Short-term kitKidde
442020 short-term charcoal radon test kit
- Lab fee included
Method: Charcoal
In home: 3 days
Locations and reports
Radon Levels in Harris County, Georgia
EPA puts Harris County in Zone 2, its middle radon zone, and 15.7% of its 51 reported radon tests (2008 to 2017, laboratory totals) were at or above 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
15.7%
9.1 pts below GA
- Harris
- 15.7%
- Georgia
- 24.8%
51 tests, 2008 to 2017
Median result
1.9pCi/L
Below action level
- Harris
- 1.9 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2008 to 2017
Tests reported
51
51st of 57 by tests
- Harris
- 51
- Fulton
- 4,858
Reported to CDC before any fix, 2008 to 2017
EPA radon zone
Zone 2
Moderate potential
- 1
- Zone 2
- 3
1 highest, 3 lowest
EPA predicts 2 to 4 pCi/L indoors
Rank in Georgia
49 of 57
Lowest quarter
- Harris
- 15.7%
- Barrow
- 48.3%
By share, of 57 with 30+ tests
Read a result for Harris County
Starts at Harris County's median, 1.9 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 1.9 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. Harris County's median reported result, 2008 to 2017.
The data
Harris County, At a glance
Harris County at a glance
Predicted: EPA radon zone
EPA Zone 2: moderate predicted potential
Harris County is a
USGS geologic potential: Moderate across 85% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Harris County, 2008 to 2017, laboratory
Under 2 pCi/L: 53%2 to 4 pCi/L: 31%4 pCi/L and above: 16%
Of 51 pre-mitigation tests reported to CDC, not homes in this area.
| Result band | Tests Measured | Share Measured |
|---|---|---|
| Under 2 pCi/L | 27 | 52.9% |
| 2 to 4 pCi/L | 16 | 31.4% |
| 4 pCi/L and above | 8 | 15.7% |
What these figures count
These are the 51 tests reported to CDC for Harris County over 2008 to 2017 (laboratory totals), 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: 2008 to 2017, laboratory. Measured data period: 2005 to 2017 (every CDC figure on file).
Harris County, Compared
Harris County radon figures, compared
Calculated by Radon411Harris County's 51 reported tests over the 2008 to 2017 laboratory totals had a middle value of 1.9 pCi/L and a maximum of 8.2 pCi/L, and 15.7% reached 4 pCi/L. Georgia as a whole (129 Georgia counties, pooled) comes to 24.8%: 9.1 points higher than here.
Among its state's counties it ranks 49th of 57 Georgia counties with 30 or more tests for the same period. Statewide for the same period, Barrow County reported the highest share (48.3%) and Richmond County the lowest (0.0%).
Below the action level, 27 tests (52.9%) came in under 2 pCi/L, against 44.0% statewide, and 16 tests (31.4%) fell between 2 and 4, against 31.2% statewide. CDC's ten-year totals for Harris County went from 48 tests (2005 to 2014) to 51 (2008 to 2017), the share going from 10.4% to 15.7%.
EPA's 1993 zone map puts Harris County in Zone 2, a predicted county average between 2 and 4 pCi/L. USGS geology rates 85% of the county's land moderate radon potential.
Next door, the shares run from 5.7% in Muscogee County to 33.9% in Troup County, with Lee County, AL and Muscogee County below Harris County.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Harris County, Geology
The ground under Harris County
PredictedMost of the ground under Harris County is one class on USGS's geologic map: 84.7% of its land is moderate radon potential, with 15.3% low. The map puts 84.5% of Harris County in the area it calls Georgiabama Thrust Stack (South) and 15.3% in Little River Thrust Stack. USGS gives the first a radon index of 9, in the moderate band (9 to 11), and the second 7, in the low band (5 to 8).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Georgiabama Thrust Stack (South) | Schist, amphibolite and granite. | Moderate | 9 | 84.5% |
| Little River Thrust Stack | Biotite and amphibolite gneiss, granite gneiss, mica schist. | Low | 7 | 15.3% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Harris County beside the ground around it
Harris County has more moderate-potential ground than Georgia as a whole: 84.7% of its land against 26.5%. Of the 6 counties that border it, 2 have more moderate-potential ground, Meriwether County the most at 100%.
