Florida Radon Levels
0Zone 1 (High)
9Zone 2 (Moderate)
58Zone 3 (Low)
No counties in Florida are classified as Zone 1 (highest risk), but 9 counties are Zone 2 (moderate potential). The EPA recommends testing all homes regardless of zone classification, as elevated radon can occur in any zone.
| County | EPA Zone | Risk Level |
|---|---|---|
| Alachua County | Zone 2 | Moderate Potential |
| Baker County | Zone 3 | Lowest Potential |
| Bay County | Zone 3 | Lowest Potential |
| Bradford County | Zone 3 | Lowest Potential |
| Brevard County | Zone 3 | Lowest Potential |
| Broward County | Zone 3 | Lowest Potential |
| Calhoun County | Zone 3 | Lowest Potential |
| Charlotte County | Zone 3 | Lowest Potential |
| Citrus County | Zone 2 | Moderate Potential |
| Clay County | Zone 3 | Lowest Potential |
| Collier County | Zone 3 | Lowest Potential |
| Columbia County | Zone 2 | Moderate Potential |
| DeSoto County | Zone 3 | Lowest Potential |
| Dixie County | Zone 3 | Lowest Potential |
| Duval County | Zone 3 | Lowest Potential |
| Escambia County | Zone 3 | Lowest Potential |
| Flagler County | Zone 3 | Lowest Potential |
| Franklin County | Zone 3 | Lowest Potential |
| Gadsden County | Zone 3 | Lowest Potential |
| Gilchrist County | Zone 3 | Lowest Potential |
| Glades County | Zone 3 | Lowest Potential |
| Gulf County | Zone 3 | Lowest Potential |
| Hamilton County | Zone 3 | Lowest Potential |
| Hardee County | Zone 3 | Lowest Potential |
| Hendry County | Zone 3 | Lowest Potential |
| Hernando County | Zone 3 | Lowest Potential |
| Highlands County | Zone 3 | Lowest Potential |
| Hillsborough County | Zone 2 | Moderate Potential |
| Holmes County | Zone 3 | Lowest Potential |
| Indian River County | Zone 3 | Lowest Potential |
| Jackson County | Zone 3 | Lowest Potential |
| Jefferson County | Zone 3 | Lowest Potential |
| Lafayette County | Zone 3 | Lowest Potential |
| Lake County | Zone 3 | Lowest Potential |
| Lee County | Zone 3 | Lowest Potential |
| Leon County | Zone 2 | Moderate Potential |
| Levy County | Zone 3 | Lowest Potential |
| Liberty County | Zone 3 | Lowest Potential |
| Madison County | Zone 3 | Lowest Potential |
| Manatee County | Zone 3 | Lowest Potential |
| Marion County | Zone 2 | Moderate Potential |
| Martin County | Zone 3 | Lowest Potential |
| Miami-Dade County | Zone 2 | Moderate Potential |
| Monroe County | Zone 3 | Lowest Potential |
| Nassau County | Zone 3 | Lowest Potential |
| Okaloosa County | Zone 3 | Lowest Potential |
| Okeechobee County | Zone 3 | Lowest Potential |
| Orange County | Zone 3 | Lowest Potential |
| Osceola County | Zone 3 | Lowest Potential |
| Palm Beach County | Zone 3 | Lowest Potential |
| Pasco County | Zone 3 | Lowest Potential |
| Pinellas County | Zone 3 | Lowest Potential |
| Polk County | Zone 2 | Moderate Potential |
| Putnam County | Zone 3 | Lowest Potential |
| St. Johns County | Zone 3 | Lowest Potential |
| St. Lucie County | Zone 3 | Lowest Potential |
| Santa Rosa County | Zone 3 | Lowest Potential |
| Sarasota County | Zone 3 | Lowest Potential |
| Seminole County | Zone 3 | Lowest Potential |
| Sumter County | Zone 3 | Lowest Potential |
| Suwannee County | Zone 3 | Lowest Potential |
| Taylor County | Zone 3 | Lowest Potential |
| Union County | Zone 2 | Moderate Potential |
| Volusia County | Zone 3 | Lowest Potential |
| Wakulla County | Zone 3 | Lowest Potential |
| Walton County | Zone 3 | Lowest Potential |
| Washington County | Zone 3 | Lowest Potential |