Short-term kit
PicoCan short-term charcoal canister radon test
- Lab fee included
Method: Charcoal
In home: 48 to 96 hours
Locations and reports
Radon Levels in Lamar County, Georgia
EPA puts Lamar County in Zone 2, its middle radon zone, and only 15 radon tests from it are on file with CDC (2008 to 2017, laboratory totals). Homes with elevated levels occur in all three zones, so only a test measures yours.
Data checked By Radon411Methodology
Highest bordering
33.0%
Spalding County
- Spalding
- 33.0%
- Monroe
- 23.8%
2 of 5 neighbours have 30+ tests, 2007 to 2016
Nearest county
23.8%
Monroe County, 14 miles
- Monroe
- 23.8%
- Georgia
- 23.9%
Share at 4+ pCi/L, 235 tests, 2007 to 2016
Ground above low
100.0%
73.5 pts above Georgia
- Lamar
- 100.0%
- Georgia
- 26.5%
Share of land USGS rates moderate or high potential
Tests reported
15
Too few for a share
- Lamar
- 15
- Needed
- 30
2008 to 2017, laboratory
EPA radon zone
Zone 2
Moderate potential
- 1
- Zone 2
- 3
1 highest, 3 lowest
EPA predicts 2 to 4 pCi/L indoors
Read a result for Lamar 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
Lamar County, At a glance
Lamar County at a glance
Predicted: EPA radon zone
EPA Zone 2: moderate predicted potential
Lamar County is a
USGS geologic potential: Moderate across 100% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Lamar County, 2008 to 2017, laboratory
CDC holds 15 reported tests for Lamar County over the 2008 to 2017 laboratory totals, with a median of 2.1 pCi/L: too few to describe a county (Radon411 reads a share from 30 tests up). Lamar County beside the counties around it is how this page reads it.
What these figures count
Only 15 tests were reported to CDC for Lamar County over 2008 to 2017 (laboratory totals), 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: 2008 to 2017, laboratory. Measured data period: 2005 to 2017 (every CDC figure on file).
Lamar County, Compared
Lamar County radon figures, compared
Calculated by Radon411CDC's largest figure for Lamar County rests on 15 tests over the 2008 to 2017 laboratory totals, 6 of them at or above 4 pCi/L, so each test moves its share by 6.7 points and no rank or comparison is drawn from it. Results reached as high as 14.5 pCi/L, with a middle value of 2.1 pCi/L.
Of the counties bordering it, 2 have a figure over the 2007 to 2016 laboratory totals: Spalding County reported the largest share at or above 4 pCi/L, 33.0%, and Monroe County the smallest, 23.8%. Farther out, Henry County (26 miles away) at 21.5%, Fayette County (31 miles away) at 30.8% and Bibb County (32 miles away) at 0.0% have figures too. Pooled across 137 Georgia counties, 23.9% of reported tests reached that level; across every county in the country with a figure, 35.8%.
Statewide for the same period, Barrow County reported the highest share (51.0%) and Dougherty County the lowest (0.0%). EPA's 1993 map puts Lamar County in Zone 2, its middle label: a predicted county average between 2 and 4 pCi/L. USGS geology rates 100% of the county's land moderate radon potential.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Lamar County, Geology
The ground under Lamar County
PredictedUSGS's geologic map puts all of Lamar County's mapped land in one class: moderate radon potential. All of it lies in the area the map calls Georgiabama Thrust Stack (South), to which USGS gives a radon index of 9, in the moderate band (9 to 11).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Georgiabama Thrust Stack (South) | Schist, amphibolite and granite. | Moderate | 9 | 100% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Lamar County beside the ground around it
Lamar County has more moderate-potential ground than Georgia as a whole: 100% of its land against 26.5%. Of the 5 counties that border it, none has as large a share of moderate-potential ground; Pike County comes nearest at 100%.
The map rates the ground, not the air in any home.
Local help
Lamar County, Local resources
Radon testing and mitigation in Lamar County
- Georgia's radon programGeorgia Attorney General's Consumer Protection DivisionGeorgia's radon program does not license radon professionals and offers free or discounted test kits, and answers questions about testing and mitigation in Georgia.Visit the program’s page(opens in a new tab)
- Free and low-cost kitsThe program says:
A kit costs $15.00 if mailed or $10.00 if picked up at a participating County Extension office.
