Short-term kitFirst Alert
RD1 short-term charcoal radon test kit
- Lab fee included
Method: Charcoal
In home: 2 to 4 days
Locations and reports
Radon Levels in Lonoke County, Arkansas
EPA puts Lonoke County in Zone 3, its lowest radon zone, and only 4 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, 24 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
- Lonoke
- 0.0%
- Arkansas
- 21.3%
Share of land USGS rates moderate or high potential
Tests reported
4
Too few for a share
- Lonoke
- 4
- 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 Lonoke 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
Lonoke County, At a glance
Lonoke 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 Lonoke County, 2008 to 2017, laboratory
CDC holds 4 reported tests for Lonoke County over the 2008 to 2017 laboratory totals, with a median of 1.4 pCi/L: too few to describe a county (Radon411 reads a share from 30 tests up). Lonoke County beside the counties around it is how this page reads it.
What these figures count
Only 4 tests were reported to CDC for Lonoke 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).
Lonoke County, Compared
Lonoke County radon figures, compared
Calculated by Radon411CDC's largest figure for Lonoke County rests on 4 tests over the 2008 to 2017 laboratory totals, 0 of them at or above 4 pCi/L, so each test moves its share by 25.0 points and no rank or comparison is drawn from it. Results reached as high as 2.6 pCi/L, with a middle value of 1.4 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 (45 miles away) at 31.9%, Garland County (73 miles away) at 45.8% and Washington County (156 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 Lonoke 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.
Lonoke County, Geology
The ground under Lonoke County
PredictedUSGS's geologic map puts all of Lonoke County's mapped land in one class: low radon potential. The map puts 94.7% of Lonoke County in the area it calls Mississippi Alluvial Plain and 5.3% in Athens Plateau/Fourche Mountains. USGS gives both 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 |
|---|---|---|---|---|
| Mississippi Alluvial Plain | Alluvial sand, silt, gravel, and clay. | Low | 8 | 94.7% |
| Athens Plateau/Fourche Mountains | Mississippian and Pennsylvanian sandstones and shales. | Low | 8 | 5.3% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Lonoke County beside the ground around it
Across Arkansas 21.3% of the land is rated moderate; none of Lonoke 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
Lonoke County, Local resources
Radon testing and mitigation in Lonoke 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
Lonoke County, Questions
Questions about radon in Lonoke County
Are radon levels high in Lonoke County?
Over the 2008 to 2017 laboratory totals, 0.0% of the radon tests reported to CDC for Lonoke County, Arkansas were at or above 4 pCi/L, and the median reported pre-mitigation result was 1.4 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 Lonoke County?
Lonoke County borders 6 counties: Prairie County, Pulaski County, Faulkner County, Jefferson County, White County and Arkansas County.
Products
Lonoke County, Products
Testing a home in Lonoke County
No CDC figure names Lonoke County; the nearest county with one, Pulaski County (24 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 Lonoke 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
EcoQube Flex battery digital radon monitor with an e-ink screen
- C-NRPP 2024/25: Not included
- Battery
- Bluetooth
- Alarm
- Screen, app
Method: Ion chamber
First reading: Within 15 minutes
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Lonoke County, Bordering counties
Counties bordering Lonoke County
Calculated by Radon411- Radon levels in Prairie CountyEPA zone 3
100.0%at or above 4 pCi/L
Median 4.5 pCi/L · 1 test
- 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 Faulkner CountyEPA zone 3
5.3%at or above 4 pCi/L
Median 1.3 pCi/L · 19 tests
- Radon levels in Jefferson CountyEPA zone 3
0.0%at or above 4 pCi/L
Median 0.5 pCi/L · 2 tests
- Radon levels in White CountyEPA zone 3
0.0%at or above 4 pCi/L
Median 1.1 pCi/L · 6 tests
- Radon levels in Arkansas CountyEPA zone 3
0.0%at or above 4 pCi/L
Median 1.3 pCi/L · 1 test
Lonoke County, Cities and towns
Cities and towns in Lonoke County
The Census Bureau estimates 76,664 residents in Lonoke County for July 1, 2025, 2,599 more than in 2020 (+3.5%). That works out to 99 people per square mile of land. Its largest town, Cabot, has 27,711 residents, 36.1% of the total. Together its 10 incorporated places hold 63.0% of those residents; the other 37.0% live outside any of them. Reported testing is thin here: 4 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 Cabot to Coy, CDC publishes no figure by town: each reads Lonoke County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Cabot | 27,711 | +4.3% | 36.1% |
| Ward | 7,258 | +17.7% | 9.5% |
| Lonoke | 4,299 | +0.9% | 5.6% |
| Austin | 4,017 | +13.3% | 5.2% |
| England | 2,409 | −2.3% | 3.1% |
| Carlisle | 1,982 | −3.0% | 2.6% |
| Humnoke | 220 | −1.3% | 0.3% |
| Keo | 202 | −0.5% | 0.3% |
| Allport | 90 | Level | 0.1% |
| Coy | 90 | −2.2% | 0.1% |
10 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).
Lonoke County, Homes
Homes in Lonoke County
Lonoke County is a place of houses on their own lots: 76% of its 30,566 homes are detached single-family houses, against 70% across Arkansas. Much of Lonoke County is recent building: 44% of its homes have gone up since 2000 and the middle year built is 1997, against 1987 for Arkansas. 74% 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 | Lonoke County | Arkansas |
|---|---|---|
| Housing units | 30,566 | 1,382,664 |
| Detached houses | 76% | 70% |
| In buildings of 5 or more | 4% | 10% |
| Mobile homes | 14% | 11% |
| Built before 1960 | 7% | 14% |
| Built since 2000 | 44% | 28% |
| Middle year built | 1997 | 1987 |
| Owner-occupied | 74% | 66% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.