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Map of Radon Zones in Idaho based on Environmental Protection Agency (EPA) data

Back to Radon Zones in the United States




Radon zones
 Zone 3 (5 counties)
 Zone 2 (20 counties)
 Zone 1 (19 counties)
  Highest Potential: counties have a predicted average indoor radon screening level greater than 4 pCi/L (pico curies per liter) (red zones)
  Moderate Potential: counties have a predicted average indoor radon screening level between 2 and 4 pCi/L (orange zones)
  Low Potential: counties have a predicted average indoor radon screening level less than 2 pCi/L (yellow zones)
Ada County
Radon zone : 2

Adams County
Radon zone : 3

Bannock County
Radon zone : 2

Bear Lake County
Radon zone : 2

Benewah County
Radon zone : 1

Bingham County
Radon zone : 2

Blaine County
Radon zone : 1

Boise County
Radon zone : 1

Bonner County
Radon zone : 1

Bonneville County
Radon zone : 2

Boundary County
Radon zone : 1

Butte County
Radon zone : 1

Camas County
Radon zone : 1

Canyon County
Radon zone : 2

Caribou County
Radon zone : 2

Cassia County
Radon zone : 2

Clark County
Radon zone : 1

Clearwater County
Radon zone : 1

Custer County
Radon zone : 1

Elmore County
Radon zone : 1

Franklin County
Radon zone : 2

Fremont County
Radon zone : 1

Gem County
Radon zone : 3

Gooding County
Radon zone : 1

Idaho County
Radon zone : 1

Jefferson County
Radon zone : 2

Jerome County
Radon zone : 2

Kootenai County
Radon zone : 1

Latah County
Radon zone : 1

Lemhi County
Radon zone : 1

Lewis County
Radon zone : 3

Lincoln County
Radon zone : 2

Madison County
Radon zone : 2

Minidoka County
Radon zone : 2

Nez Perce County
Radon zone : 3

Oneida County
Radon zone : 2

Owyhee County
Radon zone : 2

Payette County
Radon zone : 2

Power County
Radon zone : 2

Shoshone County
Radon zone : 1

Teton County
Radon zone : 2

Twin Falls County
Radon zone : 2

Valley County
Radon zone : 1

Washington County
Radon zone : 3


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