Short-term kitKidde
442020 short-term charcoal radon test kit
- Lab fee included
Method: Charcoal
In home: 3 days
Locations and reports
Radon Levels in Sandusky County, Ohio
EPA puts Sandusky County in Zone 2, its middle radon zone, and high results are common there: 59.2% of the 649 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
59.2%
6.9 pts above OH
- Sandusky
- 59.2%
- Ohio
- 52.3%
649 tests, 2008 to 2017
Median result
5.0pCi/L
Action level reached
- Sandusky
- 5.0 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2008 to 2017
Tests reported
649
34th of 79 by tests
- Sandusky
- 649
- Franklin
- 16,142
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 Ohio
29 of 79
Middle half
- Sandusky
- 59.2%
- Pickaway
- 81.4%
By share, of 79 with 30+ tests
Read a result for Sandusky County
Starts at Sandusky County's median, 5.0 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 5.0 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. Sandusky County's median reported result, 2008 to 2017.
The data
Sandusky County, At a glance
Sandusky County at a glance
Predicted: EPA radon zone
EPA Zone 2: moderate predicted potential
Sandusky County is a
USGS geologic potential: Moderate across 53% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Sandusky County, 2008 to 2017, laboratory
Under 2 pCi/L: 20%2 to 4 pCi/L: 21%4 pCi/L and above: 59%
Of 649 pre-mitigation tests reported to CDC, not homes in this area.
| Result band | Tests Measured | Share Measured |
|---|---|---|
| Under 2 pCi/L | 131 | 20.2% |
| 2 to 4 pCi/L | 134 | 20.6% |
| 4 pCi/L and above | 384 | 59.2% |
What these figures count
These are the 649 tests reported to CDC for Sandusky 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).
Sandusky County, Compared
Sandusky County radon figures, compared
Calculated by Radon411More than half: 59.2% of the 649 radon tests reported to CDC for Sandusky County over the 2008 to 2017 laboratory totals read at least 4 pCi/L. That places it 29th of 79 Ohio counties with 30 or more tests for the same period. That is 6.9 points above the 52.3% pooled from 88 Ohio counties.
The median result, 5.0 pCi/L, sits above EPA's 4 pCi/L action level, and the top reported result was 166.6 pCi/L. The rest split 20.2% under 2 pCi/L and 20.6% from 2 to 4 (Ohio: 23.1% and 24.6%). The reported tests do not follow EPA's Zone 2 label for Sandusky County (predicted average between 2 and 4 pCi/L): 59.2% of them reached 4 pCi/L, fewer than that label suggests.
1 of its 5 bordering counties with figures ran higher, led by Huron County at 59.4%; Ottawa County reported 40.3%. Statewide for the same period, Pickaway County reported the highest share (81.4%) and Cuyahoga County the lowest (21.7%).
CDC's ten-year totals for Sandusky County went from 552 tests (2005 to 2014) to 649 (2008 to 2017), the share going from 61.2% to 59.2%.
Nationally, every county with a figure for the same period pools to 35.7%; Sandusky County sits 23.5 points above it. CDC also counts 218 tests taken after mitigation in Sandusky 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.
Sandusky County, Geology
The ground under Sandusky County
PredictedUSGS's geologic map splits Sandusky County: 53.0% of its land is moderate radon potential and 46.5% high. The map puts 53.0% of Sandusky County in the area it calls Lake Plains and 46.5% in Till Plains. USGS gives the first a radon index of 10, in the moderate band (9 to 11), and the second 14, in the high band (12 to 17).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Lake Plains | Glacial lake deposits, Devonian shale and limestone. | Moderate | 10 | 53.0% |
| Till Plains | Glacial deposits underlain by Ordovician through Devonian limestone and shale. | High | 14 | 46.5% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Sandusky County beside the ground around it
Ohio as a whole has more high-potential ground than Sandusky County: 62.8% of its land, against 46.5% here. Of the 5 counties that border it, 3 have more high-potential ground, Seneca County the most at 99.4%.
The map rates the ground, not the air in any home.
