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 Anderson County, South Carolina
EPA puts Anderson County in Zone 2, its middle radon zone, and most reported tests there come back low, though 11.1% of 1,733 (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
11.1%
8.3 pts below SC
- Anderson
- 11.1%
- SC
- 19.4%
1,733 tests, 2008 to 2017
Median result
1.1pCi/L
Below action level
- Anderson
- 1.1 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2008 to 2017
Tests reported
1,733
4th of 24 by tests
- Anderson
- 1,733
- Greenville
- 12,004
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 SC
14 of 24
Middle half
- Anderson
- 11.1%
- Oconee
- 42.6%
By share, of 24 with 30+ tests
Read a result for Anderson County
Starts at Anderson County's median, 1.1 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 1.1 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. Anderson County's median reported result, 2008 to 2017.
The data
Anderson County, At a glance
Anderson County at a glance
Predicted: EPA radon zone
EPA Zone 2: moderate predicted potential
Anderson 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 Anderson County, 2008 to 2017, laboratory
Under 2 pCi/L: 70%2 to 4 pCi/L: 19%4 pCi/L and above: 11%
Of 1,733 pre-mitigation tests reported to CDC, not homes in this area.
| Result band | Tests Measured | Share Measured |
|---|---|---|
| Under 2 pCi/L | 1,213 | 70.0% |
| 2 to 4 pCi/L | 328 | 18.9% |
| 4 pCi/L and above | 192 | 11.1% |
What these figures count
These are the 1,733 tests reported to CDC for Anderson 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).
Anderson County, Compared
Anderson County radon figures, compared
Calculated by Radon411Anderson County reports fewer high tests than South Carolina overall. 11.1% of its 1,733 tests over the 2008 to 2017 laboratory totals were at or above 4 pCi/L. That is 8.3 points below the 19.4% pooled from 46 South Carolina counties.
Ordered from highest share down, it comes 14th 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%; Anderson County sits 24.6 points below it.
Next door, the shares run from 13.9% in Laurens County to 42.6% in Oconee County. Zone 2 on EPA's map (predicted average between 2 and 4 pCi/L) and a 11.1% share point the same way here.
Half the tests came in under 1.1 pCi/L and half over it; the single highest reached 46.8 pCi/L. The rest split 70.0% under 2 pCi/L and 18.9% from 2 to 4 (South Carolina: 57.4% and 23.1%).
CDC's ten-year totals for Anderson County went from 1,230 tests (2005 to 2014) to 1,733 (2008 to 2017), the share going from 10.5% to 11.1%.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Anderson County, Geology
The ground under Anderson County
PredictedUSGS's geologic map puts all of Anderson County's mapped land in one class: moderate radon potential. All of it lies in the area the map calls Inner Piedmont Belt, to which USGS gives a radon index of 11, in the moderate band (9 to 11).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Inner Piedmont Belt | Proterozoic through Cambrian biotite gneiss and schist, and mica schist. | Moderate | 11 | 99.8% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Anderson County beside the ground around it
Across South Carolina 0.2% of the land is rated high; none of Anderson County's is. Of the 7 counties that border it, 1 has more high-potential ground, Oconee County the most at 11.0%.
The map rates the ground, not the air in any home.
Local help
Anderson County, Local resources
Radon testing and mitigation in Anderson 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
Anderson County, Questions
Questions about radon in Anderson County
Are radon levels high in Anderson County?
Over the 2008 to 2017 laboratory totals, 11.1% of the radon tests reported to CDC for Anderson County, South Carolina were at or above 4 pCi/L, and the median reported pre-mitigation result was 1.1 pCi/L. Of 24 South Carolina counties with 30 or more tests for the same period, 13 reported a higher share; pooled, the state comes to 19.4%.
Which counties border Anderson County?
Anderson County borders 7 counties: Hart County, GA, Abbeville County, SC, Pickens County, SC, Greenville County, SC, Elbert County, GA, Oconee County, SC and Laurens County, SC.
