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 Owen County, Indiana
EPA puts Owen County in Zone 2, its middle radon zone, and 39.1% of its 110 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
39.1%
0.2 pts above IN
- Owen
- 39.1%
- Indiana
- 38.9%
110 tests, 2008 to 2017
Median result
2.8pCi/L
Below action level
- Owen
- 2.8 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2008 to 2017
Tests reported
110
44th of 69 by tests
- Owen
- 110
- St. Joseph
- 7,346
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 Indiana
46 of 69
Middle half
- Owen
- 39.1%
- Miami
- 63.3%
By share, of 69 with 30+ tests
Read a result for Owen County
Starts at Owen County's median, 2.8 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 2.8 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. Owen County's median reported result, 2008 to 2017.
The data
Owen County, At a glance
Owen County at a glance
Predicted: EPA radon zone
EPA Zone 2: moderate predicted potential
Owen 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 Owen County, 2008 to 2017, laboratory
Under 2 pCi/L: 30%2 to 4 pCi/L: 31%4 pCi/L and above: 39%
Of 110 pre-mitigation tests reported to CDC, not homes in this area.
| Result band | Tests Measured | Share Measured |
|---|---|---|
| Under 2 pCi/L | 33 | 30.0% |
| 2 to 4 pCi/L | 34 | 30.9% |
| 4 pCi/L and above | 43 | 39.1% |
What these figures count
These are the 110 tests reported to CDC for Owen 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).
Owen County, Compared
Owen County radon figures, compared
Calculated by Radon411In Owen County, about 4 in 10 reported tests over the 2008 to 2017 laboratory totals (43 of 110) were at or above EPA's action level. Against the national pool of 35.7%, the gap is 3.4 points higher. Across 92 Indiana counties pooled together, 38.9% of tests reached that level, so Owen County runs 0.2 points above its state.
Of 4 neighbours with a figure, 1 reported a larger share at or above 4 pCi/L and 3 a smaller one; the spread is 32.7% (Greene County) to 44.2% (Morgan County). By share, Owen County is 46th of 69 Indiana counties with 30 or more tests for the same period.
Half the tests came in under 2.8 pCi/L and half over it; the single highest reached 20.0 pCi/L. Below the action level, 33 tests (30.0%) came in under 2 pCi/L, against 32.8% statewide, and 34 tests (30.9%) fell between 2 and 4, against 28.3% statewide.
Zone 2 on EPA's map (predicted average between 2 and 4 pCi/L) and a 39.1% share point the same way here. USGS geology rates 100% of the county's land moderate radon potential.
CDC's ten-year totals for Owen County went from 85 tests (2005 to 2014) to 110 (2008 to 2017), the share going from 38.8% to 39.1%.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Owen County, Geology
The ground under Owen County
PredictedUSGS's geologic map puts all of Owen County's mapped land in one class: moderate radon potential. The map puts 65.3% of Owen County in the area it calls Crawford Upland/Mitchell Plain/Norman Upland and 34.7% in Wabash Lowland. USGS gives the first a radon index of 11 and the second 10, both in the moderate band (9 to 11).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Crawford Upland/Mitchell Plain/Norman Upland | Unglaciated, underlain by karsted Mississippian carbonate rocks. | Moderate | 11 | 65.3% |
| Wabash Lowland | Loess, pre-Wisconsinan glacial deposits, Pennsylvanian shale, sandstone, and carbonate bedrock. | Moderate | 10 | 34.7% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Owen County beside the ground around it
Across Indiana 56.6% of the land is rated high; none of Owen County's is. Of the 5 counties that border it, 2 have more high-potential ground, Putnam County the most at 70.0%.
The map rates the ground, not the air in any home.
Local help
Owen County, Local resources
Radon testing and mitigation in Owen County
- Indiana's radon programIndiana Department of HealthIndiana's radon program licenses or certifies radon professionals and offers free or discounted test kits, and answers questions about testing and mitigation in Indiana.Visit the program’s page(opens in a new tab)
- Free and low-cost kitsThe program says:
To purchase a low-cost radon short term or long term test kit, please visit the American Lung Association
- Compare kits
- Professionals in Indiana17 professionals are listed in Indiana.
