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
Locations and reports
Radon Levels in Columbiana County, Ohio
EPA puts Columbiana County in Zone 1, its highest radon zone, and high results are common there: 49.1% of the 662 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
49.1%
3.2 pts below OH
- Columbiana
- 49.1%
- Ohio
- 52.3%
662 tests, 2008 to 2017
Median result
3.8pCi/L
Below action level
- Columbiana
- 3.8 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2008 to 2017
Tests reported
662
33rd of 79 by tests
- Columbiana
- 662
- Franklin
- 16,142
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 Ohio
50 of 79
Middle half
- Columbiana
- 49.1%
- Pickaway
- 81.4%
By share, of 79 with 30+ tests
Read a result for Columbiana County
Starts at Columbiana County's median, 3.8 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 3.8 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. Columbiana County's median reported result, 2008 to 2017.
The data
Columbiana County, At a glance
Columbiana County at a glance
Predicted: EPA radon zone
EPA Zone 1: highest predicted potential
EPA puts all of Columbiana County in
USGS geologic potential: High across 61% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Columbiana County, 2008 to 2017, laboratory
Under 2 pCi/L: 25%2 to 4 pCi/L: 26%4 pCi/L and above: 49%
Of 662 pre-mitigation tests reported to CDC, not homes in this area.
| Result band | Tests Measured | Share Measured |
|---|---|---|
| Under 2 pCi/L | 163 | 24.6% |
| 2 to 4 pCi/L | 174 | 26.3% |
| 4 pCi/L and above | 325 | 49.1% |
What these figures count
These are the 662 tests reported to CDC for Columbiana 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).
Columbiana County, Compared
Columbiana County radon figures, compared
Calculated by Radon411In Columbiana County, about 5 in 10 reported tests over the 2008 to 2017 laboratory totals (325 of 662) were at or above EPA's action level. Against the national pool of 35.7%, the gap is 13.4 points higher. Across 88 Ohio counties pooled together, 52.3% of tests reached that level, so Columbiana County runs 3.2 points below its state.
Of 7 neighbours with a figure, 4 reported a larger share at or above 4 pCi/L and 2 a smaller one; the spread is 23.4% (Mahoning County) to 60.1% (Stark County). By share, Columbiana County is 50th of 79 Ohio counties with 30 or more tests for the same period.
Half the tests came in under 3.8 pCi/L and half over it; the single highest reached 146.6 pCi/L. Below the action level, 163 tests (24.6%) came in under 2 pCi/L, against 23.1% statewide, and 174 tests (26.3%) fell between 2 and 4, against 24.6% statewide.
Zone 1 on EPA's map (predicted average above 4 pCi/L) and a 49.1% share point the same way here. USGS geology rates 61% of the county's land high radon potential. CDC also counts 36 tests taken after mitigation in Columbiana County for the same period: tests in homes where a fix was already in.
CDC's ten-year totals for Columbiana County went from 593 tests (2005 to 2014) to 662 (2008 to 2017), the share going from 49.7% to 49.1%.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Columbiana County, Geology
The ground under Columbiana County
PredictedUSGS's geologic map splits Columbiana County: 60.8% of its land is high radon potential and 39.2% moderate. The map puts 60.7% of Columbiana County in the area it calls Area of Elevated Radioactivity and 39.2% in Glaciated Plateau. USGS gives the first a radon index of 12, in the high band (12 to 17), and the second 11, in the moderate band (9 to 11).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Area of Elevated Radioactivity | Pennsylvanian shale, sandstone, coal, and limestone. | High | 12 | 60.7% |
| Glaciated Plateau | Devonian, Mississippian and Permian carbonates and shales. | Moderate | 11 | 39.2% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Columbiana County beside the ground around it
On high-potential ground Columbiana County is close to Ohio as a whole: 60.8% of its land against 62.8%. Of the 7 counties that border it, 4 have more high-potential ground, Jefferson County the most at 100%.
The map rates the ground, not the air in any home.
Local help
Columbiana County, Local resources
Radon testing and mitigation in Columbiana County
Listed radon businesses with an address in Columbiana County:
- Radon Education and Licensing ProgramRadon Education and Licensing Program, run by Ohio Department of Health, licenses or certifies radon professionals and offers free or discounted test kits, and answers questions about testing and mitigation in Ohio.Visit the program’s page(opens in a new tab)
- Free and low-cost kitsThe program says:
Free radon test kits are available for Ohio homeowners.
- Compare kits
- Professionals in Ohio479 professionals are listed in Ohio.
Listed radon professionals by town: Salem, East Palestine
What Ohio's program says
- Phone
- 614-728-0272
- indoor.radon@odh.ohio.gov
- Licensing of radon professionals
This program licenses companies and persons directly involved with the radon testing and mitigation industry.
What it means
Columbiana County, Questions
Questions about radon in Columbiana County
Are radon levels high in Columbiana County?
Over the 2008 to 2017 laboratory totals, 49.1% of the radon tests reported to CDC for Columbiana County, Ohio were at or above 4 pCi/L, and the median reported pre-mitigation result was 3.8 pCi/L. Of 79 Ohio counties with 30 or more tests for the same period, 49 reported a higher share; pooled, the state comes to 52.3%.
