Short-term kitFirst Alert
RD1 short-term charcoal radon test kit
- Lab fee included
Method: Charcoal
In home: 2 to 4 days
Locations and reports
Radon Levels in Campbell County, Kentucky
EPA puts Campbell County in Zone 2, its middle radon zone, and 26.2% of its 543 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
26.2%
17.5 pts below KY
- Campbell
- 26.2%
- Kentucky
- 43.7%
543 tests, 2008 to 2017
Median result
2.3pCi/L
Below action level
- Campbell
- 2.3 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2008 to 2017
Tests reported
543
12th of 69 by tests
- Campbell
- 543
- 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
51 of 69
Middle half
- Campbell
- 26.2%
- Meade
- 68.4%
By share, of 69 with 30+ tests
Read a result for Campbell County
Starts at Campbell County's median, 2.3 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 2.3 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. Campbell County's median reported result, 2008 to 2017.
The data
Campbell County, At a glance
Campbell County at a glance
Predicted: EPA radon zone
EPA Zone 2: moderate predicted potential
Campbell County is a
USGS geologic potential: Moderate across 86% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Campbell County, 2008 to 2017, laboratory
Under 2 pCi/L: 41%2 to 4 pCi/L: 33%4 pCi/L and above: 26%
Of 543 pre-mitigation tests reported to CDC, not homes in this area.
| Result band | Tests Measured | Share Measured |
|---|---|---|
| Under 2 pCi/L | 222 | 40.9% |
| 2 to 4 pCi/L | 179 | 33.0% |
| 4 pCi/L and above | 142 | 26.2% |
What these figures count
These are the 543 tests reported to CDC for Campbell 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).
Campbell County, Compared
Campbell County radon figures, compared
Calculated by Radon411Campbell County's 543 reported tests over the 2008 to 2017 laboratory totals had a middle value of 2.3 pCi/L and a maximum of 21.5 pCi/L, and 26.2% reached 4 pCi/L. Kentucky as a whole (120 Kentucky counties, pooled) comes to 43.7%: 17.5 points higher than here.
Among its state's counties it ranks 51st 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, 222 tests (40.9%) came in under 2 pCi/L, against 33.2% statewide, and 179 tests (33.0%) fell between 2 and 4, against 23.1% statewide. CDC's ten-year totals for Campbell County went from 385 tests (2005 to 2014) to 543 (2008 to 2017), the share going from 25.7% to 26.2%.
EPA's 1993 zone map puts Campbell County in Zone 2, a predicted county average between 2 and 4 pCi/L. USGS geology rates 86% of the county's land moderate radon potential.
Next door, the shares run from 26.0% in Kenton County to 50.0% in Clermont County, OH, with Kenton County below Campbell County.
CDC also counts 32 tests taken after mitigation in Campbell 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.
Campbell County, Geology
The ground under Campbell County
PredictedMost of the ground under Campbell County is one class on USGS's geologic map: 86.3% of its land is moderate radon potential, with 13.7% high. The map puts 85.3% of Campbell County in the area it calls Outer Bluegrass and 13.7% in Inner Bluegrass, with one smaller area 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 | 85.3% |
| Inner Bluegrass | Ordovician limestones, dolomites and shales. | High | 13 | 13.7% |
| Till Plains | Ordovician shale and limestone; glacial till. | Moderate | 11 | 1.1% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Campbell County beside the ground around it
On high-potential ground Campbell County is close to Kentucky as a whole: 13.7% of its land against 18.2%. Of the 4 counties that border it, 2 have more high-potential ground, Pendleton County the most at 39.8%.
The map rates the ground, not the air in any home.
Local help
Campbell County, Local resources
Radon testing and mitigation in Campbell County
Listed radon businesses with an address in Campbell 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.
Listed radon professionals by town: Alexandria, Cold Spring, Dayton
What Kentucky's program says
- Phone
- 502-782-2782
- Radon@ky.gov
What it means
Campbell County, Questions
Questions about radon in Campbell County
Are radon levels high in Campbell County?
