Radon levels in Kentucky

Verified county-level radon indicators are available for 120 Kentucky counties. Select a county for its source period and sample details.

High results are most common in Meade County (68%) and least common in Hopkins County (10%)Share of tests at or above 4 pCi/L by county · Radon test results from laboratories, 2008–2017 · 120 of 120 counties have data
Adair County: 43% of tests at or above 4 pCi/L · 53 testsAllen County: 29% of tests at or above 4 pCi/L · 58 testsAnderson County: 25% of tests at or above 4 pCi/L · 226 testsBallard County: 0% of tests at or above 4 pCi/L · 4 testsBarren County: 52% of tests at or above 4 pCi/L · 186 testsBath County: 42% of tests at or above 4 pCi/L · 12 testsBell County: 13% of tests at or above 4 pCi/L · 8 testsBoone County: 43% of tests at or above 4 pCi/L · 1,434 testsBourbon County: 54% of tests at or above 4 pCi/L · 127 testsBoyd County: 18% of tests at or above 4 pCi/L · 168 testsBoyle County: 54% of tests at or above 4 pCi/L · 492 testsBracken County: 20% of tests at or above 4 pCi/L · 5 testsBreathitt County: 19% of tests at or above 4 pCi/L · 47 testsBreckinridge County: 31% of tests at or above 4 pCi/L · 32 testsBullitt County: 48% of tests at or above 4 pCi/L · 551 testsButler County: 4% of tests at or above 4 pCi/L · 26 testsCaldwell County: 40% of tests at or above 4 pCi/L · 20 testsCalloway County: 22% of tests at or above 4 pCi/L · 27 testsCampbell County: 26% of tests at or above 4 pCi/L · 543 testsCarlisle County: 0% of tests at or above 4 pCi/L · 1 testsCarroll County: 38% of tests at or above 4 pCi/L · 26 testsCarter County: 32% of tests at or above 4 pCi/L · 41 testsCasey County: 33% of tests at or above 4 pCi/L · 43 testsChristian County: 36% of tests at or above 4 pCi/L · 72 testsClark County: 29% of tests at or above 4 pCi/L · 231 testsClay County: 20% of tests at or above 4 pCi/L · 10 testsClinton County: 48% of tests at or above 4 pCi/L · 40 testsCrittenden County: 25% of tests at or above 4 pCi/L · 8 testsCumberland County: 56% of tests at or above 4 pCi/L · 18 testsDaviess County: 20% of tests at or above 4 pCi/L · 145 testsEdmonson County: 21% of tests at or above 4 pCi/L · 62 testsElliott County: 40% of tests at or above 4 pCi/L · 5 testsEstill County: 44% of tests at or above 4 pCi/L · 177 testsFayette County: 54% of tests at or above 4 pCi/L · 5,263 testsFleming County: 36% of tests at or above 4 pCi/L · 22 testsFloyd County: 40% of tests at or above 4 pCi/L · 20 testsFranklin County: 43% of tests at or above 4 pCi/L · 810 testsFulton County: 0% of tests at or above 4 pCi/L · 1 testsGallatin County: 25% of tests at or above 4 pCi/L · 24 testsGarrard County: 40% of tests at or above 4 pCi/L · 164 testsGrant County: 33% of tests at or above 4 pCi/L · 78 testsGraves County: 8% of tests at or above 4 pCi/L · 24 testsGrayson County: 28% of tests at or above 4 pCi/L · 36 testsGreen County: 32% of tests at or above 4 pCi/L · 31 testsGreenup County: 13% of tests at or above 4 pCi/L · 104 testsHancock County: 17% of tests at or above 4 pCi/L · 6 testsHardin County: 50% of tests at or above 4 pCi/L · 429 testsHarlan County: 25% of tests at or above 4 pCi/L · 4 testsHarrison County: 47% of tests at or above 4 pCi/L · 111 testsHart County: 65% of tests at or above 4 pCi/L · 84 testsHenderson County: 24% of tests at or above 4 pCi/L · 54 testsHenry County: 37% of tests at or above 4 pCi/L · 41 testsHickman County: 0% of tests at or above 4 pCi/L · 7 testsHopkins County: 10% of tests at or above 4 pCi/L · 42 testsJackson County: 0% of tests at or above 4 pCi/L · 11 testsJefferson County: 39% of tests at or above 4 pCi/L · 6,590 testsJessamine County: 56% of tests at or above 4 pCi/L · 789 testsJohnson County: 0% of tests at or above 4 pCi/L · 28 testsKenton County: 26% of tests at or above 4 pCi/L · 1,167 testsKnott County: 23% of tests at or above 4 pCi/L · 13 testsKnox County: 10% of tests at or above 4 pCi/L · 29 testsLarue County: 47% of tests at or above 4 pCi/L · 34 testsLaurel County: 22% of tests at or above 4 pCi/L · 100 testsLawrence County: 0% of tests at or above 4 pCi/L · 9 testsLee County: 6% of tests at or above 4 pCi/L · 18 testsLeslie County: 