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Radon Levels in Hardee County, Florida

EPA puts Hardee County in Zone 3, its lowest radon zone, and most reported tests there come back low, though 0.0% of 30 (2022) reached 4 pCi/L. Homes with elevated levels occur in all three zones, so only a test measures yours.

Data checked By Radon411Methodology

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  • Share at 4+ pCi/L

    0.0%

    22.8 pts below FL

    Hardee
    0.0%
    Florida
    22.8%

    30 tests, 2022

  • Median result

    2.5pCi/L

    Below action level

    Hardee
    2.5 pCi/L
    EPA
    4.0 pCi/L

    Midpoint of the tests, 2022

  • Tests reported

    30

    40th of 40 by tests

    Hardee
    30
    Miami-Dade
    9,033

    Reported to CDC before any fix, 2022

  • EPA radon zone

    Zone 3

    Lower potential

    1. 1
    2. 2
    3. Zone 3

    1 highest, 3 lowest

    EPA predicts under 2 pCi/L indoors

  • Rank in Florida

    27 of 40

    Middle half

    Hardee
    0.0%
    Palm Beach
    54.7%

    By share, of 40 with 30+ tests

Read a result for Hardee County

Starts at Hardee County's median, 2.5 pCi/L

2.5pCi/L

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

EPA’s reading of 2.5 pCi/L

Between 2 and 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 between 2 and 4 pCi/L. EPA recommends considering a fix when the level is between 2 and 4 pCi/L. Hardee County's median reported result, 2022.

Interpret this readingWhat a fix costs

The data

Hardee County, At a glance

Hardee County at a glance

Predicted: EPA radon zone

EPA Zone 3: lower predicted potential

is EPA's lowest class, and its forecast for Hardee County as a whole is an average indoor of less than 2 pCi/L (less than 75 Bq/m³). A low zone clears no address in it: homes above EPA's turn up in all three zones.

USGS geologic potential: Low across 74% of the county's area

Predicted: EPA Map of Radon Zones

Measured: tests reported to CDC

Radon tests reported for Hardee County, 2022

Share of reported tests at or above 4 pCi/L, by year, Hardee County
Share of reported tests at or above 4 pCi/L, by year, Hardee County
YearShare of reported tests at or above 4 pCi/L
20150.0%
20210.0%
20220.0%

2022: 0.0%. Across these years the share ran from 0.0% to 0.0%. Each column counts radon tests reported to CDC that year, not homes.

What these figures count

These are the 30 tests reported to CDC for Hardee County over 2022, many from homes being sold or already suspected of a problem: they describe the county's reported tests, not this house.

Measured: CDC tracking data. Figure above: 2022. Measured data period: 2005 to 2022 (every CDC figure on file).

How to read these figures

Hardee County, Compared

Hardee County radon figures, compared

Calculated by Radon411

Only 0 of 30 radon tests reported for Hardee County in 2022 reached 4 pCi/L (0.0%). The median result, 2.5 pCi/L, sits between 2 and EPA's 4 pCi/L action level, and the top reported result was 3.4 pCi/L.

Across 54 Florida counties pooled together, 22.8% of tests reached that level, so Hardee County runs 22.8 points below its state. Against the national pool of 23.9%, the gap is 23.9 points lower. Its place in the state: 27th of 40 Florida counties with 30 or more tests for the same period.

Zone 3 on EPA's map (predicted average under 2 pCi/L) and a 0.0% share point the same way here. Of 4 neighbours with a figure, all 4 reported a larger share at or above 4 pCi/L; the spread is 10.3% (Polk County) to 18.8% (DeSoto County).

Below the action level, 9 tests (30.0%) came in under 2 pCi/L, against 52.6% statewide, and 21 tests (70.0%) fell between 2 and 4, against 24.6% statewide. USGS geology rates 74% of the county's land low radon potential.

The busiest year on file was 2022, with 30 tests reported; the quietest, 2015, had 1.

Hardee County against Florida, the United States and nearby counties, 2022
AreaTestsAt or above 4 pCi/LMedianDifference from Hardee County
Hardee County300.0%2.5 pCi/LThis county
Florida, pooled54 counties, pooled61,39222.8%Not pooled+22.8 points
United States, pooled853 counties, pooled333,14023.9%Not pooled+23.9 points
Palm Beach Countyhighest in the state5,41254.7%4.5 pCi/L+54.7 points
Bay Countylowest in the state300.0%0.5 pCi/LLevel
DeSoto County, FLborders it9618.8%2.3 pCi/L+18.8 points
Manatee County, FLborders it1,26318.5%1.7 pCi/L+18.5 points
Hillsborough County, FLborders it2,20517.6%1.1 pCi/L+17.6 points
Polk County, FLborders it1,71310.3%2.0 pCi/L+10.3 points
Highlands County, FLborders it270.0%1.5 pCi/LLevel
Where Hardee County's reported results fell, 2022, beside Florida and the United States
ResultHardee County testsHardee County shareFlorida shareU.S. shareAgainst Florida
Under 2 pCi/L930.0%52.6%54.5%−22.6 points
2 to 4 pCi/L2170.0%24.6%21.7%+45.4 points
4 pCi/L and above00.0%22.8%23.9%−22.8 points
Hardee County ranked among the 40 Florida counties with 30 or more tests, by share at or above 4 pCi/L, 2022
CountyRankTestsAt or above 4 pCi/LMedian
Seminole County27 of 404020.0%0.8 pCi/L
Volusia County27 of 403540.0%0.6 pCi/L
Osceola County27 of 402580.0%0.7 pCi/L
Lake County27 of 401680.0%0.6 pCi/L
Gadsden County27 of 401440.0%1.4 pCi/L
Clay County27 of 401110.0%2.1 pCi/L
St. Johns County27 of 40540.0%1.1 pCi/L
Madison County27 of 40450.0%0.3 pCi/L
Nassau County27 of 40330.0%0.3 pCi/L
Bay County27 of 40300.0%0.5 pCi/L
Hardee County27 of 40300.0%2.5 pCi/L
Hardee County radon tests by year, against Florida's pooled share
YearTestsAt or above 4 pCi/LMedianHighestFlorida, pooledChange from the row before
2022300.0%2.5 pCi/L3.4 pCi/L22.8%Level
202170.0%0.8 pCi/L1.6 pCi/L15.4%Level
201510.0%0.9 pCi/L0.9 pCi/L26.5%First on file

