Long-term kit
RL116 long-term radon test kit
- Lab fee extra
Method: Alpha track
In home: 90 days to 12 months
Locations and reports
Radon Levels in Jessamine County, Kentucky
EPA puts Jessamine County in Zone 1, its highest radon zone, and high results are common there: 55.5% of the 789 radon tests reported to CDC (2008 to 2017, laboratory totals) came back 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
55.5%
11.8 pts above KY
- Jessamine
- 55.5%
- Kentucky
- 43.7%
789 tests, 2008 to 2017
Median result
4.7pCi/L
Action level reached
- Jessamine
- 4.7 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2008 to 2017
Tests reported
789
9th of 69 by tests
- Jessamine
- 789
- Jefferson
- 6,590
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 Kentucky
9 of 69
Top quarter
- Jessamine
- 55.5%
- Meade
- 68.4%
By share, of 69 with 30+ tests
Read a result for Jessamine County
Starts at Jessamine County's median, 4.7 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 4.7 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. Jessamine County's median reported result, 2008 to 2017.
The data
Jessamine County, At a glance
Jessamine County at a glance
Predicted: EPA radon zone
EPA Zone 1: highest predicted potential
EPA puts all of Jessamine 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 Jessamine County, 2008 to 2017, laboratory
Under 2 pCi/L: 23%2 to 4 pCi/L: 21%4 pCi/L and above: 56%
Of 789 pre-mitigation tests reported to CDC, not homes in this area.
| Result band | Tests Measured | Share Measured |
|---|---|---|
| Under 2 pCi/L | 184 | 23.3% |
| 2 to 4 pCi/L | 167 | 21.2% |
| 4 pCi/L and above | 438 | 55.5% |
What these figures count
These are the 789 tests reported to CDC for Jessamine 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).
Jessamine County, Compared
Jessamine County radon figures, compared
Calculated by Radon411More than half: 55.5% of the 789 radon tests reported to CDC for Jessamine County over the 2008 to 2017 laboratory totals read at least 4 pCi/L. That places it 9th of 69 Kentucky counties with 30 or more tests for the same period. That is 11.8 points above the 43.7% pooled from 120 Kentucky counties.
The median result, 4.7 pCi/L, sits above EPA's 4 pCi/L action level, and the top reported result was 131.0 pCi/L. The rest split 23.3% under 2 pCi/L and 21.2% from 2 to 4 (Kentucky: 33.2% and 23.1%). Zone 1 on EPA's map (predicted average above 4 pCi/L) and a 55.5% share point the same way here.
1 of its 5 bordering counties with figures ran higher, led by Woodford County at 57.9%; Mercer County reported 38.2%. Statewide for the same period, Meade County reported the highest share (68.4%) and Hopkins County the lowest (9.5%).
CDC's ten-year totals for Jessamine County went from 580 tests (2005 to 2014) to 789 (2008 to 2017), the share going from 56.7% to 55.5%.
Nationally, every county with a figure for the same period pools to 35.7%; Jessamine County sits 19.8 points above it. CDC also counts 74 tests taken after mitigation in Jessamine County for the same period: tests in homes where a fix was already in.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Jessamine County, Geology
The ground under Jessamine County
PredictedUSGS's geologic map puts all of Jessamine County's mapped land in one class: high radon potential. All of it lies in the area the map calls Inner Bluegrass, to which USGS gives a radon index of 13, in the high band (12 to 17).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Inner Bluegrass | Ordovician limestones, dolomites and shales. | High | 13 | 100% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Jessamine County beside the ground around it
Jessamine County has more high-potential ground than Kentucky as a whole: 100% of its land against 18.2%. Of the 5 counties that border it, none has as large a share of high-potential ground; Woodford County comes nearest at 100%.
The map rates the ground, not the air in any home.
Local help
Jessamine County, Local resources
Radon testing and mitigation in Jessamine 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
Jessamine County, Questions
Questions about radon in Jessamine County
Are radon levels high in Jessamine County?
