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 Ohio County, Kentucky
EPA puts Ohio County in Zone 2, its middle radon zone, and only 17 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
31.3%
Breckinridge County
- Breckinridge
- 31.3%
- Daviess
- 20.0%
3 of 7 neighbours have 30+ tests, 2008 to 2017
Nearest county
20.0%
Daviess County, 22 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
- Ohio
- 100.0%
- Kentucky
- 94.3%
Share of land USGS rates moderate or high potential
Tests reported
17
Too few for a share
- Ohio
- 17
- 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 Ohio 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
Ohio County, At a glance
Ohio County at a glance
Predicted: EPA radon zone
EPA Zone 2: moderate predicted potential
Ohio 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 Ohio County, 2008 to 2017, laboratory
CDC holds 17 reported tests for Ohio County over the 2008 to 2017 laboratory totals, with a median of 1.9 pCi/L: too few to describe a county (Radon411 reads a share from 30 tests up). Ohio County beside the counties around it is how this page reads it.
What these figures count
Only 17 tests were reported to CDC for Ohio 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).
Ohio County, Compared
Ohio County radon figures, compared
Calculated by Radon411CDC's largest figure for Ohio County rests on 17 tests over the 2008 to 2017 laboratory totals, 2 of them at or above 4 pCi/L, so each test moves its share by 5.9 points and no rank or comparison is drawn from it. Results reached as high as 5.4 pCi/L, with a middle value of 1.9 pCi/L.
Of the counties bordering it, 3 have a figure over the 2008 to 2017 laboratory totals: Breckinridge County reported the largest share at or above 4 pCi/L, 31.3%, and Daviess County the smallest, 20.0%, with Grayson County at 27.8% between. Farther out, Edmonson County (38 miles away) at 21.0%, Hopkins County (40 miles away) at 9.5% and Warren County (41 miles away) at 61.5% 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 Ohio 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.
Ohio County, Geology
The ground under Ohio County
PredictedUSGS's geologic map puts all of Ohio County's mapped land in one class: moderate radon potential. 96.5% 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 | 96.5% |
| Mississippian Plateau | Mississippian marine limestones, dolomites, marine sandstones, siltstones, and shales. | Moderate | 11 | 3.5% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Ohio County beside the ground around it
Across Kentucky 18.2% of the land is rated high; none of Ohio County's is. Of the 7 counties that border it, none has as large a share of moderate-potential ground; Grayson County comes nearest at 100%.
The map rates the ground, not the air in any home.
Local help
Ohio County, Local resources
Radon testing and mitigation in Ohio 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
Ohio County, Questions
Questions about radon in Ohio County
Are radon levels high in Ohio County?
Over the 2008 to 2017 laboratory totals, 11.8% of the radon tests reported to CDC for Ohio County, Kentucky were at or above 4 pCi/L, and the median reported pre-mitigation result was 1.9 pCi/L. Of the counties bordering it, 3 have a figure over the 2008 to 2017 laboratory totals: Breckinridge County reported the largest share at or above 4 pCi/L, 31.3%, and Daviess County the smallest, 20.0%, with Grayson County at 27.8% between.
Which counties border Ohio County?
Ohio County borders 7 counties: McLean County, Butler County, Muhlenberg County, Daviess County, Hancock County, Grayson County and Breckinridge County.
Products
Ohio County, Products
Testing a home in Ohio County
No CDC figure names Ohio County; the nearest county with one, Daviess County (22 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 Ohio 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
Ohio County, Bordering counties
Counties bordering Ohio County
Calculated by Radon411- Radon levels in McLean CountyEPA zone 2
50.0%at or above 4 pCi/L
Median 6.7 pCi/L · 2 tests
- Radon levels in Breckinridge CountyEPA zone 2
31.3%at or above 4 pCi/L
Median 2.5 pCi/L · 32 tests
- Radon levels in Grayson CountyEPA zone 2
27.8%at or above 4 pCi/L
Median 2.2 pCi/L · 36 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 Hancock CountyEPA zone 2
16.7%at or above 4 pCi/L
Median 1.4 pCi/L · 6 tests
- Radon levels in Butler CountyEPA zone 2
3.8%at or above 4 pCi/L
Median 1.5 pCi/L · 26 tests
Ohio County, Cities and towns
Cities and towns in Ohio County
The Census Bureau estimates 23,934 residents in Ohio County for July 1, 2025, 187 more than in 2020 (+0.8%). That works out to 41 people per square mile of land. No town dominates: Beaver Dam, the largest, has 3,537 residents, 14.8% of the total. Together its 6 incorporated places hold 32.2% of those residents; the other 67.8% live outside any of them. Reported testing is thin here: 17 tests over 2008 to 2017, or 0.7 for every 1,000 residents (2025 estimate), where Kentucky as a whole comes to 6.3.
From Beaver Dam to Rockport, CDC publishes no figure by town: each reads Ohio County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Beaver Dam | 3,537 | +0.1% | 14.8% |
| Hartford | 2,665 | Level | 11.1% |
| Fordsville | 451 | +2.0% | 1.9% |
| Centertown | 413 | Level | 1.7% |
| McHenry | 378 | +1.9% | 1.6% |
| Rockport | 265 | +0.4% | 1.1% |
6 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).
Ohio County, Homes
Homes in Ohio County
Of Ohio County's 10,199 homes, 68% are detached houses, against 68% across Kentucky; 24% are mobile homes. Half of its homes were built before 1983, close to Kentucky's 1982: 19% date from before 1960 and 24% from 2000 or later. Owners live in 79% of the occupied homes (Kentucky: 68%), so for most households a test and a fix are their own to order.
| Homes | Ohio County | Kentucky |
|---|---|---|
| Housing units | 10,199 | 2,010,655 |
| Detached houses | 68% | 68% |
| In buildings of 5 or more | 2% | 12% |
| Mobile homes | 24% | 11% |
| Built before 1960 | 19% | 22% |
| Built since 2000 | 24% | 24% |
| Middle year built | 1983 | 1982 |
| Owner-occupied | 79% | 68% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.