Radon Zone Map

All counties

Radon zones in Idaho

Ada CountyIdaho2
Adams CountyIdaho3
Bannock CountyIdaho2
Bear Lake CountyIdaho2
Bingham CountyIdaho2
Blaine CountyIdaho1
Boise CountyIdaho1
Bonner CountyIdaho1
Bonneville CountyIdaho2
Boundary CountyIdaho1
Butte CountyIdaho1
Camas CountyIdaho1
Caribou CountyIdaho2
Cassia CountyIdaho2
Clark CountyIdaho1
Clearwater CountyIdaho1
Custer CountyIdaho1
Elmore CountyIdaho1
Fremont CountyIdaho1
Jerome CountyIdaho2
Latah CountyIdaho1
Lemhi CountyIdaho1
Lincoln CountyIdaho2
Minidoka CountyIdaho2
Oneida CountyIdaho2
Owyhee CountyIdaho2
Payette CountyIdaho2
Power CountyIdaho2
Shoshone CountyIdaho1
Twin Falls CountyIdaho2
Valley CountyIdaho1

Sources

  1. Idaho: EPA Map of Radon Zones, US Environmental Protection Agency, checked 1 November 2026
  2. EPA Map of Radon Zones, US Environmental Protection Agency, checked 1 November 2026
  3. Idaho: EPA Map of Radon Zones, US Environmental Protection Agency, checked 1 November 2026
  4. EPA Map of Radon Zones, US Environmental Protection Agency, checked 1 November 2026
  5. Idaho: EPA Map of Radon Zones, US Environmental Protection Agency, checked 1 November 2026
  6. EPA Map of Radon Zones, US Environmental Protection Agency, checked 1 November 2026
  7. Idaho: EPA Map of Radon Zones, US Environmental Protection Agency, checked 1 November 2026
  8. EPA Map of Radon Zones, US Environmental Protection Agency, checked 1 November 2026
  9. Idaho: EPA Map of Radon Zones, US Environmental Protection Agency, checked 1 November 2026
  10. EPA Map of Radon Zones, US Environmental Protection Agency, checked 1 November 2026
  11. Idaho: EPA Map of Radon Zones, US Environmental Protection Agency, checked 1 November 2026
  12. EPA Map of Radon Zones, US Environmental Protection Agency, checked 1 November 2026

"Secondary" marks a source used only because the official page could not be read.