Short-term kit
RA100 short-term liquid scintillation radon test kit
- Lab fee extra
Method: Liquid scintillation
In home: 48 to 96 hours
Locations and reports
Radon Levels in Randolph County, Arkansas
EPA puts Randolph County in Zone 2, its middle 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
Nearest county
6.8%
Pulaski County, 130 miles
- Pulaski
- 6.8%
- Arkansas
- 22.7%
Share at 4+ pCi/L, 103 tests, 2007 to 2016
Ground above low
71.1%
49.8 pts above Arkansas
- Randolph
- 71.1%
- Arkansas
- 21.3%
Share of land USGS rates moderate or high potential
Tests reported
2
Too few for a share
- Randolph
- 2
- Needed
- 30
2008 to 2017, laboratory
EPA radon zone
Zone 2
Moderate potential
- 1
- Zone 2
- 3
1 highest, 3 lowest
EPA predicts 2 to 4 pCi/L indoors
Read a result for Randolph 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
Randolph County, At a glance
Randolph County at a glance
Predicted: EPA radon zone
EPA Zone 2: moderate predicted potential
Randolph County is a
USGS geologic potential: Moderate across 71% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Randolph County, 2008 to 2017, laboratory
CDC holds 2 reported tests for Randolph County over the 2008 to 2017 laboratory totals, with a median of 3.2 pCi/L: too few to describe a county (Radon411 reads a share from 30 tests up). Randolph County beside the counties around it is how this page reads it.
What these figures count
Only 2 tests were reported to CDC for Randolph 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).
Randolph County, Compared
Randolph County radon figures, compared
Calculated by Radon411CDC's largest figure for Randolph County rests on 2 tests over the 2008 to 2017 laboratory totals, 1 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 4.9 pCi/L, with a middle value of 3.2 pCi/L.
The nearest counties with a figure are Pulaski County (130 miles away) at 6.8%, Saline County (149 miles away) at 31.9% and Garland County (171 miles away) at 45.8%. 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 Randolph County in Zone 2, its middle label: a predicted county average between 2 and 4 pCi/L. USGS geology rates 71% of the county's land moderate radon potential.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Randolph County, Geology
The ground under Randolph County
PredictedUSGS's geologic map splits Randolph County: 71.1% of its land is moderate radon potential and 28.9% low. The map puts 70.8% of Randolph County in the area it calls Salem Plateau and 28.9% in Mississippi Alluvial Plain. USGS gives the first a radon index of 9, in the moderate band (9 to 11), and the second 8, in the low band (5 to 8).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Salem Plateau | Ordovician dolomite. | Moderate | 9 | 70.8% |
| Mississippi Alluvial Plain | Alluvial sand, silt, gravel, and clay. | Low | 8 | 28.9% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Randolph County beside the ground around it
Randolph County has more moderate-potential ground than Arkansas as a whole: 71.1% of its land against 21.3%. Of the 6 counties that border it, 3 have more moderate-potential ground, Oregon County, MO the most at 100%.
The map rates the ground, not the air in any home.
Local help
Randolph County, Local resources
Radon testing and mitigation in Randolph 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
Randolph County, Questions
Questions about radon in Randolph County
Are radon levels high in Randolph County?
Over the 2008 to 2017 laboratory totals, 50.0% of the radon tests reported to CDC for Randolph County, Arkansas were at or above 4 pCi/L, and the median reported pre-mitigation result was 3.2 pCi/L. Of the 5 nearest counties with a figure, within 180 miles, the share of tests at or above 4 pCi/L runs from 6.8% to 45.8%.
Which counties border Randolph County?
Randolph County borders 6 counties: Lawrence County, AR, Ripley County, MO, Sharp County, AR, Greene County, AR, Clay County, AR and Oregon County, MO.
Products
Randolph County, Products
Testing a home in Randolph County
No CDC figure names Randolph County; the nearest county with one, Pulaski County (130 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. In Zone 2 a short-term kit (2 to 90 days) is the quick first check in Randolph 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
MonitorForensics Detectors
FD-65-RADON rechargeable radon detector with a color screen
- 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
Randolph County, Bordering counties
Counties bordering Randolph County
Calculated by Radon411- Radon levels in Oregon County, MOEPA zone 2
50.0%at or above 4 pCi/L
Median 4.8 pCi/L · 2 tests
- Radon levels in Ripley County, MOEPA zone 2
44.4%at or above 4 pCi/L
Median 3.3 pCi/L · 9 tests
- Radon levels in Sharp County, AREPA zone 2
44.4%at or above 4 pCi/L
Median 2.9 pCi/L · 9 tests
- Radon levels in Lawrence County, AREPA zone 3
0.0%at or above 4 pCi/L
Median 1.9 pCi/L · 1 test
- Radon levels in Greene County, AREPA zone 3
0.0%at or above 4 pCi/L
Median 1.4 pCi/L · 3 tests
- Radon levels in Clay County, AREPA zone 3
0.0%at or above 4 pCi/L
Median 1.4 pCi/L · 2 tests
Randolph County, Cities and towns
Cities and towns in Randolph County
The Census Bureau estimates 18,876 residents in Randolph County for July 1, 2025, 283 more than in 2020 (+1.5%). That works out to 29 people per square mile of land. Its largest town, Pocahontas, has 7,622 residents, 40.4% of the total. Together its 6 incorporated places hold 47.7% of those residents; the other 52.3% live outside any of them. Reported testing is thin here: 2 tests over 2008 to 2017, or 0.1 for every 1,000 residents (2025 estimate), where Arkansas as a whole comes to 0.2.
From Pocahontas to Ravenden Springs, CDC publishes no figure by town: each reads Randolph County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Pocahontas | 7,622 | +3.0% | 40.4% |
| Reyno | 391 | Level | 2.1% |
| Maynard | 370 | −0.5% | 2.0% |
| Biggers | 313 | Level | 1.7% |
| O'Kean | 193 | +0.5% | 1.0% |
| Ravenden Springs | 121 | −0.8% | 0.6% |
6 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).
Randolph County, Homes
Homes in Randolph County
Randolph County is a place of houses on their own lots: 78% of its 8,620 homes are detached single-family houses, against 70% across Arkansas. The homes are older than Arkansas' as a whole: half were built before 1979 (1987 for Arkansas), and 13% date from before 1960. 73% 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 | Randolph County | Arkansas |
|---|---|---|
| Housing units | 8,620 | 1,382,664 |
| Detached houses | 78% | 70% |
| In buildings of 5 or more | 1% | 10% |
| Mobile homes | 13% | 11% |
| Built before 1960 | 13% | 14% |
| Built since 2000 | 21% | 28% |
| Middle year built | 1979 | 1987 |
| Owner-occupied | 73% | 66% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.