Radon levels in Florida

Verified county-level radon indicators are available for 62 Florida counties. Select a county for its source period and sample details.

High results are most common in Marion County (43%) and least common in St. Lucie County (0%)Share of tests at or above 4 pCi/L by county · Radon test results from laboratories, 2008–2017 · 62 of 67 counties have data
Alachua County: 35% of tests at or above 4 pCi/L · 2,162 testsBaker County: 0% of tests at or above 4 pCi/L · 1 testsBay County: 13% of tests at or above 4 pCi/L · 16 testsBradford County: 0% of tests at or above 4 pCi/L · 5 testsBrevard County: 3% of tests at or above 4 pCi/L · 839 testsBroward County: 7% of tests at or above 4 pCi/L · 656 testsCalhoun County: no dataCharlotte County: 25% of tests at or above 4 pCi/L · 162 testsCitrus County: 10% of tests at or above 4 pCi/L · 162 testsClay County: 13% of tests at or above 4 pCi/L · 23 testsCollier County: 26% of tests at or above 4 pCi/L · 20,308 testsColumbia County: 7% of tests at or above 4 pCi/L · 30 testsDeSoto County: 4% of tests at or above 4 pCi/L · 45 testsDixie County: 100% of tests at or above 4 pCi/L · 1 testsDuval County: 1% of tests at or above 4 pCi/L · 480 testsEscambia County: 2% of tests at or above 4 pCi/L · 65 testsFlagler County: 5% of tests at or above 4 pCi/L · 21 testsFranklin County: 0% of tests at or above 4 pCi/L · 3 testsGadsden County: 6% of tests at or above 4 pCi/L · 143 testsGilchrist County: 0% of tests at or above 4 pCi/L · 10 testsGlades County: 0% of tests at or above 4 pCi/L · 3 testsGulf County: no dataHamilton County: no dataHardee County: 0% of tests at or above 4 pCi/L · 1 testsHendry County: 7% of tests at or above 4 pCi/L · 14 testsHernando County: 2% of tests at or above 4 pCi/L · 223 testsHighlands County: 0% of tests at or above 4 pCi/L · 25 testsHillsborough County: 18% of tests at or above 4 pCi/L · 3,586 testsHolmes County: 0% of tests at or above 4 pCi/L · 7 testsIndian River County: 3% of tests at or above 4 pCi/L · 157 testsJackson County: 6% of tests at or above 4 pCi/L · 67 testsJefferson County: 6% of tests at or above 4 pCi/L · 49 testsLafayette County: no dataLake County: 3% of tests at or above 4 pCi/L · 96 testsLee County: 25% of tests at or above 4 pCi/L · 11,873 testsLeon County: 23% of tests at or above 4 pCi/L · 5,148 testsLevy County: 13% of tests at or above 4 pCi/L · 23 testsLiberty County: no dataMadison County: 13% of tests at or above 4 pCi/L · 8 testsManatee County: 13% of tests at or above 4 pCi/L · 552 testsMarion County: 43% of tests at or above 4 pCi/L · 903 testsMartin County: 11% of tests at or above 4 pCi/L · 196 testsMiami-Dade County: 19% of tests at or above 4 pCi/L · 934 testsMonroe County: 20% of tests at or above 4 pCi/L · 15 testsNassau County: 2% of tests at or above 4 pCi/L · 50 testsOkaloosa County: 3% of tests at or above 4 pCi/L · 34 testsOkeechobee County: 0% of tests at or above 4 pCi/L · 3 testsOrange County: 4% of tests at or above 4 pCi/L · 227 testsOsceola County: 1% of tests at or above 4 pCi/L · 240 testsPalm Beach County: 8% of tests at or above 4 pCi/L · 994 testsPasco County: 10% of tests at or above 4 pCi/L · 154 testsPinellas County: 12% of tests at or above 4 pCi/L · 280 testsPolk County: 28% of tests at or above 4 pCi/L · 617 testsPutnam County: 1% of tests at or above 4 pCi/L · 95 testsSt. Johns County: 6% of tests at or above 4 pCi/L · 50 testsSt. Lucie County: 0% of tests at or above 4 pCi/L · 46 testsSanta Rosa County: 2% of tests at or above 4 pCi/L · 51 testsSarasota County: 18% of tests at or above 4 pCi/L · 878 testsSeminole County: 4% of tests at or above 4 pCi/L · 430 testsSumter County: 26% of tests at or above 4 pCi/L · 58 testsSuwannee County: 0% of tests at or above 4 pCi/L · 21 testsTaylor County: 0% of tests at or above 4 pCi/L · 3 testsUnion County: 67% of tests at or above 4 pCi/L · 3 testsVolusia County: 2% of tests at or above 4 pCi/L · 457 testsWakulla County: 9% of tests at or above 4 pCi/L · 79 testsWalton County: 20% of tests at or above 4 pCi/L · 10 testsWashington County: 0% of tests at or above 4 pCi/L · 2 tests
  • Under 10%
  • 10–20%
  • 20–30%
  • 30–40%
  • 40% or more
  • No data

