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 Davie County, North Carolina
EPA puts Davie 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
17.4%
5.2 pts below NC
- Davie
- 17.4%
- NC
- 22.6%
694 tests, 2008 to 2017
Median result
1.7pCi/L
Below action level
- Davie
- 1.7 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2008 to 2017
Tests reported
694
26th of 75 by tests
- Davie
- 694
- 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
43 of 75
Middle half
- Davie
- 17.4%
- Transylvania
- 47.8%
By share, of 75 with 30+ tests
Read a result for Davie County
Starts at Davie County's median, 1.7 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 1.7 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. Davie County's median reported result, 2008 to 2017.
The data
Davie County, At a glance
Davie County at a glance
Predicted: EPA radon zone
EPA Zone 3: lower predicted potential
USGS geologic potential: Low across 92% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Davie County, 2022
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2014 | 23.2% |
| 2020 | 31.4% |
| 2021 | 3.7% |
| 2022 | 0.0% |
2022: 0.0%. Across these years the share ran from 0.0% to 31.4%. Each column counts radon tests reported to CDC that year, not homes.
What these figures count
Only 5 tests were reported to CDC for Davie 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).
Davie County, Compared
Davie County radon figures, compared
Calculated by Radon411Davie County's 694 reported tests over the 2008 to 2017 laboratory totals had a middle value of 1.7 pCi/L and a maximum of 55.0 pCi/L, and 17.4% reached 4 pCi/L. North Carolina as a whole (99 North Carolina counties, pooled) comes to 22.6%: 5.2 points higher than here.
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 694-test figure.
Among its state's counties it ranks 43rd of 75 North Carolina counties with 30 or more tests for the same period. Statewide for the same period, Transylvania County reported the highest share (47.8%) and Nash County the lowest (0.0%).
Below the action level, 391 tests (56.3%) came in under 2 pCi/L, against 55.6% statewide, and 182 tests (26.2%) fell between 2 and 4, against 21.8% statewide. The busiest year on file was 2014, with 99 tests reported; the quietest, 2022, had 5.
EPA's 1993 zone map puts Davie County in Zone 3, a predicted county average under 2 pCi/L. USGS geology rates 92% of the county's land low radon potential.
Next door, the shares run from 17.7% in Rowan County to 28.9% in Forsyth County.
CDC also counts 14 tests taken after mitigation in Davie County for the same period: tests in homes where a fix was already in.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Davie County, Geology
The ground under Davie County
PredictedMost of the ground under Davie County is one class on USGS's geologic map: 92.3% of its land is low radon potential, with 7.7% moderate. The map puts 88.2% of Davie County in the area it calls Charlotte Belt and 7.7% in Inner Piedmont Belt, with one smaller area beside them. USGS gives the first a radon index of 8, in the low band (5 to 8), and the second 11, in the moderate band (9 to 11).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Charlotte Belt | Igneous rocks, including granite, gabbro, and diorite. | Low | 8 | 88.2% |
| Inner Piedmont Belt | Proterozoic through Cambrian biotite gneiss and schist, and mica schist. | Moderate | 11 | 7.7% |
| Davie Basin | Fluvial arkosic sandstone, siltstone, and alluvial fan conglomerates. | Low | 8 | 4.1% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Davie County beside the ground around it
Across North Carolina 1.3% of the land is rated high; none of Davie County's is. Of the 5 counties that border it, 3 have more moderate-potential ground, Yadkin County the most at 96.8%.
The map rates the ground, not the air in any home.
Local help
Davie County, Local resources
Radon testing and mitigation in Davie 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
Davie County, Questions
Questions about radon in Davie County
Are radon levels high in Davie County?
In 2022, 0.0% of the radon tests reported to CDC for Davie County, North Carolina were at or above 4 pCi/L, and the median reported pre-mitigation result was 2.0 pCi/L. Of 75 North Carolina counties with 30 or more tests for the same period, 42 reported a higher share; pooled, the state comes to 22.6%.
Which counties border Davie County?
Davie County borders 5 counties: Rowan County, Yadkin County, Davidson County, Forsyth County and Iredell County.
Products
Davie County, Products
Testing a home in Davie County
In Davie County, 17.4% of 694 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 Davie County.
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
Davie County, Bordering counties
Counties bordering Davie County
Calculated by Radon411- Radon levels in Forsyth CountyEPA zone 2
28.9%at or above 4 pCi/L
Median 2.3 pCi/L · 6,273 tests · 11.5 points above Davie County
- Radon levels in Yadkin CountyEPA zone 2
28.6%at or above 4 pCi/L
Median 2.2 pCi/L · 199 tests · 11.2 points above Davie County
- Radon levels in Davidson CountyEPA zone 3
25.5%at or above 4 pCi/L
Median 1.8 pCi/L · 1,265 tests · 8.1 points above Davie County
- Radon levels in Iredell CountyEPA zone 2
21.8%at or above 4 pCi/L
Median 1.8 pCi/L · 1,146 tests · 4.4 points above Davie County
- Radon levels in Rowan CountyEPA zone 3
17.7%at or above 4 pCi/L
Median 1.4 pCi/L · 626 tests · 0.3 points above Davie County
Davie County, Cities and towns
Cities and towns in Davie County
Davie County is growing: the Census Bureau puts it at 45,855 residents on July 1, 2025, up 6.9% from 42,909 in 2020. That works out to 174 people per square mile of land. No town dominates: Mocksville, the largest, has 6,282 residents, 13.7% of the total. Together its 3 incorporated places hold 23.1% of those residents; the other 76.9% live outside any of them. Testing is reported here more often than across the state: CDC's 694 reported tests for 2008 to 2017 come to 15.1 for every 1,000 residents (2025 estimate), against 6.5 for North Carolina.
From Mocksville to Cooleemee, CDC publishes no figure by town: each reads Davie County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Mocksville | 6,282 | +6.2% | 13.7% |
| Bermuda Run | 3,323 | +6.1% | 7.2% |
| Cooleemee | 1,002 | +5.7% | 2.2% |
3 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).
Davie County, Homes
Homes in Davie County
Davie County is a place of houses on their own lots: 75% of its 19,079 homes are detached single-family houses, against 65% across North Carolina. Half of its homes were built before 1990, close to North Carolina's 1990: 13% date from before 1960 and 30% from 2000 or later. Owners live in 83% of the occupied homes (North Carolina: 66%), so for most households a test and a fix are their own to order.
| Homes | Davie County | North Carolina |
|---|---|---|
| Housing units | 19,079 | 4,815,195 |
| Detached houses | 75% | 65% |
| In buildings of 5 or more | 4% | 14% |
| Mobile homes | 17% | 11% |
| Built before 1960 | 13% | 14% |
| Built since 2000 | 30% | 33% |
| Middle year built | 1990 | 1990 |
| Owner-occupied | 83% | 66% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.