Radon Compass

Radon in Arkansas

About 1 in 4 homes tested in Arkansas were at or above the EPA action level of 4 pCi/L.

450 homes tested, 2008–2017
  • Below 2 pCi/L: 56%
  • 2 to 4 pCi/L: 22%
  • 4 pCi/L or more: 23%
The line marks the EPA action level, 4 pCi/L.

The EPA puts 0 of Arkansas's 75 counties in Zone 1, its highest radon category, 14 in Zone 2 and 61 in Zone 3.

Every county in Arkansas

Sorted by the share of homes tested at or above 4 pCi/L. Select a county for local details and costs.

CountyHomes testedAt or above 4MedianEPA zone
Miller County1 tests––3
Prairie County1 tests––3
Mississippi County1 tests––3
Johnson County2 tests––3
Baxter County16 tests––2
Fulton County2 tests––2
Monroe County1 tests––3
Randolph County2 tests––2
Searcy County3 tests––2
Garland County
46%2.7 pCi/L2
Saline County
36%2.4 pCi/L3
Benton County
34%2.2 pCi/L2
Conway County3 tests––3
Boone County12 tests––2
Carroll County12 tests––2
Independence County10 tests––2
Craighead County7 tests––3
Sharp County4 tests––2
Madison County5 tests––3
Pope County9 tests––3
Washington County
13%2.2 pCi/L3
Cleburne County7 tests––3
Crawford County7 tests––3
Pulaski County
6%0.9 pCi/L3
Faulkner County13 tests––3
Sebastian County11 tests––3
Arkansas County1 tests––3
Bradley County1 tests––3
Clark County3 tests––3
Clay County1 tests––3
Cleveland County3 tests––3
Columbia County2 tests––3
Crittenden County1 tests––3
Dallas County1 tests––3
Franklin County1 tests––3
Grant County1 tests––3
Greene County3 tests––3
Hot Spring County1 tests––3
Howard County2 tests––3
Izard County3 tests––2
Jackson County3 tests––3
Jefferson County2 tests––3
Lawrence County1 tests––3
Little River County1 tests––3
Logan County2 tests––3
Lonoke County3 tests––3
Marion County1 tests––2
Montgomery County1 tests––2
Newton County1 tests––3
Ouachita County2 tests––3
Phillips County1 tests––3
Polk County1 tests––3
Sevier County2 tests––3
Stone County6 tests––2
Union County1 tests––3
Van Buren County4 tests––3
White County5 tests––3
Yell County1 tests––3
Ashley CountyNo data––3
Calhoun CountyNo data––3
Chicot CountyNo data––3
Cross CountyNo data––3
Desha CountyNo data––3
Drew CountyNo data––3
Hempstead CountyNo data––3
Lafayette CountyNo data––3
Lee CountyNo data––3
Lincoln CountyNo data––3
Nevada CountyNo data––3
Perry CountyNo data––3
Pike CountyNo data––3
Poinsett CountyNo data––3
Scott CountyNo data––3
St. Francis CountyNo data––3
Woodruff CountyNo data––3

"–" means fewer than 20 tests or no lab data, too few for a reliable figure.

Sources

Last updated October 2026. How we calculate these numbers.