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 Jefferson County, Arkansas
EPA puts Jefferson County in Zone 3, its lowest radon zone, and only 2 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
6.8%
Pulaski County
- Pulaski
- 6.8%
1 of 6 neighbours have 30+ tests, 2007 to 2016
Nearest county
6.8%
Pulaski County, 41 miles
- Pulaski
- 6.8%
- Arkansas
- 22.7%
Share at 4+ pCi/L, 103 tests, 2007 to 2016
Ground above low
None
21.3 pts below Arkansas
- Jefferson
- 0.0%
- Arkansas
- 21.3%
Share of land USGS rates moderate or high potential
Tests reported
2
Too few for a share
- Jefferson
- 2
- 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 Jefferson 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
Jefferson County, At a glance
Jefferson 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 Jefferson County, 2008 to 2017, laboratory
CDC holds 2 reported tests for Jefferson County over the 2008 to 2017 laboratory totals, with a median of 0.5 pCi/L: too few to describe a county (Radon411 reads a share from 30 tests up). Jefferson County beside the counties around it is how this page reads it.
What these figures count
Only 2 tests were reported to CDC for Jefferson 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).
Jefferson County, Compared
Jefferson County radon figures, compared
Calculated by Radon411CDC's largest figure for Jefferson County rests on 2 tests over the 2008 to 2017 laboratory totals, 0 of them at or above 4 pCi/L, so each test moves its share by 50.0 points and no rank or comparison is drawn from it. Results reached as high as 0.8 pCi/L, with a middle value of 0.5 pCi/L.
Pulaski County, the one bordering county with a figure over the 2007 to 2016 laboratory totals, reported 6.8% of its tests at or above 4 pCi/L. Farther out, Saline County (50 miles away) at 31.9%, Garland County (73 miles away) at 45.8% and Washington County (175 miles away) at 14.3% have figures too. Pooled across 60 Arkansas counties, 22.7% of reported tests reached that level; across every county in the country with a figure, 35.8%.
Statewide for the same period, Garland County reported the highest share (45.8%) and Pulaski County the lowest (6.8%). EPA's 1993 map puts Jefferson 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.
Jefferson County, Geology
The ground under Jefferson County
PredictedUSGS's geologic map puts all of Jefferson County's mapped land in one class: low radon potential. The map puts 70.2% of Jefferson County in the area it calls Mississippi Alluvial Plain and 29.8% in West Gulf Coastal Plain. USGS gives the first a radon index of 8 and the second 7, both in the low band (5 to 8).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Mississippi Alluvial Plain | Alluvial sand, silt, gravel, and clay. | Low | 8 | 70.2% |
| West Gulf Coastal Plain | Glauconitic, phosphatic, and carbonaceous sediments. | Low | 7 | 29.8% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Jefferson County beside the ground around it
Across Arkansas 21.3% of the land is rated moderate; none of Jefferson County's is. Of the 6 counties that border it, 1 has more moderate-potential ground, Pulaski County the most at 9.3%.
The map rates the ground, not the air in any home.
Local help
Jefferson County, Local resources
Radon testing and mitigation in Jefferson County
- Arkansas's radon programArkansas Department of HealthArkansas's radon program answers questions about testing, mitigation and the rules in Arkansas.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
- See the Arkansas directoryNo professionals are listed in Arkansas yet. The state program can point you to registered testers and mitigators.
What Arkansas's program says
- Phone
- 501-661-2621
- ADH.EPI.Radon@arkansas.gov
What it means
Jefferson County, Questions
Questions about radon in Jefferson County
Are radon levels high in Jefferson County?
Over the 2008 to 2017 laboratory totals, 0.0% of the radon tests reported to CDC for Jefferson County, Arkansas were at or above 4 pCi/L, and the median reported pre-mitigation result was 0.5 pCi/L. Pulaski County, the one bordering county with a figure over the 2007 to 2016 laboratory totals, reported 6.8% of its tests at or above 4 pCi/L.
Which counties border Jefferson County?
Jefferson County borders 6 counties: Grant County, Lincoln County, Lonoke County, Arkansas County, Pulaski County and Cleveland County.
Products
Jefferson County, Products
Testing a home in Jefferson County
No CDC figure names Jefferson County; the nearest county with one, Pulaski County (41 miles away), reported 6.8% of its tests at or above 4 pCi/L over the 2007 to 2016 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 Jefferson 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
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
Jefferson County, Bordering counties
Counties bordering Jefferson County
Calculated by Radon411- Radon levels in Pulaski CountyEPA zone 3
6.8%at or above 4 pCi/L
Median 0.9 pCi/L · 103 tests
- Radon levels in Grant CountyEPA zone 3
0.0%at or above 4 pCi/L
Median 0.9 pCi/L · 1 test
- Radon levels in Lonoke CountyEPA zone 3
0.0%at or above 4 pCi/L
Median 0.8 pCi/L · 3 tests
- Radon levels in Arkansas CountyEPA zone 3
0.0%at or above 4 pCi/L
Median 1.3 pCi/L · 1 test
- Radon levels in Cleveland CountyEPA zone 3
0.0%at or above 4 pCi/L
Median 0.1 pCi/L · 3 tests
- Radon levels in Lincoln CountyEPA zone 3
No CDC figure for 2007 to 2016; its page reads it against its own neighbours.
Jefferson County, Cities and towns
Cities and towns in Jefferson County
Jefferson County has been losing residents: from 66,825 in 2020 to 62,987 on July 1, 2025, a fall of 5.7% by the Census Bureau's estimates. That works out to 72 people per square mile of land. Pine Bluff alone is home to 38,213 of them, 60.7% of the total. Reported testing is thin here: 2 tests over 2008 to 2017, or under 0.1 for every 1,000 residents (2025 estimate), where Arkansas as a whole comes to 0.2.
From Pine Bluff to Sherrill, CDC publishes no figure by town: each reads Jefferson County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Pine Bluff | 38,213 | −6.7% | 60.7% |
| White Hall | 5,532 | −1.8% | 8.8% |
| Redfield | 1,492 | −0.5% | 2.4% |
| Altheimer | 642 | −7.8% | 1.0% |
| Humphreyextends beyond Jefferson County | 430 | −6.9% | Counted whole |
| Wabbaseka | 168 | −7.7% | 0.3% |
| Sherrill | 51 | −8.9% | Under 0.1% |
7 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 Jefferson County is counted whole, so it has no share.
Jefferson County, Homes
Homes in Jefferson County
Of Jefferson County's 30,710 homes, 71% are detached houses, against 70% across Arkansas; 12% are mobile homes. The homes are older than Arkansas' as a whole: half were built before 1976 (1987 for Arkansas), and 22% date from before 1960. 63% of occupied homes are lived in by their owner (Arkansas: 66%); in the rest a tenant can run a test, but a fix is the landlord's to make.
| Homes | Jefferson County | Arkansas |
|---|---|---|
| Housing units | 30,710 | 1,382,664 |
| Detached houses | 71% | 70% |
| In buildings of 5 or more | 11% | 10% |
| Mobile homes | 12% | 11% |
| Built before 1960 | 22% | 14% |
| Built since 2000 | 15% | 28% |
| Middle year built | 1976 | 1987 |
| Owner-occupied | 63% | 66% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.