High results are most common in Garland County (45%) and least common in Pulaski County (6%)Share of tests at or above 4 pCi/L by county · Radon test results from laboratories, 2008–2017 · 58 of 75 counties have data
Cross County: no dataIzard County: 0% of tests at or above 4 pCi/L · 4 testsCleveland County: 0% of tests at or above 4 pCi/L · 3 testsPope County: 15% of tests at or above 4 pCi/L · 13 testsVan Buren County: 0% of tests at or above 4 pCi/L · 5 testsDrew County: no dataSaline County: 36% of tests at or above 4 pCi/L · 53 testsLittle River County: 0% of tests at or above 4 pCi/L · 1 testsWashington County: 13% of tests at or above 4 pCi/L · 54 testsPulaski County: 6% of tests at or above 4 pCi/L · 110 testsLonoke County: 0% of tests at or above 4 pCi/L · 4 testsConway County: 33% of tests at or above 4 pCi/L · 3 testsMontgomery County: 0% of tests at or above 4 pCi/L · 1 testsCleburne County: 11% of tests at or above 4 pCi/L · 9 testsSearcy County: 50% of tests at or above 4 pCi/L · 4 testsMonroe County: 50% of tests at or above 4 pCi/L · 2 testsPoinsett County: no dataBenton County: 34% of tests at or above 4 pCi/L · 147 testsMississippi County: 75% of tests at or above 4 pCi/L · 4 testsFulton County: 50% of tests at or above 4 pCi/L · 2 testsScott County: no dataHoward County: 0% of tests at or above 4 pCi/L · 3 testsWoodruff County: no dataLogan County: 0% of tests at or above 4 pCi/L · 4 testsNevada County: no dataPike County: no dataBradley County: 0% of tests at or above 4 pCi/L · 1 testsIndependence County: 27% of tests at or above 4 pCi/L · 15 testsJackson County: 0% of tests at or above 4 pCi/L · 3 testsJefferson County: 0% of tests at or above 4 pCi/L · 2 testsLawrence County: 0% of tests at or above 4 pCi/L · 1 testsPrairie County: 100% of tests at or above 4 pCi/L · 1 testsPerry County: no dataPolk County: 0% of tests at or above 4 pCi/L · 1 testsCarroll County: 29% of tests at or above 4 pCi/L · 17 testsPhillips County: 0% of tests at or above 4 pCi/L · 1 testsAshley County: no dataChicot County: no dataBoone County: 32% of tests at or above 4 pCi/L · 22 testsCrawford County: 11% of tests at or above 4 pCi/L · 9 testsMadison County: 17% of tests at or above 4 pCi/L · 6 testsFranklin County: 0% of tests at or above 4 pCi/L · 1 testsHot Spring County: 0% of tests at or above 4 pCi/L · 1 testsSharp County: 20% of tests at or above 4 pCi/L · 5 testsLafayette County: no dataBaxter County: 65% of tests at or above 4 pCi/L · 20 testsCalhoun County: no dataRandolph County: 50% of tests at or above 4 pCi/L · 2 testsWhite County: 0% of tests at or above 4 pCi/L · 5 testsClay County: 0% of tests at or above 4 pCi/L · 1 testsLee County: no dataSt. Francis County: no dataColumbia County: 0% of tests at or above 4 pCi/L · 2 testsOuachita County: 0% of tests at or above 4 pCi/L · 3 testsCraighead County: 25% of tests at or above 4 pCi/L · 8 testsDallas County: 0% of tests at or above 4 pCi/L · 1 testsFaulkner County: 5% of tests at or above 4 pCi/L · 19 testsSebastian County: 5% of tests at or above 4 pCi/L · 22 testsHempstead County: no dataYell County: 0% of tests at or above 4 pCi/L · 2 testsClark County: 0% of tests at or above 4 pCi/L · 4 testsGarland County: 45% of tests at or above 4 pCi/L · 44 testsSevier County: 0% of tests at or above 4 pCi/L · 2 testsStone County: 0% of tests at or above 4 pCi/L · 7 testsJohnson County: 67% of tests at or above 4 pCi/L · 3 testsGreene County: 0% of tests at or above 4 pCi/L · 3 testsCrittenden County: 0% of tests at or above 4 pCi/L · 1 testsLincoln County: no dataMarion County: 0% of tests at or above 4 pCi/L · 1 testsGrant County: 0% of tests at or above 4 pCi/L · 1 testsArkansas County: 0% of tests at or above 4 pCi/L · 1 testsDesha County: no dataUnion County: 0% of tests at or above 4 pCi/L · 2 testsMiller County: 100% of tests at or above 4 pCi/L · 1 testsNewton County: 0% of tests at or above 4 pCi/L · 1 tests
  • Under 10%
  • 10–20%
  • 20–30%
  • 30–40%
  • 40% or more
  • No data

