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 Sarasota County, Florida
EPA puts Sarasota County in Zone 3, its lowest radon zone, and most reported tests there come back low, though 12.3% of 496 (2023) reached 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
12.3%
6.2 pts below FL
- Sarasota
- 12.3%
- Florida
- 18.5%
496 tests, 2023
Median result
1.6pCi/L
Below action level
- Sarasota
- 1.6 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2023
Tests reported
496
12th of 30 by tests
- Sarasota
- 496
- 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
10 of 30
Middle half
- Sarasota
- 12.3%
- Marion
- 44.5%
By share, of 30 with 30+ tests
Read a result for Sarasota County
Starts at Sarasota County's median, 1.6 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 1.6 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. Sarasota County's median reported result, 2023.
The data
Sarasota County, At a glance
Sarasota County at a glance
Predicted: EPA radon zone
EPA Zone 3: lower predicted potential
USGS geologic potential: Low across 95% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Sarasota County, 2023
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2014 | 21.7% |
| 2015 | 32.5% |
| 2016 | 14.7% |
| 2017 | 25.3% |
| 2018 | 18.3% |
| 2019 | 17.2% |
| 2020 | 11.2% |
| 2021 | 5.2% |
| 2022 | 19.5% |
| 2023 | 12.3% |
2023: 12.3%. Across these years the share ran from 5.2% to 32.5%. Each column counts radon tests reported to CDC that year, not homes.
What these figures count
These are the 496 tests reported to CDC for Sarasota 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).
Sarasota County, Compared
Sarasota County radon figures, compared
Calculated by Radon411Sarasota County reports fewer high tests than Florida overall. 12.3% of its 496 tests in 2023 were at or above 4 pCi/L. That is 6.2 points below the 18.5% pooled from 49 Florida counties.
Ordered from highest share down, it comes 10th of 30 Florida counties with 30 or more tests for the same period. Nationally, every county with a figure for the same period pools to 33.4%; Sarasota County sits 21.1 points below it.
Next door, the shares run from 11.0% in Manatee County to 31.9% in Charlotte County, with Manatee County below Sarasota County. Zone 3 on EPA's map (predicted average under 2 pCi/L) and a 12.3% share point the same way here.
Half the tests came in under 1.6 pCi/L and half over it; the single highest reached 15.1 pCi/L. The rest split 57.9% under 2 pCi/L and 29.8% from 2 to 4 (Florida: 57.3% and 24.2%). Year by year, 2014 opened at 21.7% and 2023 closed at 12.3% (down 9.4 points), with 2015 the high at 32.5%.
The busiest year on file was 2022, with 816 tests reported; the quietest, 2016, had 95.
Sarasota CountyFlorida, pooled
| Year | Tests | Sarasota County, at or above 4 pCi/L | Florida, pooled |
|---|---|---|---|
| 2014 | 106 | 21.7% | 25.7% |
| 2015 | 154 | 32.5% | 26.5% |
| 2016 | 95 | 14.7% | 24.3% |
| 2017 | 99 | 25.3% | 21.7% |
| 2018 | 378 | 18.3% | 23.5% |
| 2019 | 180 | 17.2% | 29.6% |
| 2020 | 107 | 11.2% | 23.2% |
| 2021 | 249 | 5.2% | 15.4% |
| 2022 | 816 | 19.5% | 22.8% |
| 2023 | 496 | 12.3% | 18.5% |
Pooled shares: Radon411's sum of CDC's county counts for one period.
Sarasota County, Geology
The ground under Sarasota County
PredictedUSGS's geologic map puts all of Sarasota County's mapped land in one class: low radon potential. 95.1% 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).
| 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 | 95.1% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Sarasota County beside the ground around it
Across Florida 7.1% of the land is rated moderate; none of Sarasota County's is. Of the 3 counties that border it, 1 has more moderate-potential ground, Manatee County the most at 6.9%.
The map rates the ground, not the air in any home.
Local help
Sarasota County, Local resources
Radon testing and mitigation in Sarasota County
Listed radon businesses with an address in Sarasota 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: Sarasota
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
Sarasota County, Questions
Questions about radon in Sarasota County
Are radon levels high in Sarasota County?
In 2023, 12.3% of the radon tests reported to CDC for Sarasota County, Florida were at or above 4 pCi/L, and the median reported pre-mitigation result was 1.6 pCi/L. Of 30 Florida counties with 30 or more tests for the same period, 9 reported a higher share; pooled, the state comes to 18.5%.
Which counties border Sarasota County?
Sarasota County borders 3 counties: Manatee County, DeSoto County and Charlotte County.
Products
Sarasota County, Products
Testing a home in Sarasota County
In Sarasota County, 12.3% of 496 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 Sarasota 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
RadonPro Wi-Fi radon monitor with a built-in Geiger counter
- C-NRPP 2024/25: Not included
- Plug-in
- Wi-Fi
- Alarm
- Screen, app
First reading: Within 5 minutes
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Sarasota County, Bordering counties
Counties bordering Sarasota 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 · 19.6 points above Sarasota County
- Radon levels in Manatee CountyEPA zone 3
11.0%at or above 4 pCi/L
Median 1.5 pCi/L · 263 tests · 1.3 points below Sarasota County
- Radon levels in DeSoto CountyEPA zone 3
0.0%at or above 4 pCi/L
Median 1.7 pCi/L · 1 test · 12.3 points below Sarasota County
Sarasota County, Cities and towns
Cities and towns in Sarasota County
Sarasota County is growing: the Census Bureau puts it at 479,958 residents on July 1, 2025, up 10.0% from 436,262 in 2020. That works out to 863 people per square mile of land. Its largest town, North Port, has 96,551 residents, 20.1% of the total. CDC's 496 reported tests for 2023 work out to 1.0 per 1,000 residents (2025 estimate), close to Florida's 0.7.
From North Port to Longboat Key, CDC publishes no figure by town: each reads Sarasota County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| North Port | 96,551 | +27.5% | 20.1% |
| Sarasota | 58,458 | +5.9% | 12.2% |
| Venice | 30,477 | +19.0% | 6.3% |
| Longboat Keyextends beyond Sarasota County | 7,359 | −1.9% | Counted whole |
Places in Sarasota County with a city page: 1 of 1
4 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). A place that extends beyond Sarasota County is counted whole, so it has no share.
Sarasota County, Homes
Homes in Sarasota County
Of Sarasota County's 260,272 homes, 57% are detached houses, against 55% across Florida; 20% are in buildings of five or more homes. Half of its homes were built before 1987, close to Florida's 1988: 8% date from before 1960 and 31% from 2000 or later. Owners live in 76% of the occupied homes (Florida: 67%), so for most households a test and a fix are their own to order.
| Homes | Sarasota County | Florida |
|---|---|---|
| Housing units | 260,272 | 10,082,356 |
| Detached houses | 57% | 55% |
| In buildings of 5 or more | 20% | 25% |
| Mobile homes | 9% | 8% |
| Built before 1960 | 8% | 10% |
| Built since 2000 | 31% | 30% |
| Middle year built | 1987 | 1988 |
| Owner-occupied | 76% | 67% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.