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 Dillon County, South Carolina
EPA puts Dillon County in Zone 3, its lowest radon zone, and only 18 radon tests from it are on file with CDC (2008 to 2017, laboratory totals). Homes with elevated levels occur in all three zones, so only a test measures yours.
Data checked By Radon411Methodology
Highest bordering
3.8%
Robeson County
- Robeson
- 3.8%
- Columbus
- 0.0%
4 of 6 neighbours have 30+ tests, 2008 to 2017
Nearest county
0.0%
Florence County, 31 miles
- Florence
- 0.0%
- SC
- 19.4%
Share at 4+ pCi/L, 59 tests, 2008 to 2017
Ground above low
None
18.5 pts below SC
- Dillon
- 0.0%
- SC
- 18.5%
Share of land USGS rates moderate or high potential
Tests reported
18
Too few for a share
- Dillon
- 18
- Needed
- 30
2008 to 2017, laboratory
EPA radon zone
Zone 3
Lower potential
- 1
- 2
- Zone 3
1 highest, 3 lowest
EPA predicts under 2 pCi/L indoors
Read a result for Dillon County
Starts at EPA's action level
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 4.0 pCi/L
At or above 4 pCi/L
- Under 20 to 1.9 pCi/L
- 2 to 4consider a fix
- 4 and aboveEPA says fix it
This result is at or above 4 pCi/L. EPA recommends fixing a home when the radon level is 4 pCi/L or higher.
The data
Dillon County, At a glance
Dillon 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 Dillon County, 2008 to 2017, laboratory
CDC holds 18 reported tests for Dillon County over the 2008 to 2017 laboratory totals, with a median of 0.3 pCi/L: too few to describe a county (Radon411 reads a share from 30 tests up). Dillon County beside the counties around it is how this page reads it.
What these figures count
Only 18 tests were reported to CDC for Dillon County over 2008 to 2017 (laboratory totals), 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: 2008 to 2017, laboratory. Measured data period: 2005 to 2017 (every CDC figure on file).
Dillon County, Compared
Dillon County radon figures, compared
Calculated by Radon411CDC's largest figure for Dillon County rests on 18 tests over the 2008 to 2017 laboratory totals, 0 of them at or above 4 pCi/L, so each test moves its share by 5.6 points and no rank or comparison is drawn from it. Results reached as high as 1.8 pCi/L, with a middle value of 0.3 pCi/L.
Of the counties bordering it, 4 have a figure over the 2008 to 2017 laboratory totals: Robeson County, NC reported the largest share at or above 4 pCi/L, 3.8%, and Columbus County, NC the smallest, 0.0%, with Horry County at 0.9% and Florence County at 0.0% between. Farther out, Sumter County (66 miles away) at 11.9%, Kershaw County (69 miles away) at 5.0% and Lancaster County (78 miles away) at 13.6% have figures too. Pooled across 46 South Carolina counties, 19.4% of reported tests reached that level; across every county in the country with a figure, 35.7%.
Statewide for the same period, Oconee County reported the highest share (42.6%) and Florence County the lowest (0.0%). EPA's 1993 map puts Dillon County in Zone 3, its lowest label: a predicted county average under 2 pCi/L. USGS geology rates 100% of the county's land low radon potential.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Dillon County, Geology
The ground under Dillon County
PredictedUSGS's geologic map puts all of Dillon 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 | 100% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Dillon County beside the ground around it
Across South Carolina 0.2% of the land is rated high; none of Dillon County's is. None of the 6 counties that border it has any moderate-potential ground either.
The map rates the ground, not the air in any home.
Local help
Dillon County, Local resources
Radon testing and mitigation in Dillon 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
Dillon County, Questions
Questions about radon in Dillon County
Are radon levels high in Dillon County?
Over the 2008 to 2017 laboratory totals, 0.0% of the radon tests reported to CDC for Dillon County, South Carolina were at or above 4 pCi/L, and the median reported pre-mitigation result was 0.3 pCi/L. Of the counties bordering it, 4 have a figure over the 2008 to 2017 laboratory totals: Robeson County, NC reported the largest share at or above 4 pCi/L, 3.8%, and Columbus County, NC the smallest, 0.0%, with Horry County at 0.9% and Florence County at 0.0% between.
Which counties border Dillon County?
Dillon County borders 6 counties: Marlboro County, SC, Robeson County, NC, Marion County, SC, Florence County, SC, Horry County, SC and Columbus County, NC.
Products
Dillon County, Products
Testing a home in Dillon County
No CDC figure names Dillon County; the nearest county with one, Florence County (31 miles away), reported 0.0% of its tests at or above 4 pCi/L over the 2008 to 2017 laboratory totals, the only reading nearby until a test of this home. 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 Dillon 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
Corentium Home battery digital radon detector
- C-NRPP 2024/25: Approved
- Battery
- Screen
Method: Alpha spectrometry
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Dillon County, Bordering counties
Counties bordering Dillon County
Calculated by Radon411- Radon levels in Robeson County, NCEPA zone 3
3.8%at or above 4 pCi/L
Median 0.8 pCi/L · 53 tests
- Radon levels in Horry County, SCEPA zone 3
0.9%at or above 4 pCi/L
Median 0.6 pCi/L · 106 tests
- Radon levels in Marlboro County, SCEPA zone 3
0.0%at or above 4 pCi/L
Median 0.9 pCi/L · 7 tests
- Radon levels in Marion County, SCEPA zone 3
0.0%at or above 4 pCi/L
Median 0.9 pCi/L · 9 tests
- Radon levels in Florence County, SCEPA zone 3
0.0%at or above 4 pCi/L
Median 0.7 pCi/L · 59 tests
- Radon levels in Columbus County, NCEPA zone 3
0.0%at or above 4 pCi/L
Median 0.1 pCi/L · 31 tests
Dillon County, Cities and towns
Cities and towns in Dillon County
About 27,458 people live in Dillon County by the Census Bureau's estimate for July 1, 2025, 816 fewer than in 2020 (−2.9%). That works out to 68 people per square mile of land. Its largest town, Dillon, has 6,227 residents, 22.7% of the total. Together its 3 incorporated places hold 29.9% of those residents; the other 70.1% live outside any of them. Reported testing is thin here: 18 tests over 2008 to 2017, or 0.7 for every 1,000 residents (2025 estimate), where South Carolina as a whole comes to 4.8.
From Dillon to Lake View, CDC publishes no figure by town: each reads Dillon County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Dillon | 6,227 | −4.5% | 22.7% |
| Latta | 1,235 | −4.7% | 4.5% |
| Lake View | 754 | −4.1% | 2.7% |
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).
Dillon County, Homes
Homes in Dillon County
Mobile homes are 37% of Dillon County's 12,879 homes and detached houses 55%, against 64% across South Carolina. Half of its homes were built before 1984, close to South Carolina's 1991: 14% date from before 1960 and 20% from 2000 or later. 60% of occupied homes are lived in by their owner (South Carolina: 71%); in the rest a tenant can run a test, but a fix is the landlord's to make.
| Homes | Dillon County | South Carolina |
|---|---|---|
| Housing units | 12,879 | 2,401,638 |
| Detached houses | 55% | 64% |
| In buildings of 5 or more | 4% | 13% |
| Mobile homes | 37% | 15% |
| Built before 1960 | 14% | 13% |
| Built since 2000 | 20% | 35% |
| Middle year built | 1984 | 1991 |
| Owner-occupied | 60% | 71% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.