- Under 10%
- 10–20%
- 20–30%
- 30–40%
- 40% or more
- No data
Counties
| County | Tests | % ≥ 4 pCi/L | Median (pCi/L) | EPA zone (1993) | Source |
|---|---|---|---|---|---|
| Arkansas County | 1 | 0% | 1.3 | Zone 3 | Radon test results from laboratories through 2017 |
| Ashley County | — | — | — | Zone 3 | — |
| Baxter County | 20 | 65% | 5.3 | Zone 2 | Radon test results from laboratories through 2017 |
| Benton County | 147 | 34% | 2.2 | Zone 2 | Radon test results from laboratories through 2017 |
| Boone County | 22 | 32% | 2.8 | Zone 2 | Radon test results from laboratories through 2017 |
| Bradley County | 1 | 0% | 0.1 | Zone 3 | Radon test results from laboratories through 2017 |
| Calhoun County | — | — | — | Zone 3 | — |
| Carroll County | 17 | 29% | 2.0 | Zone 2 | Radon test results from laboratories through 2017 |
| Chicot County | — | — | — | Zone 3 | — |
| Clark County | 4 | 0% | 1.3 | Zone 3 | Radon test results from laboratories through 2017 |
| Clay County | 1 | 0% | 0.2 | Zone 3 | Radon test results from laboratories through 2017 |
| Cleburne County | 9 | 11% | 2.1 | Zone 3 | Radon test results from laboratories through 2017 |
| Cleveland County | 3 | 0% | 0.1 | Zone 3 | Radon test results from laboratories through 2017 |
| Columbia County | 2 | 0% | 0.6 | Zone 3 | Radon test results from laboratories through 2017 |
| Conway County | 3 | 33% | 2.1 | Zone 3 | Radon test results from laboratories through 2017 |
| Craighead County | 8 | 25% | 1.1 | Zone 3 | Radon test results from laboratories through 2017 |
| Crawford County | 9 | 11% | 0.7 | Zone 3 | Radon test results from laboratories through 2017 |
| Crittenden County | 1 | 0% | 0.1 | Zone 3 | Radon test results from laboratories through 2017 |
| Cross County | — | — | — | Zone 3 | — |
| Dallas County | 1 | 0% | 1.2 | Zone 3 | Radon test results from laboratories through 2017 |
| Desha County | — | — | — | Zone 3 | — |
| Drew County | — | — | — | Zone 3 | — |
| Faulkner County | 19 | 5% | 1.3 | Zone 3 | Radon test results from laboratories through 2017 |
| Franklin County | 1 | 0% | 0.1 | Zone 3 | Radon test results from laboratories through 2017 |
| Fulton County | 2 | 50% | 5.9 | Zone 2 | Radon test results from laboratories through 2017 |
| Garland County | 44 | 45% | 2.7 | Zone 2 | Radon test results from laboratories through 2017 |
| Grant County | 1 | 0% | 0.9 | Zone 3 | Radon test results from laboratories through 2017 |
| Greene County | 3 | 0% | 1.4 | Zone 3 | Radon test results from laboratories through 2017 |
| Hempstead County | — | — | — | Zone 3 | — |
| Hot Spring County | 1 | 0% | 2.1 | Zone 3 | Radon test results from laboratories through 2017 |
| Howard County | 3 | 0% | 2.6 | Zone 3 | Radon test results from laboratories through 2017 |
| Independence County | 15 | 27% | 2.4 | Zone 2 | Radon test results from laboratories through 2017 |
| Izard County | 4 | 0% | 1.2 | Zone 2 | Radon test results from laboratories through 2017 |
| Jackson County | 3 | 0% | 0.1 | Zone 3 | Radon test results from laboratories through 2017 |
| Jefferson County | 2 | 0% | 0.5 | Zone 3 | Radon test results from laboratories through 2017 |
| Johnson County | 3 | 67% | 9.7 | Zone 3 | Radon test results from laboratories through 2017 |
| Lafayette County | — | — | — | Zone 3 | — |
