Short-term kitempowerDX
Standard Radon Test short-term mail-in radon test kit
- Lab fee included
Method: Passive sampler
In home: 48 to 96 hours
Locations and reports
Radon Levels in Garland County, Arkansas
EPA puts Garland County in Zone 2, its middle radon zone, and high results are common there: 45.5% of the 44 radon tests reported to CDC (2008 to 2017, laboratory totals) came back at or above 4 pCi/L. Homes with elevated levels occur in all three zones, so only a test measures yours.
Data checked By Radon411Methodology
Share at 4+ pCi/L
45.5%
22.3 pts above AR
- Garland
- 45.5%
- Arkansas
- 23.2%
44 tests, 2008 to 2017
Median result
2.7pCi/L
Below action level
- Garland
- 2.7 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2008 to 2017
Tests reported
44
5th of 5 by tests
- Garland
- 44
- Benton
- 147
Reported to CDC before any fix, 2008 to 2017
EPA radon zone
Zone 2
Moderate potential
- 1
- Zone 2
- 3
1 highest, 3 lowest
EPA predicts 2 to 4 pCi/L indoors
Rank in Arkansas
1 of 5
Top quarter
- Garland
- 45.5%
- Garland
- 45.5%
By share, of 5 with 30+ tests
Read a result for Garland County
Starts at Garland County's median, 2.7 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 2.7 pCi/L
Between 2 and 4 pCi/L
- Under 20 to 1.9 pCi/L
- 2 to 4consider a fix
- 4 and aboveEPA says fix it
This result is between 2 and 4 pCi/L. EPA recommends considering a fix when the level is between 2 and 4 pCi/L. Garland County's median reported result, 2008 to 2017.
The data
Garland County, At a glance
Garland County at a glance
Predicted: EPA radon zone
EPA Zone 2: moderate predicted potential
Garland County is a
USGS geologic potential: Moderate across 88% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Garland County, 2008 to 2017, laboratory
Under 2 pCi/L: 39%2 to 4 pCi/L: 16%4 pCi/L and above: 45%
Of 44 pre-mitigation tests reported to CDC, not homes in this area.
| Result band | Tests Measured | Share Measured |
|---|---|---|
| Under 2 pCi/L | 17 | 38.6% |
| 2 to 4 pCi/L | 7 | 15.9% |
| 4 pCi/L and above | 20 | 45.5% |
What these figures count
These are the 44 tests reported to CDC for Garland County over 2008 to 2017 (laboratory totals), many from homes being sold or already suspected of a problem: they describe the county's reported tests, not this house.
Measured: CDC tracking data. Figure above: 2008 to 2017, laboratory. Measured data period: 2005 to 2017 (every CDC figure on file).
Garland County, Compared
Garland County radon figures, compared
Calculated by Radon411In Garland County, about 5 in 10 reported tests over the 2008 to 2017 laboratory totals (20 of 44) were at or above EPA's action level. Against the national pool of 35.7%, the gap is 9.8 points higher. Across 58 Arkansas counties pooled together, 23.2% of tests reached that level, so Garland County runs 22.3 points above its state.
Saline County, the one bordering county with a figure for the same period, reported 35.8%. By share, Garland County is 1st of 5 Arkansas counties with 30 or more tests for the same period.
Half the tests came in under 2.7 pCi/L and half over it; the single highest reached 59.1 pCi/L. Below the action level, 17 tests (38.6%) came in under 2 pCi/L, against 55.5% statewide, and 7 tests (15.9%) fell between 2 and 4, against 21.3% statewide.
Zone 2 on EPA's map (predicted average between 2 and 4 pCi/L) and a 45.5% share point the same way here. USGS geology rates 88% of the county's land moderate radon potential.
CDC's ten-year totals for Garland County went from 38 tests (2005 to 2014) to 44 (2008 to 2017), the share going from 52.6% to 45.5%.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Garland County, Geology
The ground under Garland County
PredictedMost of the ground under Garland County is one class on USGS's geologic map: 87.7% of its land is moderate radon potential, with 12.3% low. The map puts 87.7% of Garland County in the area it calls Central Ouachita Mountains and 12.3% in Athens Plateau/Fourche Mountains. 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 |
|---|---|---|---|---|
| Central Ouachita Mountains | Intensely deformed Ordovician and Silurian shales and sandstones with minor chert and limestone. | Moderate | 9 | 87.7% |
| Athens Plateau/Fourche Mountains | Mississippian and Pennsylvanian sandstones and shales. | Low | 8 | 12.3% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Garland County beside the ground around it
Garland County has more moderate-potential ground than Arkansas as a whole: 87.7% of its land against 21.3%. Of the 5 counties that border it, none has as large a share of moderate-potential ground; Montgomery County comes nearest at 72.4%.
