Radon levels in Florida: Low
The model predicts a population-weighted basement average of 1.3 pCi/L across Florida's 67 counties - about 31% below the US average of 1.8 pCi/L. Above-ground floors average 1.0 pCi/L.
Predicted (model estimate). The pCi/L figures on this page are long-term area averages from a peer-reviewed national model built on millions of real radon tests (2001-2021). They describe the typical home in this area - not your home, which can be several times higher or lower. The EPA radon zone is a separate, 1993 county-level classification. How the numbers work.
0 / 67
EPA Zone 1 counties (0%)
9 / 58
Zone 2 / Zone 3 counties
0
counties predicted ≥ 4 pCi/L
0%
of ZIP codes predicted ≥ 4 pCi/L
Florida counties by predicted radon
Sorted highest to lowest predicted basement average. 67 counties.
| County | Predicted basement | Upstairs | Grade | EPA zone | ZIPs |
|---|---|---|---|---|---|
| Jefferson County | 1.6 pCi/L | 1.1 | Low | EPA Zone 3 | 1 |
| Wakulla County | 1.5 pCi/L | 1.1 | Low | EPA Zone 3 | 4 |
| Columbia County | 1.5 pCi/L | 1.1 | Low | EPA Zone 2 | 6 |
| Gadsden County | 1.5 pCi/L | 1.1 | Low | EPA Zone 3 | 6 |
| Madison County | 1.5 pCi/L | 1.0 | Low | EPA Zone 3 | 4 |
| Washington County | 1.5 pCi/L | 0.9 | Low | EPA Zone 3 | 4 |
| Alachua County | 1.5 pCi/L | 1.5 | Low | EPA Zone 2 | 17 |
| Marion County | 1.5 pCi/L | 1.4 | Low | EPA Zone 2 | 23 |
| Taylor County | 1.5 pCi/L | 1.0 | Low | EPA Zone 3 | 4 |
| Union County | 1.5 pCi/L | 0.9 | Low | EPA Zone 2 | 2 |
| Holmes County | 1.4 pCi/L | 1.0 | Low | EPA Zone 3 | 2 |
| Nassau County | 1.4 pCi/L | 0.8 | Low | EPA Zone 3 | 5 |
| Santa Rosa County | 1.4 pCi/L | 0.9 | Low | EPA Zone 3 | 7 |
| Baker County | 1.4 pCi/L | 0.8 | Low | EPA Zone 3 | 3 |
| Levy County | 1.4 pCi/L | 1.1 | Low | EPA Zone 3 | 7 |
| Calhoun County | 1.4 pCi/L | 0.9 | Low | EPA Zone 3 | 4 |
| Gilchrist County | 1.4 pCi/L | 1.1 | Low | EPA Zone 3 | 2 |
| Jackson County | 1.4 pCi/L | 1.0 | Low | EPA Zone 3 | 11 |
| Citrus County | 1.4 pCi/L | 1.1 | Low | EPA Zone 2 | 13 |
| Hamilton County | 1.4 pCi/L | 0.9 | Low | EPA Zone 3 | 2 |
| Lee County | 1.4 pCi/L | 1.5 | Low | EPA Zone 3 | 33 |
| Charlotte County | 1.4 pCi/L | 1.4 | Low | EPA Zone 3 | 13 |
| Lafayette County | 1.4 pCi/L | 1.1 | Low | EPA Zone 3 | 2 |
| Sarasota County | 1.4 pCi/L | 1.4 | Low | EPA Zone 3 | 24 |
| Suwannee County | 1.4 pCi/L | 1.0 | Low | EPA Zone 3 | 5 |
| Walton County | 1.4 pCi/L | 0.8 | Low | EPA Zone 3 | 6 |
| Clay County | 1.4 pCi/L | 0.8 | Low | EPA Zone 3 | 6 |
| Dixie County | 1.4 pCi/L | 1.0 | Low | EPA Zone 3 | 4 |
| St. Johns County | 1.4 pCi/L | 0.8 | Low | EPA Zone 3 | 10 |
| Leon County | 1.3 pCi/L | 1.2 | Low | EPA Zone 2 | 10 |
| Collier County | 1.3 pCi/L | 1.5 | Low | EPA Zone 3 | 19 |
| Manatee County | 1.3 pCi/L | 1.2 | Low | EPA Zone 3 | 17 |
| Polk County | 1.3 pCi/L | 1.0 | Low | EPA Zone 2 | 30 |
| Flagler County | 1.3 pCi/L | 0.7 | Low | EPA Zone 3 | 4 |
| Gulf County | 1.3 pCi/L | 0.8 | Low | EPA Zone 3 | 2 |
| DeSoto County | 1.3 pCi/L | 0.8 | Low | EPA Zone 3 | 2 |
| Franklin County | 1.3 pCi/L | 0.8 | Low | EPA Zone 3 | 3 |
| Hardee County | 1.3 pCi/L | 1.0 | Low | EPA Zone 3 | 4 |
