Radon Levels in North Dakota
53 counties — 53 high risk, 0 moderate, 0 low risk
North Dakota Radon Zone Map
Counties colored by EPA radon zone. Red = Zone 1, Orange = Zone 2, Green = Zone 3.
Highest-Risk Counties
AdamsZone 1 — High
BarnesZone 1 — High
BensonZone 1 — High
BillingsZone 1 — High
BottineauZone 1 — High
BowmanZone 1 — High
BurkeZone 1 — High
Burleigh30.8% above action level
Cass52.6% above action level
CavalierZone 1 — High
DickeyZone 1 — High
DivideZone 1 — High
+41 more
Check Your North Dakota ZIP Code
All 53 Counties — By Radon Risk
Sources: EPA Map of Radon Zones, CDC Environmental Health Tracking Network
Frequently Asked Questions
How many counties in North Dakota have high radon risk?
North Dakota has 53 counties classified as EPA Zone 1 (high radon risk), 0 as Zone 2 (moderate), and 0 as Zone 3 (low risk).
Is radon a problem in North Dakota?
North Dakota has 53 high-risk counties where elevated radon is likely. The EPA recommends all homes in North Dakota be tested for radon, regardless of which zone they're in.
How do I check radon levels for my North Dakota address?
Enter your ZIP code in the search box above to see your county's EPA radon zone and available testing data. For your specific home's radon level, you'll need a radon test kit.