Which counties border Columbiana County?
Columbiana County borders 7 counties: Mahoning County, OH, Carroll County, OH, Hancock County, WV, Beaver County, PA, Lawrence County, PA, Jefferson County, OH and Stark County, OH.
Products
Columbiana County, Products
Testing a home in Columbiana County
In Columbiana County, 49.1% of 662 tests reported to CDC over the 2008 to 2017 laboratory totals reached 4 pCi/L, against 52.3% pooled across Ohio. In Zone 1 the year-round level in Columbiana 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
MonitorAEGTEST
HOUND-3786 rechargeable radon monitor with a 3.5-inch color screen
- C-NRPP 2024/25: Not included
- Battery
- Alarm
- Screen
Method: Ion chamber
First reading: Within 10 minutes
Short-term kitFirst Alert
RD1 short-term charcoal radon test kit
- Lab fee included
Method: Charcoal
In home: 2 to 4 days
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Columbiana County is in EPA Zone 1, the highest predicted radon potential. Best radon monitors for Zone 1 counties like Columbiana County
Explore
Columbiana County, Bordering counties
Counties bordering Columbiana County
Calculated by Radon411- Radon levels in Stark County, OHEPA zone 1
60.1%at or above 4 pCi/L
Median 4.9 pCi/L · 3,317 tests · 11.0 points above Columbiana County
- Radon levels in Carroll County, OHEPA zone 1
57.4%at or above 4 pCi/L
Median 4.8 pCi/L · 486 tests · 8.3 points above Columbiana County
- Radon levels in Jefferson County, OHEPA zone 1
49.8%at or above 4 pCi/L
Median 3.9 pCi/L · 271 tests · 0.7 points above Columbiana County
- Radon levels in Beaver County, PAEPA zone 1
49.7%at or above 4 pCi/L
Median 3.9 pCi/L · 2,672 tests · 0.6 points above Columbiana County
- Radon levels in Hancock County, WVEPA zone 1
49.1%at or above 4 pCi/L
Median 3.9 pCi/L · 326 tests · 0.0 points above Columbiana County
- Radon levels in Lawrence County, PAEPA zone 2
42.9%at or above 4 pCi/L
Median 3.3 pCi/L · 1,191 tests · 6.2 points below Columbiana County
- Radon levels in Mahoning County, OHEPA zone 2
23.4%at or above 4 pCi/L
Median 2.5 pCi/L · 666 tests · 25.7 points below Columbiana County
Columbiana County, Cities and towns
Cities and towns in Columbiana County
About 99,377 people live in Columbiana County by the Census Bureau's estimate for July 1, 2025, 2,284 fewer than in 2020 (−2.2%). That works out to 187 people per square mile of land. Salem, the largest place on its list (11,655 residents in all), extends beyond Columbiana County, so no share of the total is worked out for it. CDC's 662 reported tests for 2008 to 2017 work out to 6.7 per 1,000 residents (2025 estimate), close to Ohio's 8.3.
From Salem to Summitville, CDC publishes no figure by town: each reads Columbiana County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Salemextends beyond Columbiana County | 11,655 | −2.0% | Counted whole |
| East Liverpool | 9,569 | −3.6% | 9.6% |
| Columbianaextends beyond Columbiana County | 6,756 | +2.8% | Counted whole |
| East Palestine | 4,613 | −2.7% | 4.6% |
| Minervaextends beyond Columbiana County | 3,697 | +0.2% | Counted whole |
| Wellsville | 3,017 | −3.0% | 3.0% |
| Lisbon | 2,496 | −3.2% | 2.5% |
| Leetonia | 1,769 | −3.0% | 1.8% |
| New Waterford | 1,160 | −2.8% | 1.2% |
| Salineville | 1,149 | −3.2% | 1.2% |
| Washingtonvilleextends beyond Columbiana County | 692 | −2.8% | Counted whole |
| Hanoverton | 341 | −3.1% | 0.3% |
- Rogers
- Summitville
14 incorporated places, as listed in the U.S. Census Bureau’s 2020 place reference files. “(part)” marks a place that extends into another county. Residents: U.S. Census Bureau population estimates for July 1, 2025 (Vintage 2025). A place that extends beyond Columbiana County is counted whole, so it has no share.
Columbiana County, Homes
Homes in Columbiana County
Of Columbiana County's 46,133 homes, 75% are detached houses, against 69% across Ohio; 8% are mobile homes. Half of its homes were built before 1964, close to Ohio's 1970: 46% date from before 1960 and 11% from 2000 or later. 73% of occupied homes are lived in by their owner (Ohio: 67%); in the rest a tenant can run a test, but a fix is the landlord's to make.
| Homes | Columbiana County | Ohio |
|---|---|---|
| Housing units | 46,133 | 5,271,573 |
| Detached houses | 75% | 69% |
| In buildings of 5 or more | 6% | 15% |
| Mobile homes | 8% | 4% |
| Built before 1960 | 46% | 38% |
| Built since 2000 | 11% | 16% |
| Middle year built | 1964 | 1970 |
| Owner-occupied | 73% | 67% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.