Short-term kitKidde
442020 short-term charcoal radon test kit
- Lab fee included
Method: Charcoal
In home: 3 days
Locations and reports
Radon Levels in Jasper County, South Carolina
EPA puts Jasper County in Zone 3, its lowest radon zone, and only 9 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
2.0%
Beaufort County
- Beaufort
- 2.0%
- Chatham
- 0.0%
2 of 4 neighbours have 30+ tests, 2008 to 2017
Nearest county
2.0%
Beaufort County, 18 miles
- Beaufort
- 2.0%
- SC
- 19.4%
Share at 4+ pCi/L, 246 tests, 2008 to 2017
Ground above low
None
18.5 pts below SC
- Jasper
- 0.0%
- SC
- 18.5%
Share of land USGS rates moderate or high potential
Tests reported
9
Too few for a share
- Jasper
- 9
- 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 Jasper 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
Jasper County, At a glance
Jasper County at a glance
Predicted: EPA radon zone
EPA Zone 3: lower predicted potential
USGS geologic potential: Low across 99% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Jasper County, 2008 to 2017, laboratory
CDC holds 9 reported tests for Jasper County over the 2008 to 2017 laboratory totals, with a median of 0.6 pCi/L: too few to describe a county (Radon411 reads a share from 30 tests up). Jasper County beside the counties around it is how this page reads it.
What these figures count
Only 9 tests were reported to CDC for Jasper 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).
Jasper County, Compared
Jasper County radon figures, compared
Calculated by Radon411CDC's largest figure for Jasper County rests on 9 tests over the 2008 to 2017 laboratory totals, 0 of them at or above 4 pCi/L, so each test moves its share by 11.1 points and no rank or comparison is drawn from it. Results reached as high as 1.2 pCi/L, with a middle value of 0.6 pCi/L.
Of the counties bordering it, 2 have a figure over the 2008 to 2017 laboratory totals: Beaufort County reported the largest share at or above 4 pCi/L, 2.0%, and Chatham County, GA the smallest, 0.0%. Farther out, Dorchester County (57 miles away) at 4.8%, Charleston County (69 miles away) at 1.5% and Orangeburg County (70 miles away) at 5.7% 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 Jasper County in Zone 3, its lowest label: a predicted county average under 2 pCi/L. USGS geology rates 99% of the county's land low radon potential.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Jasper County, Geology
The ground under Jasper County
PredictedUSGS's geologic map puts all of Jasper County's mapped land in one class: low radon potential. 98.2% of it lies in the area the map calls Lower Coastal Plain, to which USGS gives a radon index of 7, in the low band (5 to 8).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Lower Coastal Plain | Dune, beach, and marine sediments. | Low | 7 | 98.2% |
| Coastal Plain | Quaternary and Pleistocene-Pliocene coastal sand and gravel, lagoon and marsh clay and silt. | Low | 7 | 0.9% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Jasper County beside the ground around it
Across South Carolina 0.2% of the land is rated high; none of Jasper County's is. None of the 4 counties that border it has any moderate-potential ground either.
The map rates the ground, not the air in any home.
Local help
Jasper County, Local resources
Radon testing and mitigation in Jasper 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
Jasper County, Questions
Questions about radon in Jasper County
Are radon levels high in Jasper County?
Over the 2008 to 2017 laboratory totals, 0.0% of the radon tests reported to CDC for Jasper County, South Carolina were at or above 4 pCi/L, and the median reported pre-mitigation result was 0.6 pCi/L. Of the counties bordering it, 2 have a figure over the 2008 to 2017 laboratory totals: Beaufort County reported the largest share at or above 4 pCi/L, 2.0%, and Chatham County, GA the smallest, 0.0%.
Which counties border Jasper County?
Jasper County borders 4 counties: Effingham County, GA, Beaufort County, SC, Hampton County, SC and Chatham County, GA.
Products
Jasper County, Products
Testing a home in Jasper County
No CDC figure names Jasper County; the nearest county with one, Beaufort County (18 miles away), reported 2.0% 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 Jasper 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
MonitorAEGTEST
HOUND-1085 palm-sized rechargeable radon detector
- 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
Jasper County, Bordering counties
Counties bordering Jasper County
Calculated by Radon411- Radon levels in Beaufort County, SCEPA zone 3
2.0%at or above 4 pCi/L
Median 0.7 pCi/L · 246 tests
- Radon levels in Effingham County, GAEPA zone 3
0.0%at or above 4 pCi/L
Median 1.2 pCi/L · 8 tests
- Radon levels in Hampton County, SCEPA zone 3
0.0%at or above 4 pCi/L
Median 0.1 pCi/L · 6 tests
- Radon levels in Chatham County, GAEPA zone 3
0.0%at or above 4 pCi/L
Median 0.6 pCi/L · 45 tests
Jasper County, Cities and towns
Cities and towns in Jasper County
Jasper County is growing: the Census Bureau puts it at 38,533 residents on July 1, 2025, up 32.2% from 29,158 in 2020. That works out to 59 people per square mile of land. Hardeeville, the largest place on its list (16,459 residents in all), extends beyond Jasper County, so no share of the total is worked out for it. Reported testing is thin here: 9 tests over 2008 to 2017, or 0.2 for every 1,000 residents (2025 estimate), where South Carolina as a whole comes to 4.8.
From Hardeeville to Ridgeland, CDC publishes no figure by town: each reads Jasper County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Hardeevilleextends beyond Jasper County | 16,459 | +112.0% | Counted whole |
| Ridgelandextends beyond Jasper County | 3,818 | +1.9% | Counted whole |
2 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 Jasper County is counted whole, so it has no share.
Jasper County, Homes
Homes in Jasper County
Of Jasper County's 13,868 homes, 58% are detached houses, against 64% across South Carolina; 27% are mobile homes. Much of Jasper County is recent building: 56% of its homes have gone up since 2000 and the middle year built is 2002, against 1991 for South Carolina. Owners live in 76% of the occupied homes (South Carolina: 71%), so for most households a test and a fix are their own to order.
| Homes | Jasper County | South Carolina |
|---|---|---|
| Housing units | 13,868 | 2,401,638 |
| Detached houses | 58% | 64% |
| In buildings of 5 or more | 9% | 13% |
| Mobile homes | 27% | 15% |
| Built before 1960 | 7% | 13% |
| Built since 2000 | 56% | 35% |
| Middle year built | 2002 | 1991 |
| Owner-occupied | 76% | 71% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.