Short-term kit
RA400 short-term liquid scintillation radon test kit, lab fee included
- Lab fee included
Method: Liquid scintillation
In home: 48 to 96 hours
Locations and reports
Radon Levels in Hendry County, Florida
EPA puts Hendry County in Zone 3, its lowest radon zone, and only 3 radon tests from it are on file with CDC (2023). Homes with elevated levels occur in all three zones, so only a test measures yours.
Data checked By Radon411Methodology
Share at 4+ pCi/L
0.0%
15.4 pts below FL
- Hendry
- 0.0%
- Florida
- 15.4%
71 tests, 2021
Median result
0.2pCi/L
Below action level
- Hendry
- 0.2 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2021
Tests reported
71
24th of 30 by tests
- Hendry
- 71
- Collier
- 4,155
Reported to CDC before any fix, 2021
EPA radon zone
Zone 3
Lower potential
- 1
- 2
- Zone 3
1 highest, 3 lowest
EPA predicts under 2 pCi/L indoors
Rank in Florida
20 of 30
Middle half
- Hendry
- 0.0%
- Charlotte
- 40.0%
By share, of 30 with 30+ tests
Read a result for Hendry County
Starts at Hendry County's median, 0.2 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 0.2 pCi/L
Below 2 pCi/L
- Under 20 to 1.9 pCi/L
- 2 to 4consider a fix
- 4 and aboveEPA says fix it
This result is below 2 pCi/L, the level at which EPA says a fix should be considered. Hendry County's median reported result, 2021.
The data
Hendry County, At a glance
Hendry County at a glance
Predicted: EPA radon zone
EPA Zone 3: lower predicted potential
USGS geologic potential: Low across 100% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Hendry County, 2023
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2014 | 0.0% |
| 2016 | 0.0% |
| 2017 | 0.0% |
| 2018 | 50.0% |
| 2021 | 0.0% |
| 2022 | 0.0% |
| 2023 | 0.0% |
2023: 0.0%. Across these years the share ran from 0.0% to 50.0%. Each column counts radon tests reported to CDC that year, not homes.
What these figures count
Only 3 tests were reported to CDC for Hendry County over 2023, and tests are often run on homes being sold or already suspected of a problem: so few describe neither the county nor this house.
Measured: CDC tracking data. Figure above: 2023. Measured data period: 2005 to 2023 (every CDC figure on file).
Hendry County, Compared
Hendry County radon figures, compared
Calculated by Radon411Only 0 of 71 radon tests reported for Hendry County in 2021 reached 4 pCi/L (0.0%). The median result, 0.2 pCi/L, sits below 2, well under EPA's 4 pCi/L action level, and the top reported result was 3.3 pCi/L.
The newest figure, in 2023, counts only 3 tests (0.0% at or above 4 pCi/L), too few to compare, so this reading uses the 71-test figure.
Across 55 Florida counties pooled together, 15.4% of tests reached that level, so Hendry County runs 15.4 points below its state. Against the national pool of 24.4%, the gap is 24.4 points lower. Its place in the state: 20th of 30 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 6 neighbours with a figure, all 6 reported a larger share at or above 4 pCi/L; the spread is 0.0% (Martin County) to 40.0% (Charlotte County).
Below the action level, 70 tests (98.6%) came in under 2 pCi/L, against 60.0% statewide, and 1 tests (1.4%) fell between 2 and 4, against 24.6% statewide. USGS geology rates 100% of the county's land low radon potential.
The busiest year on file was 2021, with 71 tests reported; the quietest, 2016, had 1.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Hendry County, Geology
The ground under Hendry County
PredictedUSGS's geologic map puts all of Hendry County's mapped land in one class: low radon potential. All 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).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Gulf/Atlantic Lowland and Central Highland | sand, silt, clay, gravel | Low | 6 | 100% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Hendry County beside the ground around it
Across Florida 7.1% of the land is rated moderate; none of Hendry County's is. None of the 8 counties that border it has any moderate-potential ground either.
The map rates the ground, not the air in any home.
Local help
Hendry County, Local resources
Radon testing and mitigation in Hendry County
- Florida’s Radon ProgramFlorida’s Radon Program, run by Florida Department of Health, licenses or certifies radon professionals and offers free or discounted test kits, and answers questions about testing and mitigation in Florida.Visit the program’s page(opens in a new tab)
- Free and low-cost kitsThe program says:
Protect your family by requesting a FREE radon test kit.