Pooled shares: Radon411's sum of CDC's county counts for one period.

Hardee County, Geology

The ground under Hardee County

Predicted

USGS's geologic map splits Hardee County: 74.3% of its land is low radon potential and 25.7% moderate. The map puts 74.3% of Hardee County in the area it calls Gulf/Atlantic Lowland and Central Highland and 25.7% in Highland Anomalous areas. USGS gives the first a radon index of 6, in the low band (5 to 8), and the second 11, in the moderate band (9 to 11).

USGS's geologic areas under Hardee County
AreaThe rock, in USGS's wordsPotentialRadon indexShare of land
Gulf/Atlantic Lowland and Central Highlandsand, silt, clay, gravelLow674.3%
Highland Anomalous areasPhosphate deposits.Moderate1125.7%

Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.

Hardee County beside the ground around it

Hardee County has more moderate-potential ground than Florida as a whole: 25.7% of its land against 7.1%. Of the 5 counties that border it, 2 have more moderate-potential ground, Hillsborough County the most at 41.4%.

Share of land by USGS radon potential: Hardee County, the 5 counties bordering it and Florida
AreaEPA zoneLow potentialModerate potentialHigh potential
Hardee CountyZone 374.3%25.7%None
DeSoto CountyZone 399.9%NoneNone
Highlands CountyZone 3100%NoneNone
Manatee CountyZone 386.6%6.9%None
Polk CountyZone 266.3%33.7%None
Hillsborough CountyZone 256.1%41.4%None
Florida67 counties, pooled by land areaVaries89.7%7.1%None

The map rates the ground, not the air in any home.

Local help

Hardee County, Local resources

Radon testing and mitigation in Hardee County

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

Hardee County, Questions

Questions about radon in Hardee County

Are radon levels high in Hardee County?

In 2022, 0.0% of the radon tests reported to CDC for Hardee County, Florida were at or above 4 pCi/L, and the median reported pre-mitigation result was 2.5 pCi/L. Of 40 Florida counties with 30 or more tests for the same period, 26 reported a higher share; pooled, the state comes to 22.8%.

Which counties border Hardee County?

Hardee County borders 5 counties: DeSoto County, Highlands County, Manatee County, Polk County and Hillsborough County.

Products

Hardee County, Products

Testing a home in Hardee County

In Hardee County, 0.0% of 30 tests reported to CDC in 2022 reached 4 pCi/L, against 22.8% pooled across Florida. Zone 3 is the lowest label, yet homes at or above 4 pCi/L occur in every zone: a short-term kit (2 to 90 days) is the quick first check in Hardee County.

Test kits and monitors3

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Best radon monitors for Hardee County homes, compared

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Hardee County, Bordering counties

Counties bordering Hardee County

Calculated by Radon411

Hardee County, Cities and towns

Cities and towns in Hardee County

The Census Bureau estimates 25,932 residents in Hardee County for July 1, 2025, 597 more than in 2020 (+2.4%). That works out to 41 people per square mile of land. No town dominates: Wauchula, the largest, has 4,946 residents, 19.1% of the total. Together its 3 incorporated places hold 35.3% of those residents; the other 64.7% live outside any of them. Reported testing is thin here: 30 tests over 2022, or 1.2 for every 1,000 residents (2025 estimate), where Florida as a whole comes to 2.6.

From Wauchula to Zolfo Springs, CDC publishes no figure by town: each reads Hardee County's.

The cities and towns in Hardee County by residents, July 1, 2025
PlaceResidentsSince 2020Share of residents
Wauchula4,946+1.2%19.1%
Bowling Green2,448+2.3%9.4%
Zolfo Springs1,754+1.4%6.8%

3 incorporated places, as listed in the U.S. Census Bureau’s 2020 place reference files. Residents: U.S. Census Bureau population estimates for July 1, 2025 (Vintage 2025).

Hardee County, Homes

Homes in Hardee County

Of Hardee County's 9,884 homes, 60% are detached houses, against 55% across Florida; 28% are mobile homes. Half of its homes were built before 1985, close to Florida's 1988: 13% date from before 1960 and 25% from 2000 or later. 71% of occupied homes are lived in by their owner (Florida: 67%); in the rest a tenant can run a test, but a fix is the landlord's to make.

Homes in Hardee County, Florida, 2019 to 2023
HomesHardee CountyFlorida
Housing units9,88410,082,356
Detached houses60%55%
In buildings of 5 or more8%25%
Mobile homes28%8%
Built before 196013%10%
Built since 200025%30%
Middle year built19851988
Owner-occupied71%67%

Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.