Short-term kit
Radon Short Term Test Kit short-term charcoal radon test kit, lab fee included
- Lab fee included
Method: Charcoal
In home: 2 to 7 days
Locations and reports
Radon Levels in Aiken County, South Carolina
EPA puts Aiken County in Zone 3, its lowest radon zone, and most reported tests there come back low, though 13.3% of 241 (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
13.3%
6.1 pts below SC
- Aiken
- 13.3%
- SC
- 19.4%
241 tests, 2008 to 2017
Median result
1.3pCi/L
Below action level
- Aiken
- 1.3 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2008 to 2017
Tests reported
241
13th of 24 by tests
- Aiken
- 241
- Greenville
- 12,004
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 SC
11 of 24
Middle half
- Aiken
- 13.3%
- Oconee
- 42.6%
By share, of 24 with 30+ tests
Read a result for Aiken County
Starts at Aiken County's median, 1.3 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 1.3 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. Aiken County's median reported result, 2008 to 2017.
The data
Aiken County, At a glance
Aiken 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 Aiken County, 2008 to 2017, laboratory
Under 2 pCi/L: 66%2 to 4 pCi/L: 21%4 pCi/L and above: 13%
Of 241 pre-mitigation tests reported to CDC, not homes in this area.
| Result band | Tests Measured | Share Measured |
|---|---|---|
| Under 2 pCi/L | 158 | 65.6% |
| 2 to 4 pCi/L | 51 | 21.2% |
| 4 pCi/L and above | 32 | 13.3% |
What these figures count
These are the 241 tests reported to CDC for Aiken 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).
Aiken County, Compared
Aiken County radon figures, compared
Calculated by Radon411Aiken County reports fewer high tests than South Carolina overall. 13.3% of its 241 tests over the 2008 to 2017 laboratory totals were at or above 4 pCi/L. That is 6.1 points below the 19.4% pooled from 46 South Carolina counties.
Ordered from highest share down, it comes 11th of 24 South Carolina counties with 30 or more tests for the same period. Nationally, every county with a figure for the same period pools to 35.7%; Aiken County sits 22.4 points below it.
Next door, the shares run from 0.0% in Richmond County, GA to 12.5% in Lexington County, with Lexington County, Orangeburg County and Richmond County, GA below Aiken County. Zone 3 on EPA's map (predicted average under 2 pCi/L) and a 13.3% share point the same way here.
Half the tests came in under 1.3 pCi/L and half over it; the single highest reached 11.9 pCi/L. The rest split 65.6% under 2 pCi/L and 21.2% from 2 to 4 (South Carolina: 57.4% and 23.1%).
CDC's ten-year totals for Aiken County went from 403 tests (2005 to 2014) to 241 (2008 to 2017), the share going from 11.9% to 13.3%.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Aiken County, Geology
The ground under Aiken County
PredictedUSGS's geologic map puts all of Aiken County's mapped land in one class: low radon potential. All of it lies in the area the map calls Upper and Middle Coastal Plain, to which USGS gives a radon index of 8, in the low band (5 to 8).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Upper and Middle Coastal Plain | Tertiary coastal plain sandy and silty sediments and marsh deposits. | Low | 8 | 99.6% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Aiken County beside the ground around it
Across South Carolina 0.2% of the land is rated high; none of Aiken County's is. Of the 7 counties that border it, 2 have more moderate-potential ground, Saluda County the most at 3.6%.
The map rates the ground, not the air in any home.
Local help
Aiken County, Local resources
Radon testing and mitigation in Aiken County
- South Carolina Radon ProgramSouth Carolina Radon Program, run by South Carolina Department of Environmental Services, offers free or discounted test kits, and answers questions about testing and mitigation in South Carolina.Visit the program’s page(opens in a new tab)
- Free and low-cost kitsThe program says:
The South Carolina Radon Program offers free short-term radon test kits to South Carolina homeowners, subject to availability.
- Compare kits
- Professionals in South Carolina2 professionals are listed in South Carolina.
What South Carolina's program says
- Phone
- 1-800-768-0362
- radon@des.sc.gov
What it means
Aiken County, Questions
Questions about radon in Aiken County
Are radon levels high in Aiken County?