The map rates the ground, not the air in any home.
Local help
Harris County, Local resources
Radon testing and mitigation in Harris 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
Harris County, Questions
Questions about radon in Harris County
Are radon levels high in Harris County?
Over the 2008 to 2017 laboratory totals, 15.7% of the radon tests reported to CDC for Harris County, Georgia were at or above 4 pCi/L, and the median reported pre-mitigation result was 1.9 pCi/L. Of 57 Georgia counties with 30 or more tests for the same period, 48 reported a higher share; pooled, the state comes to 24.8%.
Which counties border Harris County?
Harris County borders 6 counties: Muscogee County, GA, Talbot County, GA, Troup County, GA, Meriwether County, GA, Lee County, AL and Chambers County, AL.
Products
Harris County, Products
Testing a home in Harris County
In Harris County, 15.7% of 51 tests reported to CDC over the 2008 to 2017 laboratory totals reached 4 pCi/L, against 24.8% pooled across Georgia. In Zone 2 a short-term kit (2 to 90 days) is the quick first check in Harris 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
MonitorSafetySiren
Pro4 plug-in radon detector with a display and alarm
- C-NRPP 2024/25: Not included
- Plug-in
- Alarm
- Screen
First reading: Within 48 hours
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Harris County, Bordering counties
Counties bordering Harris County
Calculated by Radon411- Radon levels in Troup County, GAEPA zone 2
33.9%at or above 4 pCi/L
Median 2.9 pCi/L · 56 tests · 18.2 points above Harris County
- Radon levels in Lee County, ALEPA zone 2
12.3%at or above 4 pCi/L
Median 1.3 pCi/L · 81 tests · 3.4 points below Harris County
- Radon levels in Muscogee County, GAEPA zone 3
5.7%at or above 4 pCi/L
Median 0.9 pCi/L · 106 tests · 10.0 points below Harris County
- Radon levels in Meriwether County, GAEPA zone 2
4.5%at or above 4 pCi/L
Median 1.6 pCi/L · 22 tests · 11.2 points below Harris County
- Radon levels in Talbot County, GAEPA zone 2
0.0%at or above 4 pCi/L
Median 0.1 pCi/L · 1 test · 15.7 points below Harris County
- Radon levels in Chambers County, ALEPA zone 3
0.0%at or above 4 pCi/L
Median 0.8 pCi/L · 3 tests · 15.7 points below Harris County
Harris County, Cities and towns
Cities and towns in Harris County
Harris County is growing: the Census Bureau puts it at 37,280 residents on July 1, 2025, up 6.8% from 34,907 in 2020. That works out to 80 people per square mile of land. West Point, the largest place on its list (3,661 residents in all), extends beyond Harris County, so no share of the total is worked out for it. Reported testing is thin here: 51 tests over 2008 to 2017, or 1.4 for every 1,000 residents (2025 estimate), where Georgia as a whole comes to 2.7.
From West Point to Shiloh, CDC publishes no figure by town: each reads Harris County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| West Pointextends beyond Harris County | 3,661 | −0.5% | Counted whole |
| Hamilton | 1,824 | +6.4% | 4.9% |
| Pine Mountainextends beyond Harris County | 1,303 | +6.3% | Counted whole |
| Waverly Hall | 677 | +4.6% | 1.8% |
| Shiloh | 435 | +7.4% | 1.2% |
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 Harris County is counted whole, so it has no share.
Harris County, Homes
Homes in Harris County
Harris County is a place of houses on their own lots: 90% of its 14,506 homes are detached single-family houses, against 66% across Georgia. Half of its homes were built before 1996, close to Georgia's 1991: 9% date from before 1960 and 41% from 2000 or later. Owners live in 88% of the occupied homes (Georgia: 65%), so for most households a test and a fix are their own to order.
| Homes | Harris County | Georgia |
|---|---|---|
| Housing units | 14,506 | 4,483,873 |
| Detached houses | 90% | 66% |
| In buildings of 5 or more | 1% | 16% |
| Mobile homes | 8% | 8% |
| Built before 1960 | 9% | 12% |
| Built since 2000 | 41% | 33% |
| Middle year built | 1996 | 1991 |
| Owner-occupied | 88% | 65% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.