| Okaloosa County | 1.3 pCi/L | 0.9 | Low | EPA Zone 3 | 13 |
| St. Lucie County | 1.3 pCi/L | 0.9 | Low | EPA Zone 3 | 14 |
| Bradford County | 1.3 pCi/L | 0.8 | Low | EPA Zone 3 | 4 |
| Brevard County | 1.3 pCi/L | 0.8 | Low | EPA Zone 3 | 27 |
| Escambia County | 1.3 pCi/L | 0.8 | Low | EPA Zone 3 | 16 |
| Lake County | 1.3 pCi/L | 0.8 | Low | EPA Zone 3 | 23 |
| Liberty County | 1.3 pCi/L | 0.8 | Low | EPA Zone 3 | 2 |
| Martin County | 1.3 pCi/L | 1.1 | Low | EPA Zone 3 | 9 |
| Bay County | 1.3 pCi/L | 0.7 | Low | EPA Zone 3 | 11 |
| Hernando County | 1.3 pCi/L | 0.9 | Low | EPA Zone 3 | 9 |
| Palm Beach County | 1.3 pCi/L | 1.1 | Low | EPA Zone 3 | 50 |
| Sumter County | 1.3 pCi/L | 1.0 | Low | EPA Zone 3 | 8 |
| Pasco County | 1.3 pCi/L | 0.9 | Low | EPA Zone 3 | 22 |
| Putnam County | 1.3 pCi/L | 0.8 | Low | EPA Zone 3 | 11 |
| Indian River County | 1.3 pCi/L | 0.9 | Low | EPA Zone 3 | 8 |
| Osceola County | 1.2 pCi/L | 0.7 | Low | EPA Zone 3 | 12 |
| Seminole County | 1.2 pCi/L | 0.8 | Low | EPA Zone 3 | 14 |
| Hillsborough County | 1.2 pCi/L | 0.9 | Low | EPA Zone 2 | 51 |
| Volusia County | 1.2 pCi/L | 0.7 | Low | EPA Zone 3 | 26 |
| Glades County | 1.2 pCi/L | 1.1 | Low | EPA Zone 3 | 2 |
| Hendry County | 1.2 pCi/L | 1.0 | Low | EPA Zone 3 | 3 |
| Okeechobee County | 1.2 pCi/L | 0.7 | Low | EPA Zone 3 | 1 |
| Duval County | 1.2 pCi/L | 0.6 | Low | EPA Zone 3 | 32 |
| Monroe County | 1.2 pCi/L | 1.1 | Low | EPA Zone 3 | 7 |
| Broward County | 1.2 pCi/L | 1.0 | Low | EPA Zone 3 | 53 |
| Orange County | 1.2 pCi/L | 0.7 | Low | EPA Zone 3 | 41 |
| Highlands County | 1.2 pCi/L | 0.8 | Low | EPA Zone 3 | 8 |
| Miami-Dade County | 1.1 pCi/L | 1.1 | Low | EPA Zone 2 | 77 |
| Pinellas County | 1.1 pCi/L | 0.8 | Low | EPA Zone 3 | 47 |
Florida radon questions
- Is radon high in Florida?
- Florida's population-weighted predicted basement average is 1.3 pCi/L, about 31% below the US average of 1.8. 0 of its 67 modeled counties are predicted at or above the EPA action level of 4 pCi/L, 0 are in the 2-4 "consider fixing" range and 67 are below 2. 0% of Florida ZIP codes are predicted at 4 or higher.
- Which Florida county has the highest radon?
- Jefferson County has the highest predicted basement average in Florida at 1.6 pCi/L (EPA Zone 3). The lowest is Pinellas County at 1.1 pCi/L. These are modeled area averages; individual homes in any county can test far higher.
- How many EPA Zone 1 counties are in Florida?
- 0 of Florida's 67 counties (0%) are EPA Zone 1 (highest potential), 9 are Zone 2 and 58 are Zone 3. The EPA zone map dates from 1993; the predicted values on this page come from a 2001-2021 model built on millions of actual tests, so the two can disagree for a given county.
- Should I test for radon in Florida?
- Yes. Even though Florida's predicted average is below 2 pCi/L, the EPA recommends every home be tested - radon varies house to house, and 0% of Florida ZIP codes are still predicted at 2 pCi/L or higher.
Florida radon program
Many states offer free or discounted test kits and keep lists of certified mitigators. Find the Florida radon office through the EPA state radon contacts page. Then read how to test and what mitigation costs.