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 Dallas County, Arkansas
EPA puts Dallas County in Zone 3, its lowest radon zone, and only 1 radon test from it is 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
31.9%
Saline County, 47 miles
- Saline
- 31.9%
- Arkansas
- 22.7%
Share at 4+ pCi/L, 47 tests, 2007 to 2016
Ground above low
None
21.3 pts below Arkansas
- Dallas
- 0.0%
- Arkansas
- 21.3%
Share of land USGS rates moderate or high potential
Tests reported
1
Too few for a share
- Dallas
- 1
- 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 Dallas 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
Dallas County, At a glance
Dallas 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 Dallas County, 2008 to 2017, laboratory
CDC holds 1 reported test for Dallas County over the 2008 to 2017 laboratory totals, a result of 1.2 pCi/L: too few to describe a county (Radon411 reads a share from 30 tests up). Dallas County beside the counties around it is how this page reads it.
What these figures count
Only 1 test was reported to CDC for Dallas 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).
Dallas County, Compared
Dallas County radon figures, compared
Calculated by Radon411CDC's largest figure for Dallas County rests on 1 test over the 2008 to 2017 laboratory totals, 0 of them at or above 4 pCi/L, so each test moves its share by 100.0 points and no rank or comparison is drawn from it. Results reached as high as 1.2 pCi/L, with a middle value of 1.2 pCi/L.
The nearest counties with a figure are Saline County (47 miles away) at 31.9%, Garland County (51 miles away) at 45.8% and Pulaski County (59 miles away) at 6.8%. 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 Dallas 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.
Dallas County, Geology
The ground under Dallas County
PredictedUSGS's geologic map puts all of Dallas County's mapped land in one class: low radon potential. All of it lies in the area the map calls West Gulf Coastal Plain, to which USGS gives a radon index of 7, in the low band (5 to 8).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| West Gulf Coastal Plain | Glauconitic, phosphatic, and carbonaceous sediments. | Low | 7 | 100% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Dallas County beside the ground around it
Across Arkansas 21.3% of the land is rated moderate; none of Dallas County's is. Of the 6 counties that border it, 2 have more moderate-potential ground, Hot Spring County the most at 24.9%.
The map rates the ground, not the air in any home.
Local help
Dallas County, Local resources
Radon testing and mitigation in Dallas 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
Dallas County, Questions
Questions about radon in Dallas County
Are radon levels high in Dallas County?
Over the 2008 to 2017 laboratory totals, 0.0% of the radon tests reported to CDC for Dallas County, Arkansas were at or above 4 pCi/L, and the median reported pre-mitigation result was 1.2 pCi/L. Of the 5 nearest counties with a figure, within 187 miles, the share of tests at or above 4 pCi/L runs from 6.8% to 45.8%.
Which counties border Dallas County?
Dallas County borders 6 counties: Clark County, Grant County, Hot Spring County, Calhoun County, Ouachita County and Cleveland County.
Products
Dallas County, Products
Testing a home in Dallas County
No CDC figure names Dallas County; the nearest county with one, Saline County (47 miles away), reported 31.9% 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 Dallas County.
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
MonitorSafetySiren
Pro4 plug-in radon detector with a display and alarm
- C-NRPP 2024/25: Not included
- Plug-in
- Alarm
- Screen
First reading: Within 48 hours
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Dallas County, Bordering counties
Counties bordering Dallas County
Calculated by Radon411- Radon levels in Clark CountyEPA zone 3
0.0%at or above 4 pCi/L
Median 1.3 pCi/L · 4 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 Hot Spring CountyEPA zone 3
0.0%at or above 4 pCi/L
Median 2.1 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 Calhoun CountyEPA zone 3
No CDC figure for 2007 to 2016; its page reads it against its own neighbours.
- Radon levels in Ouachita CountyEPA zone 3
No CDC figure for 2007 to 2016; its page reads it against its own neighbours.
Dallas County, Cities and towns
Cities and towns in Dallas County
Dallas County has been losing residents: from 6,441 in 2020 to 6,011 on July 1, 2025, a fall of 6.7% by the Census Bureau's estimates. Spread over its land, that is 9.0 people to the square mile. Fordyce alone is home to 3,141 of them, 52.3% of the total. Together its 3 incorporated places hold 61.1% of those residents; the other 38.9% live outside any of them. CDC's 1 reported test for 2008 to 2017 work out to 0.2 per 1,000 residents (2025 estimate), close to Arkansas' 0.2.
From Fordyce to Carthage, CDC publishes no figure by town: each reads Dallas County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Fordyce | 3,141 | −6.9% | 52.3% |
| Sparkman | 330 | −7.6% | 5.5% |
| Carthage | 202 | −6.0% | 3.4% |
3 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).
Dallas County, Homes
Homes in Dallas County
Of Dallas County's 3,490 homes, 71% are detached houses, against 70% across Arkansas; 17% are mobile homes. The homes are older than Arkansas' as a whole: half were built before 1978 (1987 for Arkansas), and 20% date from before 1960. 71% 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 | Dallas County | Arkansas |
|---|---|---|
| Housing units | 3,490 | 1,382,664 |
| Detached houses | 71% | 70% |
| In buildings of 5 or more | 6% | 10% |
| Mobile homes | 17% | 11% |
| Built before 1960 | 20% | 14% |
| Built since 2000 | 17% | 28% |
| Middle year built | 1978 | 1987 |
| Owner-occupied | 71% | 66% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.