EPA Zone Data 2026
Mississippi Radon Map, Levels & Testing Guide
View EPA radon zone classifications for every county in Mississippi. Open your county to compare basement test meaning, EPA action thresholds, and when mitigation pricing becomes worth checking.
0
Zone 1
High Risk
High Risk
8
Zone 2
Moderate
Moderate
74
Zone 3
Low Risk
Low Risk
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Browse Counties
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Open your county to see its EPA zone, testing meaning, and the point where mitigation becomes worth pricing.
Alcorn County
Zone 2
Chickasaw County
Zone 2
Clay County
Zone 2
Lee County
Zone 2
Lowndes County
Zone 2
Noxubee County
Zone 2
Pontotoc County
Zone 2
Union County
Zone 2
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