High results are most common in Clay County (85%) and least common in Cherry County (13%)Share of tests at or above 4 pCi/L by county · Radon test results from laboratories, 2008–2017 · 93 of 93 counties have data
Adams County: 69% of tests at or above 4 pCi/L · 1,308 testsAntelope County: 71% of tests at or above 4 pCi/L · 258 testsArthur County: 0% of tests at or above 4 pCi/L · 9 testsBanner County: 0% of tests at or above 4 pCi/L · 4 testsBlaine County: 0% of tests at or above 4 pCi/L · 3 testsBoone County: 74% of tests at or above 4 pCi/L · 225 testsBox Butte County: 36% of tests at or above 4 pCi/L · 287 testsBoyd County: 60% of tests at or above 4 pCi/L · 47 testsBrown County: 42% of tests at or above 4 pCi/L · 62 testsBuffalo County: 57% of tests at or above 4 pCi/L · 968 testsBurt County: 80% of tests at or above 4 pCi/L · 405 testsButler County: 79% of tests at or above 4 pCi/L · 483 testsCass County: 66% of tests at or above 4 pCi/L · 620 testsCedar County: 77% of tests at or above 4 pCi/L · 487 testsChase County: 68% of tests at or above 4 pCi/L · 44 testsCherry County: 13% of tests at or above 4 pCi/L · 30 testsCheyenne County: 53% of tests at or above 4 pCi/L · 292 testsClay County: 85% of tests at or above 4 pCi/L · 194 testsColfax County: 57% of tests at or above 4 pCi/L · 203 testsCuming County: 59% of tests at or above 4 pCi/L · 465 testsCuster County: 52% of tests at or above 4 pCi/L · 132 testsDakota County: 61% of tests at or above 4 pCi/L · 322 testsDawes County: 59% of tests at or above 4 pCi/L · 516 testsDawson County: 43% of tests at or above 4 pCi/L · 239 testsDeuel County: 43% of tests at or above 4 pCi/L · 49 testsDixon County: 78% of tests at or above 4 pCi/L · 275 testsDodge County: 66% of tests at or above 4 pCi/L · 815 testsDouglas County: 51% of tests at or above 4 pCi/L · 8,556 testsDundy County: 57% of tests at or above 4 pCi/L · 21 testsFillmore County: 77% of tests at or above 4 pCi/L · 175 testsFranklin County: 72% of tests at or above 4 pCi/L · 97 testsFrontier County: 53% of tests at or above 4 pCi/L · 43 testsFurnas County: 67% of tests at or above 4 pCi/L · 84 testsGage County: 70% of tests at or above 4 pCi/L · 567 testsGarden County: 38% of tests at or above 4 pCi/L · 56 testsGarfield County: 28% of tests at or above 4 pCi/L · 29 testsGosper County: 69% of tests at or above 4 pCi/L · 42 testsGrant County: 0% of tests at or above 4 pCi/L · 4 testsGreeley County: 58% of tests at or above 4 pCi/L · 38 testsHall County: 37% of tests at or above 4 pCi/L · 1,245 testsHamilton County: 75% of tests at or above 4 pCi/L · 366 testsHarlan County: 66% of tests at or above 4 pCi/L · 76 testsHayes County: 63% of tests at or above 4 pCi/L · 8 testsHitchcock County: 52% of tests at or above 4 pCi/L · 31 testsHolt County: 43% of tests at or above 4 pCi/L · 349 testsHooker County: 0% of tests at or above 4 pCi/L · 3 testsHoward County: 32% of tests at or above 4 pCi/L · 114 testsJefferson County: 67% of tests at or above 4 pCi/L · 325 testsJohnson County: 62% of tests at or above 4 pCi/L · 74 testsKearney County: 59% of tests at or above 4 pCi/L · 138 testsKeith County: 55% of tests at or above 4 pCi/L · 120 testsKeya Paha County: 29% of tests at or above 4 pCi/L · 14 testsKimball County: 44% of tests at or above 4 pCi/L · 81 testsKnox County: 69% of tests at or above 4 pCi/L · 401 testsLancaster County: 58% of tests at or above 4 pCi/L · 4,954 testsLincoln County: 27% of tests at or above 4 pCi/L · 895 testsLogan County: 13% of tests at or above 4 pCi/L · 8 testsLoup County: 7% of tests at or above 4 pCi/L · 15 testsMcPherson County: 0% of tests at or above 4 pCi/L · 10 testsMadison County: 66% of tests at or above 4 pCi/L · 1,257 testsMerrick County: 26% of tests at or above 4 pCi/L · 171 testsMorrill County: 43% of tests at or above 4 pCi/L · 56 testsNance County: 61% of tests at or above 4 pCi/L · 171 testsNemaha County: 75% of tests at or above 4 pCi/L · 315 testsNuckolls County: 79% of tests at or above 4 pCi/L · 244 testsOtoe County: 70% of tests at or above 4 pCi/L · 402 testsPawnee County: 59% of tests at or above 4 pCi/L · 116 testsPerkins County: 50% of tests at or above 4 pCi/L · 40 testsPhelps County: 60% of tests at or above 4 pCi/L · 328 testsPierce County: 55% of tests at or above 4 pCi/L · 234 testsPlatte County: 51% of