Radon zone of Grand Forks County, North Dakota
Grand Forks County, North Dakota is in EPA Radon Zone 1: highest potential. That is an area estimate, not a reading for your home. EPA says high levels have been found in all three zones and all homes should be tested.
- EPA radon zone
- Zone 1 (red on the map)
- What EPA says the zone means
- Highest potential; average indoor radon levels may be greater than 4 pCi/L (picocuries per liter)
- State
- North Dakota
- EPA region
- Region 8
- Listed in the EPA table as
- Grand Forks, ND
- Source
- EPA Map of Radon Zones, text version (xls), retrieved 2026-11-05
What to do with this
EPA says the map should not be used to decide whether a home needs a test: test your home no matter where you live. EPA says to fix your home if the level is 4 pCi/L or higher, and to consider fixing it between 2 and 4 pCi/L. Read EPA's page.
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