10% of tests at or above 4 pCi/L · 10 testsLetcher County: 32% of tests at or above 4 pCi/L · 22 testsLewis County: 33% of tests at or above 4 pCi/L · 12 testsLincoln County: 36% of tests at or above 4 pCi/L · 135 testsLivingston County: 0% of tests at or above 4 pCi/L · 11 testsLogan County: 32% of tests at or above 4 pCi/L · 79 testsLyon County: 36% of tests at or above 4 pCi/L · 14 testsMcCracken County: 21% of tests at or above 4 pCi/L · 28 testsMcCreary County: 0% of tests at or above 4 pCi/L · 9 testsMcLean County: 50% of tests at or above 4 pCi/L · 2 testsMadison County: 39% of tests at or above 4 pCi/L · 604 testsMagoffin County: 0% of tests at or above 4 pCi/L · 13 testsMarion County: 49% of tests at or above 4 pCi/L · 177 testsMarshall County: 11% of tests at or above 4 pCi/L · 85 testsMartin County: 0% of tests at or above 4 pCi/L · 2 testsMason County: 25% of tests at or above 4 pCi/L · 32 testsMeade County: 68% of tests at or above 4 pCi/L · 117 testsMenifee County: 22% of tests at or above 4 pCi/L · 41 testsMercer County: 38% of tests at or above 4 pCi/L · 288 testsMetcalfe County: 45% of tests at or above 4 pCi/L · 33 testsMonroe County: 53% of tests at or above 4 pCi/L · 87 testsMontgomery County: 51% of tests at or above 4 pCi/L · 105 testsMorgan County: 6% of tests at or above 4 pCi/L · 18 testsMuhlenberg County: 18% of tests at or above 4 pCi/L · 17 testsNelson County: 66% of tests at or above 4 pCi/L · 304 testsNicholas County: 10% of tests at or above 4 pCi/L · 20 testsOhio County: 12% of tests at or above 4 pCi/L · 17 testsOldham County: 37% of tests at or above 4 pCi/L · 803 testsOwen County: 36% of tests at or above 4 pCi/L · 58 testsOwsley County: 63% of tests at or above 4 pCi/L · 8 testsPendleton County: 26% of tests at or above 4 pCi/L · 34 testsPerry County: 21% of tests at or above 4 pCi/L · 24 testsPike County: 17% of tests at or above 4 pCi/L · 82 testsPowell County: 45% of tests at or above 4 pCi/L · 29 testsPulaski County: 59% of tests at or above 4 pCi/L · 395 testsRobertson County: 25% of tests at or above 4 pCi/L · 4 testsRockcastle County: 43% of tests at or above 4 pCi/L · 14 testsRowan County: 19% of tests at or above 4 pCi/L · 74 testsRussell County: 25% of tests at or above 4 pCi/L · 32 testsScott County: 47% of tests at or above 4 pCi/L · 875 testsShelby County: 38% of tests at or above 4 pCi/L · 407 testsSimpson County: 33% of tests at or above 4 pCi/L · 126 testsSpencer County: 31% of tests at or above 4 pCi/L · 166 testsTaylor County: 57% of tests at or above 4 pCi/L · 91 testsTodd County: 18% of tests at or above 4 pCi/L · 62 testsTrigg County: 22% of tests at or above 4 pCi/L · 45 testsTrimble County: 46% of tests at or above 4 pCi/L · 24 testsUnion County: 25% of tests at or above 4 pCi/L · 8 testsWarren County: 62% of tests at or above 4 pCi/L · 1,624 testsWashington County: 27% of tests at or above 4 pCi/L · 44 testsWayne County: 61% of tests at or above 4 pCi/L · 64 testsWebster County: 13% of tests at or above 4 pCi/L · 8 testsWhitley County: 4% of tests at or above 4 pCi/L · 23 testsWolfe County: 0% of tests at or above 4 pCi/L · 4 testsWoodford County: 58% of tests at or above 4 pCi/L · 342 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
Adair County5343%3.8Zone 1Radon test results from laboratories through 2017
Allen County5829%1.9Zone 1Radon test results from laboratories through 2017
Anderson County22625%2.2Zone 2Radon test results from laboratories through 2017
Ballard County40%1.4Zone 3Radon test results from laboratories through 2017
Barren County18652%4.0Zone 1Radon test results from laboratories through 2017
Bath County1242%3.1Zone 2Radon test results from laboratories through 2017
Bell County813%1.3Zone 2Radon test results from laboratories through 2017
Boone County1,43443%3.5Zone 2Radon test results from laboratories through 2017
Bourbon County12754%4.8Zone 1Radon test results from laboratories through 2017
Boyd County16818%2.1Zone 2Radon test results from laboratories through 2017
Boyle County49254%4.4Zone 1Radon test results from laboratories through 2017
Bracken County520%2.0Zone 2Radon test results from laboratories through 2017