Over the 2008 to 2017 laboratory totals, 55.5% of the radon tests reported to CDC for Jessamine County, Kentucky were at or above 4 pCi/L, and the median reported pre-mitigation result was 4.7 pCi/L. Of 69 Kentucky counties with 30 or more tests for the same period, 8 reported a higher share; pooled, the state comes to 43.7%.
Which counties border Jessamine County?
Jessamine County borders 5 counties: Fayette County, Woodford County, Garrard County, Mercer County and Madison County.
Products
Jessamine County, Products
Testing a home in Jessamine County
In Jessamine County, 55.5% of 789 tests reported to CDC over the 2008 to 2017 laboratory totals reached 4 pCi/L, against 43.7% pooled across Kentucky. In Zone 1 the year-round level in Jessamine 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
Monitor
RadonScan USB-powered radon monitor with a color screen
- C-NRPP 2024/25: Not included
- Plug-in
- Alarm
- Screen
First reading: Within 5 minutes
Short-term kitKidde
442020 short-term charcoal radon test kit
- Lab fee included
Method: Charcoal
In home: 3 days
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Jessamine County is in EPA Zone 1, the highest predicted radon potential. Best radon monitors for Zone 1 counties like Jessamine County
Explore
Jessamine County, Bordering counties
Counties bordering Jessamine County
Calculated by Radon411- Radon levels in Woodford CountyEPA zone 1
57.9%at or above 4 pCi/L
Median 4.9 pCi/L · 342 tests · 2.4 points above Jessamine County
- Radon levels in Fayette CountyEPA zone 1
54.5%at or above 4 pCi/L
Median 4.5 pCi/L · 5,263 tests · 1.0 points below Jessamine County
- Radon levels in Garrard CountyEPA zone 2
39.6%at or above 4 pCi/L
Median 2.6 pCi/L · 164 tests · 15.9 points below Jessamine County
- Radon levels in Madison CountyEPA zone 2
38.7%at or above 4 pCi/L
Median 2.9 pCi/L · 604 tests · 16.8 points below Jessamine County
- Radon levels in Mercer CountyEPA zone 1
38.2%at or above 4 pCi/L
Median 2.7 pCi/L · 288 tests · 17.3 points below Jessamine County
Jessamine County, Cities and towns
Cities and towns in Jessamine County
Jessamine County is growing: the Census Bureau puts it at 57,147 residents on July 1, 2025, up 7.7% from 53,038 in 2020. That works out to 332 people per square mile of land. Nicholasville alone is home to 33,857 of them, 59.2% of the total. Together its 3 incorporated places hold 70.6% of those residents; the other 29.4% live outside any of them. Testing is reported here more often than across the state: CDC's 789 reported tests for 2008 to 2017 come to 13.8 for every 1,000 residents (2025 estimate), against 6.3 for Kentucky.
From Nicholasville to Keene, CDC publishes no figure by town: each reads Jessamine County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Nicholasville | 33,857 | +8.7% | 59.2% |
| Wilmore | 6,380 | +6.1% | 11.2% |
| Keene | 105 | +6.1% | 0.2% |
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).
Jessamine County, Homes
Homes in Jessamine County
Of Jessamine County's 20,936 homes, 74% are detached houses, against 68% across Kentucky; 5% are in buildings of five or more homes. Much of Jessamine County is recent building: 32% of its homes have gone up since 2000 and the middle year built is 1991, against 1982 for Kentucky. 69% of occupied homes are lived in by their owner (Kentucky: 68%); in the rest a tenant can run a test, but a fix is the landlord's to make.
| Homes | Jessamine County | Kentucky |
|---|---|---|
| Housing units | 20,936 | 2,010,655 |
| Detached houses | 74% | 68% |
| In buildings of 5 or more | 5% | 12% |
| Mobile homes | 4% | 11% |
| Built before 1960 | 10% | 22% |
| Built since 2000 | 32% | 24% |
| Middle year built | 1991 | 1982 |
| Owner-occupied | 69% | 68% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.