Counties

CountyTests% ≥ 4 pCi/LMedian (pCi/L)EPA zone (1993)Source
Arkansas County10%1.3Zone 3Radon test results from laboratories through 2017
Ashley County———Zone 3—
Baxter County2065%5.3Zone 2Radon test results from laboratories through 2017
Benton County14734%2.2Zone 2Radon test results from laboratories through 2017
Boone County2232%2.8Zone 2Radon test results from laboratories through 2017
Bradley County10%0.1Zone 3Radon test results from laboratories through 2017
Calhoun County———Zone 3—
Carroll County1729%2.0Zone 2Radon test results from laboratories through 2017
Chicot County———Zone 3—
Clark County40%1.3Zone 3Radon test results from laboratories through 2017
Clay County10%0.2Zone 3Radon test results from laboratories through 2017
Cleburne County911%2.1Zone 3Radon test results from laboratories through 2017
Cleveland County30%0.1Zone 3Radon test results from laboratories through 2017
Columbia County20%0.6Zone 3Radon test results from laboratories through 2017
Conway County333%2.1Zone 3Radon test results from laboratories through 2017
Craighead County825%1.1Zone 3Radon test results from laboratories through 2017
Crawford County911%0.7Zone 3Radon test results from laboratories through 2017
Crittenden County10%0.1Zone 3Radon test results from laboratories through 2017
Cross County———Zone 3—
Dallas County10%1.2Zone 3Radon test results from laboratories through 2017
Desha County———Zone 3—
Drew County———Zone 3—
Faulkner County195%1.3Zone 3Radon test results from laboratories through 2017
Franklin County10%0.1Zone 3Radon test results from laboratories through 2017
Fulton County250%5.9Zone 2Radon test results from laboratories through 2017
Garland County4445%2.7Zone 2Radon test results from laboratories through 2017
Grant County10%0.9Zone 3Radon test results from laboratories through 2017
Greene County30%1.4Zone 3Radon test results from laboratories through 2017
Hempstead County———Zone 3—
Hot Spring County10%2.1Zone 3Radon test results from laboratories through 2017
Howard County30%2.6Zone 3Radon test results from laboratories through 2017
Independence County1527%2.4Zone 2Radon test results from laboratories through 2017
Izard County40%1.2Zone 2Radon test results from laboratories through 2017
Jackson County30%0.1Zone 3Radon test results from laboratories through 2017
Jefferson County20%0.5Zone 3Radon test results from laboratories through 2017
Johnson County367%9.7Zone 3Radon test results from laboratories through 2017
Lafayette County———Zone 3—
Lawrence County10%1.9Zone 3Radon test results from laboratories through 2017
Lee County———Zone 3—
Lincoln County———Zone 3—
Little River County10%0.9Zone 3Radon test results from laboratories through 2017
Logan County40%1.8Zone 3Radon test results from laboratories through 2017
Lonoke County40%1.4Zone 3Radon test results from laboratories through 2017
Madison County617%1.2Zone 3Radon test results from laboratories through 2017
Marion County10%0.1Zone 2Radon test results from laboratories through 2017
Miller County1100%4.8Zone 3Radon test results from laboratories through 2017
Mississippi County475%9.8Zone 3Radon test results from laboratories through 2017
Monroe County250%3.9Zone 3Radon test results from laboratories through 2017
Montgomery County10%0.6Zone 2Radon test results from laboratories through 2017
Nevada County———Zone 3—
Newton County10%3.0Zone 3Radon test results from laboratories through 2017
Ouachita County30%0.1Zone 3Radon test results from laboratories through 2017
Perry County———Zone 3—
Phillips County10%0.1Zone 3Radon test results from laboratories through 2017
Pike County———Zone 3—
Poinsett County———Zone 3—
Polk County10%2.2Zone 3Radon test results from laboratories through 2017
Pope County1315%2.7Zone 3Radon test results from laboratories through 2017
Prairie County1100%4.5Zone 3Radon test results from laboratories through 2017
Pulaski County1106%0.9Zone 3Radon test results from laboratories through 2017
Randolph County250%3.2Zone 2Radon test results from laboratories through 2017
Saline County5336%2.4Zone 3Radon test results from laboratories through 2017
Scott County———Zone 3—
Searcy County450%3.5Zone 2Radon test results from laboratories through 2017
Sebastian County225%0.2Zone 3Radon test results from laboratories through 2017
Sevier County20%1.1Zone 3Radon test results from laboratories through 2017
Sharp County520%1.8Zone 2Radon test results from laboratories through 2017
St. Francis County———Zone 3—
Stone County70%1.1Zone 2Radon test results from laboratories through 2017
Union County20%0.1Zone 3Radon test results from laboratories through 2017
Van Buren County50%2.5Zone 3Radon test results from laboratories through 2017
Washington County5413%2.2Zone 3Radon test results from laboratories through 2017
White County50%0.9Zone 3Radon test results from laboratories through 2017
Woodruff County———Zone 3—
Yell County20%0.5Zone 3Radon test results from laboratories through 2017

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