Short-term kit
RA100 short-term liquid scintillation radon test kit
- Lab fee extra
Method: Liquid scintillation
In home: 48 to 96 hours
Locations and reports
Radon Levels in Alamance County, North Carolina
EPA puts Alamance County in Zone 3, its lowest radon zone, and only 5 radon tests from it are on file with CDC (2022). Homes with elevated levels occur in all three zones, so only a test measures yours.
Data checked By Radon411Methodology
Share at 4+ pCi/L
3.7%
18.9 pts below NC
- Alamance
- 3.7%
- NC
- 22.6%
520 tests, 2008 to 2017
Median result
0.5pCi/L
Below action level
- Alamance
- 0.5 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2008 to 2017
Tests reported
520
34th of 75 by tests
- Alamance
- 520
- Wake
- 9,694
Reported to CDC before any fix, 2008 to 2017
EPA radon zone
Zone 3
Lower potential
- 1
- 2
- Zone 3
1 highest, 3 lowest
EPA predicts under 2 pCi/L indoors
Rank in NC
62 of 75
Lowest quarter
- Alamance
- 3.7%
- Transylvania
- 47.8%
By share, of 75 with 30+ tests
Read a result for Alamance County
Starts at Alamance County's median, 0.5 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 0.5 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. Alamance County's median reported result, 2008 to 2017.
The data
Alamance County, At a glance
Alamance County at a glance
Predicted: EPA radon zone
EPA Zone 3: lower predicted potential
USGS geologic potential: Low across 100% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Alamance County, 2022
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2014 | 8.4% |
| 2020 | 3.0% |
| 2021 | 0.0% |
| 2022 | 0.0% |
2022: 0.0%. Across these years the share ran from 0.0% to 8.4%. Each column counts radon tests reported to CDC that year, not homes.
What these figures count
Only 5 tests were reported to CDC for Alamance County over 2022, and tests are often run on homes being sold or already suspected of a problem: so few describe neither the county nor this house.
Measured: CDC tracking data. Figure above: 2022. Measured data period: 2005 to 2022 (every CDC figure on file).
Alamance County, Compared
Alamance County radon figures, compared
Calculated by Radon411Only 19 of 520 radon tests reported for Alamance County over the 2008 to 2017 laboratory totals reached 4 pCi/L (3.7%). The median result, 0.5 pCi/L, sits below 2, well under EPA's 4 pCi/L action level, and the top reported result was 24.0 pCi/L.
The newest figure, in 2022, counts only 5 tests (0.0% at or above 4 pCi/L), too few to compare, so this reading uses the 520-test figure.
Across 99 North Carolina counties pooled together, 22.6% of tests reached that level, so Alamance County runs 18.9 points below its state. Against the national pool of 35.7%, the gap is 32.0 points lower. Its place in the state: 62nd of 75 North Carolina counties with 30 or more tests for the same period.
Zone 3 on EPA's map (predicted average under 2 pCi/L) and a 3.7% share point the same way here. Of 6 neighbours with a figure, all 6 reported a larger share at or above 4 pCi/L; the spread is 7.1% (Randolph County) to 27.3% (Rockingham County).
Below the action level, 456 tests (87.7%) came in under 2 pCi/L, against 55.6% statewide, and 45 tests (8.7%) fell between 2 and 4, against 21.8% statewide. Over 3 years of annual figures the share fell 8.4 points, from 8.4% in 2014 to 0.0% in 2021; its peak was 8.4% in 2014. USGS geology rates 100% of the county's land low radon potential.
The busiest year on file was 2020, with 101 tests reported; the quietest, 2022, had 5.
Alamance CountyNorth Carolina, pooled
0.0% % of tests14.9% % of tests
| Year | Tests | Alamance County, at or above 4 pCi/L | North Carolina, pooled |
|---|---|---|---|
| 2014 | 95 | 8.4% | 21.9% |
| 2020 | 101 | 3.0% | 21.1% |
| 2021 | 56 | 0.0% | 14.9% |
Pooled shares: Radon411's sum of CDC's county counts for one period.
Alamance County, Geology
The ground under Alamance County
PredictedUSGS's geologic map puts all of Alamance County's mapped land in one class: low radon potential. All of it lies in the area the map calls Carolina Slate Belt, to which USGS gives a radon index of 6, in the low band (5 to 8).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Carolina Slate Belt | Felsic metavolcanics, intermediate volcanics, metamudstone, argillite, and epiclastic rocks. | Low | 6 | 100% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Alamance County beside the ground around it
Across North Carolina 1.3% of the land is rated high; none of Alamance County's is. Of the 6 counties that border it, 4 have more moderate-potential ground, Rockingham County the most at 80.7%.
The map rates the ground, not the air in any home.
Local help
Alamance County, Local resources
Radon testing and mitigation in Alamance County
- North Carolina Radon ProgramNorth Carolina Radon Program, run by NCDHHS, answers questions about testing, mitigation and the rules in North Carolina.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
- Professionals in North Carolina2 professionals are listed in North Carolina.
