Short-term kit
Air Chek Short-Term radon test kit you hang, lab fee included
- Lab fee included
In home: 72 to 168 hours
Locations and reports
Radon Levels in McLean County, Kentucky
EPA puts McLean County in Zone 2, its middle radon zone, and only 2 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
24.1%
Henderson County
- Henderson
- 24.1%
- Hopkins
- 9.5%
3 of 6 neighbours have 30+ tests, 2008 to 2017
Nearest county
20.0%
Daviess County, 17 miles
- Daviess
- 20.0%
- Kentucky
- 43.7%
Share at 4+ pCi/L, 145 tests, 2008 to 2017
Ground above low
100.0%
5.7 pts above Kentucky
- McLean
- 100.0%
- Kentucky
- 94.3%
Share of land USGS rates moderate or high potential
Tests reported
2
Too few for a share
- McLean
- 2
- 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 McLean 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
McLean County, At a glance
McLean County at a glance
Predicted: EPA radon zone
EPA Zone 2: moderate predicted potential
McLean 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 McLean County, 2008 to 2017, laboratory
CDC holds 2 reported tests for McLean County over the 2008 to 2017 laboratory totals, with a median of 6.7 pCi/L: too few to describe a county (Radon411 reads a share from 30 tests up). McLean County beside the counties around it is how this page reads it.
What these figures count
Only 2 tests were reported to CDC for McLean 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).
McLean County, Compared
McLean County radon figures, compared
Calculated by Radon411CDC's largest figure for McLean County rests on 2 tests over the 2008 to 2017 laboratory totals, 1 of them at or above 4 pCi/L, so each test moves its share by 50.0 points and no rank or comparison is drawn from it. Results reached as high as 11.4 pCi/L, with a middle value of 6.7 pCi/L.
Of the counties bordering it, 3 have a figure over the 2008 to 2017 laboratory totals: Henderson County reported the largest share at or above 4 pCi/L, 24.1%, and Hopkins County the smallest, 9.5%, with Daviess County at 20.0% between. Farther out, Christian County (46 miles away) at 36.1%, Todd County (48 miles away) at 17.7% and Breckinridge County (49 miles away) at 31.3% have figures too. Pooled across 120 Kentucky counties, 43.7% of reported tests reached that level; across every county in the country with a figure, 35.7%.
Statewide for the same period, Meade County reported the highest share (68.4%) and Hopkins County the lowest (9.5%). EPA's 1993 map puts McLean 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.
McLean County, Geology
The ground under McLean County
PredictedUSGS's geologic map puts all of McLean County's mapped land in one class: moderate radon potential. All of it lies in the area the map calls Western Coalfield, 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 |
|---|---|---|---|---|
| Western Coalfield | Limestones, shale, siltstone, and coal beds. | 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.
McLean County beside the ground around it
Across Kentucky 18.2% of the land is rated high; none of McLean County's is. Of the 6 counties that border it, none has as large a share of moderate-potential ground; Henderson County comes nearest at 100%.
The map rates the ground, not the air in any home.
Local help
McLean County, Local resources
Radon testing and mitigation in McLean 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
McLean County, Questions
Questions about radon in McLean County
Are radon levels high in McLean County?
Over the 2008 to 2017 laboratory totals, 50.0% of the radon tests reported to CDC for McLean County, Kentucky were at or above 4 pCi/L, and the median reported pre-mitigation result was 6.7 pCi/L. Of the counties bordering it, 3 have a figure over the 2008 to 2017 laboratory totals: Henderson County reported the largest share at or above 4 pCi/L, 24.1%, and Hopkins County the smallest, 9.5%, with Daviess County at 20.0% between.
Which counties border McLean County?
McLean County borders 6 counties: Daviess County, Ohio County, Muhlenberg County, Webster County, Hopkins County and Henderson County.
Products
McLean County, Products
Testing a home in McLean County
No CDC figure names McLean County; the nearest county with one, Daviess County (17 miles away), reported 20.0% of its tests at or above 4 pCi/L over the 2008 to 2017 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 McLean County; a long-term test tells the year-round average.
Test kits and monitors3
See every kit and monitor
Long-term kit
RL116 long-term radon test kit
- Lab fee extra
Method: Alpha track
In home: 90 days to 12 months
MonitorX-Sense
XR0A-iR Wi-Fi battery radon detector with a screen
- C-NRPP 2024/25: Not included
- Battery
- Wi-Fi
- Screen, app
Method: Alpha spectrometry
First reading: Within 24 hours
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
McLean County, Bordering counties
Counties bordering McLean County
Calculated by Radon411- Radon levels in Henderson CountyEPA zone 2
24.1%at or above 4 pCi/L
Median 2.3 pCi/L · 54 tests
- Radon levels in Daviess CountyEPA zone 2
20.0%at or above 4 pCi/L
Median 1.8 pCi/L · 145 tests
- Radon levels in Muhlenberg CountyEPA zone 2
17.6%at or above 4 pCi/L
Median 2.3 pCi/L · 17 tests
- Radon levels in Webster CountyEPA zone 2
12.5%at or above 4 pCi/L
Median 2.0 pCi/L · 8 tests
- Radon levels in Ohio CountyEPA zone 2
11.8%at or above 4 pCi/L
Median 1.9 pCi/L · 17 tests
- Radon levels in Hopkins CountyEPA zone 2
9.5%at or above 4 pCi/L
Median 1.7 pCi/L · 42 tests
McLean County, Cities and towns
Cities and towns in McLean County
About 9,064 people live in McLean County by the Census Bureau's estimate for July 1, 2025, 70 fewer than in 2020 (−0.8%). That works out to 36 people per square mile of land. No town dominates: Livermore, the largest, has 1,197 residents, 13.2% of the total. Together its 4 incorporated places hold 30.7% of those residents; the other 69.3% live outside any of them. Reported testing is thin here: 2 tests over 2008 to 2017, or 0.2 for every 1,000 residents (2025 estimate), where Kentucky as a whole comes to 6.3.
From Livermore to Sacramento, CDC publishes no figure by town: each reads McLean County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Livermore | 1,197 | −2.3% | 13.2% |
| Calhoun | 720 | −0.8% | 7.9% |
| Island | 447 | +2.5% | 4.9% |
| Sacramento | 423 | −0.9% | 4.7% |
4 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).
McLean County, Homes
Homes in McLean County
Of McLean County's 4,171 homes, 74% are detached houses, against 68% across Kentucky; 18% are mobile homes. Half of its homes were built before 1976, close to Kentucky's 1982: 22% date from before 1960 and 12% from 2000 or later. Owners live in 81% of the occupied homes (Kentucky: 68%), so for most households a test and a fix are their own to order.
| Homes | McLean County | Kentucky |
|---|---|---|
| Housing units | 4,171 | 2,010,655 |
| Detached houses | 74% | 68% |
| In buildings of 5 or more | 6% | 12% |
| Mobile homes | 18% | 11% |
| Built before 1960 | 22% | 22% |
| Built since 2000 | 12% | 24% |
| Middle year built | 1976 | 1982 |
| Owner-occupied | 81% | 68% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.