Local help
Sandusky County, Local resources
Radon testing and mitigation in Sandusky 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: Bellevue
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
Sandusky County, Questions
Questions about radon in Sandusky County
Are radon levels high in Sandusky County?
Over the 2008 to 2017 laboratory totals, 59.2% of the radon tests reported to CDC for Sandusky County, Ohio were at or above 4 pCi/L, and the median reported pre-mitigation result was 5.0 pCi/L. Of 79 Ohio counties with 30 or more tests for the same period, 28 reported a higher share; pooled, the state comes to 52.3%.
Which counties border Sandusky County?
Sandusky County borders 5 counties: Ottawa County, Seneca County, Erie County, Wood County and Huron County.
Products
Sandusky County, Products
Testing a home in Sandusky County
In Sandusky County, 59.2% of 649 tests reported to CDC over the 2008 to 2017 laboratory totals reached 4 pCi/L, against 52.3% pooled across Ohio. In Zone 2 a short-term kit (2 to 90 days) is the quick first check in Sandusky 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-1085 palm-sized rechargeable radon detector
- 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
Sandusky County, Bordering counties
Counties bordering Sandusky County
Calculated by Radon411- Radon levels in Huron CountyEPA zone 1
59.4%at or above 4 pCi/L
Median 4.9 pCi/L · 796 tests · 0.2 points above Sandusky County
- Radon levels in Seneca CountyEPA zone 1
58.9%at or above 4 pCi/L
Median 4.9 pCi/L · 540 tests · 0.3 points below Sandusky County
- Radon levels in Erie CountyEPA zone 2
54.5%at or above 4 pCi/L
Median 4.4 pCi/L · 1,651 tests · 4.7 points below Sandusky County
- Radon levels in Wood CountyEPA zone 2
45.5%at or above 4 pCi/L
Median 3.5 pCi/L · 1,192 tests · 13.7 points below Sandusky County
- Radon levels in Ottawa CountyEPA zone 2
40.3%at or above 4 pCi/L
Median 2.9 pCi/L · 541 tests · 18.9 points below Sandusky County
Sandusky County, Cities and towns
Cities and towns in Sandusky County
Sandusky County's population has barely moved since 2020: 58,655 residents on July 1, 2025 against 58,880 then, by the Census Bureau's estimates. That works out to 144 people per square mile of land. Its largest town, Fremont, has 15,765 residents, 26.9% of the total. CDC's 649 reported tests for 2008 to 2017 work out to 11.1 per 1,000 residents (2025 estimate), close to Ohio's 8.3.
From Fremont to Burgoon, CDC publishes no figure by town: each reads Sandusky County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Fremont | 15,765 | −0.9% | 26.9% |
| Bellevueextends beyond Sandusky County | 8,154 | −1.1% | Counted whole |
| Clyde | 6,361 | +0.8% | 10.8% |
| Gibsonburg | 2,462 | −1.0% | 4.2% |
| Woodville | 1,976 | −1.3% | 3.4% |
| Elmoreextends beyond Sandusky County | 1,370 | −2.6% | Counted whole |
| Green Springsextends beyond Sandusky County | 1,316 | +1.3% | Counted whole |
| Lindsey | 452 | −0.7% | 0.8% |
| Helena | 208 | −1.9% | 0.4% |
| Burgoon | 177 | −2.2% | 0.3% |
10 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). A place that extends beyond Sandusky County is counted whole, so it has no share.
Sandusky County, Homes
Homes in Sandusky County
Sandusky County is a place of houses on their own lots: 77% of its 26,475 homes are detached single-family houses, against 69% across Ohio. The homes are older than Ohio's as a whole: half were built before 1960 (1970 for Ohio), and 50% date from before 1960. 74% 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 | Sandusky County | Ohio |
|---|---|---|
| Housing units | 26,475 | 5,271,573 |
| Detached houses | 77% | 69% |
| In buildings of 5 or more | 6% | 15% |
| Mobile homes | 5% | 4% |
| Built before 1960 | 50% | 38% |
| Built since 2000 | 9% | 16% |
| Middle year built | 1960 | 1970 |
| Owner-occupied | 74% | 67% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.