blount County beside the ground around it
Across Alabama 14.3% of the land is rated high; none of Blount County's is. Of the 6 counties that border it, 1 has more high-potential ground, Marshall County the most at 43.8%.
The map rates the ground, not the air in any home.
Local help
Blount County, Local resources
Radon testing and mitigation in Blount 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
Blount County, Questions
Questions about radon in Blount County
Are radon levels high in Blount County?
Over the 2008 to 2017 laboratory totals, 13.6% of the radon tests reported to CDC for Blount County, Alabama were at or above 4 pCi/L, and the median reported pre-mitigation result was 2.0 pCi/L. Of 27 Alabama counties with 30 or more tests for the same period, 16 reported a higher share; pooled, the state comes to 21.9%.
Which counties border Blount County?
Blount County borders 6 counties: Cullman County, St. Clair County, Marshall County, Etowah County, Jefferson County and Walker County.
Products
Blount County, Products
Testing a home in Blount County
In Blount County, 13.6% of 44 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 Blount 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
MonitorX-Sense
XR0A-SR battery digital radon detector with a screen
- C-NRPP 2024/25: Not included
- Battery
- Screen
Method: Alpha spectrometry
First reading: Within 24 hours
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Blount County, Bordering counties
Counties bordering Blount 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 · 19.7 points above Blount County
- Radon levels in Etowah CountyEPA zone 2
19.6%at or above 4 pCi/L
Median 1.4 pCi/L · 56 tests · 6.0 points above Blount County
- Radon levels in Marshall CountyEPA zone 2
15.1%at or above 4 pCi/L
Median 1.3 pCi/L · 199 tests · 1.5 points above Blount County
- Radon levels in St. Clair CountyEPA zone 2
14.0%at or above 4 pCi/L
Median 1.2 pCi/L · 93 tests · 0.4 points above Blount County
- Radon levels in Cullman CountyEPA zone 2
11.4%at or above 4 pCi/L
Median 1.5 pCi/L · 79 tests · 2.2 points below Blount County
- Radon levels in Jefferson CountyEPA zone 2
10.7%at or above 4 pCi/L
Median 1.2 pCi/L · 912 tests · 2.9 points below Blount County
Blount County, Cities and towns
Cities and towns in Blount County
The Census Bureau estimates 60,156 residents in Blount County for July 1, 2025, 1,057 more than in 2020 (+1.8%). That works out to 93 people per square mile of land. No town dominates: Oneonta, the largest, has 7,022 residents, 11.7% of the total. Reported testing is thin here: 44 tests over 2008 to 2017, or 0.7 for every 1,000 residents (2025 estimate), where Alabama as a whole comes to 2.4.
From Oneonta to County Line, CDC publishes no figure by town: each reads Blount County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Oneonta | 7,022 | +1.2% | 11.7% |
| Blountsville | 1,816 | −0.5% | 3.0% |
| Hayden | 1,333 | +1.2% | 2.2% |
| Cleveland | 1,262 | +2.0% | 2.1% |
| Locust Fork | 1,234 | +2.1% | 2.1% |
| Snead | 1,052 | +1.2% | 1.7% |
| Altoonaextends beyond Blount County | 948 | Level | Counted whole |
| Susan Moore | 808 | +2.8% | 1.3% |
| Traffordextends beyond Blount County | 597 | −4.2% | Counted whole |
| Allgood | 557 | +3.3% | 0.9% |
| Garden Cityextends beyond Blount County | 545 | +3.2% | Counted whole |
| Highland Lake | 429 | +3.9% | 0.7% |
- Rosa
- Nectar
- County Line (part)
15 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 Blount County is counted whole, so it has no share.
Blount County, Homes
Homes in Blount County
Of Blount County's 24,793 homes, 70% are detached houses, against 69% across Alabama; 24% are mobile homes. Half of its homes were built before 1989, close to Alabama's 1985: 14% date from before 1960 and 27% from 2000 or later. Owners live in 80% of the occupied homes (Alabama: 70%), so for most households a test and a fix are their own to order.
| Homes | Blount County | Alabama |
|---|---|---|
| Housing units | 24,793 | 2,316,192 |
| Detached houses | 70% | 69% |
| In buildings of 5 or more | 2% | 12% |
| Mobile homes | 24% | 13% |
| Built before 1960 | 14% | 16% |
| Built since 2000 | 27% | 27% |
| Middle year built | 1989 | 1985 |
| Owner-occupied | 80% | 70% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.