Radon levels in Arkansas: Low

The model predicts a population-weighted basement average of 1.8 pCi/L across Arkansas's 75 counties - close to the US average of 1.8 pCi/L. Above-ground floors average 0.9 pCi/L.

Predicted (model estimate). The pCi/L figures on this page are long-term area averages from a peer-reviewed national model built on millions of real radon tests (2001-2021). They describe the typical home in this area - not your home, which can be several times higher or lower. The EPA radon zone is a separate, 1993 county-level classification. How the numbers work.

0 / 75

EPA Zone 1 counties (0%)

14 / 61

Zone 2 / Zone 3 counties

0

counties predicted ≥ 4 pCi/L

0%

of ZIP codes predicted ≥ 4 pCi/L

Arkansas counties by predicted radon

Sorted highest to lowest predicted basement average. 75 counties.

CountyPredicted basementUpstairsGradeEPA zoneZIPs
Boone County2.3 pCi/L1.2ModerateEPA Zone 23
Carroll County2.3 pCi/L1.1ModerateEPA Zone 26
Madison County2.2 pCi/L1.1ModerateEPA Zone 39
Searcy County2.2 pCi/L1.1ModerateEPA Zone 26
Benton County2.1 pCi/L1.2ModerateEPA Zone 217
Polk County2.1 pCi/L1.0ModerateEPA Zone 36
Stone County2.1 pCi/L1.0ModerateEPA Zone 27
Washington County2.1 pCi/L1.2ModerateEPA Zone 314
Baxter County2.1 pCi/L1.1ModerateEPA Zone 211
Newton County2.1 pCi/L1.0ModerateEPA Zone 310
Fulton County2.0 pCi/L1.1ModerateEPA Zone 28
Independence County2.0 pCi/L1.1ModerateEPA Zone 213
Garland County2.0 pCi/L1.1LowEPA Zone 28
Marion County2.0 pCi/L1.0LowEPA Zone 27
Montgomery County1.9 pCi/L1.0LowEPA Zone 27
Sharp County1.9 pCi/L1.0LowEPA Zone 27
Cleburne County1.9 pCi/L1.0LowEPA Zone 310
Izard County1.9 pCi/L0.9LowEPA Zone 214
Van Buren County1.8 pCi/L1.0LowEPA Zone 37
Perry County1.8 pCi/L0.9LowEPA Zone 36
Scott County1.8 pCi/L0.9LowEPA Zone 34
Yell County1.8 pCi/L0.9LowEPA Zone 310
Greene County1.8 pCi/L0.8LowEPA Zone 35
Johnson County1.8 pCi/L0.9LowEPA Zone 38
Randolph County1.8 pCi/L1.1LowEPA Zone 28
Conway County1.8 pCi/L0.9LowEPA Zone 37
Crawford County1.8 pCi/L0.8LowEPA Zone 38
Franklin County1.8 pCi/L0.9LowEPA Zone 36
Logan County1.8 pCi/L0.9LowEPA Zone 39
Pope County1.8 pCi/L0.9LowEPA Zone 38
Cross County1.8 pCi/L0.9LowEPA Zone 34
Pike County1.8 pCi/L0.9LowEPA Zone 37
White County1.8 pCi/L0.9LowEPA Zone 312
Faulkner County1.7 pCi/L0.9LowEPA Zone 38
Lawrence County1.7 pCi/L0.9LowEPA Zone 310
Saline County1.7 pCi/L0.9LowEPA Zone 310
Hot Spring County1.7 pCi/L0.9LowEPA Zone 33
Clark County1.7 pCi/L0.8LowEPA Zone 34
Craighead County1.7 pCi/L1.0LowEPA Zone 310
Clay County1.6 pCi/L0.9LowEPA Zone 310
Howard County1.6 pCi/L0.8LowEPA Zone 34
Lonoke County1.6 pCi/L0.8LowEPA Zone 39
Jackson County1.6 pCi/L0.8LowEPA Zone 35
Sebastian County1.6 pCi/L0.8LowEPA Zone 312
Sevier County1.6 pCi/L0.8LowEPA Zone 34
Grant County1.6 pCi/L0.9LowEPA Zone 34
St. Francis County1.6 pCi/L0.9LowEPA Zone 37
Poinsett County1.6 pCi/L0.8LowEPA Zone 37
Prairie County1.6 pCi/L0.8LowEPA Zone 35
Monroe County1.6 pCi/L0.8LowEPA Zone 34
Phillips County1.6 pCi/L0.8LowEPA Zone 37
Woodruff County1.6 pCi/L0.8LowEPA Zone 33
Cleveland County1.6 pCi/L0.8LowEPA Zone 33
Mississippi County1.6 pCi/L0.8LowEPA Zone 312
Ouachita County1.6 pCi/L0.8LowEPA Zone 35
Lee County1.6 pCi/L0.8LowEPA Zone 34
Pulaski County1.6 pCi/L0.8LowEPA Zone 320
Crittenden County1.5 pCi/L0.8LowEPA Zone 38
Dallas County1.5 pCi/L0.8LowEPA Zone 34
Lincoln County1.5 pCi/L0.8LowEPA Zone 34
Little River County1.5 pCi/L0.7LowEPA Zone 35
Chicot County1.5 pCi/L0.8LowEPA Zone 33
Arkansas County1.5 pCi/L0.8LowEPA Zone 310
Bradley County1.5 pCi/L0.8LowEPA Zone 34
Calhoun County1.5 pCi/L0.7LowEPA Zone 33
Hempstead County1.5 pCi/L0.8LowEPA Zone 37
Columbia County1.5 pCi/L0.8LowEPA Zone 34
Miller County1.5 pCi/L0.7LowEPA Zone 34
Ashley County1.4 pCi/L0.7LowEPA Zone 36
Jefferson County1.4 pCi/L0.8LowEPA Zone 39
Nevada County1.4 pCi/L0.8LowEPA Zone 34
Union County1.4 pCi/L0.8LowEPA Zone 36
Desha County1.4 pCi/L0.7LowEPA Zone 37
Drew County1.4 pCi/L0.7LowEPA Zone 34
Lafayette County1.4 pCi/L0.6LowEPA Zone 35

Arkansas radon questions

Is radon high in Arkansas?
Arkansas's population-weighted predicted basement average is 1.8 pCi/L, close to the US average of 1.8. 0 of its 75 modeled counties are predicted at or above the EPA action level of 4 pCi/L, 12 are in the 2-4 "consider fixing" range and 63 are below 2. 0% of Arkansas ZIP codes are predicted at 4 or higher.
Which Arkansas county has the highest radon?
Boone County has the highest predicted basement average in Arkansas at 2.3 pCi/L (EPA Zone 2). The lowest is Lafayette County at 1.4 pCi/L. These are modeled area averages; individual homes in any county can test far higher.
How many EPA Zone 1 counties are in Arkansas?
0 of Arkansas's 75 counties (0%) are EPA Zone 1 (highest potential), 14 are Zone 2 and 61 are Zone 3. The EPA zone map dates from 1993; the predicted values on this page come from a 2001-2021 model built on millions of actual tests, so the two can disagree for a given county.
Should I test for radon in Arkansas?
Yes. Even though Arkansas's predicted average is below 2 pCi/L, the EPA recommends every home be tested - radon varies house to house, and 13% of Arkansas ZIP codes are still predicted at 2 pCi/L or higher.

Arkansas radon program

Many states offer free or discounted test kits and keep lists of certified mitigators. Find the Arkansas radon office through the EPA state radon contacts page. Then read how to test and what mitigation costs.