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 Daviess County, Indiana
EPA puts Daviess County in Zone 2, its middle radon zone, and 34.5% of its 58 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
34.5%
4.4 pts below IN
- Daviess
- 34.5%
- Indiana
- 38.9%
58 tests, 2008 to 2017
Median result
3.1pCi/L
Below action level
- Daviess
- 3.1 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2008 to 2017
Tests reported
58
61st of 69 by tests
- Daviess
- 58
- 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
54 of 69
Lowest quarter
- Daviess
- 34.5%
- Miami
- 63.3%
By share, of 69 with 30+ tests
Read a result for Daviess County
Starts at Daviess County's median, 3.1 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 3.1 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. Daviess County's median reported result, 2008 to 2017.
The data
Daviess County, At a glance
Daviess County at a glance
Predicted: EPA radon zone
EPA Zone 2: moderate predicted potential
Daviess 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 Daviess County, 2008 to 2017, laboratory
Under 2 pCi/L: 28%2 to 4 pCi/L: 38%4 pCi/L and above: 34%
Of 58 pre-mitigation tests reported to CDC, not homes in this area.
| Result band | Tests Measured | Share Measured |
|---|---|---|
| Under 2 pCi/L | 16 | 27.6% |
| 2 to 4 pCi/L | 22 | 37.9% |
| 4 pCi/L and above | 20 | 34.5% |
What these figures count
These are the 58 tests reported to CDC for Daviess 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).
Daviess County, Compared
Daviess County radon figures, compared
Calculated by Radon411In Daviess County, about 3 in 10 reported tests over the 2008 to 2017 laboratory totals (20 of 58) were at or above EPA's action level. Against the national pool of 35.7%, the gap is 1.2 points lower. Across 92 Indiana counties pooled together, 38.9% of tests reached that level, so Daviess County runs 4.4 points below its state.
Of 3 neighbours with a figure, 2 reported a larger share at or above 4 pCi/L and 1 a smaller one; the spread is 32.7% (Greene County) to 44.1% (Dubois County). By share, Daviess County is 54th of 69 Indiana counties with 30 or more tests for the same period.
Half the tests came in under 3.1 pCi/L and half over it; the single highest reached 30.1 pCi/L. Below the action level, 16 tests (27.6%) came in under 2 pCi/L, against 32.8% statewide, and 22 tests (37.9%) 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 34.5% share point the same way here. USGS geology rates 100% of the county's land moderate radon potential. CDC also counts 7 tests taken after mitigation in Daviess County for the same period: tests in homes where a fix was already in.
CDC's ten-year totals for Daviess County went from 54 tests (2005 to 2014) to 58 (2008 to 2017), the share going from 35.2% to 34.5%.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Daviess County, Geology
The ground under Daviess County
PredictedUSGS's geologic map puts all of Daviess County's mapped land in one class: moderate radon potential. All of it lies in the area the map calls Wabash Lowland, to which USGS gives a radon index of 10, in the moderate band (9 to 11).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Wabash Lowland | Loess, pre-Wisconsinan glacial deposits, Pennsylvanian shale, sandstone, and carbonate bedrock. | Moderate | 10 | 100% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Daviess County beside the ground around it
Across Indiana 56.6% of the land is rated high; none of Daviess County's is. Of the 5 counties that border it, none has as large a share of moderate-potential ground; Greene County comes nearest at 100%.
The map rates the ground, not the air in any home.
Local help
Daviess County, Local resources
Radon testing and mitigation in Daviess 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
Daviess County, Questions
Questions about radon in Daviess County
Are radon levels high in Daviess County?
Over the 2008 to 2017 laboratory totals, 34.5% of the radon tests reported to CDC for Daviess County, Indiana were at or above 4 pCi/L, and the median reported pre-mitigation result was 3.1 pCi/L. Of 69 Indiana counties with 30 or more tests for the same period, 53 reported a higher share; pooled, the state comes to 38.9%.
Which counties border Daviess County?
Daviess County borders 5 counties: Martin County, Knox County, Pike County, Greene County and Dubois County.
Products
Daviess County, Products
Testing a home in Daviess County
In Daviess County, 34.5% of 58 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 Daviess 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
Daviess County, Bordering counties
Counties bordering Daviess County
Calculated by Radon411- Radon levels in Pike CountyEPA zone 2
50.0%at or above 4 pCi/L
Median 3.6 pCi/L · 6 tests · 15.5 points above Daviess County
- Radon levels in Dubois CountyEPA zone 2
44.1%at or above 4 pCi/L
Median 3.7 pCi/L · 136 tests · 9.6 points above Daviess County
- Radon levels in Knox CountyEPA zone 2
43.1%at or above 4 pCi/L
Median 3.4 pCi/L · 58 tests · 8.6 points above Daviess County
- Radon levels in Martin CountyEPA zone 2
37.5%at or above 4 pCi/L
Median 3.7 pCi/L · 8 tests · 3.0 points above Daviess County
- Radon levels in Greene CountyEPA zone 2
32.7%at or above 4 pCi/L
Median 3.0 pCi/L · 49 tests · 1.8 points below Daviess County
Daviess County, Cities and towns
Cities and towns in Daviess County
The Census Bureau estimates 34,209 residents in Daviess County for July 1, 2025, 849 more than in 2020 (+2.5%). That works out to 80 people per square mile of land. Its largest town, Washington, has 12,991 residents, 38.0% of the total. Together its 7 incorporated places hold 48.2% of those residents; the other 51.8% live outside any of them. Reported testing is thin here: 58 tests over 2008 to 2017, or 1.7 for every 1,000 residents (2025 estimate), where Indiana as a whole comes to 6.2.
From Washington to Alfordsville, CDC publishes no figure by town: each reads Daviess County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Washington | 12,991 | +7.9% | 38.0% |
| Odon | 1,378 | −0.7% | 4.0% |
| Montgomery | 782 | −0.8% | 2.3% |
| Elnora | 627 | −0.8% | 1.8% |
| Plainville | 485 | −1.0% | 1.4% |
| Cannelburg | 174 | −0.6% | 0.5% |
| Alfordsville | 66 | Level | 0.2% |
7 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).
Daviess County, Homes
Homes in Daviess County
Daviess County is a place of houses on their own lots: 80% of its 12,781 homes are detached single-family houses, against 73% across Indiana. Half of its homes were built before 1974, close to Indiana's 1976: 35% date from before 1960 and 23% from 2000 or later. 72% of occupied homes are lived in by their owner (Indiana: 70%); in the rest a tenant can run a test, but a fix is the landlord's to make.
| Homes | Daviess County | Indiana |
|---|---|---|
| Housing units | 12,781 | 2,953,344 |
| Detached houses | 80% | 73% |
| In buildings of 5 or more | 6% | 13% |
| Mobile homes | 9% | 4% |
| Built before 1960 | 35% | 32% |
| Built since 2000 | 23% | 21% |
| Middle year built | 1974 | 1976 |
| Owner-occupied | 72% | 70% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.