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 Bradford County, Florida
EPA puts Bradford County in Zone 3, its lowest radon zone, and only 5 radon tests from it are on file with CDC (2021). Homes with elevated levels occur in all three zones, so only a test measures yours.
Data checked By Radon411Methodology
Highest bordering
35.2%
Alachua County
- Alachua
- 35.2%
- Putnam
- 1.1%
2 of 5 neighbours have 30+ tests, 2008 to 2017
Nearest county
35.2%
Alachua County, 22 miles
- Alachua
- 35.2%
- Florida
- 22.7%
Share at 4+ pCi/L, 2,162 tests, 2008 to 2017
Ground above low
22.2%
15.1 pts above Florida
- Bradford
- 22.2%
- Florida
- 7.1%
Share of land USGS rates moderate or high potential
Tests reported
5
Too few for a share
- Bradford
- 5
- Needed
- 30
2021
EPA radon zone
Zone 3
Lower potential
- 1
- 2
- Zone 3
1 highest, 3 lowest
EPA predicts under 2 pCi/L indoors
Read a result for Bradford County
Starts at EPA's action level
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 4.0 pCi/L
At or above 4 pCi/L
- Under 20 to 1.9 pCi/L
- 2 to 4consider a fix
- 4 and aboveEPA says fix it
This result is at or above 4 pCi/L. EPA recommends fixing a home when the radon level is 4 pCi/L or higher.
The data
Bradford County, At a glance
Bradford County at a glance
Predicted: EPA radon zone
EPA Zone 3: lower predicted potential
USGS geologic potential: Low across 78% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Bradford County, 2021
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2015 | 0.0% |
| 2016 | 0.0% |
| 2017 | 0.0% |
| 2021 | 0.0% |
2021: 0.0%. Across these years the share ran from 0.0% to 0.0%. Each column counts radon tests reported to CDC that year, not homes.
What these figures count
Only 5 tests were reported to CDC for Bradford County over 2021, 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: 2021. Measured data period: 2005 to 2021 (every CDC figure on file).
Bradford County, Compared
Bradford County radon figures, compared
Calculated by Radon411CDC's largest figure for Bradford County rests on 5 tests in 2021, 0 of them at or above 4 pCi/L, so each test moves its share by 20.0 points and no rank or comparison is drawn from it. Results reached as high as 1.2 pCi/L, with a middle value of 1.0 pCi/L.
Of the counties bordering it, 2 have a figure over the 2008 to 2017 laboratory totals: Alachua County reported the largest share at or above 4 pCi/L, 35.2%, and Putnam County the smallest, 1.1%. Farther out, Columbia County (33 miles away) at 6.7%, Duval County (40 miles away) at 1.3% and St. Johns County (44 miles away) at 6.0% have figures too. Pooled across 62 Florida counties, 22.7% of reported tests reached that level; across every county in the country with a figure, 35.7%.
Statewide for the same period, Marion County reported the highest share (42.9%) and St. Lucie County the lowest (0.0%). EPA's 1993 map puts Bradford County in Zone 3, its lowest label: a predicted county average under 2 pCi/L. USGS geology rates 78% of the county's land low radon potential.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Bradford County, Geology
The ground under Bradford County
PredictedMost of the ground under Bradford County is one class on USGS's geologic map: 77.8% of its land is low radon potential, with 22.2% moderate. The map puts 77.8% of Bradford County in the area it calls Gulf/Atlantic Lowland and Central Highland and 22.2% in Highland Anomalous areas. USGS gives the first a radon index of 6, in the low band (5 to 8), and the second 11, in the moderate band (9 to 11).
| 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 | 77.8% |
| Highland Anomalous areas | Phosphate deposits. | Moderate | 11 | 22.2% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Bradford County beside the ground around it
Bradford County has more moderate-potential ground than Florida as a whole: 22.2% of its land against 7.1%. Of the 5 counties that border it, 2 have more moderate-potential ground, Union County the most at 63.8%.
The map rates the ground, not the air in any home.
Local help
Bradford County, Local resources
Radon testing and mitigation in Bradford 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
Bradford County, Questions
Questions about radon in Bradford County
Are radon levels high in Bradford County?
In 2021, 0.0% of the radon tests reported to CDC for Bradford County, Florida were at or above 4 pCi/L, and the median reported pre-mitigation result was 1.0 pCi/L. Of the counties bordering it, 2 have a figure over the 2008 to 2017 laboratory totals: Alachua County reported the largest share at or above 4 pCi/L, 35.2%, and Putnam County the smallest, 1.1%.
Which counties border Bradford County?
Bradford County borders 5 counties: Union County, Alachua County, Clay County, Baker County and Putnam County.
Products
Bradford County, Products
Testing a home in Bradford County
No CDC figure names Bradford County; the nearest county with one, Alachua County (22 miles away), reported 35.2% of its tests at or above 4 pCi/L over the 2008 to 2017 laboratory totals, the only reading nearby until a test of this home. 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 Bradford 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-3786 rechargeable radon monitor with a 3.5-inch color screen
- C-NRPP 2024/25: Not included
- Battery
- Alarm
- Screen
Method: Ion chamber
First reading: Within 10 minutes
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Bradford County, Bordering counties
Counties bordering Bradford County
Calculated by Radon411- Radon levels in Union CountyEPA zone 2
66.7%at or above 4 pCi/L
Median 8.5 pCi/L · 3 tests
- Radon levels in Alachua CountyEPA zone 2
35.2%at or above 4 pCi/L
Median 2.9 pCi/L · 2,162 tests
- Radon levels in Clay CountyEPA zone 3
13.0%at or above 4 pCi/L
Median 1.2 pCi/L · 23 tests
- Radon levels in Putnam CountyEPA zone 3
1.1%at or above 4 pCi/L
Median 0.1 pCi/L · 95 tests
- Radon levels in Baker CountyEPA zone 3
0.0%at or above 4 pCi/L
Median 1.0 pCi/L · 1 test
Bradford County, Cities and towns
Cities and towns in Bradford County
Bradford County's population has barely moved since 2020: 28,307 residents on July 1, 2025 against 28,235 then, by the Census Bureau's estimates. That works out to 96 people per square mile of land. Its largest town, Starke, has 5,963 residents, 21.1% of the total. Together its 4 incorporated places hold 26.5% of those residents; the other 73.5% live outside any of them. Reported testing is thin here: 5 tests over 2021, or 0.2 for every 1,000 residents (2025 estimate), where Florida as a whole comes to 0.7.
From Starke to Brooker, CDC publishes no figure by town: each reads Bradford County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Starke | 5,963 | +2.9% | 21.1% |
| Lawtey | 685 | +8.2% | 2.4% |
| Hampton | 502 | +8.0% | 1.8% |
| Brooker | 339 | +6.3% | 1.2% |
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).
Bradford County, Homes
Homes in Bradford County
Of Bradford County's 10,826 homes, 61% are detached houses, against 55% across Florida; 31% are mobile homes. Half of its homes were built before 1985, close to Florida's 1988: 13% date from before 1960 and 24% from 2000 or later. 71% 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 | Bradford County | Florida |
|---|---|---|
| Housing units | 10,826 | 10,082,356 |
| Detached houses | 61% | 55% |
| In buildings of 5 or more | 6% | 25% |
| Mobile homes | 31% | 8% |
| Built before 1960 | 13% | 10% |
| Built since 2000 | 24% | 30% |
| Middle year built | 1985 | 1988 |
| Owner-occupied | 71% | 67% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.