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
Locations and reports
Radon Levels in Giles County, Tennessee
EPA puts Giles County in Zone 1, its highest radon zone, and only 2 radon tests from it are on file with CDC (2023). Homes with elevated levels occur in all three zones, so only a test measures yours.
Data checked By Radon411Methodology
Share at 4+ pCi/L
40.7%
7.4 pts above TN
- Giles
- 40.7%
- Tennessee
- 33.3%
140 tests, 2008 to 2017
Median result
3.3pCi/L
Below action level
- Giles
- 3.3 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2008 to 2017
Tests reported
140
36th of 80 by tests
- Giles
- 140
- Davidson
- 5,592
Reported to CDC before any fix, 2008 to 2017
EPA radon zone
Zone 1
Highest potential
- Zone 1
- 2
- 3
1 highest, 3 lowest
EPA predicts over 4 pCi/L indoors
Rank in Tennessee
20 of 80
Top quarter
- Giles
- 40.7%
- Jefferson
- 56.8%
By share, of 80 with 30+ tests
Read a result for Giles County
Starts at Giles County's median, 3.3 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 3.3 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. Giles County's median reported result, 2008 to 2017.
The data
Giles County, At a glance
Giles County at a glance
Predicted: EPA radon zone
EPA Zone 1: highest predicted potential
EPA puts all of Giles County in
USGS geologic potential: High across 100% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Giles County, 2023
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2022 | 25.0% |
| 2023 | 100.0% |
2023: 100.0%. Across these years the share ran from 25.0% to 100.0%. Each column counts radon tests reported to CDC that year, not homes.
What these figures count
Only 2 tests were reported to CDC for Giles County over 2023, 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: 2023. Measured data period: 2005 to 2023 (every CDC figure on file).
Giles County, Compared
Giles County radon figures, compared
Calculated by Radon411In Giles County, about 4 in 10 reported tests over the 2008 to 2017 laboratory totals (57 of 140) were at or above EPA's action level. Against the national pool of 35.7%, the gap is 5.0 points higher. Across 95 Tennessee counties pooled together, 33.3% of tests reached that level, so Giles County runs 7.4 points above its state.
The newest figure, in 2023, counts only 2 tests (100.0% at or above 4 pCi/L), too few to compare, so this reading uses the 140-test figure.
Of 6 neighbours with a figure, none reported a larger share at or above 4 pCi/L; the spread is 10.1% (Limestone County, AL) to 39.3% (Maury County). By share, Giles County is 20th of 80 Tennessee counties with 30 or more tests for the same period.
Half the tests came in under 3.3 pCi/L and half over it; the single highest reached 52.1 pCi/L. Below the action level, 40 tests (28.6%) came in under 2 pCi/L, against 42.4% statewide, and 43 tests (30.7%) fell between 2 and 4, against 24.3% statewide.
Zone 1 on EPA's map (predicted average above 4 pCi/L) and a 40.7% share point the same way here. USGS geology rates 100% of the county's land high radon potential. CDC also counts 8 tests taken after mitigation in Giles County for the same period: tests in homes where a fix was already in.
The busiest year on file was 2022, with 12 tests reported; the quietest, 2023, had 2.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Giles County, Geology
The ground under Giles County
PredictedMost of the ground under Giles County is one class on USGS's geologic map: 99.9% of its land is high radon potential, with 0.1% moderate. The map puts 85.6% of Giles County in the area it calls Nashville Basin and 14.3% in Cherty Highland. USGS gives the first a radon index of 14 and the second 12, both in the high band (12 to 17).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Nashville Basin | Mississippian Limestone. | High | 14 | 85.6% |
| Cherty Highland | Cherty dolostone. | High | 12 | 14.3% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Giles County beside the ground around it
Giles County has more high-potential ground than Tennessee as a whole: 99.9% of its land against 47.2%. Of the 6 counties that border it, 4 have more high-potential ground, Lawrence County the most at 100%.
The map rates the ground, not the air in any home.
Local help
Giles County, Local resources
Radon testing and mitigation in Giles County
- Tennessee Radon ProgramTennessee Radon Program, run by Department of Environment & Conservation, offers free or discounted test kits, and answers questions about testing and mitigation in Tennessee.Visit the program’s page(opens in a new tab)
- Free and low-cost kitsThe program says:
The Tennessee Radon Program provides free radon test kits and information assistance to residents, while also providing training opportunities to radon professionals across the state.
- Compare kits
- Professionals in Tennessee1 professional is listed in Tennessee.
