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Radon Levels in Palm Beach County, Florida

EPA puts Palm Beach County in Zone 3, its lowest radon zone, and high results are common there: 40.1% of the 1,526 radon tests reported to CDC (2023) came back at or above 4 pCi/L. 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

    40.1%

    21.6 pts above FL

    Palm Beach
    40.1%
    Florida
    18.5%

    1,526 tests, 2023

  • Median result

    3.0pCi/L

    Below action level

    Palm Beach
    3.0 pCi/L
    EPA
    4.0 pCi/L

    Midpoint of the tests, 2023

  • Tests reported

    1,526

    4th of 30 by tests

    Palm Beach
    1,526
    Broward
    2,165

    Reported to CDC before any fix, 2023

  • 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

    2 of 30

    Top quarter

    Palm Beach
    40.1%
    Marion
    44.5%

    By share, of 30 with 30+ tests

Read a result for Palm Beach County

Starts at Palm Beach County's median, 3.0 pCi/L

3.0pCi/L

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

EPA’s reading of 3.0 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. Palm Beach County's median reported result, 2023.

Interpret this readingWhat a fix costs

The data

Palm Beach County, At a glance

Palm Beach County at a glance

Predicted: EPA radon zone

EPA Zone 3: lower predicted potential

is EPA's lowest class, and its forecast for Palm Beach 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 99% of the county's area

Predicted: EPA Map of Radon Zones

Measured: tests reported to CDC

Radon tests reported for Palm Beach County, 2023

Share of reported tests at or above 4 pCi/L, by year, Palm Beach County
Share of reported tests at or above 4 pCi/L, by year, Palm Beach County
YearShare of reported tests at or above 4 pCi/L
201425.6%
201520.6%
201625.4%
201740.4%
201833.3%
201942.7%
202028.6%
202119.0%
202254.7%
202340.1%

2023: 40.1%. Across these years the share ran from 19.0% to 54.7%. Each column counts radon tests reported to CDC that year, not homes.

What these figures count

These are the 1,526 tests reported to CDC for Palm Beach County over 2023, 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: 2023. Measured data period: 2005 to 2023 (every CDC figure on file).

How to read these figures

Palm Beach County, Compared

Palm Beach County radon figures, compared

Calculated by Radon411

In Palm Beach County, about 4 in 10 reported tests in 2023 (612 of 1,526) were at or above EPA's action level. Against the national pool of 33.4%, the gap is 6.7 points higher. Across 49 Florida counties pooled together, 18.5% of tests reached that level, so Palm Beach County runs 21.6 points above its state.

Broward County, the one bordering county with a figure for the same period, reported 9.4%. By share, Palm Beach County is 2nd of 30 Florida counties with 30 or more tests for the same period.

Year by year, 2014 opened at 25.6% and 2023 closed at 40.1% (up 14.5 points), with 2022 the high at 54.7%. Half the tests came in under 3.0 pCi/L and half over it; the single highest reached 21.0 pCi/L. Below the action level, 524 tests (34.3%) came in under 2 pCi/L, against 57.3% statewide, and 390 tests (25.6%) fell between 2 and 4, against 24.2% statewide.

The reported tests do not follow EPA's Zone 3 label for Palm Beach County (predicted average under 2 pCi/L): 40.1% of them reached 4 pCi/L, more than a low-potential zone suggests. USGS geology rates 99% of the county's land low radon potential. CDC also counts 347 tests taken after mitigation in Palm Beach County for the same period: tests in homes where a fix was already in.

The busiest year on file was 2022, with 5,412 tests reported; the quietest, 2015, had 373.

