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 Howard County, Arkansas
EPA puts Howard County in Zone 3, its lowest radon zone, and only 3 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
45.8%
Garland County, 59 miles
- Garland
- 45.8%
- Arkansas
- 22.7%
Share at 4+ pCi/L, 48 tests, 2007 to 2016
Ground above low
1.5%
19.8 pts below Arkansas
- Howard
- 1.5%
- Arkansas
- 21.3%
Share of land USGS rates moderate or high potential
Tests reported
5
Too few for a share
- Howard
- 5
- Needed
- 30
2006 to 2015, 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 Howard 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
Howard County, At a glance
Howard County at a glance
Predicted: EPA radon zone
EPA Zone 3: lower predicted potential
USGS geologic potential: Low across 99% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Howard County, 2008 to 2017, laboratory
CDC holds 3 reported tests for Howard County over the 2008 to 2017 laboratory totals, with a median of 2.6 pCi/L: too few to describe a county (Radon411 reads a share from 30 tests up). Howard County beside the counties around it is how this page reads it.
What these figures count
Only 3 tests were reported to CDC for Howard 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).
Howard County, Compared
Howard County radon figures, compared
Calculated by Radon411CDC's largest figure for Howard County rests on 5 tests over the 2006 to 2015 laboratory totals, 2 of them at or above 4 pCi/L, so each test moves its share by 20.0 points and no rank or comparison is drawn from it. Results reached as high as 9.7 pCi/L, with a middle value of 3.7 pCi/L.
The nearest counties with a figure are Garland County (59 miles away) at 45.8%, Saline County (85 miles away) at 31.9% and Pulaski County (107 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 Howard County in Zone 3, its lowest label: a predicted county average under 2 pCi/L. USGS geology rates 99% of the county's land low radon potential.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Howard County, Geology
The ground under Howard County
PredictedMost of the ground under Howard County is one class on USGS's geologic map: 98.5% of its land is low radon potential, with 1.5% moderate. The map puts 54.8% of Howard County in the area it calls West Gulf Coastal Plain and 43.7% in Athens Plateau/Fourche Mountains, with one smaller area beside them. USGS gives the first a radon index of 7 and the second 8, both 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 | 54.8% |
| Athens Plateau/Fourche Mountains | Mississippian and Pennsylvanian sandstones and shales. | Low | 8 | 43.7% |
| Central Ouachita Mountains | Intensely deformed Ordovician and Silurian shales and sandstones with minor chert and limestone. | Moderate | 9 | 1.5% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Howard County beside the ground around it
Arkansas as a whole has more moderate-potential ground than Howard County: 21.3% of its land, against 1.5% here. Of the 6 counties that border it, 3 have more moderate-potential ground, Montgomery County the most at 72.4%.
The map rates the ground, not the air in any home.
Local help
Howard County, Local resources
Radon testing and mitigation in Howard 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
Howard County, Questions
Questions about radon in Howard County
Are radon levels high in Howard County?
Over the 2008 to 2017 laboratory totals, 0.0% of the radon tests reported to CDC for Howard County, Arkansas were at or above 4 pCi/L, and the median reported pre-mitigation result was 2.6 pCi/L. Of the 5 nearest counties with a figure, within 156 miles, the share of tests at or above 4 pCi/L runs from 6.8% to 45.8%.
Which counties border Howard County?
Howard County borders 6 counties: Pike County, Sevier County, Polk County, Hempstead County, Little River County and Montgomery County.
Products
Howard County, Products
Testing a home in Howard County
No CDC figure names Howard County; the nearest county with one, Garland County (59 miles away), reported 45.8% 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 Howard 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
Monitor
View Radon Wi-Fi radon monitor with an e-paper display
- C-NRPP 2024/25: Approved
- Battery
- Wi-Fi, Bluetooth
- Screen, app
Method: Alpha spectrometry
Readings: Every 60 minutes
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Howard County, Bordering counties
Counties bordering Howard County
Calculated by Radon411- Radon levels in Sevier CountyEPA zone 3
0.0%at or above 4 pCi/L
Median 1.1 pCi/L · 2 tests
- Radon levels in Polk CountyEPA zone 3
0.0%at or above 4 pCi/L
Median 2.2 pCi/L · 1 test
- Radon levels in Little River CountyEPA zone 3
0.0%at or above 4 pCi/L
Median 0.9 pCi/L · 1 test
- Radon levels in Montgomery CountyEPA zone 2
0.0%at or above 4 pCi/L
Median 0.6 pCi/L · 1 test
- Radon levels in Pike CountyEPA zone 3
No CDC figure for 2007 to 2016; its page reads it against its own neighbours.
- Radon levels in Hempstead CountyEPA zone 3
No CDC figure for 2007 to 2016; its page reads it against its own neighbours.
Howard County, Cities and towns
Cities and towns in Howard County
About 12,306 people live in Howard County by the Census Bureau's estimate for July 1, 2025, 454 fewer than in 2020 (−3.6%). That works out to 21 people per square mile of land. Its largest town, Nashville, has 3,945 residents, 32.1% of the total. Together its 4 incorporated places hold 49.1% of those residents; the other 50.9% live outside any of them. Testing is reported here more often than across the state: CDC's 5 reported tests for 2006 to 2015 come to 0.4 for every 1,000 residents (2025 estimate), against 0.2 for Arkansas.
From Nashville to Tollette, CDC publishes no figure by town: each reads Howard County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Nashville | 3,945 | −4.9% | 32.1% |
| Mineral Springs | 1,036 | −4.2% | 8.4% |
| Dierks | 879 | −3.2% | 7.1% |
| Tollette | 185 | −3.1% | 1.5% |
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).
Howard County, Homes
Homes in Howard County
Of Howard County's 6,162 homes, 74% are detached houses, against 70% across Arkansas; 19% are mobile homes. The homes are older than Arkansas' as a whole: half were built before 1979 (1987 for Arkansas), and 19% 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 | Howard County | Arkansas |
|---|---|---|
| Housing units | 6,162 | 1,382,664 |
| Detached houses | 74% | 70% |
| In buildings of 5 or more | 2% | 10% |
| Mobile homes | 19% | 11% |
| Built before 1960 | 19% | 14% |
| Built since 2000 | 22% | 28% |
| Middle year built | 1979 | 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.