| Lawrence County | 1 | 0% | 1.9 | Zone 3 | Radon test results from laboratories through 2017 |
| Lee County | — | — | — | Zone 3 | — |
| Lincoln County | — | — | — | Zone 3 | — |
| Little River County | 1 | 0% | 0.9 | Zone 3 | Radon test results from laboratories through 2017 |
| Logan County | 4 | 0% | 1.8 | Zone 3 | Radon test results from laboratories through 2017 |
| Lonoke County | 4 | 0% | 1.4 | Zone 3 | Radon test results from laboratories through 2017 |
| Madison County | 6 | 17% | 1.2 | Zone 3 | Radon test results from laboratories through 2017 |
| Marion County | 1 | 0% | 0.1 | Zone 2 | Radon test results from laboratories through 2017 |
| Miller County | 1 | 100% | 4.8 | Zone 3 | Radon test results from laboratories through 2017 |
| Mississippi County | 4 | 75% | 9.8 | Zone 3 | Radon test results from laboratories through 2017 |
| Monroe County | 2 | 50% | 3.9 | Zone 3 | Radon test results from laboratories through 2017 |
| Montgomery County | 1 | 0% | 0.6 | Zone 2 | Radon test results from laboratories through 2017 |
| Nevada County | — | — | — | Zone 3 | — |
| Newton County | 1 | 0% | 3.0 | Zone 3 | Radon test results from laboratories through 2017 |
| Ouachita County | 3 | 0% | 0.1 | Zone 3 | Radon test results from laboratories through 2017 |
| Perry County | — | — | — | Zone 3 | — |
| Phillips County | 1 | 0% | 0.1 | Zone 3 | Radon test results from laboratories through 2017 |
| Pike County | — | — | — | Zone 3 | — |
| Poinsett County | — | — | — | Zone 3 | — |
| Polk County | 1 | 0% | 2.2 | Zone 3 | Radon test results from laboratories through 2017 |
| Pope County | 13 | 15% | 2.7 | Zone 3 | Radon test results from laboratories through 2017 |
| Prairie County | 1 | 100% | 4.5 | Zone 3 | Radon test results from laboratories through 2017 |
| Pulaski County | 110 | 6% | 0.9 | Zone 3 | Radon test results from laboratories through 2017 |
| Randolph County | 2 | 50% | 3.2 | Zone 2 | Radon test results from laboratories through 2017 |
| Saline County | 53 | 36% | 2.4 | Zone 3 | Radon test results from laboratories through 2017 |
| Scott County | — | — | — | Zone 3 | — |
| Searcy County | 4 | 50% | 3.5 | Zone 2 | Radon test results from laboratories through 2017 |
| Sebastian County | 22 | 5% | 0.2 | Zone 3 | Radon test results from laboratories through 2017 |
| Sevier County | 2 | 0% | 1.1 | Zone 3 | Radon test results from laboratories through 2017 |
| Sharp County | 5 | 20% | 1.8 | Zone 2 | Radon test results from laboratories through 2017 |
| St. Francis County | — | — | — | Zone 3 | — |
| Stone County | 7 | 0% | 1.1 | Zone 2 | Radon test results from laboratories through 2017 |
| Union County | 2 | 0% | 0.1 | Zone 3 | Radon test results from laboratories through 2017 |
| Van Buren County | 5 | 0% | 2.5 | Zone 3 | Radon test results from laboratories through 2017 |
| Washington County | 54 | 13% | 2.2 | Zone 3 | Radon test results from laboratories through 2017 |
| White County | 5 | 0% | 0.9 | Zone 3 | Radon test results from laboratories through 2017 |
| Woodruff County | — | — | — | Zone 3 | — |
| Yell County | 2 | 0% | 0.5 | Zone 3 | Radon test results from laboratories through 2017 |
Test your home
County figures show how often tests come back high, not the level in your home. Only a test tells you that: see how to test for radon.
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