Share of reported tests at or above 4 pCi/L by year, Palm Beach County against Florida2014 to 2023, years with 30 or more tests: Palm Beach County 25.6% to 40.1%, the state's pooled share 18.5% in 2023.
Palm Beach CountyFlorida, pooled
Share of reported tests at or above 4 pCi/L by year, Palm Beach County against Florida: data table
YearTestsPalm Beach County, at or above 4 pCi/LFlorida, pooled
201464025.6%25.7%
201537320.6%26.5%
201668225.4%24.3%
20171,20440.4%21.7%
201886533.3%23.5%
20191,10742.7%29.6%
202053128.6%23.2%
202193519.0%15.4%
20225,41254.7%22.8%
20231,52640.1%18.5%
Palm Beach County against Florida, the United States and nearby counties, 2023
AreaTestsAt or above 4 pCi/LMedianDifference from Palm Beach County
Palm Beach County1,52640.1%3.0 pCi/LThis county
Florida, pooled49 counties, pooled16,58918.5%Not pooled−21.6 points
United States, pooled642 counties, pooled128,74033.4%Not pooled−6.7 points
Marion Countyhighest in the state18244.5%3.6 pCi/L+4.4 points
Clay Countylowest in the state360.0%1.0 pCi/L−40.1 points
Martin County, FLborders it2924.1%1.9 pCi/L−16.0 points
Broward County, FLborders it2,1659.4%1.7 pCi/L−30.7 points
Hendry County, FLborders it30.0%1.3 pCi/L−40.1 points
Where Palm Beach County's reported results fell, 2023, beside Florida and the United States
ResultPalm Beach County testsPalm Beach County shareFlorida shareU.S. shareAgainst Florida
Under 2 pCi/L52434.3%57.3%41.4%−23.0 points
2 to 4 pCi/L39025.6%24.2%25.2%+1.4 points
4 pCi/L and above61240.1%18.5%33.4%+21.6 points
Palm Beach County ranked among the 30 Florida counties with 30 or more tests, by share at or above 4 pCi/L, 2023
CountyRankTestsAt or above 4 pCi/LMedian
Marion County1 of 3018244.5%3.6 pCi/L
Palm Beach County2 of 301,52640.1%3.0 pCi/L
Miami-Dade County3 of 301,91939.6%2.8 pCi/L
Charlotte County4 of 309131.9%2.9 pCi/L
Collier County5 of 301,60722.7%2.3 pCi/L
Alachua County6 of 3065921.4%2.4 pCi/L
Lee County7 of 301,22420.3%2.2 pCi/L
Leon County8 of 301,19619.1%1.8 pCi/L
Gadsden County9 of 309614.6%1.3 pCi/L
Sarasota County10 of 3049612.3%1.6 pCi/L
Polk County11 of 3013611.0%1.1 pCi/L
Palm Beach County radon tests by year, against Florida's pooled share
YearTestsAt or above 4 pCi/LMedianHighestFlorida, pooledChange from the row before
20231,52640.1%3.0 pCi/L21.0 pCi/L18.5%−14.6 points
20225,41254.7%4.5 pCi/L27.5 pCi/L22.8%+35.7 points
202193519.0%1.3 pCi/L21.6 pCi/L15.4%−9.6 points
202053128.6%1.8 pCi/L23.9 pCi/L23.2%−14.1 points
20191,10742.7%3.2 pCi/L19.7 pCi/L29.6%+9.4 points
201886533.3%3.0 pCi/L26.3 pCi/L23.5%−7.1 points
20171,20440.4%3.4 pCi/L160.0 pCi/L21.7%+15.0 points
201668225.4%1.8 pCi/L23.3 pCi/L24.3%+4.8 points
201537320.6%1.5 pCi/L17.7 pCi/L26.5%−5.0 points
201464025.6%2.3 pCi/L71.0 pCi/L25.7%First on file

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

Palm Beach County, Geology

The ground under Palm Beach County

Predicted

USGS's geologic map puts all of Palm Beach County's mapped land in one class: low radon potential. 99.1% of it lies in the area the map calls Gulf/Atlantic Lowland and Central Highland, to which USGS gives a radon index of 6, in the low band (5 to 8).

USGS's geologic areas under Palm Beach County
AreaThe rock, in USGS's wordsPotentialRadon indexShare of land
Gulf/Atlantic Lowland and Central Highlandsand, silt, clay, gravelLow699.1%

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

Palm Beach County beside the ground around it

Across Florida 7.1% of the land is rated moderate; none of Palm Beach County's is. None of the 5 counties that border it has any moderate-potential ground either.