tests at or above 4 pCi/L · 981 testsPolk County: 77% of tests at or above 4 pCi/L · 188 testsRed Willow County: 61% of tests at or above 4 pCi/L · 310 testsRichardson County: 76% of tests at or above 4 pCi/L · 472 testsRock County: 4% of tests at or above 4 pCi/L · 24 testsSaline County: 69% of tests at or above 4 pCi/L · 242 testsSarpy County: 54% of tests at or above 4 pCi/L · 4,799 testsSaunders County: 73% of tests at or above 4 pCi/L · 589 testsScotts Bluff County: 57% of tests at or above 4 pCi/L · 540 testsSeward County: 75% of tests at or above 4 pCi/L · 914 testsSheridan County: 35% of tests at or above 4 pCi/L · 107 testsSherman County: 48% of tests at or above 4 pCi/L · 91 testsSioux County: 32% of tests at or above 4 pCi/L · 19 testsStanton County: 64% of tests at or above 4 pCi/L · 219 testsThayer County: 68% of tests at or above 4 pCi/L · 110 testsThomas County: 11% of tests at or above 4 pCi/L · 9 testsThurston County: 77% of tests at or above 4 pCi/L · 114 testsValley County: 52% of tests at or above 4 pCi/L · 84 testsWashington County: 69% of tests at or above 4 pCi/L · 557 testsWayne County: 76% of tests at or above 4 pCi/L · 637 testsWebster County: 83% of tests at or above 4 pCi/L · 137 testsWheeler County: 25% of tests at or above 4 pCi/L · 8 testsYork County: 80% of tests at or above 4 pCi/L · 616 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
Adams County1,30869%5.7Zone 1Radon test results from laboratories through 2017
Antelope County25871%6.5Zone 2Radon test results from laboratories through 2017
Arthur County90%1.5Zone 3Radon test results from laboratories through 2017
Banner County40%2.8Zone 2Radon test results from laboratories through 2017
Blaine County30%0.7Zone 3Radon test results from laboratories through 2017
Boone County22574%6.3Zone 1Radon test results from laboratories through 2017
Box Butte County28736%3.2Zone 2Radon test results from laboratories through 2017
Boyd County4760%4.6Zone 1Radon test results from laboratories through 2017
Brown County6242%3.7Zone 3Radon test results from laboratories through 2017
Buffalo County96857%4.4Zone 2Radon test results from laboratories through 2017
Burt County40580%8.6Zone 1Radon test results from laboratories through 2017
Butler County48379%7.9Zone 1Radon test results from laboratories through 2017
Cass County62066%6.3Zone 1Radon test results from laboratories through 2017
Cedar County48777%8.3Zone 1Radon test results from laboratories through 2017
Chase County4468%6.5Zone 2Radon test results from laboratories through 2017
Cherry County3013%1.7Zone 3Radon test results from laboratories through 2017
Cheyenne County29253%4.1Zone 2Radon test results from laboratories through 2017
Clay County19485%8.6Zone 1Radon test results from laboratories through 2017
Colfax County20357%4.9Zone 1Radon test results from laboratories through 2017
Cuming County46559%5.1Zone 1Radon test results from laboratories through 2017
Custer County13252%4.2Zone 2Radon test results from laboratories through 2017
Dakota County32261%5.0Zone 1Radon test results from laboratories through 2017
Dawes County51659%5.0Zone 2Radon test results from laboratories through 2017
Dawson County23943%3.2Zone 2Radon test results from laboratories through 2017
Deuel County4943%3.5Zone 2Radon test results from laboratories through 2017
Dixon County27578%7.6Zone 1Radon test results from laboratories through 2017
Dodge County81566%5.6Zone 1Radon test results from laboratories through 2017
Douglas County8,55651%4.0Zone 1Radon test results from laboratories through 2017
Dundy County2157%4.1Zone 2Radon test results from laboratories through 2017
Fillmore County17577%6.8Zone 1Radon test results from laboratories through 2017
Franklin County9772%6.1Zone 1Radon test results from laboratories through 2017
Frontier County4353%4.3Zone 1Radon test results from laboratories through 2017
Furnas County8467%5.5Zone 1Radon test results from laboratories through 2017
Gage County56770%6.8Zone 1Radon test results from laboratories through 2017
Garden County5638%3.5Zone 3Radon test results from laboratories through 2017
Garfield County2928%2.3Zone 3Radon test results from laboratories through 2017
Gosper County4269%5.6Zone 1Radon test results from laboratories through 2017
Grant County40%0.5Zone 3Radon test results from laboratories through 2017