The map rates the ground, not the air in any home.
Local help
Garland County, Local resources
Radon testing and mitigation in Garland 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
Garland County, Questions
Questions about radon in Garland County
Are radon levels high in Garland County?
Over the 2008 to 2017 laboratory totals, 45.5% of the radon tests reported to CDC for Garland County, Arkansas were at or above 4 pCi/L, and the median reported pre-mitigation result was 2.7 pCi/L. Of 5 Arkansas counties with 30 or more tests for the same period, none reported a higher share; pooled, the state comes to 23.2%.
Which counties border Garland County?
Garland County borders 5 counties: Hot Spring County, Saline County, Perry County, Montgomery County and Yell County.
Products
Garland County, Products
Testing a home in Garland County
In Garland County, 45.5% of 44 tests reported to CDC over the 2008 to 2017 laboratory totals reached 4 pCi/L, against 23.2% pooled across Arkansas. In Zone 2 a short-term kit (2 to 90 days) is the quick first check in Garland 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
Monitor
EcoQube Wi-Fi continuous radon monitor
- C-NRPP 2024/25: Approved
- Plug-in
- Wi-Fi
- App only
Method: Ion chamber
First reading: Within 10 minutes
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Garland County, Bordering counties
Counties bordering Garland County
Calculated by Radon411- Radon levels in Saline CountyEPA zone 3
35.8%at or above 4 pCi/L
Median 2.4 pCi/L · 53 tests · 9.7 points below Garland County
- Radon levels in Hot Spring CountyEPA zone 3
0.0%at or above 4 pCi/L
Median 2.1 pCi/L · 1 test · 45.5 points below Garland County
- Radon levels in Montgomery CountyEPA zone 2
0.0%at or above 4 pCi/L
Median 0.6 pCi/L · 1 test · 45.5 points below Garland County
- Radon levels in Yell CountyEPA zone 3
0.0%at or above 4 pCi/L
Median 0.5 pCi/L · 2 tests · 45.5 points below Garland County
- Radon levels in Perry CountyEPA zone 3
No CDC figure for 2008 to 2017; its page reads it against its own neighbours.
Garland County, Cities and towns
Cities and towns in Garland County
About 99,695 people live in Garland County by the Census Bureau's estimate for July 1, 2025, 564 fewer than in 2020 (−0.6%). That works out to 147 people per square mile of land. Its largest town, Hot Springs, has 37,979 residents, 38.1% of the total. Together its 4 incorporated places hold 39.3% of those residents; the other 60.7% live outside any of them. Testing is reported here more often than across the state: CDC's 44 reported tests for 2008 to 2017 come to 0.4 for every 1,000 residents (2025 estimate), against 0.2 for Arkansas.
From Hot Springs to Lonsdale, CDC publishes no figure by town: each reads Garland County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Hot Springs | 37,979 | +0.1% | 38.1% |
| Mountain Pine | 586 | +0.9% | 0.6% |
| Fountain Lake | 473 | −0.4% | 0.5% |
| Lonsdale | 106 | +2.9% | 0.1% |
4 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).
Garland County, Homes
Homes in Garland County
Of Garland County's 52,570 homes, 65% are detached houses, against 70% across Arkansas; 14% are mobile homes. Half of its homes were built before 1984, close to Arkansas' 1987: 17% date from before 1960 and 26% from 2000 or later. 69% 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 | Garland County | Arkansas |
|---|---|---|
| Housing units | 52,570 | 1,382,664 |
| Detached houses | 65% | 70% |
| In buildings of 5 or more | 12% | 10% |
| Mobile homes | 14% | 11% |
| Built before 1960 | 17% | 14% |
| Built since 2000 | 26% | 28% |
| Middle year built | 1984 | 1987 |
| Owner-occupied | 69% | 66% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.