What Tennessee's program says
- Phone
- 1-800-232-1139
- TDEC.Radon@tn.gov
What it means
Giles County, Questions
Questions about radon in Giles County
Are radon levels high in Giles County?
In 2023, 100.0% of the radon tests reported to CDC for Giles County, Tennessee were at or above 4 pCi/L, and the median reported pre-mitigation result was 4.3 pCi/L. Of 80 Tennessee counties with 30 or more tests for the same period, 19 reported a higher share; pooled, the state comes to 33.3%.
Which counties border Giles County?
Giles County borders 6 counties: Lawrence County, TN, Marshall County, TN, Lincoln County, TN, Limestone County, AL, Maury County, TN and Lauderdale County, AL.
Products
Giles County, Products
Testing a home in Giles County
In Giles County, 40.7% of 140 tests reported to CDC over the 2008 to 2017 laboratory totals reached 4 pCi/L, against 33.3% pooled across Tennessee. In Zone 1 the year-round level in Giles County is the one to know: a long-term test (more than 90 days) or a monitor, with a short-term kit for a first answer.
Test kits and monitors3
See every kit and monitor
MonitorAranet
Radon Plus battery digital radon monitor with an e-ink screen
- C-NRPP 2024/25: Approved
- Battery
- Bluetooth
- Alarm
- Screen, app
Method: Ion chamber
First reading: Within 10 minutes
Short-term kit
RA100 short-term liquid scintillation radon test kit
- Lab fee extra
Method: Liquid scintillation
In home: 48 to 96 hours
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Giles County is in EPA Zone 1, the highest predicted radon potential. Best radon monitors for Zone 1 counties like Giles County
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Giles County, Bordering counties
Counties bordering Giles County
Calculated by Radon411- Radon levels in Maury County, TNEPA zone 3
39.3%at or above 4 pCi/L
Median 3.0 pCi/L · 509 tests · 1.4 points below Giles County
- Radon levels in Lauderdale County, ALEPA zone 1
27.2%at or above 4 pCi/L
Median 2.2 pCi/L · 1,885 tests · 13.5 points below Giles County
- Radon levels in Lawrence County, TNEPA zone 1
21.3%at or above 4 pCi/L
Median 1.6 pCi/L · 136 tests · 19.4 points below Giles County
- Radon levels in Lincoln County, TNEPA zone 1
20.8%at or above 4 pCi/L
Median 1.9 pCi/L · 149 tests · 19.9 points below Giles County
- Radon levels in Marshall County, TNEPA zone 1
18.1%at or above 4 pCi/L
Median 1.6 pCi/L · 138 tests · 22.6 points below Giles County
- Radon levels in Limestone County, ALEPA zone 1
10.1%at or above 4 pCi/L
Median 1.3 pCi/L · 674 tests · 30.6 points below Giles County
Giles County, Cities and towns
Cities and towns in Giles County
The Census Bureau estimates 31,433 residents in Giles County for July 1, 2025, 1,087 more than in 2020 (+3.6%). That works out to 51 people per square mile of land. Its largest town, Pulaski, has 8,394 residents, 26.7% of the total. CDC's 140 reported tests for 2008 to 2017 work out to 4.5 per 1,000 residents (2025 estimate), close to Tennessee's 4.2.
From Pulaski to Lynnville, CDC publishes no figure by town: each reads Giles County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Pulaski | 8,394 | +0.2% | 26.7% |
| Ardmoreextends beyond Giles County | 1,244 | +2.8% | Counted whole |
| Elkton | 531 | −0.4% | 1.7% |
| Minor Hill | 527 | +4.2% | 1.7% |
| Lynnville | 331 | +13.0% | 1.1% |
5 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 Giles County is counted whole, so it has no share.
Giles County, Homes
Homes in Giles County
Of Giles County's 14,104 homes, 72% are detached houses, against 68% across Tennessee; 17% are mobile homes. Half of its homes were built before 1980, close to Tennessee's 1986: 19% date from before 1960 and 21% from 2000 or later. 74% of occupied homes are lived in by their owner (Tennessee: 67%); in the rest a tenant can run a test, but a fix is the landlord's to make.
| Homes | Giles County | Tennessee |
|---|---|---|
| Housing units | 14,104 | 3,095,472 |
| Detached houses | 72% | 68% |
| In buildings of 5 or more | 5% | 14% |
| Mobile homes | 17% | 8% |
| Built before 1960 | 19% | 18% |
| Built since 2000 | 21% | 29% |
| Middle year built | 1980 | 1986 |
| Owner-occupied | 74% | 67% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.