Counties

CountyTests% ≥ 4 pCi/LMedian (pCi/L)EPA zone (1993)Source
Alachua County2,16235%2.9Zone 2Radon test results from laboratories through 2017
Baker County10%1.0Zone 3Radon test results from laboratories through 2017
Bay County1613%0.9Zone 3Radon test results from laboratories through 2017
Bradford County50%2.0Zone 3Radon test results from laboratories through 2017
Brevard County8393%0.8Zone 3Radon test results from laboratories through 2017
Broward County6567%1.1Zone 3Radon test results from laboratories through 2017
Calhoun County———Zone 3—
Charlotte County16225%2.2Zone 3Radon test results from laboratories through 2017
Citrus County16210%1.6Zone 2Radon test results from laboratories through 2017
Clay County2313%1.2Zone 3Radon test results from laboratories through 2017
Collier County20,30826%2.4Zone 3Radon test results from laboratories through 2017
Columbia County307%1.0Zone 2Radon test results from laboratories through 2017
DeSoto County454%0.6Zone 3Radon test results from laboratories through 2017
Dixie County1100%5.4Zone 3Radon test results from laboratories through 2017
Duval County4801%0.5Zone 3Radon test results from laboratories through 2017
Escambia County652%0.9Zone 3Radon test results from laboratories through 2017
Flagler County215%1.2Zone 3Radon test results from laboratories through 2017
Franklin County30%0.1Zone 3Radon test results from laboratories through 2017
Gadsden County1436%1.2Zone 3Radon test results from laboratories through 2017
Gilchrist County100%0.7Zone 3Radon test results from laboratories through 2017
Glades County30%1.7Zone 3Radon test results from laboratories through 2017
Gulf County———Zone 3—
Hamilton County———Zone 3—
Hardee County10%1.9Zone 3Radon test results from laboratories through 2017
Hendry County147%1.0Zone 3Radon test results from laboratories through 2017
Hernando County2232%0.8Zone 3Radon test results from laboratories through 2017
Highlands County250%0.7Zone 3Radon test results from laboratories through 2017
Hillsborough County3,58618%1.3Zone 2Radon test results from laboratories through 2017
Holmes County70%0.6Zone 3Radon test results from laboratories through 2017
Indian River County1573%0.7Zone 3Radon test results from laboratories through 2017
Jackson County676%0.7Zone 3Radon test results from laboratories through 2017
Jefferson County496%1.4Zone 3Radon test results from laboratories through 2017
Lafayette County———Zone 3—
Lake County963%0.9Zone 3Radon test results from laboratories through 2017
Lee County11,87325%2.4Zone 3Radon test results from laboratories through 2017
Leon County5,14823%2.2Zone 2Radon test results from laboratories through 2017
Levy County2313%1.9Zone 3Radon test results from laboratories through 2017
Liberty County———Zone 3—
Madison County813%0.6Zone 3Radon test results from laboratories through 2017
Manatee County55213%1.7Zone 3Radon test results from laboratories through 2017
Marion County90343%3.3Zone 2Radon test results from laboratories through 2017
Martin County19611%0.8Zone 3Radon test results from laboratories through 2017
Miami-Dade County93419%1.6Zone 2Radon test results from laboratories through 2017
Monroe County1520%1.6Zone 3Radon test results from laboratories through 2017
Nassau County502%0.7Zone 3Radon test results from laboratories through 2017
Okaloosa County343%0.6Zone 3Radon test results from laboratories through 2017
Okeechobee County30%1.5Zone 3Radon test results from laboratories through 2017
Orange County2274%1.1Zone 3Radon test results from laboratories through 2017
Osceola County2401%0.8Zone 3Radon test results from laboratories through 2017
Palm Beach County9948%1.0Zone 3Radon test results from laboratories through 2017
Pasco County15410%0.8Zone 3Radon test results from laboratories through 2017
Pinellas County28012%0.8Zone 3Radon test results from laboratories through 2017
Polk County61728%2.1Zone 2Radon test results from laboratories through 2017
Putnam County951%0.1Zone 3Radon test results from laboratories through 2017
Santa Rosa County512%0.8Zone 3Radon test results from laboratories through 2017
Sarasota County87818%1.8Zone 3Radon test results from laboratories through 2017
Seminole County4304%0.7Zone 3Radon test results from laboratories through 2017
St. Johns County506%0.7Zone 3Radon test results from laboratories through 2017
St. Lucie County460%0.1Zone 3Radon test results from laboratories through 2017
Sumter County5826%1.7Zone 3Radon test results from laboratories through 2017
Suwannee County210%1.1Zone 3Radon test results from laboratories through 2017
Taylor County30%2.1Zone 3Radon test results from laboratories through 2017
Union County367%8.5Zone 2Radon test results from laboratories through 2017
Volusia County4572%0.7Zone 3Radon test results from laboratories through 2017
Wakulla County799%1.5Zone 3Radon test results from laboratories through 2017
Walton County1020%1.4Zone 3Radon test results from laboratories through 2017
Washington County20%0.9Zone 3Radon test results from laboratories through 2017

Test your home

County figures show how often tests come back high, not the level in your home. Only a test tells you that: see how to test for radon.

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