Over the 2008 to 2017 laboratory totals, 26.2% of the radon tests reported to CDC for Campbell County, Kentucky were at or above 4 pCi/L, and the median reported pre-mitigation result was 2.3 pCi/L. Of 69 Kentucky counties with 30 or more tests for the same period, 50 reported a higher share; pooled, the state comes to 43.7%.
Which counties border Campbell County?
Campbell County borders 4 counties: Kenton County, KY, Clermont County, OH, Hamilton County, OH and Pendleton County, KY.
Products
Campbell County, Products
Testing a home in Campbell County
In Campbell County, 26.2% of 543 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 Campbell 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
MonitorAEGTEST
HOUND-1011S rechargeable radon detector with a screen
- C-NRPP 2024/25: Not included
- Battery
- Alarm
- Screen
Method: Semiconductor sensor
First reading: Within 12 hours
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Campbell County, Bordering counties
Counties bordering Campbell County
Calculated by Radon411- Radon levels in Clermont County, OHEPA zone 2
50.0%at or above 4 pCi/L
Median 4.0 pCi/L · 1,363 tests · 23.8 points above Campbell County
- Radon levels in Hamilton County, OHEPA zone 1
34.7%at or above 4 pCi/L
Median 2.8 pCi/L · 3,754 tests · 8.5 points above Campbell County
- Radon levels in Pendleton County, KYEPA zone 1
26.5%at or above 4 pCi/L
Median 1.9 pCi/L · 34 tests · 0.3 points above Campbell County
- Radon levels in Kenton County, KYEPA zone 2
26.0%at or above 4 pCi/L
Median 2.3 pCi/L · 1,167 tests · 0.2 points below Campbell County
Campbell County, Cities and towns
Cities and towns in Campbell County
The Census Bureau estimates 95,441 residents in Campbell County for July 1, 2025, 2,300 more than in 2020 (+2.5%). That works out to 631 people per square mile of land. No town dominates: Fort Thomas, the largest, has 17,142 residents, 18.0% of the total. Together its 15 incorporated places hold 80.4% of those residents; the other 19.6% live outside any of them. CDC's 543 reported tests for 2008 to 2017 work out to 5.7 per 1,000 residents (2025 estimate), close to Kentucky's 6.3.
From Fort Thomas to California, CDC publishes no figure by town: each reads Campbell County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Fort Thomas | 17,142 | −1.6% | 18.0% |
| Newport | 13,998 | −1.1% | 14.7% |
| Alexandria | 10,994 | +6.0% | 11.5% |
| Cold Spring | 6,640 | +6.1% | 7.0% |
| Highland Heights | 6,341 | −4.6% | 6.6% |
| Dayton | 5,974 | +5.3% | 6.3% |
| Bellevue | 5,847 | +5.4% | 6.1% |
| Southgate | 3,868 | +5.9% | 4.1% |
| Wilder | 3,108 | −2.0% | 3.3% |
| Silver Grove | 1,333 | +5.6% | 1.4% |
| Melbourne | 491 | +5.8% | 0.5% |
| Crestview | 475 | +5.8% | 0.5% |
- Mentor
- Woodlawn
- California
15 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).
Campbell County, Homes
Homes in Campbell County
Of Campbell County's 41,784 homes, 64% are detached houses, against 68% across Kentucky; 22% are in buildings of five or more homes. The homes are older than Kentucky's as a whole: half were built before 1972 (1982 for Kentucky), and 41% date from before 1960. 71% 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 | Campbell County | Kentucky |
|---|---|---|
| Housing units | 41,784 | 2,010,655 |
| Detached houses | 64% | 68% |
| In buildings of 5 or more | 22% | 12% |
| Mobile homes | 2% | 11% |
| Built before 1960 | 41% | 22% |
| Built since 2000 | 19% | 24% |
| Middle year built | 1972 | 1982 |
| Owner-occupied | 71% | 68% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.