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 Daviess County, Kentucky
EPA puts Daviess County in Zone 2, its middle radon zone, and 20.0% of its 145 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
20.0%
23.7 pts below KY
- Daviess
- 20.0%
- Kentucky
- 43.7%
145 tests, 2008 to 2017
Median result
1.8pCi/L
Below action level
- Daviess
- 1.8 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2008 to 2017
Tests reported
145
28th of 69 by tests
- Daviess
- 145
- 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
61 of 69
Lowest quarter
- Daviess
- 20.0%
- Meade
- 68.4%
By share, of 69 with 30+ tests
Read a result for Daviess County
Starts at Daviess County's median, 1.8 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 1.8 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. Daviess County's median reported result, 2008 to 2017.
The data
Daviess County, At a glance
Daviess County at a glance
Predicted: EPA radon zone
EPA Zone 2: moderate predicted potential
Daviess 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 Daviess County, 2008 to 2017, laboratory
Under 2 pCi/L: 54%2 to 4 pCi/L: 26%4 pCi/L and above: 20%
Of 145 pre-mitigation tests reported to CDC, not homes in this area.
| Result band | Tests Measured | Share Measured |
|---|---|---|
| Under 2 pCi/L | 78 | 53.8% |
| 2 to 4 pCi/L | 38 | 26.2% |
| 4 pCi/L and above | 29 | 20.0% |
What these figures count
These are the 145 tests reported to CDC for Daviess 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).
Daviess County, Compared
Daviess County radon figures, compared
Calculated by Radon411Daviess County's 145 reported tests over the 2008 to 2017 laboratory totals had a middle value of 1.8 pCi/L and a maximum of 16.1 pCi/L, and 20.0% reached 4 pCi/L. Kentucky as a whole (120 Kentucky counties, pooled) comes to 43.7%: 23.7 points higher than here.
Among its state's counties it ranks 61st of 69 Kentucky counties with 30 or more tests for the same period. Statewide for the same period, Meade County reported the highest share (68.4%) and Hopkins County the lowest (9.5%).
Below the action level, 78 tests (53.8%) came in under 2 pCi/L, against 33.2% statewide, and 38 tests (26.2%) fell between 2 and 4, against 23.1% statewide. CDC's ten-year totals for Daviess County went from 118 tests (2005 to 2014) to 145 (2008 to 2017), the share going from 20.3% to 20.0%.
EPA's 1993 zone map puts Daviess County in Zone 2, a predicted county average between 2 and 4 pCi/L. USGS geology rates 100% of the county's land moderate radon potential.
Next door, the shares run from 20.9% in Warrick County, IN to 24.1% in Henderson County.
CDC also counts 7 tests taken after mitigation in Daviess 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.
Daviess County, Geology
The ground under Daviess County
PredictedUSGS's geologic map puts all of Daviess 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 | 99.5% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Daviess County beside the ground around it
Across Kentucky 18.2% of the land is rated high; none of Daviess 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
Daviess County, Local resources
Radon testing and mitigation in Daviess 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
Daviess County, Questions
Questions about radon in Daviess County
Are radon levels high in Daviess County?
Over the 2008 to 2017 laboratory totals, 20.0% of the radon tests reported to CDC for Daviess County, Kentucky were at or above 4 pCi/L, and the median reported pre-mitigation result was 1.8 pCi/L. Of 69 Kentucky counties with 30 or more tests for the same period, 60 reported a higher share; pooled, the state comes to 43.7%.
Which counties border Daviess County?
Daviess County borders 6 counties: Spencer County, IN, Hancock County, KY, McLean County, KY, Ohio County, KY, Warrick County, IN and Henderson County, KY.
Products
Daviess County, Products
Testing a home in Daviess County
In Daviess County, 20.0% of 145 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 Daviess 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
RadonScan-Plus USB-powered radon monitor with Wi-Fi
- C-NRPP 2024/25: Not included
- Plug-in
- Wi-Fi
- Alarm
- Screen, app
First reading: Within 5 minutes
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Daviess County, Bordering counties
Counties bordering Daviess County
Calculated by Radon411- Radon levels in Spencer County, INEPA zone 2
60.0%at or above 4 pCi/L
Median 4.5 pCi/L · 25 tests · 40.0 points above Daviess County
- Radon levels in McLean County, KYEPA zone 2
50.0%at or above 4 pCi/L
Median 6.7 pCi/L · 2 tests · 30.0 points above Daviess County
- Radon levels in Henderson County, KYEPA zone 2
24.1%at or above 4 pCi/L
Median 2.3 pCi/L · 54 tests · 4.1 points above Daviess County
- Radon levels in Warrick County, INEPA zone 2
20.9%at or above 4 pCi/L
Median 1.8 pCi/L · 561 tests · 0.9 points above Daviess County
- Radon levels in Hancock County, KYEPA zone 2
16.7%at or above 4 pCi/L
Median 1.4 pCi/L · 6 tests · 3.3 points below Daviess County
- Radon levels in Ohio County, KYEPA zone 2
11.8%at or above 4 pCi/L
Median 1.9 pCi/L · 17 tests · 8.2 points below Daviess County
Daviess County, Cities and towns
Cities and towns in Daviess County
The Census Bureau estimates 104,898 residents in Daviess County for July 1, 2025, 1,500 more than in 2020 (+1.5%). That works out to 229 people per square mile of land. Owensboro alone is home to 60,892 of them, 58.0% of the total. Together its 2 incorporated places hold 58.6% of those residents; the other 41.4% live outside any of them. Reported testing is thin here: 145 tests over 2008 to 2017, or 1.4 for every 1,000 residents (2025 estimate), where Kentucky as a whole comes to 6.3.
From Owensboro to Whitesville, CDC publishes no figure by town: each reads Daviess County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Owensboro | 60,892 | +1.0% | 58.0% |
| Whitesville | 587 | +0.7% | 0.6% |
2 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).
Daviess County, Homes
Homes in Daviess County
Of Daviess County's 44,199 homes, 74% are detached houses, against 68% across Kentucky; 10% are in buildings of five or more homes. Half of its homes were built before 1977, close to Kentucky's 1982: 25% date from before 1960 and 21% from 2000 or later. 67% 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 | Daviess County | Kentucky |
|---|---|---|
| Housing units | 44,199 | 2,010,655 |
| Detached houses | 74% | 68% |
| In buildings of 5 or more | 10% | 12% |
| Mobile homes | 6% | 11% |
| Built before 1960 | 25% | 22% |
| Built since 2000 | 21% | 24% |
| Middle year built | 1977 | 1982 |
| Owner-occupied | 67% | 68% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.