Short-term kitempowerDX
Standard Radon Test short-term mail-in radon test kit
- Lab fee included
Method: Passive sampler
In home: 48 to 96 hours
Locations and reports
Radon Levels in Lee County, Florida
EPA puts Lee County in Zone 3, its lowest radon zone, and 20.3% of its 1,224 reported radon tests (2023) were 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
Share at 4+ pCi/L
20.3%
1.8 pts above FL
- Lee
- 20.3%
- Florida
- 18.5%
1,224 tests, 2023
Median result
2.2pCi/L
Below action level
- Lee
- 2.2 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2023
Tests reported
1,224
5th of 30 by tests
- Lee
- 1,224
- Broward
- 2,165
Reported to CDC before any fix, 2023
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
7 of 30
Top quarter
- Lee
- 20.3%
- Marion
- 44.5%
By share, of 30 with 30+ tests
Read a result for Lee County
Starts at Lee County's median, 2.2 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 2.2 pCi/L
Between 2 and 4 pCi/L
- Under 20 to 1.9 pCi/L
- 2 to 4consider a fix
- 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. Lee County's median reported result, 2023.
The data
Lee County, At a glance
Lee County at a glance
Predicted: EPA radon zone
EPA Zone 3: lower predicted potential
USGS geologic potential: Low across 84% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Lee County, 2023
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2014 | 34.5% |
| 2015 | 31.2% |
| 2016 | 31.8% |
| 2017 | 26.6% |
| 2018 | 26.1% |
| 2019 | 32.5% |
| 2020 | 28.8% |
| 2021 | 20.2% |
| 2022 | 22.9% |
| 2023 | 20.3% |
2023: 20.3%. Across these years the share ran from 20.2% to 34.5%. Each column counts radon tests reported to CDC that year, not homes.
What these figures count
These are the 1,224 tests reported to CDC for Lee 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).
Lee County, Compared
Lee County radon figures, compared
Calculated by Radon411Lee County's 1,224 reported tests in 2023 had a middle value of 2.2 pCi/L and a maximum of 37.6 pCi/L, and 20.3% reached 4 pCi/L. Florida as a whole (49 Florida counties, pooled) comes to 18.5%: 1.8 points lower than here.
Among its state's counties it ranks 7th of 30 Florida counties with 30 or more tests for the same period. Statewide for the same period, Marion County reported the highest share (44.5%) and Clay County the lowest (0.0%).
Below the action level, 541 tests (44.2%) came in under 2 pCi/L, against 57.3% statewide, and 434 tests (35.5%) fell between 2 and 4, against 24.2% statewide. The busiest year on file was 2022, with 5,196 tests reported; the quietest, 2023, had 1,224.
EPA's 1993 zone map puts Lee County in Zone 3, a predicted county average under 2 pCi/L. USGS geology rates 84% of the county's land low radon potential.
Next door, the shares run from 22.7% in Collier County to 31.9% in Charlotte County. Over 10 years of annual figures the share fell 14.2 points, from 34.5% in 2014 to 20.3% in 2023; its peak was 34.5% in 2014.
CDC also counts 149 tests taken after mitigation in Lee County for the same period: tests in homes where a fix was already in.
Lee CountyFlorida, pooled
| Year | Tests | Lee County, at or above 4 pCi/L | Florida, pooled |
|---|---|---|---|
| 2014 | 1,730 | 34.5% | 25.7% |
| 2015 | 1,831 | 31.2% | 26.5% |
| 2016 | 1,481 | 31.8% | 24.3% |
| 2017 | 1,528 | 26.6% | 21.7% |
| 2018 | 1,254 | 26.1% | 23.5% |
| 2019 | 1,761 | 32.5% | 29.6% |
| 2020 | 1,755 | 28.8% | 23.2% |
| 2021 | 1,951 | 20.2% | 15.4% |
| 2022 | 5,196 | 22.9% | 22.8% |
| 2023 | 1,224 | 20.3% | 18.5% |
Pooled shares: Radon411's sum of CDC's county counts for one period.