Products
Anderson County, Products
Testing a home in Anderson County
In Anderson County, 11.1% of 1,733 tests reported to CDC over the 2008 to 2017 laboratory totals reached 4 pCi/L, against 19.4% pooled across South Carolina. In Zone 2 a short-term kit (2 to 90 days) is the quick first check in Anderson County; a long-term test tells the year-round average.
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
MonitorX-Sense
XR0B-SR battery digital radon monitor with an alarm
- C-NRPP 2024/25: Not included
- Battery
- Alarm
- 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
Anderson County, Bordering counties
Counties bordering Anderson County
Calculated by Radon411- Radon levels in Oconee County, SCEPA zone 2
42.6%at or above 4 pCi/L
Median 3.3 pCi/L · 2,469 tests · 31.5 points above Anderson County
- Radon levels in Hart County, GAEPA zone 2
40.2%at or above 4 pCi/L
Median 3.4 pCi/L · 107 tests · 29.1 points above Anderson County
- Radon levels in Pickens County, SCEPA zone 2
23.6%at or above 4 pCi/L
Median 1.8 pCi/L · 1,717 tests · 12.5 points above Anderson County
- Radon levels in Abbeville County, SCEPA zone 2
22.7%at or above 4 pCi/L
Median 1.8 pCi/L · 66 tests · 11.6 points above Anderson County
- Radon levels in Greenville County, SCEPA zone 1
19.6%at or above 4 pCi/L
Median 1.7 pCi/L · 12,004 tests · 8.5 points above Anderson County
- Radon levels in Elbert County, GAEPA zone 2
18.6%at or above 4 pCi/L
Median 1.9 pCi/L · 145 tests · 7.5 points above Anderson County
- Radon levels in Laurens County, SCEPA zone 2
13.9%at or above 4 pCi/L
Median 1.3 pCi/L · 244 tests · 2.8 points above Anderson County
Anderson County, Cities and towns
Cities and towns in Anderson County
Anderson County is growing: the Census Bureau puts it at 219,930 residents on July 1, 2025, up 7.7% from 204,181 in 2020. That works out to 308 people per square mile of land. No town dominates: Anderson, the largest, has 31,323 residents, 14.2% of the total. Testing is reported here more often than across the state: CDC's 1,733 reported tests for 2008 to 2017 come to 7.9 for every 1,000 residents (2025 estimate), against 4.8 for South Carolina.
From Anderson to Starr, CDC publishes no figure by town: each reads Anderson County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Anderson | 31,323 | +6.2% | 14.2% |
| Easleyextends beyond Anderson County | 27,319 | +18.6% | Counted whole |
| Clemsonextends beyond Anderson County | 18,941 | +6.7% | Counted whole |
| Belton | 4,631 | +6.7% | 2.1% |
| Williamston | 4,338 | +6.8% | 2.0% |
| Honea Pathextends beyond Anderson County | 3,950 | +6.9% | Counted whole |
| Pendletonextends beyond Anderson County | 3,739 | +6.9% | Counted whole |
| Pelzer | 1,434 | +6.5% | 0.7% |
| Iva | 1,209 | +6.8% | 0.5% |
| West Pelzer | 1,038 | +7.3% | 0.5% |
| Starr | 180 | +8.4% | Under 0.1% |
11 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 Anderson County is counted whole, so it has no share.
Anderson County, Homes
Homes in Anderson County
Of Anderson County's 91,008 homes, 72% are detached houses, against 64% across South Carolina; 15% are mobile homes. Half of its homes were built before 1987, close to South Carolina's 1991: 15% date from before 1960 and 27% from 2000 or later. Owners live in 75% of the occupied homes (South Carolina: 71%), so for most households a test and a fix are their own to order.
| Homes | Anderson County | South Carolina |
|---|---|---|
| Housing units | 91,008 | 2,401,638 |
| Detached houses | 72% | 64% |
| In buildings of 5 or more | 7% | 13% |
| Mobile homes | 15% | 15% |
| Built before 1960 | 15% | 13% |
| Built since 2000 | 27% | 35% |
| Middle year built | 1987 | 1991 |
| Owner-occupied | 75% | 71% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.