EPA Zone Data 2026
Michigan Radon Map, Levels & Testing Guide
View EPA radon zone classifications for every county in Michigan. Open your county to compare basement test meaning, EPA action thresholds, and when mitigation pricing becomes worth checking.
9
Zone 1
High Risk
High Risk
32
Zone 2
Moderate
Moderate
42
Zone 3
Low Risk
Low Risk
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Browse Counties
Jump to the Directory
Open your county to see its EPA zone, testing meaning, and the point where mitigation becomes worth pricing.
Alcona County
Zone 2
Alger County
Zone 2
Alpena County
Zone 2
Antrim County
Zone 2
Baraga County
Zone 2
Barry County
Zone 2
Branch County
Zone 1
Calhoun County
Zone 1
Cass County
Zone 1
Charlevoix County
Zone 2
Clinton County
Zone 2
Dickinson County
Zone 2
Eaton County
Zone 2
Emmet County
Zone 2
Genesee County
Zone 2
Gogebic County
Zone 2
Hillsdale County
Zone 1
Houghton County
Zone 2
Ingham County
Zone 2
Ionia County
Zone 2
Iron County
Zone 2
Jackson County
Zone 1
Kalamazoo County
Zone 1
Kent County
Zone 2
Keweenaw County
Zone 2
Lapeer County
Zone 2
Leelanau County
Zone 2
Lenawee County
Zone 1
Livingston County
Zone 2
Marquette County
Zone 2
Menominee County
Zone 2
Monroe County
Zone 2
Montcalm County
Zone 2
Montmorency County
Zone 2
Oakland County
Zone 2
Otsego County
Zone 2
Presque Isle County
Zone 2
Sanilac County
Zone 2
Shiawassee County
Zone 2
St. Joseph County
Zone 1
Washtenaw County
Zone 1
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