What Indiana's program says
- Phone
- 1-800-272-9723
- Licensing of radon professionals
According to the Indiana Radon Rule, 410 IAC 5.1, everyone who is serving Indiana by doing radon testing, analysis and mitigation (radon reduction) in residential structures must be certified by the Indiana State Department of Health.
What it means
Owen County, Questions
Questions about radon in Owen County
Are radon levels high in Owen County?
Over the 2008 to 2017 laboratory totals, 39.1% of the radon tests reported to CDC for Owen County, Indiana were at or above 4 pCi/L, and the median reported pre-mitigation result was 2.8 pCi/L. Of 69 Indiana counties with 30 or more tests for the same period, 45 reported a higher share; pooled, the state comes to 38.9%.
Which counties border Owen County?
Owen County borders 5 counties: Greene County, Clay County, Monroe County, Morgan County and Putnam County.
Products
Owen County, Products
Testing a home in Owen County
In Owen County, 39.1% of 110 tests reported to CDC over the 2008 to 2017 laboratory totals reached 4 pCi/L, against 38.9% pooled across Indiana. In Zone 2 a short-term kit (2 to 90 days) is the quick first check in Owen 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
RM-65 rechargeable radon detector with a color screen and alarm
- 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
Owen County, Bordering counties
Counties bordering Owen County
Calculated by Radon411- Radon levels in Morgan CountyEPA zone 2
44.2%at or above 4 pCi/L
Median 3.5 pCi/L · 226 tests · 5.1 points above Owen County
- Radon levels in Putnam CountyEPA zone 1
34.5%at or above 4 pCi/L
Median 2.7 pCi/L · 119 tests · 4.6 points below Owen County
- Radon levels in Monroe CountyEPA zone 1
34.2%at or above 4 pCi/L
Median 2.8 pCi/L · 2,375 tests · 4.9 points below Owen County
- Radon levels in Greene CountyEPA zone 2
32.7%at or above 4 pCi/L
Median 3.0 pCi/L · 49 tests · 6.4 points below Owen County
- Radon levels in Clay CountyEPA zone 2
26.1%at or above 4 pCi/L
Median 2.9 pCi/L · 23 tests · 13.0 points below Owen County
Owen County, Cities and towns
Cities and towns in Owen County
The Census Bureau estimates 21,886 residents in Owen County for July 1, 2025, 561 more than in 2020 (+2.6%). That works out to 57 people per square mile of land. No town dominates: Spencer, the largest, has 2,479 residents, 11.3% of the total. Together its 2 incorporated places hold 15.3% of those residents; the other 84.7% live outside any of them. CDC's 110 reported tests for 2008 to 2017 work out to 5.0 per 1,000 residents (2025 estimate), close to Indiana's 6.2.
From Spencer to Gosport, CDC publishes no figure by town: each reads Owen County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Spencer | 2,479 | +0.9% | 11.3% |
| Gosport | 865 | +2.6% | 4.0% |
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).
Owen County, Homes
Homes in Owen County
Owen County is a place of houses on their own lots: 76% of its 9,868 homes are detached single-family houses, against 73% across Indiana. Half of its homes were built before 1979, close to Indiana's 1976: 26% date from before 1960 and 20% from 2000 or later. Owners live in 81% of the occupied homes (Indiana: 70%), so for most households a test and a fix are their own to order.
| Homes | Owen County | Indiana |
|---|---|---|
| Housing units | 9,868 | 2,953,344 |
| Detached houses | 76% | 73% |
| In buildings of 5 or more | 2% | 13% |
| Mobile homes | 18% | 4% |
| Built before 1960 | 26% | 32% |
| Built since 2000 | 20% | 21% |
| Middle year built | 1979 | 1976 |
| Owner-occupied | 81% | 70% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.