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 Baxter County, Arkansas
EPA puts Baxter County in Zone 2, its middle radon zone, and only 20 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, 105 miles
- Pulaski
- 6.8%
- Arkansas
- 22.7%
Share at 4+ pCi/L, 103 tests, 2007 to 2016
Ground above low
100.0%
78.7 pts above Arkansas
- Baxter
- 100.0%
- Arkansas
- 21.3%
Share of land USGS rates moderate or high potential
Tests reported
27
Too few for a share
- Baxter
- 27
- Needed
- 30
2005 to 2014, 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 Baxter 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
Baxter County, At a glance
Baxter County at a glance
Predicted: EPA radon zone
EPA Zone 2: moderate predicted potential
Baxter County is a
USGS geologic potential: Moderate across 100% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Baxter County, 2008 to 2017, laboratory
CDC holds 20 reported tests for Baxter County over the 2008 to 2017 laboratory totals, with a median of 5.3 pCi/L: too few to describe a county (Radon411 reads a share from 30 tests up). Baxter County beside the counties around it is how this page reads it.
What these figures count
Only 20 tests were reported to CDC for Baxter 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).
Baxter County, Compared
Baxter County radon figures, compared
Calculated by Radon411CDC's largest figure for Baxter County rests on 27 tests over the 2005 to 2014 laboratory totals, 15 of them at or above 4 pCi/L, so each test moves its share by 3.7 points and no rank or comparison is drawn from it. Results reached as high as 39.0 pCi/L, with a middle value of 4.4 pCi/L.
The nearest counties with a figure are Pulaski County (105 miles away) at 6.8%, Benton County (107 miles away) at 31.0% and Washington County (107 miles away) at 14.3%. 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 Baxter County in Zone 2, its middle label: a predicted county average between 2 and 4 pCi/L. USGS geology rates 100% of the county's land moderate radon potential.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Baxter County, Geology
The ground under Baxter County
PredictedUSGS's geologic map puts all of Baxter County's mapped land in one class: moderate radon potential. The map puts 88.6% of Baxter County in the area it calls Salem Plateau and 11.0% in Springfield Plateau. USGS gives both a radon index of 9, in the moderate band (9 to 11).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Salem Plateau | Ordovician dolomite. | Moderate | 9 | 88.6% |
| Springfield Plateau | Mississippian limestone, shale, and sandstone. | Moderate | 9 | 11.0% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Baxter County beside the ground around it
Baxter County has more moderate-potential ground than Arkansas as a whole: 100% of its land against 21.3%. Of the 6 counties that border it, none has as large a share of moderate-potential ground; Izard County comes nearest at 100%.
The map rates the ground, not the air in any home.
Local help
Baxter County, Local resources
Radon testing and mitigation in Baxter 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
Baxter County, Questions
Questions about radon in Baxter County
Are radon levels high in Baxter County?
Over the 2008 to 2017 laboratory totals, 65.0% of the radon tests reported to CDC for Baxter County, Arkansas were at or above 4 pCi/L, and the median reported pre-mitigation result was 5.3 pCi/L. Of the 5 nearest counties with a figure, within 127 miles, the share of tests at or above 4 pCi/L runs from 6.8% to 45.8%.
Which counties border Baxter County?
Baxter County borders 6 counties: Marion County, AR, Stone County, AR, Izard County, AR, Ozark County, MO, Fulton County, AR and Searcy County, AR.
Products
Baxter County, Products
Testing a home in Baxter County
No CDC figure names Baxter County; the nearest county with one, Pulaski County (105 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 Baxter 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
MonitorAEGTEST
HOUND-1011S rechargeable radon detector with a screen
- C-NRPP 2024/25: Not included
- Battery
- Alarm
- Screen
Method: Semiconductor sensor
First reading: Within 12 hours
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Baxter County, Bordering counties
Counties bordering Baxter County
Calculated by Radon411- Radon levels in Fulton County, AREPA zone 2
66.7%at or above 4 pCi/L
Median 9.6 pCi/L · 3 tests
- Radon levels in Searcy County, AREPA zone 2
50.0%at or above 4 pCi/L
Median 3.5 pCi/L · 4 tests
- Radon levels in Ozark County, MOEPA zone 2
25.0%at or above 4 pCi/L
Median 0.4 pCi/L · 8 tests
- Radon levels in Marion County, AREPA zone 2
0.0%at or above 4 pCi/L
Median 0.1 pCi/L · 1 test
- Radon levels in Stone County, AREPA zone 2
0.0%at or above 4 pCi/L
Median 1.1 pCi/L · 7 tests
- Radon levels in Izard County, AREPA zone 2
0.0%at or above 4 pCi/L
Median 1.1 pCi/L · 3 tests
Baxter County, Cities and towns
Cities and towns in Baxter County
The Census Bureau estimates 42,982 residents in Baxter County for July 1, 2025, 1,290 more than in 2020 (+3.1%). That works out to 78 people per square mile of land. Its largest town, Mountain Home, has 13,373 residents, 31.1% of the total. Testing is reported here more often than across the state: CDC's 27 reported tests for 2005 to 2014 come to 0.6 for every 1,000 residents (2025 estimate), against 0.2 for Arkansas.
From Mountain Home to Big Flat, CDC publishes no figure by town: each reads Baxter County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Mountain Home | 13,373 | +4.2% | 31.1% |
| Gassville | 2,205 | +1.5% | 5.1% |
| Cotter | 946 | +6.3% | 2.2% |
| Lakeview | 783 | +0.9% | 1.8% |
| Salesville | 524 | +10.5% | 1.2% |
| Norfork | 482 | +2.3% | 1.1% |
| Briarcliff | 260 | +12.1% | 0.6% |
| Big Flatextends beyond Baxter County | 87 | +1.2% | Counted whole |
8 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). A place that extends beyond Baxter County is counted whole, so it has no share.
Baxter County, Homes
Homes in Baxter County
Of Baxter County's 22,836 homes, 75% are detached houses, against 70% across Arkansas; 13% are mobile homes. Half of its homes were built before 1983, close to Arkansas' 1987: 11% date from before 1960 and 20% from 2000 or later. 75% 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 | Baxter County | Arkansas |
|---|---|---|
| Housing units | 22,836 | 1,382,664 |
| Detached houses | 75% | 70% |
| In buildings of 5 or more | 5% | 10% |
| Mobile homes | 13% | 11% |
| Built before 1960 | 11% | 14% |
| Built since 2000 | 20% | 28% |
| Middle year built | 1983 | 1987 |
| Owner-occupied | 75% | 66% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.