Short-term kit
PicoCan short-term charcoal canister radon test
- Lab fee included
Method: Charcoal
In home: 48 to 96 hours
Locations and reports
Radon Levels in Charlotte County, Florida
EPA puts Charlotte County in Zone 3, its lowest radon zone, and 31.9% of its 91 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
31.9%
13.4 pts above FL
- Charlotte
- 31.9%
- Florida
- 18.5%
91 tests, 2023
Median result
2.9pCi/L
Below action level
- Charlotte
- 2.9 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2023
Tests reported
91
24th of 30 by tests
- Charlotte
- 91
- 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
4 of 30
Top quarter
- Charlotte
- 31.9%
- Marion
- 44.5%
By share, of 30 with 30+ tests
Read a result for Charlotte County
Starts at Charlotte County's median, 2.9 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 2.9 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. Charlotte County's median reported result, 2023.
The data
Charlotte County, At a glance
Charlotte County at a glance
Predicted: EPA radon zone
EPA Zone 3: lower predicted potential
USGS geologic potential: Low across 93% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Charlotte County, 2023
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2014 | 33.3% |
| 2015 | 30.0% |
| 2016 | 15.4% |
| 2017 | 25.7% |
| 2018 | 18.2% |
| 2019 | 29.4% |
| 2020 | 19.6% |
| 2021 | 40.0% |
| 2022 | 27.3% |
| 2023 | 31.9% |
2023: 31.9%. Across these years the share ran from 15.4% to 40.0%. Each column counts radon tests reported to CDC that year, not homes.
What these figures count
These are the 91 tests reported to CDC for Charlotte 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).
Charlotte County, Compared
Charlotte County radon figures, compared
Calculated by Radon411In Charlotte County, about 3 in 10 reported tests in 2023 (29 of 91) were at or above EPA's action level. Against the national pool of 33.4%, the gap is 1.5 points lower. Across 49 Florida counties pooled together, 18.5% of tests reached that level, so Charlotte County runs 13.4 points above its state.
Of 2 neighbours with a figure, none reported a larger share at or above 4 pCi/L; the spread is 12.3% (Sarasota County) to 20.3% (Lee County). By share, Charlotte County is 4th of 30 Florida counties with 30 or more tests for the same period.
Year by year, 2016 opened at 15.4% and 2023 closed at 31.9% (up 16.5 points), with 2021 the high at 40.0%. Half the tests came in under 2.9 pCi/L and half over it; the single highest reached 27.4 pCi/L. Below the action level, 28 tests (30.8%) came in under 2 pCi/L, against 57.3% statewide, and 34 tests (37.4%) fell between 2 and 4, against 24.2% statewide.
The reported tests do not follow EPA's Zone 3 label for Charlotte County (predicted average under 2 pCi/L): 31.9% of them reached 4 pCi/L, more than a low-potential zone suggests. USGS geology rates 93% of the county's land low radon potential. CDC also counts 16 tests taken after mitigation in Charlotte County for the same period: tests in homes where a fix was already in.
The busiest year on file was 2017, with 245 tests reported; the quietest, 2015, had 10.
Charlotte CountyFlorida, pooled
31.9% % of tests18.5% % of tests
| Year | Tests | Charlotte County, at or above 4 pCi/L | Florida, pooled |
|---|---|---|---|
| 2016 | 65 | 15.4% | 24.3% |
| 2017 | 245 | 25.7% | 21.7% |
| 2018 | 33 | 18.2% | 23.5% |
| 2020 | 46 | 19.6% | 23.2% |
| 2021 | 100 | 40.0% | 15.4% |
| 2022 | 66 | 27.3% | 22.8% |
| 2023 | 91 | 31.9% | 18.5% |
Pooled shares: Radon411's sum of CDC's county counts for one period.
Charlotte County, Geology
The ground under Charlotte County
PredictedUSGS's geologic map puts all of Charlotte County's mapped land in one class: low radon potential. 93.5% 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 | 93.5% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Charlotte County beside the ground around it
Across Florida 7.1% of the land is rated moderate; none of Charlotte County's is. None of the 6 counties that border it has any moderate-potential ground either.
The map rates the ground, not the air in any home.
Local help
Charlotte County, Local resources
Radon testing and mitigation in Charlotte 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
Charlotte County, Questions
Questions about radon in Charlotte County
Are radon levels high in Charlotte County?
In 2023, 31.9% of the radon tests reported to CDC for Charlotte County, Florida were at or above 4 pCi/L, and the median reported pre-mitigation result was 2.9 pCi/L. Of 30 Florida counties with 30 or more tests for the same period, 3 reported a higher share; pooled, the state comes to 18.5%.
Which counties border Charlotte County?
Charlotte County borders 6 counties: DeSoto County, Lee County, Sarasota County, Glades County, Hendry County and Highlands County.
Products
Charlotte County, Products
Testing a home in Charlotte County
In Charlotte County, 31.9% of 91 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 Charlotte 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
MonitorX-Sense
XR0A-SR battery digital radon detector with a screen
- C-NRPP 2024/25: Not included
- Battery
- Screen
Method: Alpha spectrometry
First reading: Within 24 hours
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Charlotte County, Bordering counties
Counties bordering Charlotte County
Calculated by Radon411- Radon levels in Lee CountyEPA zone 3
20.3%at or above 4 pCi/L
Median 2.2 pCi/L · 1,224 tests · 11.6 points below Charlotte County
- Radon levels in Sarasota CountyEPA zone 3
12.3%at or above 4 pCi/L
Median 1.6 pCi/L · 496 tests · 19.6 points below Charlotte County
- Radon levels in DeSoto CountyEPA zone 3
0.0%at or above 4 pCi/L
Median 1.7 pCi/L · 1 test · 31.9 points below Charlotte County
- Radon levels in Hendry CountyEPA zone 3
0.0%at or above 4 pCi/L
Median 1.3 pCi/L · 3 tests · 31.9 points below Charlotte County
- Radon levels in Glades CountyEPA zone 3
No CDC figure for 2023; its page reads it against its own neighbours.
- Radon levels in Highlands CountyEPA zone 3
No CDC figure for 2023; its page reads it against its own neighbours.
Charlotte County, Cities and towns
Cities and towns in Charlotte County
Charlotte County is growing: the Census Bureau puts it at 217,212 residents on July 1, 2025, up 15.5% from 188,023 in 2020. That works out to 319 people per square mile of land. Punta Gorda, its one incorporated place, has 20,383 residents, 9.4% of the total. Reported testing is thin here: 91 tests over 2023, or 0.4 for every 1,000 residents (2025 estimate), where Florida as a whole comes to 0.7.
Punta Gorda is the one incorporated place here; CDC publishes no figure by town, so it reads Charlotte County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Punta Gorda | 20,383 | +3.7% | 9.4% |
One incorporated place, 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).
Charlotte County, Homes
Homes in Charlotte County
Of Charlotte County's 114,821 homes, 68% are detached houses, against 55% across Florida; 13% are in buildings of five or more homes. Half of its homes were built before 1990, close to Florida's 1988: 3% date from before 1960 and 33% from 2000 or later. Owners live in 83% of the occupied homes (Florida: 67%), so for most households a test and a fix are their own to order.
| Homes | Charlotte County | Florida |
|---|---|---|
| Housing units | 114,821 | 10,082,356 |
| Detached houses | 68% | 55% |
| In buildings of 5 or more | 13% | 25% |
| Mobile homes | 11% | 8% |
| Built before 1960 | 3% | 10% |
| Built since 2000 | 33% | 30% |
| Middle year built | 1990 | 1988 |
| Owner-occupied | 83% | 67% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.