Radon by ZIP

Radon zones in Florida

Last updated

EPA’s Map of Radon Zones places 67 Florida counties in its three radon potential zones: 0 in Zone 1 (highest), 9 in Zone 2 (moderate), and 58 in Zone 3 (low).

0Zone 1 · Highest potential
9Zone 2 · Moderate potential
58Zone 3 · Low potential

What this means for Florida homes

Most Florida counties fall in Zone 3. EPA predicts lower average indoor levels (below 2 pCi/L) across much of Florida. That does not mean your home is low: EPA notes that elevated levels are found in Zone 3 counties too.

EPA’s guidance is the same everywhere: test your home, fix it if the level is 4 pCi/L or higher, and consider fixing between 2 and 4 pCi/L. The zone map is from 1993 and should not be used to decide whether a single home needs testing.

Florida radon program

EPA lists the following state contact for Florida: the state radon program, phone 850-245-4288. Website: radon.doh.state.fl.us. State programs can tell you about local testing data, free or discounted test kits, disclosure rules for home sales, and credentialed radon professionals.

Florida counties and their EPA radon zones

CountyEPA radon zone
Alachua CountyZone 2
Baker CountyZone 3
Bay CountyZone 3
Bradford CountyZone 3
Brevard CountyZone 3
Broward CountyZone 3
Calhoun CountyZone 3
Charlotte CountyZone 3
Citrus CountyZone 2
Clay CountyZone 3
Collier CountyZone 3
Columbia CountyZone 2
DeSoto CountyZone 3
Dixie CountyZone 3
Duval CountyZone 3
Escambia CountyZone 3
Flagler CountyZone 3
Franklin CountyZone 3
Gadsden CountyZone 3
Gilchrist CountyZone 3
Glades CountyZone 3
Gulf CountyZone 3
Hamilton CountyZone 3
Hardee CountyZone 3
Hendry CountyZone 3
Hernando CountyZone 3
Highlands CountyZone 3
Hillsborough CountyZone 2
Holmes CountyZone 3
Indian River CountyZone 3
Jackson CountyZone 3
Jefferson CountyZone 3
Lafayette CountyZone 3
Lake CountyZone 3
Lee CountyZone 3
Leon CountyZone 2
Levy CountyZone 3
Liberty CountyZone 3
Madison CountyZone 3
Manatee CountyZone 3
Marion CountyZone 2
Martin CountyZone 3
Miami-Dade CountyZone 2
Monroe CountyZone 3
Nassau CountyZone 3
Okaloosa CountyZone 3
Okeechobee CountyZone 3
Orange CountyZone 3
Osceola CountyZone 3
Palm Beach CountyZone 3
Pasco CountyZone 3
Pinellas CountyZone 3
Polk CountyZone 2
Putnam CountyZone 3
Santa Rosa CountyZone 3
Sarasota CountyZone 3
Seminole CountyZone 3
St. Johns CountyZone 3
St. Lucie CountyZone 3
Sumter CountyZone 3
Suwannee CountyZone 3
Taylor CountyZone 3
Union CountyZone 2
Volusia CountyZone 3
Wakulla CountyZone 3
Walton CountyZone 3
Washington CountyZone 3

County names follow the 2020 Census. Zones from the EPA Map of Radon Zones (text version). Rows marked “zone of” use the zone EPA gave the predecessor or surrounding county.

Next steps: read how to test your home, check a result with the level calculator, or look up a single address by ZIP code.

Sources

  1. U.S. EPA, EPA Map of Radon Zones (text version)
  2. U.S. EPA, EPA Map of Radon Zones and Supplemental Information (state radon contacts)
  3. U.S. EPA, EPA Maps of Radon Zones and Supporting Documents by State