- Compare kits
- Professionals in Florida77 professionals are listed in Florida.
What Florida's program says
- Phone
- 850-245-4288
- 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
Hendry County, Questions
Questions about radon in Hendry County
Are radon levels high in Hendry County?
In 2023, 0.0% of the radon tests reported to CDC for Hendry County, Florida were at or above 4 pCi/L, and the median reported pre-mitigation result was 1.3 pCi/L. Of 30 Florida counties with 30 or more tests for the same period, 19 reported a higher share; pooled, the state comes to 15.4%.
Which counties border Hendry County?
Hendry County borders 8 counties: Glades County, Collier County, Lee County, Charlotte County, Palm Beach County, Okeechobee County, Broward County and Martin County.
Products
Hendry County, Products
Testing a home in Hendry County
In Hendry County, 0.0% of 71 tests reported to CDC in 2021 reached 4 pCi/L, against 15.4% 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 Hendry County.
Test kits and monitors3
See every kit and monitor
Long-term kit
RL416 long-term radon test kit, lab fee included
- Lab fee included
Method: Alpha track
In home: 90 days to 12 months
Monitor
Wave Radon battery smart radon monitor
- C-NRPP 2024/25: Not included
- Battery
- Bluetooth
- App only
Method: Alpha spectrometry
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Hendry County, Bordering counties
Counties bordering Hendry County
Calculated by Radon411- Radon levels in Charlotte CountyEPA zone 3
40.0%at or above 4 pCi/L
Median 3.2 pCi/L · 100 tests · 40.0 points above Hendry County
- Radon levels in Collier CountyEPA zone 3
22.7%at or above 4 pCi/L
Median 2.3 pCi/L · 4,155 tests · 22.7 points above Hendry County
- Radon levels in Broward CountyEPA zone 3
21.5%at or above 4 pCi/L
Median 1.7 pCi/L · 980 tests · 21.5 points above Hendry County
- Radon levels in Lee CountyEPA zone 3
20.2%at or above 4 pCi/L
Median 2.1 pCi/L · 1,951 tests · 20.2 points above Hendry County
- Radon levels in Palm Beach CountyEPA zone 3
19.0%at or above 4 pCi/L
Median 1.3 pCi/L · 935 tests · 19.0 points above Hendry County
- Radon levels in Martin CountyEPA zone 3
0.0%at or above 4 pCi/L
Median 1.3 pCi/L · 89 tests · 0.0 points above Hendry County
- Radon levels in Glades CountyEPA zone 3
No CDC figure for 2021; its page reads it against its own neighbours.
- Radon levels in Okeechobee CountyEPA zone 3
No CDC figure for 2021; its page reads it against its own neighbours.
Hendry County, Cities and towns
Cities and towns in Hendry County
Hendry County is growing: the Census Bureau puts it at 48,276 residents on July 1, 2025, up 21.5% from 39,726 in 2020. That works out to 42 people per square mile of land. No town dominates: Clewiston, the largest, has 7,594 residents, 15.7% of the total. Together its 2 incorporated places hold 27.6% of those residents; the other 72.4% live outside any of them. Testing is reported here more often than across the state: CDC's 71 reported tests for 2021 come to 1.5 for every 1,000 residents (2025 estimate), against 0.7 for Florida.
From Clewiston to LaBelle, CDC publishes no figure by town: each reads Hendry County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Clewiston | 7,594 | +3.8% | 15.7% |
| LaBelle | 5,754 | +17.0% | 11.9% |
2 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).
Hendry County, Homes
Homes in Hendry County
Mobile homes are 36% of Hendry County's 15,639 homes and detached houses 55%, against 55% across Florida. Half of its homes were built before 1990, close to Florida's 1988: 7% date from before 1960 and 29% from 2000 or later. 72% 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 | Hendry County | Florida |
|---|---|---|
| Housing units | 15,639 | 10,082,356 |
| Detached houses | 55% | 55% |
| In buildings of 5 or more | 2% | 25% |
| Mobile homes | 36% | 8% |
| Built before 1960 | 7% | 10% |
| Built since 2000 | 29% | 30% |
| Middle year built | 1990 | 1988 |
| Owner-occupied | 72% | 67% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.