Radon levels in North Dakota

Verified county-level radon indicators are available for 53 North Dakota counties. Select a county for its source period and sample details.

High results are most common in Pembina County (82%) and least common in Williams County (34%)Share of tests at or above 4 pCi/L by county · Radon test results from laboratories, 2008–2017 · 53 of 53 counties have data
Adams County: 80% of tests at or above 4 pCi/L · 10 testsBarnes County: 67% of tests at or above 4 pCi/L · 83 testsBenson County: 77% of tests at or above 4 pCi/L · 31 testsBillings County: 85% of tests at or above 4 pCi/L · 20 testsBottineau County: 64% of tests at or above 4 pCi/L · 111 testsBowman County: 71% of tests at or above 4 pCi/L · 35 testsBurke County: 64% of tests at or above 4 pCi/L · 11 testsBurleigh County: 51% of tests at or above 4 pCi/L · 1,558 testsCass County: 58% of tests at or above 4 pCi/L · 862 testsCavalier County: 50% of tests at or above 4 pCi/L · 28 testsDickey County: 67% of tests at or above 4 pCi/L · 70 testsDivide County: 50% of tests at or above 4 pCi/L · 14 testsDunn County: 74% of tests at or above 4 pCi/L · 35 testsEddy County: 13% of tests at or above 4 pCi/L · 8 testsEmmons County: 86% of tests at or above 4 pCi/L · 29 testsFoster County: 61% of tests at or above 4 pCi/L · 31 testsGolden Valley County: 71% of tests at or above 4 pCi/L · 7 testsGrand Forks County: 76% of tests at or above 4 pCi/L · 680 testsGrant County: 74% of tests at or above 4 pCi/L · 23 testsGriggs County: 55% of tests at or above 4 pCi/L · 11 testsHettinger County: 63% of tests at or above 4 pCi/L · 16 testsKidder County: 79% of tests at or above 4 pCi/L · 29 testsLaMoure County: 70% of tests at or above 4 pCi/L · 44 testsLogan County: 50% of tests at or above 4 pCi/L · 12 testsMcHenry County: 64% of tests at or above 4 pCi/L · 28 testsMcIntosh County: 72% of tests at or above 4 pCi/L · 32 testsMcKenzie County: 56% of tests at or above 4 pCi/L · 41 testsMcLean County: 63% of tests at or above 4 pCi/L · 95 testsMercer County: 64% of tests at or above 4 pCi/L · 85 testsMorton County: 53% of tests at or above 4 pCi/L · 268 testsMountrail County: 67% of tests at or above 4 pCi/L · 48 testsNelson County: 63% of tests at or above 4 pCi/L · 19 testsOliver County: 67% of tests at or above 4 pCi/L · 12 testsPembina County: 82% of tests at or above 4 pCi/L · 57 testsPierce County: 49% of tests at or above 4 pCi/L · 39 testsRamsey County: 77% of tests at or above 4 pCi/L · 134 testsRansom County: 62% of tests at or above 4 pCi/L · 151 testsRenville County: 73% of tests at or above 4 pCi/L · 11 testsRichland County: 43% of tests at or above 4 pCi/L · 93 testsRolette County: 46% of tests at or above 4 pCi/L · 26 testsSargent County: 75% of tests at or above 4 pCi/L · 24 testsSheridan County: 55% of tests at or above 4 pCi/L · 11 testsSioux County: 100% of tests at or above 4 pCi/L · 2 testsSlope County: 70% of tests at or above 4 pCi/L · 10 testsStark County: 62% of tests at or above 4 pCi/L · 386 testsSteele County: 0% of tests at or above 4 pCi/L · 1 testsStutsman County: 74% of tests at or above 4 pCi/L · 351 testsTowner County: 56% of tests at or above 4 pCi/L · 25 testsTraill County: 51% of tests at or above 4 pCi/L · 37 testsWalsh County: 80% of tests at or above 4 pCi/L · 132 testsWard County: 43% of tests at or above 4 pCi/L · 446 testsWells County: 48% of tests at or above 4 pCi/L · 81 testsWilliams County: 34% of tests at or above 4 pCi/L · 204 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 County1080%12.7Zone 1Radon test results from laboratories through 2017
Barnes County8367%5.6Zone 1Radon test results from laboratories through 2017
Benson County3177%6.2Zone 1Radon test results from laboratories through 2017
Billings County2085%11.0Zone 1Radon test results from laboratories through 2017
