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Florida Radon Map and Levels by County

Florida's counties span EPA Zones 2 and 3. Homes with elevated levels occur in all three zones, so only a test measures yours.

Data checked By Radon411Methodology

How to test this homeFind a certified tester

  • Share at 4+ pCi/L

    22.8%

    1.1 pts below U.S.

    Florida
    22.8%
    U.S.
    23.9%

    61,392 tests across 54 counties, 2022

  • Rank among states

    9 of 16

    Ten highest states

    Florida
    22.8%
    Wisconsin
    42.9%

    By share, every state pooled the same way, 2022

  • Counties in EPA Zone 1

    0 of 67

    None at highest potential

    Zone 1
    0
    Zone 2
    9

    Most counties sit in Zone 3; Zone 1 is the highest potential

  • Highest county

    54.7%

    Palm Beach County

    Palm Beach
    54.7%
    Hardee
    0.0%

    Counties with 30+ tests, 2022

Read a result for Florida

Starts at EPA's action level

4.0pCi/L

EPA’s own thresholds; the figures are the area’s, never this home’s.

EPA’s reading of 4.0 pCi/L

At or above 4 pCi/L

  1. Under 20 to 1.9 pCi/L
  2. 2 to 4consider a fix
  3. 4 and aboveEPA says fix it

This result is at or above 4 pCi/L. EPA recommends fixing a home when the radon level is 4 pCi/L or higher. 22.8% of Florida's reported tests reached 4 pCi/L, 2022.

Interpret this readingWhat a fix costs

The data

Florida, At a glance

Florida at a glance

Predicted: EPA radon zone

67 of 67 counties classified

EPA classifies counties, not states. Of the 67 counties in Florida with a zone, 9 are in Zone 2 and 58 in Zone 3.

  • Zone 2: Moderate predicted potential2 to 4 pCi/L9 of 67 counties · 13.4%
  • Zone 3: Lower predicted potentialless than 2 pCi/L58 of 67 counties · 86.6%

An EPA radon zone predicts a whole county. It is not intended to determine whether any individual home should be tested: homes with elevated levels occur in all three zones, and EPA recommends testing every home regardless of zone.

Predicted: EPA Map of Radon Zones

Measured: tests reported to CDC

CDC test figures, county by county

CDC publishes Florida's radon test figures by county: 65 of its 67 counties have one. Each one's share is in the county list.

How to read these figures

Florida, Compared

Florida radon figures, compared

Calculated by Radon411
Florida, 2022
22.8%
of 61,392 tests at or above 4 pCi/L, pooled
Against the U.S.
−1.1points
23.9% pooled
Rank among the states
9 of 16
1 is the highest share
Counties with 30 or more tests
40
Highest
54.7%
Palm Beach County
Lowest
0.0%
Hardee County

About 2 in 10 of the 61,392 tests reported for Florida in 2022 came back at or above 4 pCi/L (22.8%, 54 counties pooled). That is 9th of 16 states with county figures for the period; Tennessee (23.8%) above it and New York (22.4%) below.

By band, 2 counties at 50% or more, 1 county at 30% to 50%, 11 counties at 15% to 30%, 7 counties at 5% to 15%, 19 counties at under 5%. Its 40 counties with 30 or more tests run from 0.0% in Hardee County to 54.7% in Palm Beach County; in 2 of them half or more of the reported tests reached 4 pCi/L.

EPA's 1993 map puts 0 of its 67 classified counties in Zone 1; the tests reported since bear that out at 22.8%. The national pool for the same period is 23.9%, so Florida runs 1.1 points below the country.

Year by year (10 years pooled), the share went from 25.7% (2014) to 18.5% (2023), down 7.2 points, with 2019 the highest at 29.6%.