Over the 2008 to 2017 laboratory totals, 13.3% of the radon tests reported to CDC for Aiken County, South Carolina were at or above 4 pCi/L, and the median reported pre-mitigation result was 1.3 pCi/L. Of 24 South Carolina counties with 30 or more tests for the same period, 10 reported a higher share; pooled, the state comes to 19.4%.
Which counties border Aiken County?
Aiken County borders 7 counties: Barnwell County, SC, Edgefield County, SC, Lexington County, SC, Saluda County, SC, Richmond County, GA, Burke County, GA and Orangeburg County, SC.
Products
Aiken County, Products
Testing a home in Aiken County
In Aiken County, 13.3% of 241 tests reported to CDC over the 2008 to 2017 laboratory totals reached 4 pCi/L, against 19.4% pooled across South 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 Aiken 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
Monitor
EcoBlu plug-in digital radon monitor with a display
- C-NRPP 2024/25: Not included
- Plug-in
- Alarm
- Screen
Method: Ion chamber
First reading: Within 10 minutes
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Aiken County, Bordering counties
Counties bordering Aiken County
Calculated by Radon411- Radon levels in Edgefield County, SCEPA zone 3
25.0%at or above 4 pCi/L
Median 1.2 pCi/L · 12 tests · 11.7 points above Aiken County
- Radon levels in Saluda County, SCEPA zone 3
16.7%at or above 4 pCi/L
Median 1.1 pCi/L · 18 tests · 3.4 points above Aiken County
- Radon levels in Lexington County, SCEPA zone 3
12.5%at or above 4 pCi/L
Median 0.9 pCi/L · 591 tests · 0.8 points below Aiken County
- Radon levels in Orangeburg County, SCEPA zone 3
5.7%at or above 4 pCi/L
Median 0.9 pCi/L · 53 tests · 7.6 points below Aiken County
- Radon levels in Barnwell County, SCEPA zone 3
0.0%at or above 4 pCi/L
Median 1.9 pCi/L · 6 tests · 13.3 points below Aiken County
- Radon levels in Richmond County, GAEPA zone 2
0.0%at or above 4 pCi/L
Median 1.4 pCi/L · 32 tests · 13.3 points below Aiken County
- Radon levels in Burke County, GAEPA zone 3
0.0%at or above 4 pCi/L
Median 0.9 pCi/L · 4 tests · 13.3 points below Aiken County
Aiken County, Cities and towns
Cities and towns in Aiken County
Aiken County is growing: the Census Bureau puts it at 181,515 residents on July 1, 2025, up 7.3% from 169,170 in 2020. That works out to 170 people per square mile of land. No town dominates: Aiken, the largest, has 33,808 residents, 18.6% of the total. Reported testing is thin here: 241 tests over 2008 to 2017, or 1.3 for every 1,000 residents (2025 estimate), where South Carolina as a whole comes to 4.8.
From Aiken to Windsor, CDC publishes no figure by town: each reads Aiken County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Aiken | 33,808 | +5.1% | 18.6% |
| North Augustaextends beyond Aiken County | 26,982 | +10.3% | Counted whole |
| Burnettown | 3,267 | +6.4% | 1.8% |
| New Ellenton | 2,338 | +6.1% | 1.3% |
| Jackson | 1,639 | +7.3% | 0.9% |
| Wagener | 693 | +8.1% | 0.4% |
| Salley | 356 | +6.3% | 0.2% |
| Perry | 213 | +9.2% | 0.1% |
| Monettaextends beyond Aiken County | 212 | +7.1% | Counted whole |
| Windsor | 124 | +10.7% | Under 0.1% |
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 Aiken County is counted whole, so it has no share.
Aiken County, Homes
Homes in Aiken County
Of Aiken County's 78,715 homes, 68% are detached houses, against 64% across South Carolina; 18% are mobile homes. Half of its homes were built before 1988, close to South Carolina's 1991: 18% date from before 1960 and 30% from 2000 or later. Owners live in 77% of the occupied homes (South Carolina: 71%), so for most households a test and a fix are their own to order.
| Homes | Aiken County | South Carolina |
|---|---|---|
| Housing units | 78,715 | 2,401,638 |
| Detached houses | 68% | 64% |
| In buildings of 5 or more | 5% | 13% |
| Mobile homes | 18% | 15% |
| Built before 1960 | 18% | 13% |
| Built since 2000 | 30% | 35% |
| Middle year built | 1988 | 1991 |
| Owner-occupied | 77% | 71% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.