Short-term kitempowerDX
Standard Radon Test short-term mail-in radon test kit
- Lab fee included
Method: Passive sampler
In home: 48 to 96 hours
Locations and reports
Radon Levels in Garrard County, Kentucky
EPA puts Garrard County in Zone 2, its middle radon zone, and 39.6% of its 164 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
39.6%
4.1 pts below KY
- Garrard
- 39.6%
- Kentucky
- 43.7%
164 tests, 2008 to 2017
Median result
2.6pCi/L
Below action level
- Garrard
- 2.6 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2008 to 2017
Tests reported
164
27th of 69 by tests
- Garrard
- 164
- Jefferson
- 6,590
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 Kentucky
28 of 69
Middle half
- Garrard
- 39.6%
- Meade
- 68.4%
By share, of 69 with 30+ tests
Read a result for Garrard County
Starts at Garrard County's median, 2.6 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 2.6 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. Garrard County's median reported result, 2008 to 2017.
The data
Garrard County, At a glance
Garrard County at a glance
Predicted: EPA radon zone
EPA Zone 2: moderate predicted potential
Garrard County is a
USGS geologic potential: Moderate across 50% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Garrard County, 2008 to 2017, laboratory
Under 2 pCi/L: 40%2 to 4 pCi/L: 20%4 pCi/L and above: 40%
Of 164 pre-mitigation tests reported to CDC, not homes in this area.
| Result band | Tests Measured | Share Measured |
|---|---|---|
| Under 2 pCi/L | 66 | 40.2% |
| 2 to 4 pCi/L | 33 | 20.1% |
| 4 pCi/L and above | 65 | 39.6% |
What these figures count
These are the 164 tests reported to CDC for Garrard 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).
Garrard County, Compared
Garrard County radon figures, compared
Calculated by Radon411In Garrard County, about 4 in 10 reported tests over the 2008 to 2017 laboratory totals (65 of 164) were at or above EPA's action level. Against the national pool of 35.7%, the gap is 3.9 points higher. Across 120 Kentucky counties pooled together, 43.7% of tests reached that level, so Garrard County runs 4.1 points below its state.
Of 5 neighbours with a figure, 2 reported a larger share at or above 4 pCi/L and 3 a smaller one; the spread is 35.6% (Lincoln County) to 55.5% (Jessamine County). By share, Garrard County is 28th of 69 Kentucky counties with 30 or more tests for the same period.
Half the tests came in under 2.6 pCi/L and half over it; the single highest reached 59.9 pCi/L. Below the action level, 66 tests (40.2%) came in under 2 pCi/L, against 33.2% statewide, and 33 tests (20.1%) fell between 2 and 4, against 23.1% statewide.
Zone 2 on EPA's map (predicted average between 2 and 4 pCi/L) and a 39.6% share point the same way here. USGS geology rates 50% of the county's land moderate radon potential. CDC also counts 10 tests taken after mitigation in Garrard County for the same period: tests in homes where a fix was already in.
CDC's ten-year totals for Garrard County went from 152 tests (2005 to 2014) to 164 (2008 to 2017), the share going from 40.8% to 39.6%.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Garrard County, Geology
The ground under Garrard County
PredictedUSGS's geologic map splits Garrard County: 50.3% of its land is moderate radon potential and 49.7% high. The map puts 50.3% of Garrard County in the area it calls Outer Bluegrass and 25.5% in Inner Bluegrass, with 2 smaller areas beside them. USGS gives the first a radon index of 11, in the moderate band (9 to 11), and the second 13, in the high band (12 to 17).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Outer Bluegrass | Ordovician-Devonian limestone and shale. | Moderate | 11 | 50.3% |
| Inner Bluegrass | Ordovician limestones, dolomites and shales. | High | 13 | 25.5% |
| New Albany-Chattanooga Shale | Devonian/Mississippian Black shale. | High | 14 | 16.2% |
| Eastern Pennyroyal | Marine shale, sandstone and limestone. | High | 12 | 8.0% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Garrard County beside the ground around it
Garrard County has more high-potential ground than Kentucky as a whole: 49.7% of its land against 18.2%. Of the 6 counties that border it, 4 have more high-potential ground, Jessamine County the most at 100%.