Florida ranked among 16 states by pooled share of tests at or above 4 pCi/L, 2022
StateRankCountiesTestsAt or above 4 pCi/L
Utah4 of 162841,00437.7%
Nebraska5 of 168211,19334.0%
Kansas6 of 169618,38532.0%
Minnesota7 of 168723,45831.6%
Tennessee8 of 16789,60623.8%
Florida9 of 165461,39222.8%
New York10 of 16421,37722.4%
Oregon11 of 16336,83420.2%
Vermont12 of 16144,06219.4%
Alaska13 of 161931411.5%
North Carolina14 of 165759010.7%
Florida's highest and lowest counties with 30 or more tests, by share at or above 4 pCi/L, 2022
CountyRankTestsAt or above 4 pCi/L
Palm Beach County1 of 405,41254.7%
Broward County2 of 407,06250.8%
Marion County3 of 4054631.9%
Charlotte County4 of 406627.3%
Collier County5 of 408,35825.0%
Lee County6 of 405,19622.9%
Monroe County7 of 407520.0%
Alachua County8 of 401,71919.5%
Sarasota County9 of 4081619.5%
DeSoto County10 of 409618.8%
Hardee County40 of 40300.0%
Bay County39 of 40300.0%
Nassau County38 of 40330.0%
Madison County37 of 40450.0%
St. Johns County36 of 40540.0%
Florida's counties with 30 or more tests, by their own share at or above 4 pCi/L, 2022
ShareCountiesTheir testsFor example
50% or more212,474Palm Beach County, Broward County
30% to 50%1546Marion County
15% to 30%1133,123Charlotte County, Collier County, Lee County
5% to 15%76,051Indian River County, Brevard County, Jefferson County
Under 5%199,078St. Lucie County, Santa Rosa County, Okaloosa County
Florida pooled by year, against the United States
YearCountiesTestsAt or above 4 pCi/LUnited StatesChange from the row before
20234916,58918.5%33.4%−4.3 points
20225461,39222.8%23.9%+7.3 points
20215516,06615.4%24.4%−7.8 points
20204812,19823.2%25.5%−6.5 points
20194313,36729.6%29.0%+6.1 points
20184712,87523.5%29.1%+1.8 points
20174711,76621.7%31.7%−2.6 points
2016489,60424.3%31.2%−2.2 points
20154711,37226.5%35.5%+0.7 points
20144310,82825.7%34.9%First on file

Pooled shares: Radon411's sum of CDC's county counts for one period. CDC publishes no state or national figure.

Florida, Counties

Florida counties by EPA zone

Predicted

All 67 counties, grouped by the zone EPA predicts and ordered by their reported share at or above 4 pCi/L, under Florida's map. Each county has a page of its own.

Florida radon map by county: EPA radon zones. Map of Florida's 67 counties shaded by EPA radon zone: Zone 2 in amber, Zone 3 in pale sand. 0 in Zone 1, 9 in Zone 2, 58 in Zone 3.
Florida radon map by countyEPA radon zones for Florida's counties: 0 counties in Zone 1, 9 counties in Zone 2, 58 counties in Zone 3.A prediction for each county, not a reading of any home; elevated homes occur in all three zones.

The 12 highest in Florida, 2022

Zone 2: moderate predicted potential9

Local help

Florida, Local resources

Local resources in Florida

Who to ask in Florida: its radon program, test kits and professionals.

What Florida's program says
Phone
850-245-4288
Email
PHtoxicology@FLhealth.gov
Licensing of radon professionals
Florida Statutes require the certification of businesses and individuals providing radon services or any other radon related activity.

What it means

Florida, Questions

Questions about radon in Florida

Is radon a problem in Florida?

Of the 67 counties in Florida that EPA's Map of Radon Zones classifies, 0 carry Zone 1 (the highest predicted potential), 9 Zone 2 and 58 Zone 3. Pooled from 54 counties, 22.8% of the 61,392 radon tests reported to CDC in 2022 were at or above 4 pCi/L, 9th of 16 states.

Who does radon mitigation in Florida?

77 radon businesses are listed for Florida, for testing, mitigation or both; each listing names the licensing list it was read from.

Which Florida counties have the highest radon?

Palm Beach County 54.7% (5,412 tests) leads Florida by the share of reported tests at or above 4 pCi/L, 2022, then Broward County 50.8% (7,062 tests), Marion County 31.9% (546 tests), Charlotte County 27.3% (66 tests), Collier County 25.0% (8,358 tests).

Which EPA region is Florida in?

Florida is in EPA Region 4: Southeast.

Products

Florida, Products

Testing a home in Florida

22.8% of the 61,392 tests reported to CDC for Florida in 2022 reached 4 pCi/L: a short-term kit (2 to 90 days) gives a first answer in days, a long-term test the year-round average. A short-term kit (2 to 90 days) is the quick first check for a home in Florida; a long-term test tells the year-round average.

Test kits and monitors3

See every kit and monitor

Best radon monitors for Florida homes, compared

Explore

Cities in Florida with their own page

Radon data is published by county, not by city. Each city page sets the figures of the counties the city lies in side by side.