Lee County, Geology
The ground under Lee County
PredictedUSGS's geologic map puts all of Lee County's mapped land in one class: low radon potential. 83.7% 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 | 83.7% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Lee County beside the ground around it
Across Florida 7.1% of the land is rated moderate; none of Lee County's is. None of the 4 counties that border it has any moderate-potential ground either.
The map rates the ground, not the air in any home.
Local help
Lee County, Local resources
Radon testing and mitigation in Lee County
Listed radon businesses with an address in Lee 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.
Listed radon professionals by town: Fort Myers, Bonita Springs
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
Lee County, Questions
Questions about radon in Lee County
Are radon levels high in Lee County?
In 2023, 20.3% of the radon tests reported to CDC for Lee County, Florida were at or above 4 pCi/L, and the median reported pre-mitigation result was 2.2 pCi/L. Of 30 Florida counties with 30 or more tests for the same period, 6 reported a higher share; pooled, the state comes to 18.5%.
Which counties border Lee County?
Lee County borders 4 counties: Charlotte County, Hendry County, Collier County and Glades County.
Products
Lee County, Products
Testing a home in Lee County
In Lee County, 20.3% of 1,224 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 Lee 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
MonitorAEGTEST
HOUND-1011 rechargeable radon detector with a screen
- C-NRPP 2024/25: Not included
- Battery
- Alarm
- Screen
Method: Semiconductor sensor
First reading: Within 6 hours
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Lee County, Bordering counties
Counties bordering Lee County
Calculated by Radon411- Radon levels in Charlotte CountyEPA zone 3
31.9%at or above 4 pCi/L
Median 2.9 pCi/L · 91 tests · 11.6 points above Lee County
- Radon levels in Collier CountyEPA zone 3
22.7%at or above 4 pCi/L
Median 2.3 pCi/L · 1,607 tests · 2.4 points above Lee County
- Radon levels in Hendry CountyEPA zone 3
0.0%at or above 4 pCi/L
Median 1.3 pCi/L · 3 tests · 20.3 points below Lee County
- Radon levels in Glades CountyEPA zone 3
No CDC figure for 2023; its page reads it against its own neighbours.
Lee County, Cities and towns
Cities and towns in Lee County
Lee County is growing: the Census Bureau puts it at 875,607 residents on July 1, 2025, up 14.4% from 765,575 in 2020. Packed into its land, that is 1,121 people per square mile. Its largest town, Cape Coral, has 236,264 residents, 27.0% of the total. Together its 6 incorporated places hold 50.9% of those residents; the other 49.1% live outside any of them. Testing is reported here more often than across the state: CDC's 1,224 reported tests for 2023 come to 1.4 for every 1,000 residents (2025 estimate), against 0.7 for Florida.
From Cape Coral to Fort Myers Beach, CDC publishes no figure by town: each reads Lee County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Cape Coral | 236,264 | +20.9% | 27.0% |
| Fort Myers | 101,581 | +16.4% | 11.6% |
| Bonita Springs | 57,634 | +6.9% | 6.6% |
| Estero | 38,365 | +3.6% | 4.4% |
| Sanibel | 6,303 | −1.3% | 0.7% |
| Fort Myers Beach | 5,287 | −5.3% | 0.6% |
Places in Lee County with a city page: 1 of 1
6 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).
Lee County, Homes
Homes in Lee County
Fewer than six in ten of Lee County's 430,243 homes are detached houses (55%, against 55% across Florida); the rest are attached, in shared buildings or mobile. Half of its homes were built before 1995, close to Florida's 1988: 3% date from before 1960 and 43% from 2000 or later. 74% 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 | Lee County | Florida |
|---|---|---|
| Housing units | 430,243 | 10,082,356 |
| Detached houses | 55% | 55% |
| In buildings of 5 or more | 22% | 25% |
| Mobile homes | 9% | 8% |
| Built before 1960 | 3% | 10% |
| Built since 2000 | 43% | 30% |
| Middle year built | 1995 | 1988 |
| Owner-occupied | 74% | 67% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.