Greeley County3858%4.7Zone 1Radon test results from laboratories through 2017
Hall County1,24537%3.2Zone 2Radon test results from laboratories through 2017
Hamilton County36675%6.7Zone 1Radon test results from laboratories through 2017
Harlan County7666%5.9Zone 1Radon test results from laboratories through 2017
Hayes County863%4.6Zone 1Radon test results from laboratories through 2017
Hitchcock County3152%4.2Zone 1Radon test results from laboratories through 2017
Holt County34943%3.3Zone 3Radon test results from laboratories through 2017
Hooker County30%0.8Zone 3Radon test results from laboratories through 2017
Howard County11432%2.5Zone 2Radon test results from laboratories through 2017
Jefferson County32567%6.6Zone 1Radon test results from laboratories through 2017
Johnson County7462%5.6Zone 1Radon test results from laboratories through 2017
Kearney County13859%4.7Zone 1Radon test results from laboratories through 2017
Keith County12055%4.3Zone 2Radon test results from laboratories through 2017
Keya Paha County1429%2.8Zone 2Radon test results from laboratories through 2017
Kimball County8144%3.6Zone 2Radon test results from laboratories through 2017
Knox County40169%6.2Zone 1Radon test results from laboratories through 2017
Lancaster County4,95458%4.8Zone 1Radon test results from laboratories through 2017
Lincoln County89527%2.6Zone 3Radon test results from laboratories through 2017
Logan County813%2.3Zone 3Radon test results from laboratories through 2017
Loup County157%1.1Zone 3Radon test results from laboratories through 2017
Madison County1,25766%6.1Zone 1Radon test results from laboratories through 2017
McPherson County100%1.0Zone 3Radon test results from laboratories through 2017
Merrick County17126%2.3Zone 2Radon test results from laboratories through 2017
Morrill County5643%3.3Zone 2Radon test results from laboratories through 2017
Nance County17161%5.3Zone 1Radon test results from laboratories through 2017
Nemaha County31575%8.7Zone 1Radon test results from laboratories through 2017
Nuckolls County24479%8.4Zone 1Radon test results from laboratories through 2017
Otoe County40270%6.5Zone 1Radon test results from laboratories through 2017
Pawnee County11659%4.7Zone 1Radon test results from laboratories through 2017
Perkins County4050%4.0Zone 2Radon test results from laboratories through 2017
Phelps County32860%4.9Zone 1Radon test results from laboratories through 2017
Pierce County23455%4.5Zone 1Radon test results from laboratories through 2017
Platte County98151%4.1Zone 1Radon test results from laboratories through 2017
Polk County18877%6.8Zone 1Radon test results from laboratories through 2017
Red Willow County31061%4.6Zone 1Radon test results from laboratories through 2017
Richardson County47276%7.4Zone 1Radon test results from laboratories through 2017
Rock County244%1.2Zone 3Radon test results from laboratories through 2017
Saline County24269%6.2Zone 1Radon test results from laboratories through 2017
Sarpy County4,79954%4.3Zone 1Radon test results from laboratories through 2017
Saunders County58973%6.8Zone 1Radon test results from laboratories through 2017
Scotts Bluff County54057%4.3Zone 2Radon test results from laboratories through 2017
Seward County91475%7.6Zone 1Radon test results from laboratories through 2017
Sheridan County10735%2.9Zone 2Radon test results from laboratories through 2017
Sherman County9148%3.9Zone 2Radon test results from laboratories through 2017
Sioux County1932%1.9Zone 2Radon test results from laboratories through 2017
Stanton County21964%5.8Zone 1Radon test results from laboratories through 2017
Thayer County11068%5.6Zone 1Radon test results from laboratories through 2017
Thomas County911%0.7Zone 3Radon test results from laboratories through 2017
Thurston County11477%7.0Zone 1Radon test results from laboratories through 2017
Valley County8452%4.2Zone 2Radon test results from laboratories through 2017
Washington County55769%5.9Zone 1Radon test results from laboratories through 2017
Wayne County63776%8.1Zone 1Radon test results from laboratories through 2017
Webster County13783%7.7Zone 1Radon test results from laboratories through 2017
Wheeler County825%0.9Zone 3Radon test results from laboratories through 2017
York County61680%7.7Zone 1Radon test results from laboratories through 2017

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