Short-term kit
Radon Short Term Test Kit short-term charcoal radon test kit, lab fee included
- Lab fee included
Method: Charcoal
In home: 2 to 7 days
Locations and reports
Radon Levels in Gilchrist County, Florida
EPA puts Gilchrist County in Zone 3, its lowest radon zone, and only 3 radon tests from it are on file with CDC (2022). 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%
- Columbia
- 6.7%
2 of 6 neighbours have 30+ tests, 2008 to 2017
Nearest county
35.2%
Alachua County, 27 miles
- Alachua
- 35.2%
- Florida
- 22.7%
Share at 4+ pCi/L, 2,162 tests, 2008 to 2017
Ground above low
3.8%
3.4 pts below Florida
- Gilchrist
- 3.8%
- Florida
- 7.1%
Share of land USGS rates moderate or high potential
Tests reported
11
Too few for a share
- Gilchrist
- 11
- Needed
- 30
2006 to 2015, laboratory
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 Gilchrist 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
Gilchrist County, At a glance
Gilchrist County at a glance
Predicted: EPA radon zone
EPA Zone 3: lower predicted potential
USGS geologic potential: Low across 96% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Gilchrist County, 2022
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2015 | 0.0% |
| 2016 | 0.0% |
| 2017 | 0.0% |
| 2019 | 0.0% |
| 2020 | 66.7% |
| 2021 | 0.0% |
| 2022 | 0.0% |
2022: 0.0%. Across these years the share ran from 0.0% to 66.7%. Each column counts radon tests reported to CDC that year, not homes.
What these figures count
Only 3 tests were reported to CDC for Gilchrist County over 2022, 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: 2022. Measured data period: 2005 to 2022 (every CDC figure on file).
Gilchrist County, Compared
Gilchrist County radon figures, compared
Calculated by Radon411CDC's largest figure for Gilchrist County rests on 11 tests over the 2006 to 2015 laboratory totals, 0 of them at or above 4 pCi/L, so each test moves its share by 9.1 points and no rank or comparison is drawn from it. Results reached as high as 1.4 pCi/L, with a middle value of 0.8 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 Columbia County the smallest, 6.7%. Farther out, Marion County (57 miles away) at 42.9%, Citrus County (63 miles away) at 9.9% and Putnam County (64 miles away) at 1.1% 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 Gilchrist County in Zone 3, its lowest label: a predicted county average under 2 pCi/L. USGS geology rates 96% of the county's land low radon potential.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Gilchrist County, Geology
The ground under Gilchrist County
PredictedMost of the ground under Gilchrist County is one class on USGS's geologic map: 96.2% of its land is low radon potential, with 3.8% moderate. 96.2% 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 | 96.2% |
| Highland Anomalous areas | Phosphate deposits. | Moderate | 11 | 3.8% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Gilchrist County beside the ground around it
On moderate-potential ground Gilchrist County is close to Florida as a whole: 3.8% of its land against 7.1%. Of the 6 counties that border it, 3 have more moderate-potential ground, Alachua County the most at 47.3%.
The map rates the ground, not the air in any home.
Local help
Gilchrist County, Local resources
Radon testing and mitigation in Gilchrist County
Listed radon businesses with an address in Gilchrist 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: Trenton
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
Gilchrist County, Questions
Questions about radon in Gilchrist County
Are radon levels high in Gilchrist County?
In 2022, 0.0% of the radon tests reported to CDC for Gilchrist County, Florida were at or above 4 pCi/L, and the median reported pre-mitigation result was 1.3 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 Columbia County the smallest, 6.7%.
Which counties border Gilchrist County?
Gilchrist County borders 6 counties: Dixie County, Alachua County, Levy County, Suwannee County, Lafayette County and Columbia County.
Products
Gilchrist County, Products
Testing a home in Gilchrist County
No CDC figure names Gilchrist County; the nearest county with one, Alachua County (27 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 Gilchrist County.
Test kits and monitors3
See every kit and monitor
Long-term kit
RL116 long-term radon test kit
- Lab fee extra
Method: Alpha track
In home: 90 days to 12 months
MonitorINKBIRD
INK-RD3 battery radon monitor with an e-ink screen
- C-NRPP 2024/25: Not included
- Battery
- Screen
First reading: Within 24 hours
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Gilchrist County, Bordering counties
Counties bordering Gilchrist County
Calculated by Radon411- Radon levels in Dixie CountyEPA zone 3
100.0%at or above 4 pCi/L
Median 5.4 pCi/L · 1 test
- 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 Levy CountyEPA zone 3
13.0%at or above 4 pCi/L
Median 1.9 pCi/L · 23 tests
- Radon levels in Columbia CountyEPA zone 2
6.7%at or above 4 pCi/L
Median 1.0 pCi/L · 30 tests
- Radon levels in Suwannee CountyEPA zone 3
0.0%at or above 4 pCi/L
Median 1.1 pCi/L · 21 tests
- Radon levels in Lafayette CountyEPA zone 3
No CDC figure for 2008 to 2017; its page reads it against its own neighbours.
Gilchrist County, Cities and towns
Cities and towns in Gilchrist County
Gilchrist County is growing: the Census Bureau puts it at 20,488 residents on July 1, 2025, up 14.5% from 17,890 in 2020. That works out to 59 people per square mile of land. No town dominates: Trenton, the largest, has 2,296 residents, 11.2% of the total. Reported testing is thin here: 11 tests over 2006 to 2015, or 0.5 for every 1,000 residents (2025 estimate), where Florida as a whole comes to 1.7.
From Trenton to Bell, CDC publishes no figure by town: each reads Gilchrist County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Trenton | 2,296 | +13.4% | 11.2% |
| Fanning Springsextends beyond Gilchrist County | 1,349 | +14.6% | Counted whole |
| Bell | 579 | +15.1% | 2.8% |
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). A place that extends beyond Gilchrist County is counted whole, so it has no share.
Gilchrist County, Homes
Homes in Gilchrist County
Mobile homes are 49% of Gilchrist County's 7,697 homes and detached houses 49%, against 55% across Florida. Much of Gilchrist County is recent building: 41% of its homes have gone up since 2000 and the middle year built is 1997, against 1988 for Florida. Owners live in 84% of the occupied homes (Florida: 67%), so for most households a test and a fix are their own to order.
| Homes | Gilchrist County | Florida |
|---|---|---|
| Housing units | 7,697 | 10,082,356 |
| Detached houses | 49% | 55% |
| In buildings of 5 or more | 1% | 25% |
| Mobile homes | 49% | 8% |
| Built before 1960 | 5% | 10% |
| Built since 2000 | 41% | 30% |
| Middle year built | 1997 | 1988 |
| Owner-occupied | 84% | 67% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.