Share of land by USGS radon potential: Palm Beach County, the 5 counties bordering it and Florida
AreaEPA zoneLow potentialModerate potentialHigh potential
Palm Beach CountyZone 399.1%NoneNone
Martin CountyZone 397.0%NoneNone
Broward CountyZone 399.9%NoneNone
Hendry CountyZone 3100%NoneNone
Okeechobee CountyZone 3100%NoneNone
Glades CountyZone 3100%NoneNone
Florida67 counties, pooled by land areaVaries89.7%7.1%None

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

Local help

Palm Beach County, Local resources

Radon testing and mitigation in Palm Beach County

Listed radon businesses with an address in Palm Beach County:

Listed radon professionals by town: Boca Raton

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

Palm Beach County, Questions

Questions about radon in Palm Beach County

Are radon levels high in Palm Beach County?

In 2023, 40.1% of the radon tests reported to CDC for Palm Beach County, Florida were at or above 4 pCi/L, and the median reported pre-mitigation result was 3.0 pCi/L. Of 30 Florida counties with 30 or more tests for the same period, 1 reported a higher share; pooled, the state comes to 18.5%.

Which counties border Palm Beach County?

Palm Beach County borders 5 counties: Martin County, Broward County, Hendry County, Okeechobee County and Glades County.

Products

Palm Beach County, Products

Testing a home in Palm Beach County

In Palm Beach County, 40.1% of 1,526 tests reported to CDC in 2023 reached 4 pCi/L, against 18.5% 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 Palm Beach County.

Test kits and monitors3

See every kit and monitor

Best radon monitors for Palm Beach County homes, compared

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Palm Beach County, Bordering counties

Counties bordering Palm Beach County

Calculated by Radon411

Palm Beach County, Cities and towns

Cities and towns in Palm Beach County

Palm Beach County is growing: the Census Bureau puts it at 1,575,726 residents on July 1, 2025, up 5.5% from 1,494,203 in 2020. That works out to 802 people per square mile of land. No town dominates: West Palm Beach, the largest, has 127,189 residents, 8.1% of the total. Together its 39 incorporated places hold 56.5% of those residents; the other 43.5% live outside any of them. CDC's 1,526 reported tests for 2023 work out to 1.0 per 1,000 residents (2025 estimate), close to Florida's 0.7.

From West Palm Beach to Cloud Lake, CDC publishes no figure by town: each reads Palm Beach County's.

The 12 largest cities and towns in Palm Beach County by residents, July 1, 2025
PlaceResidentsSince 2020Share of residents
West Palm Beach127,189+8.3%8.1%
Boca Raton101,582+3.4%6.4%
Boynton Beach82,396+2.4%5.2%
Delray Beach69,809+4.5%4.4%
Palm Beach Gardens63,883+7.8%4.1%
Wellington62,662+1.8%4.0%
Jupiter62,350+1.9%4.0%
Greenacres44,736+1.7%2.8%
Lake Worth Beach43,970+4.1%2.8%
Royal Palm Beach42,477+7.5%2.7%
Riviera Beach39,357+4.6%2.5%
Palm Springs28,303+5.2%1.8%
  • Belle Glade
  • North Palm Beach
  • Lantana
  • Palm Beach
  • Lake Park
  • Westlake
  • Tequesta
  • Pahokee
  • South Bay
  • Highland Beach
  • Juno Beach
  • Lake Clarke Shores
  • Loxahatchee Groves
  • Hypoluxo
  • Mangonia Park
  • Haverhill
  • Atlantis
  • Ocean Ridge
  • South Palm Beach
  • Palm Beach Shores
  • Gulf Stream
  • Briny Breezes
  • Jupiter Inlet Colony
  • Manalapan
The other 3 places in Palm Beach County
  • Golf
  • Glen Ridge
  • Cloud Lake

39 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).

Palm Beach County, Homes

Homes in Palm Beach County

Palm Beach County has 713,855 homes, and many share a building: 31% are in buildings of five or more, 46% are detached houses, against 55% across Florida. Half of its homes were built before 1986, close to Florida's 1988: 8% date from before 1960 and 24% from 2000 or later. 70% 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 Palm Beach County, Florida, 2019 to 2023
HomesPalm Beach CountyFlorida
Housing units713,85510,082,356
Detached houses46%55%
In buildings of 5 or more31%25%
Mobile homes3%8%
Built before 19608%10%
Built since 200024%30%
Middle year built19861988
Owner-occupied70%67%

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