EPA Zone Data 2026
AZ Radon Levels
View EPA radon zone classifications for every county in AZ. Select your county to see detailed risk data, testing recommendations, and mitigation cost estimates.
0
Zone 1
High Risk
High Risk
15
Zone 2
Moderate
Moderate
0
Zone 3
Low Risk
Low Risk
Apache
Zone 2
Cochise
Zone 2
Coconino
Zone 2
Gila
Zone 2
Graham
Zone 2
Greenlee
Zone 2
La Paz
Zone 2
Maricopa
Zone 2
Mohave
Zone 2
Navajo
Zone 2
Pima
Zone 2
Pinal
Zone 2
Santa Cruz
Zone 2
Yavapai
Zone 2
Yuma
Zone 2
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