Breathitt County4719%1.7Zone 2Radon test results from laboratories through 2017
Breckinridge County3231%2.5Zone 2Radon test results from laboratories through 2017
Bullitt County55148%3.6Zone 1Radon test results from laboratories through 2017
Butler County264%1.5Zone 2Radon test results from laboratories through 2017
Caldwell County2040%3.7Zone 2Radon test results from laboratories through 2017
Calloway County2722%2.4Zone 3Radon test results from laboratories through 2017
Campbell County54326%2.3Zone 2Radon test results from laboratories through 2017
Carlisle County10%2.0Zone 3Radon test results from laboratories through 2017
Carroll County2638%3.5Zone 2Radon test results from laboratories through 2017
Carter County4132%2.2Zone 2Radon test results from laboratories through 2017
Casey County4333%3.1Zone 1Radon test results from laboratories through 2017
Christian County7236%3.2Zone 2Radon test results from laboratories through 2017
Clark County23129%2.4Zone 1Radon test results from laboratories through 2017
Clay County1020%2.1Zone 2Radon test results from laboratories through 2017
Clinton County4048%3.5Zone 2Radon test results from laboratories through 2017
Crittenden County825%1.6Zone 2Radon test results from laboratories through 2017
Cumberland County1856%4.6Zone 1Radon test results from laboratories through 2017
Daviess County14520%1.8Zone 2Radon test results from laboratories through 2017
Edmonson County6221%1.6Zone 2Radon test results from laboratories through 2017
Elliott County540%3.5Zone 2Radon test results from laboratories through 2017
Estill County17744%3.2Zone 2Radon test results from laboratories through 2017
Fayette County5,26354%4.5Zone 1Radon test results from laboratories through 2017
Fleming County2236%2.9Zone 2Radon test results from laboratories through 2017
Floyd County2040%2.7Zone 2Radon test results from laboratories through 2017
Franklin County81043%3.3Zone 1Radon test results from laboratories through 2017
Fulton County10%1.9Zone 3Radon test results from laboratories through 2017
Gallatin County2425%2.5Zone 2Radon test results from laboratories through 2017
Garrard County16440%2.6Zone 2Radon test results from laboratories through 2017
Grant County7833%2.5Zone 2Radon test results from laboratories through 2017
Graves County248%1.5Zone 3Radon test results from laboratories through 2017
Grayson County3628%2.2Zone 2Radon test results from laboratories through 2017
Green County3132%2.5Zone 1Radon test results from laboratories through 2017
Greenup County10413%2.0Zone 2Radon test results from laboratories through 2017
Hancock County617%1.4Zone 2Radon test results from laboratories through 2017
Hardin County42950%4.0Zone 2Radon test results from laboratories through 2017
Harlan County425%0.1Zone 2Radon test results from laboratories through 2017
Harrison County11147%3.4Zone 1Radon test results from laboratories through 2017
Hart County8465%8.0Zone 1Radon test results from laboratories through 2017
Henderson County5424%2.3Zone 2Radon test results from laboratories through 2017
Henry County4137%3.2Zone 2Radon test results from laboratories through 2017
Hickman County70%0.1Zone 3Radon test results from laboratories through 2017
Hopkins County4210%1.7Zone 2Radon test results from laboratories through 2017
Jackson County110%1.8Zone 2Radon test results from laboratories through 2017
Jefferson County6,59039%2.7Zone 1Radon test results from laboratories through 2017
Jessamine County78956%4.7Zone 1Radon test results from laboratories through 2017
Johnson County280%0.8Zone 2Radon test results from laboratories through 2017
Kenton County1,16726%2.3Zone 2Radon test results from laboratories through 2017
Knott County1323%1.7Zone 2Radon test results from laboratories through 2017
Knox County2910%2.1Zone 2Radon test results from laboratories through 2017
Larue County3447%3.7Zone 2Radon test results from laboratories through 2017
Laurel County10022%1.9Zone 2Radon test results from laboratories through 2017
Lawrence County90%1.7Zone 2Radon test results from laboratories through 2017
Lee County186%1.2Zone 2Radon test results from laboratories through 2017
Leslie County1010%0.1Zone 2Radon test results from laboratories through 2017
