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

Back to Radon Zones in the United States




Radon zones
 Zone 3 (0 counties)
 Zone 2 (15 counties)
 Zone 1 (0 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)
Apache County
Radon zone : 2

Cochise County
Radon zone : 2

Coconino County
Radon zone : 2

Gila County
Radon zone : 2

Graham County
Radon zone : 2

Greenlee County
Radon zone : 2

La Paz County
Radon zone : 2

Maricopa County
Radon zone : 2

Mohave County
Radon zone : 2

Navajo County
Radon zone : 2

Pima County
Radon zone : 2

Pinal County
Radon zone : 2

Santa Cruz County
Radon zone : 2

Yavapai County
Radon zone : 2

Yuma County
Radon zone : 2


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