Bottineau County11164%5.7Zone 1Radon test results from laboratories through 2017
Bowman County3571%5.8Zone 1Radon test results from laboratories through 2017
Burke County1164%7.8Zone 1Radon test results from laboratories through 2017
Burleigh County1,55851%4.0Zone 1Radon test results from laboratories through 2017
Cass County86258%4.7Zone 1Radon test results from laboratories through 2017
Cavalier County2850%3.9Zone 1Radon test results from laboratories through 2017
Dickey County7067%4.8Zone 1Radon test results from laboratories through 2017
Divide County1450%4.6Zone 1Radon test results from laboratories through 2017
Dunn County3574%7.1Zone 1Radon test results from laboratories through 2017
Eddy County813%0.9Zone 1Radon test results from laboratories through 2017
Emmons County2986%7.1Zone 1Radon test results from laboratories through 2017
Foster County3161%4.5Zone 1Radon test results from laboratories through 2017
Golden Valley County771%6.2Zone 1Radon test results from laboratories through 2017
Grand Forks County68076%8.8Zone 1Radon test results from laboratories through 2017
Grant County2374%7.4Zone 1Radon test results from laboratories through 2017
Griggs County1155%5.0Zone 1Radon test results from laboratories through 2017
Hettinger County1663%5.8Zone 1Radon test results from laboratories through 2017
Kidder County2979%7.3Zone 1Radon test results from laboratories through 2017
LaMoure County4470%5.2Zone 1Radon test results from laboratories through 2017
Logan County1250%3.7Zone 1Radon test results from laboratories through 2017
McHenry County2864%5.3Zone 1Radon test results from laboratories through 2017
McIntosh County3272%7.0Zone 1Radon test results from laboratories through 2017
McKenzie County4156%4.8Zone 1Radon test results from laboratories through 2017
McLean County9563%5.6Zone 1Radon test results from laboratories through 2017
Mercer County8564%5.7Zone 1Radon test results from laboratories through 2017
Morton County26853%4.2Zone 1Radon test results from laboratories through 2017
Mountrail County4867%7.3Zone 1Radon test results from laboratories through 2017
Nelson County1963%5.7Zone 1Radon test results from laboratories through 2017
Oliver County1267%6.0Zone 1Radon test results from laboratories through 2017
Pembina County5782%9.3Zone 1Radon test results from laboratories through 2017
Pierce County3949%3.8Zone 1Radon test results from laboratories through 2017
Ramsey County13477%6.9Zone 1Radon test results from laboratories through 2017
Ransom County15162%5.8Zone 1Radon test results from laboratories through 2017
Renville County1173%6.4Zone 1Radon test results from laboratories through 2017
Richland County9343%3.6Zone 1Radon test results from laboratories through 2017
Rolette County2646%3.4Zone 1Radon test results from laboratories through 2017
Sargent County2475%7.2Zone 1Radon test results from laboratories through 2017
Sheridan County1155%4.2Zone 1Radon test results from laboratories through 2017
Sioux County2100%9.3Zone 1Radon test results from laboratories through 2017
Slope County1070%10.3Zone 1Radon test results from laboratories through 2017
Stark County38662%5.1Zone 1Radon test results from laboratories through 2017
Steele County10%2.0Zone 1Radon test results from laboratories through 2017
Stutsman County35174%5.8Zone 1Radon test results from laboratories through 2017
Towner County2556%5.6Zone 1Radon test results from laboratories through 2017
Traill County3751%4.1Zone 1Radon test results from laboratories through 2017
Walsh County13280%9.8Zone 1Radon test results from laboratories through 2017
Ward County44643%3.3Zone 1Radon test results from laboratories through 2017
Wells County8148%3.8Zone 1Radon test results from laboratories through 2017
Williams County20434%2.9Zone 1Radon test results from laboratories through 2017

Test your home

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