Letcher County2232%1.8Zone 2Radon test results from laboratories through 2017
Lewis County1233%2.8Zone 2Radon test results from laboratories through 2017
Lincoln County13536%2.8Zone 1Radon test results from laboratories through 2017
Livingston County110%1.3Zone 2Radon test results from laboratories through 2017
Logan County7932%2.4Zone 2Radon test results from laboratories through 2017
Lyon County1436%2.5Zone 2Radon test results from laboratories through 2017
Madison County60439%2.9Zone 2Radon test results from laboratories through 2017
Magoffin County130%0.5Zone 2Radon test results from laboratories through 2017
Marion County17749%3.9Zone 1Radon test results from laboratories through 2017
Marshall County8511%1.5Zone 3Radon test results from laboratories through 2017
Martin County20%0.1Zone 2Radon test results from laboratories through 2017
Mason County3225%2.6Zone 2Radon test results from laboratories through 2017
McCracken County2821%1.6Zone 3Radon test results from laboratories through 2017
McCreary County90%1.2Zone 2Radon test results from laboratories through 2017
McLean County250%6.7Zone 2Radon test results from laboratories through 2017
Meade County11768%8.2Zone 2Radon test results from laboratories through 2017
Menifee County4122%1.4Zone 2Radon test results from laboratories through 2017
Mercer County28838%2.7Zone 1Radon test results from laboratories through 2017
Metcalfe County3345%3.5Zone 1Radon test results from laboratories through 2017
Monroe County8753%4.6Zone 1Radon test results from laboratories through 2017
Montgomery County10551%4.1Zone 2Radon test results from laboratories through 2017
Morgan County186%1.2Zone 2Radon test results from laboratories through 2017
Muhlenberg County1718%2.3Zone 2Radon test results from laboratories through 2017
Nelson County30466%6.3Zone 1Radon test results from laboratories through 2017
Nicholas County2010%1.9Zone 2Radon test results from laboratories through 2017
Ohio County1712%1.9Zone 2Radon test results from laboratories through 2017
Oldham County80337%2.7Zone 2Radon test results from laboratories through 2017
Owen County5836%2.5Zone 2Radon test results from laboratories through 2017
Owsley County863%18.3Zone 2Radon test results from laboratories through 2017
Pendleton County3426%1.9Zone 1Radon test results from laboratories through 2017
Perry County2421%1.4Zone 2Radon test results from laboratories through 2017
Pike County8217%1.1Zone 2Radon test results from laboratories through 2017
Powell County2945%3.2Zone 2Radon test results from laboratories through 2017
Pulaski County39559%5.1Zone 1Radon test results from laboratories through 2017
Robertson County425%1.1Zone 1Radon test results from laboratories through 2017
Rockcastle County1443%3.0Zone 2Radon test results from laboratories through 2017
Rowan County7419%1.6Zone 2Radon test results from laboratories through 2017
Russell County3225%2.9Zone 1Radon test results from laboratories through 2017
Scott County87547%3.6Zone 1Radon test results from laboratories through 2017
Shelby County40738%3.0Zone 2Radon test results from laboratories through 2017
Simpson County12633%2.6Zone 2Radon test results from laboratories through 2017
Spencer County16631%2.5Zone 2Radon test results from laboratories through 2017
Taylor County9157%4.4Zone 1Radon test results from laboratories through 2017
Todd County6218%1.8Zone 2Radon test results from laboratories through 2017
Trigg County4522%2.4Zone 2Radon test results from laboratories through 2017
Trimble County2446%3.7Zone 2Radon test results from laboratories through 2017
Union County825%1.6Zone 2Radon test results from laboratories through 2017
Warren County1,62462%6.3Zone 1Radon test results from laboratories through 2017
Washington County4427%2.4Zone 2Radon test results from laboratories through 2017
Wayne County6461%5.0Zone 2Radon test results from laboratories through 2017
Webster County813%2.0Zone 2Radon test results from laboratories through 2017
Whitley County234%1.6Zone 2Radon test results from laboratories through 2017
Wolfe County40%0.1Zone 2Radon test results from laboratories through 2017
Woodford County34258%4.9Zone 1Radon test results from laboratories through 2017

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