- Compare kits
- Professionals in Georgia3 professionals are listed in Georgia.
What Georgia's program says
- Licensing of radon professionals
There are no laws mandating a mitigator receive certification in Georgia, however, many mitigators choose to get certified by one of two national programs.
What it means
Lamar County, Questions
Questions about radon in Lamar County
Are radon levels high in Lamar County?
Over the 2008 to 2017 laboratory totals, 40.0% of the radon tests reported to CDC for Lamar County, Georgia were at or above 4 pCi/L, and the median reported pre-mitigation result was 2.1 pCi/L. Of the counties bordering it, 2 have a figure over the 2007 to 2016 laboratory totals: Spalding County reported the largest share at or above 4 pCi/L, 33.0%, and Monroe County the smallest, 23.8%.
Which counties border Lamar County?
Lamar County borders 5 counties: Spalding County, Pike County, Monroe County, Butts County and Upson County.
Products
Lamar County, Products
Testing a home in Lamar County
No CDC figure names Lamar County; the nearest county with one, Monroe County (14 miles away), reported 23.8% of its tests at or above 4 pCi/L over the 2007 to 2016 laboratory totals, the only reading nearby until a test of this home. In Zone 2 a short-term kit (2 to 90 days) is the quick first check in Lamar County; a long-term test tells the year-round average.
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
RM-65 rechargeable radon detector with a color screen and alarm
- C-NRPP 2024/25: Not included
- Battery
- Alarm
- Screen
Method: Semiconductor sensor
First reading: Within 6 hours
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Lamar County, Bordering counties
Counties bordering Lamar County
Calculated by Radon411- Radon levels in Pike CountyEPA zone 2
42.3%at or above 4 pCi/L
Median 3.2 pCi/L · 26 tests
- Radon levels in Spalding CountyEPA zone 2
33.0%at or above 4 pCi/L
Median 2.9 pCi/L · 97 tests
- Radon levels in Monroe CountyEPA zone 2
23.8%at or above 4 pCi/L
Median 1.8 pCi/L · 235 tests
- Radon levels in Upson CountyEPA zone 2
20.0%at or above 4 pCi/L
Median 0.7 pCi/L · 15 tests
- Radon levels in Butts CountyEPA zone 2
10.5%at or above 4 pCi/L
Median 2.4 pCi/L · 19 tests
Lamar County, Cities and towns
Cities and towns in Lamar County
Lamar County is growing: the Census Bureau puts it at 20,941 residents on July 1, 2025, up 12.9% from 18,555 in 2020. That works out to 114 people per square mile of land. Its largest town, Barnesville, has 6,329 residents, 30.2% of the total. Together its 3 incorporated places hold 35.1% of those residents; the other 64.9% live outside any of them. Reported testing is thin here: 15 tests over 2008 to 2017, or 0.7 for every 1,000 residents (2025 estimate), where Georgia as a whole comes to 2.7.
From Barnesville to Aldora, CDC publishes no figure by town: each reads Lamar County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Barnesville | 6,329 | +3.5% | 30.2% |
| Milner | 819 | +6.5% | 3.9% |
| Aldora | 192 | +15.0% | 0.9% |
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).
Lamar County, Homes
Homes in Lamar County
Of Lamar County's 7,738 homes, 74% are detached houses, against 66% across Georgia; 15% are mobile homes. Half of its homes were built before 1987, close to Georgia's 1991: 17% date from before 1960 and 29% from 2000 or later. Owners live in 76% of the occupied homes (Georgia: 65%), so for most households a test and a fix are their own to order.
| Homes | Lamar County | Georgia |
|---|---|---|
| Housing units | 7,738 | 4,483,873 |
| Detached houses | 74% | 66% |
| In buildings of 5 or more | 5% | 16% |
| Mobile homes | 15% | 8% |
| Built before 1960 | 17% | 12% |
| Built since 2000 | 29% | 33% |
| Middle year built | 1987 | 1991 |
| Owner-occupied | 76% | 65% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.