What North Carolina's program says
- Licensing of radon professionals
The North Carolina Radon Program is presently developing a Radon Proficiency Program as directed by Session Law 2023-91 House Bill 782 .
What it means
Alamance County, Questions
Questions about radon in Alamance County
Are radon levels high in Alamance County?
In 2022, 0.0% of the radon tests reported to CDC for Alamance County, North Carolina were at or above 4 pCi/L, and the median reported pre-mitigation result was 0.1 pCi/L. Of 75 North Carolina counties with 30 or more tests for the same period, 61 reported a higher share; pooled, the state comes to 22.6%.
Which counties border Alamance County?
Alamance County borders 6 counties: Orange County, Guilford County, Caswell County, Chatham County, Rockingham County and Randolph County.
Products
Alamance County, Products
Testing a home in Alamance County
In Alamance County, 3.7% of 520 tests reported to CDC over the 2008 to 2017 laboratory totals reached 4 pCi/L, against 22.6% pooled across North Carolina. Zone 3 is the lowest label, yet homes at or above 4 pCi/L occur in every zone: a short-term kit (2 to 90 days) is the quick first check in Alamance County.
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
MonitorForensics Detectors
FD-65-RADON rechargeable radon detector with a color screen
- C-NRPP 2024/25: Not included
- Battery
- Alarm
- Screen
Method: Semiconductor sensor
First reading: Within 6 hours
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Alamance County, Bordering counties
Counties bordering Alamance County
Calculated by Radon411- Radon levels in Rockingham CountyEPA zone 1
27.3%at or above 4 pCi/L
Median 2.1 pCi/L · 835 tests · 23.6 points above Alamance County
- Radon levels in Caswell CountyEPA zone 2
14.9%at or above 4 pCi/L
Median 1.6 pCi/L · 47 tests · 11.2 points above Alamance County
- Radon levels in Chatham CountyEPA zone 3
10.9%at or above 4 pCi/L
Median 1.1 pCi/L · 587 tests · 7.2 points above Alamance County
- Radon levels in Orange CountyEPA zone 3
10.7%at or above 4 pCi/L
Median 1.1 pCi/L · 1,095 tests · 7.0 points above Alamance County
- Radon levels in Guilford CountyEPA zone 3
7.9%at or above 4 pCi/L
Median 0.9 pCi/L · 6,870 tests · 4.2 points above Alamance County
- Radon levels in Randolph CountyEPA zone 3
7.1%at or above 4 pCi/L
Median 0.9 pCi/L · 422 tests · 3.4 points above Alamance County
Alamance County, Cities and towns
Cities and towns in Alamance County
Alamance County is growing: the Census Bureau puts it at 186,177 residents on July 1, 2025, up 8.5% from 171,624 in 2020. That works out to 440 people per square mile of land. Burlington, the largest place on its list (61,496 residents in all), extends beyond Alamance County, so no share of the total is worked out for it. Reported testing is thin here: 520 tests over 2008 to 2017, or 2.8 for every 1,000 residents (2025 estimate), where North Carolina as a whole comes to 6.5.
From Burlington to Ossipee, CDC publishes no figure by town: each reads Alamance County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Burlingtonextends beyond Alamance County | 61,496 | +6.8% | Counted whole |
| Mebaneextends beyond Alamance County | 21,952 | +20.3% | Counted whole |
| Graham | 20,131 | +17.3% | 10.8% |
| Elon | 11,366 | +3.9% | 6.1% |
| Gibsonvilleextends beyond Alamance County | 9,876 | +7.9% | Counted whole |
| Green Level | 3,409 | +8.2% | 1.8% |
| Swepsonville | 2,632 | +7.3% | 1.4% |
| Haw River | 2,425 | +7.4% | 1.3% |
| Alamance | 1,061 | +7.0% | 0.6% |
| Ossipee | 577 | +7.9% | 0.3% |
10 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). A place that extends beyond Alamance County is counted whole, so it has no share.
Alamance County, Homes
Homes in Alamance County
Of Alamance County's 75,456 homes, 65% are detached houses, against 65% across North Carolina; 14% are in buildings of five or more homes. Half of its homes were built before 1987, close to North Carolina's 1990: 21% date from before 1960 and 31% from 2000 or later. 66% of occupied homes are lived in by their owner (North Carolina: 66%); in the rest a tenant can run a test, but a fix is the landlord's to make.
| Homes | Alamance County | North Carolina |
|---|---|---|
| Housing units | 75,456 | 4,815,195 |
| Detached houses | 65% | 65% |
| In buildings of 5 or more | 14% | 14% |
| Mobile homes | 12% | 11% |
| Built before 1960 | 21% | 14% |
| Built since 2000 | 31% | 33% |
| Middle year built | 1987 | 1990 |
| Owner-occupied | 66% | 66% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.