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 Stone County, Arkansas
EPA puts Stone County in Zone 2, its middle radon zone, and only 7 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, 76 miles
- Pulaski
- 6.8%
- Arkansas
- 22.7%
Share at 4+ pCi/L, 103 tests, 2007 to 2016
Ground above low
63.1%
41.8 pts above Arkansas
- Stone
- 63.1%
- Arkansas
- 21.3%
Share of land USGS rates moderate or high potential
Tests reported
7
Too few for a share
- Stone
- 7
- 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 Stone 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
Stone County, At a glance
Stone County at a glance
Predicted: EPA radon zone
EPA Zone 2: moderate predicted potential
Stone County is a
USGS geologic potential: Moderate across 63% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Stone County, 2008 to 2017, laboratory
CDC holds 7 reported tests for Stone County over the 2008 to 2017 laboratory totals, with a median of 1.1 pCi/L: too few to describe a county (Radon411 reads a share from 30 tests up). Stone County beside the counties around it is how this page reads it.
What these figures count
Only 7 tests were reported to CDC for Stone 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).
Stone County, Compared
Stone County radon figures, compared
Calculated by Radon411CDC's largest figure for Stone County rests on 7 tests over the 2008 to 2017 laboratory totals, 0 of them at or above 4 pCi/L, so each test moves its share by 14.3 points and no rank or comparison is drawn from it. Results reached as high as 3.1 pCi/L, with a middle value of 1.1 pCi/L.
The nearest counties with a figure are Pulaski County (76 miles away) at 6.8%, Saline County (89 miles away) at 31.9% and Garland County (105 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 Stone County in Zone 2, its middle label: a predicted county average between 2 and 4 pCi/L. USGS geology rates 63% of the county's land moderate radon potential.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Stone County, Geology
The ground under Stone County
PredictedUSGS's geologic map splits Stone County: 63.1% of its land is moderate radon potential and 36.9% low. The map puts 36.9% of Stone County in the area it calls Boston Mountains and 33.9% in Springfield Plateau, with one smaller area beside them. USGS gives the first a radon index of 8, in the low band (5 to 8), and the second 9, in the moderate band (9 to 11).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Boston Mountains | Mississippian and Pennsylvanian sandstones and shales. | Low | 8 | 36.9% |
| Springfield Plateau | Mississippian limestone, shale, and sandstone. | Moderate | 9 | 33.9% |
| Salem Plateau | Ordovician dolomite. | Moderate | 9 | 29.2% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Stone County beside the ground around it
Stone County has more moderate-potential ground than Arkansas as a whole: 63.1% of its land against 21.3%. Of the 6 counties that border it, 4 have more moderate-potential ground, Baxter County the most at 100%.
The map rates the ground, not the air in any home.
Local help
Stone County, Local resources
Radon testing and mitigation in Stone 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
Stone County, Questions
Questions about radon in Stone County
Are radon levels high in Stone County?
Over the 2008 to 2017 laboratory totals, 0.0% of the radon tests reported to CDC for Stone County, Arkansas were at or above 4 pCi/L, and the median reported pre-mitigation result was 1.1 pCi/L. Of the 5 nearest counties with a figure, within 122 miles, the share of tests at or above 4 pCi/L runs from 6.8% to 45.8%.
Which counties border Stone County?
Stone County borders 6 counties: Izard County, Baxter County, Cleburne County, Van Buren County, Searcy County and Independence County.
Products
Stone County, Products
Testing a home in Stone County
No CDC figure names Stone County; the nearest county with one, Pulaski County (76 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 Stone County; a long-term test tells the year-round average.
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
Stone County, Bordering counties
Counties bordering Stone County
Calculated by Radon411- Radon levels in Baxter CountyEPA zone 2
65.0%at or above 4 pCi/L
Median 5.3 pCi/L · 20 tests
- Radon levels in Searcy CountyEPA zone 2
50.0%at or above 4 pCi/L
Median 3.5 pCi/L · 4 tests
- Radon levels in Independence CountyEPA zone 2
26.7%at or above 4 pCi/L
Median 2.4 pCi/L · 15 tests
- Radon levels in Izard CountyEPA zone 2
0.0%at or above 4 pCi/L
Median 1.1 pCi/L · 3 tests
- Radon levels in Cleburne CountyEPA zone 3
0.0%at or above 4 pCi/L
Median 2.1 pCi/L · 7 tests
- Radon levels in Van Buren CountyEPA zone 3
0.0%at or above 4 pCi/L
Median 2.6 pCi/L · 6 tests
Stone County, Cities and towns
Cities and towns in Stone County
The Census Bureau estimates 12,703 residents in Stone County for July 1, 2025, 353 more than in 2020 (+2.9%). That works out to 21 people per square mile of land. Its largest town, Mountain View, has 2,940 residents, 23.1% of the total. Together its 2 incorporated places hold 24.4% of those residents; the other 75.6% live outside any of them. Testing is reported here more often than across the state: CDC's 7 reported tests for 2008 to 2017 come to 0.6 for every 1,000 residents (2025 estimate), against 0.2 for Arkansas.
From Mountain View to Fifty-Six, CDC publishes no figure by town: each reads Stone County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Mountain View | 2,940 | +2.2% | 23.1% |
| Fifty-Six | 163 | +2.5% | 1.3% |
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).
Stone County, Homes
Homes in Stone County
Of Stone County's 6,820 homes, 74% are detached houses, against 70% across Arkansas; 21% are mobile homes. Half of its homes were built before 1988, close to Arkansas' 1987: 12% date from before 1960 and 24% from 2000 or later. Owners live in 76% of the occupied homes (Arkansas: 66%), so for most households a test and a fix are their own to order.
| Homes | Stone County | Arkansas |
|---|---|---|
| Housing units | 6,820 | 1,382,664 |
| Detached houses | 74% | 70% |
| In buildings of 5 or more | 2% | 10% |
| Mobile homes | 21% | 11% |
| Built before 1960 | 12% | 14% |
| Built since 2000 | 24% | 28% |
| Middle year built | 1988 | 1987 |
| Owner-occupied | 76% | 66% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.