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 Santa Rosa County, Florida
EPA puts Santa Rosa County in Zone 3, its lowest radon zone, and most reported tests there come back low, though 2.2% of 273 (2022) 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
2.2%
20.6 pts below FL
- Santa Rosa
- 2.2%
- Florida
- 22.8%
273 tests, 2022
Median result
1.3pCi/L
Below action level
- Santa Rosa
- 1.3 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2022
Tests reported
273
23rd of 40 by tests
- Santa Rosa
- 273
- Miami-Dade
- 9,033
Reported to CDC before any fix, 2022
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
23 of 40
Middle half
- Santa Rosa
- 2.2%
- Palm Beach
- 54.7%
By share, of 40 with 30+ tests
Read a result for Santa Rosa County
Starts at Santa Rosa County's median, 1.3 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 1.3 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. Santa Rosa County's median reported result, 2022.
The data
Santa Rosa County, At a glance
Santa Rosa County at a glance
Predicted: EPA radon zone
EPA Zone 3: lower predicted potential
USGS geologic potential: Low across 89% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Santa Rosa County, 2022
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2014 | 0.0% |
| 2015 | 0.0% |
| 2016 | 0.0% |
| 2017 | 0.0% |
| 2018 | 0.0% |
| 2019 | 0.0% |
| 2020 | 0.0% |
| 2021 | 0.0% |
| 2022 | 2.2% |
2022: 2.2%. Across these years the share ran from 0.0% to 2.2%. Each column counts radon tests reported to CDC that year, not homes.
What these figures count
These are the 273 tests reported to CDC for Santa Rosa County over 2022, 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: 2022. Measured data period: 2005 to 2022 (every CDC figure on file).
Santa Rosa County, Compared
Santa Rosa County radon figures, compared
Calculated by Radon411Only 6 of 273 radon tests reported for Santa Rosa County in 2022 reached 4 pCi/L (2.2%). The median result, 1.3 pCi/L, sits below 2, well under EPA's 4 pCi/L action level, and the top reported result was 5.3 pCi/L.
Across 54 Florida counties pooled together, 22.8% of tests reached that level, so Santa Rosa County runs 20.6 points below its state. Against the national pool of 23.9%, the gap is 21.7 points lower. Its place in the state: 23rd of 40 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 2.2% share point the same way here. Of 2 neighbours with a figure, none reported a larger share at or above 4 pCi/L; the spread is 0.0% (Escambia County) to 1.7% (Okaloosa County).
Below the action level, 198 tests (72.5%) came in under 2 pCi/L, against 52.6% statewide, and 69 tests (25.3%) fell between 2 and 4, against 24.6% statewide. USGS geology rates 89% of the county's land low radon potential.
The busiest year on file was 2022, with 273 tests reported; the quietest, 2014, had 1.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Santa Rosa County, Geology
The ground under Santa Rosa County
PredictedUSGS's geologic map puts all of Santa Rosa County's mapped land in one class: low radon potential. 89.0% of it lies in the area the map calls Northern 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 |
|---|---|---|---|---|
| Northern Highland | Sand, silt, clay, gravel | Low | 6 | 89.0% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Santa Rosa County beside the ground around it
Across Florida 7.1% of the land is rated moderate; none of Santa Rosa County's is. None of the 3 counties that border it has any moderate-potential ground either.
The map rates the ground, not the air in any home.
Local help
Santa Rosa County, Local resources
Radon testing and mitigation in Santa Rosa 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
Santa Rosa County, Questions
Questions about radon in Santa Rosa County
Are radon levels high in Santa Rosa County?
In 2022, 2.2% of the radon tests reported to CDC for Santa Rosa County, Florida were at or above 4 pCi/L, and the median reported pre-mitigation result was 1.3 pCi/L. Of 40 Florida counties with 30 or more tests for the same period, 22 reported a higher share; pooled, the state comes to 22.8%.
Which counties border Santa Rosa County?
Santa Rosa County borders 3 counties: Escambia County, FL, Okaloosa County, FL and Escambia County, AL.
Products
Santa Rosa County, Products
Testing a home in Santa Rosa County
In Santa Rosa County, 2.2% of 273 tests reported to CDC in 2022 reached 4 pCi/L, against 22.8% 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 Santa Rosa 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
Santa Rosa County, Bordering counties
Counties bordering Santa Rosa County
Calculated by Radon411- Radon levels in Okaloosa County, FLEPA zone 3
1.7%at or above 4 pCi/L
Median 0.4 pCi/L · 180 tests · 0.5 points below Santa Rosa County
- Radon levels in Escambia County, FLEPA zone 3
0.0%at or above 4 pCi/L
Median 0.4 pCi/L · 420 tests · 2.2 points below Santa Rosa County
- Radon levels in Escambia County, ALEPA zone 3
No CDC figure for 2022; its page reads it against its own neighbours.
Santa Rosa County, Cities and towns
Cities and towns in Santa Rosa County
Santa Rosa County is growing: the Census Bureau puts it at 211,115 residents on July 1, 2025, up 11.7% from 189,024 in 2020. That works out to 209 people per square mile of land. No town dominates: Milton, the largest, has 11,440 residents, 5.4% of the total. Together its 3 incorporated places hold 9.0% of those residents; the other 91.0% live outside any of them. Reported testing is thin here: 273 tests over 2022, or 1.3 for every 1,000 residents (2025 estimate), where Florida as a whole comes to 2.6.
From Milton to Jay, CDC publishes no figure by town: each reads Santa Rosa County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Milton | 11,440 | +11.3% | 5.4% |
| Gulf Breeze | 7,067 | +11.4% | 3.3% |
| Jay | 594 | +12.3% | 0.3% |
3 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).
Santa Rosa County, Homes
Homes in Santa Rosa County
Santa Rosa County is a place of houses on their own lots: 80% of its 78,275 homes are detached single-family houses, against 55% across Florida. Much of Santa Rosa County is recent building: 44% of its homes have gone up since 2000 and the middle year built is 1997, against 1988 for Florida. Owners live in 80% of the occupied homes (Florida: 67%), so for most households a test and a fix are their own to order.
| Homes | Santa Rosa County | Florida |
|---|---|---|
| Housing units | 78,275 | 10,082,356 |
| Detached houses | 80% | 55% |
| In buildings of 5 or more | 6% | 25% |
| Mobile homes | 8% | 8% |
| Built before 1960 | 5% | 10% |
| Built since 2000 | 44% | 30% |
| Middle year built | 1997 | 1988 |
| Owner-occupied | 80% | 67% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.