Radon Zone Map

All counties

Radon zones in Colorado

Adams CountyColorado1
Alamosa CountyColorado2
Arapahoe CountyColorado1
Archuleta CountyColorado2
Baca CountyColorado1
Bent CountyColorado1
Boulder CountyColorado1
Chaffee CountyColorado1
Cheyenne CountyColorado1
Conejos CountyColorado2
Costilla CountyColorado2
Crowley CountyColorado1
Custer CountyColorado1
Delta CountyColorado1
Denver CountyColorado1
Dolores CountyColorado1
Douglas CountyColorado1
Eagle CountyColorado2
El Paso CountyColorado1
Elbert CountyColorado1
Fremont CountyColorado1
Garfield CountyColorado1
Gilpin CountyColorado1
Grand CountyColorado1
Gunnison CountyColorado1
Hinsdale CountyColorado2
Huerfano CountyColorado1
Jackson CountyColorado1
Kiowa CountyColorado1
Kit Carson CountyColorado1
La Plata CountyColorado2
Lake CountyColorado1
Larimer CountyColorado1
Las Animas CountyColorado1
Lincoln CountyColorado1
Logan CountyColorado1
Mesa CountyColorado1
Mineral CountyColorado2
Moffat CountyColorado1
Montezuma CountyColorado1
Montrose CountyColorado1
Morgan CountyColorado1
Otero CountyColorado1
Ouray CountyColorado1
Park CountyColorado1
Phillips CountyColorado1
Pitkin CountyColorado1
Prowers CountyColorado1
Pueblo CountyColorado1
Rio Blanco CountyColorado1
Rio Grande CountyColorado2
Routt CountyColorado2
Saguache CountyColorado2
San Juan CountyColorado2
San Miguel CountyColorado1
Sedgwick CountyColorado1
Summit CountyColorado1
Teller CountyColorado1
Washington CountyColorado1
Weld CountyColorado1
Yuma CountyColorado1

Sources

  1. Colorado: 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. Colorado: 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. Colorado: 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. Colorado: 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. Colorado: 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. Colorado: 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.