The map rates the ground, not the air in any home.
Local help
Garrard County, Local resources
Radon testing and mitigation in Garrard County
- Kentucky's radon programKentucky Board of Radon SafetyKentucky's radon program answers questions about testing, mitigation and the rules in Kentucky.Visit the program’s page(opens in a new tab)
- Free and low-cost kitsAsk the program whether it has free or discounted kits, or compare kits you can buy.
- Compare kits
- Professionals in Kentucky8 professionals are listed in Kentucky.
What Kentucky's program says
- Phone
- 502-782-2782
- Radon@ky.gov
What it means
Garrard County, Questions
Questions about radon in Garrard County
Are radon levels high in Garrard County?
Over the 2008 to 2017 laboratory totals, 39.6% of the radon tests reported to CDC for Garrard County, Kentucky were at or above 4 pCi/L, and the median reported pre-mitigation result was 2.6 pCi/L. Of 69 Kentucky counties with 30 or more tests for the same period, 27 reported a higher share; pooled, the state comes to 43.7%.
Which counties border Garrard County?
Garrard County borders 6 counties: Lincoln County, Madison County, Boyle County, Jessamine County, Mercer County and Rockcastle County.
Products
Garrard County, Products
Testing a home in Garrard County
In Garrard County, 39.6% of 164 tests reported to CDC over the 2008 to 2017 laboratory totals reached 4 pCi/L, against 43.7% pooled across Kentucky. In Zone 2 a short-term kit (2 to 90 days) is the quick first check in Garrard 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
MonitorAEGTEST
HOUND-1011 rechargeable radon detector with a screen
- 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
Garrard County, Bordering counties
Counties bordering Garrard County
Calculated by Radon411- Radon levels in Jessamine CountyEPA zone 1
55.5%at or above 4 pCi/L
Median 4.7 pCi/L · 789 tests · 15.9 points above Garrard County
- Radon levels in Boyle CountyEPA zone 1
53.9%at or above 4 pCi/L
Median 4.4 pCi/L · 492 tests · 14.3 points above Garrard County
- Radon levels in Rockcastle CountyEPA zone 2
42.9%at or above 4 pCi/L
Median 3.0 pCi/L · 14 tests · 3.3 points above Garrard County
- Radon levels in Madison CountyEPA zone 2
38.7%at or above 4 pCi/L
Median 2.9 pCi/L · 604 tests · 0.9 points below Garrard County
- Radon levels in Mercer CountyEPA zone 1
38.2%at or above 4 pCi/L
Median 2.7 pCi/L · 288 tests · 1.4 points below Garrard County
- Radon levels in Lincoln CountyEPA zone 1
35.6%at or above 4 pCi/L
Median 2.8 pCi/L · 135 tests · 4.0 points below Garrard County
Garrard County, Cities and towns
Cities and towns in Garrard County
Garrard County is growing: the Census Bureau puts it at 18,207 residents on July 1, 2025, up 7.3% from 16,965 in 2020. That works out to 79 people per square mile of land. Lancaster, its one incorporated place, has 4,111 residents, 22.6% of the total. CDC's 164 reported tests for 2008 to 2017 work out to 9.0 per 1,000 residents (2025 estimate), close to Kentucky's 6.3.
Lancaster is the one incorporated place here; CDC publishes no figure by town, so it reads Garrard County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Lancaster | 4,111 | +5.2% | 22.6% |
One incorporated place, 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).
Garrard County, Homes
Homes in Garrard County
Garrard County is a place of houses on their own lots: 82% of its 7,272 homes are detached single-family houses, against 68% across Kentucky. Half of its homes were built before 1987, close to Kentucky's 1982: 15% date from before 1960 and 27% from 2000 or later. Owners live in 80% of the occupied homes (Kentucky: 68%), so for most households a test and a fix are their own to order.
| Homes | Garrard County | Kentucky |
|---|---|---|
| Housing units | 7,272 | 2,010,655 |
| Detached houses | 82% | 68% |
| In buildings of 5 or more | 1% | 12% |
| Mobile homes | 11% | 11% |
| Built before 1960 | 15% | 22% |
| Built since 2000 | 27% | 24% |
| Middle year built | 1987 | 1982 |
| Owner-occupied | 80% | 68% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.