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Radon Levels in Dubois County, Indiana

EPA puts Dubois County in Zone 2, its middle radon zone, and high results are common there: 44.1% of the 136 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

How to test this homeFind a certified tester

  • Share at 4+ pCi/L

    44.1%

    5.2 pts above IN

    Dubois
    44.1%
    Indiana
    38.9%

    136 tests, 2008 to 2017

  • Median result

    3.7pCi/L

    Below action level

    Dubois
    3.7 pCi/L
    EPA
    4.0 pCi/L

    Midpoint of the tests, 2008 to 2017

  • Tests reported

    136

    38th of 69 by tests

    Dubois
    136
    St. Joseph
    7,346

    Reported to CDC before any fix, 2008 to 2017

  • EPA radon zone

    Zone 2

    Moderate potential

    1. 1
    2. Zone 2
    3. 3

    1 highest, 3 lowest

    EPA predicts 2 to 4 pCi/L indoors

  • Rank in Indiana

    31 of 69

    Middle half

    Dubois
    44.1%
    Miami
    63.3%

    By share, of 69 with 30+ tests

Read a result for Dubois County

Starts at Dubois County's median, 3.7 pCi/L

3.7pCi/L

EPA’s own thresholds; the figures are the area’s, never this home’s.

EPA’s reading of 3.7 pCi/L

Between 2 and 4 pCi/L

  1. Under 20 to 1.9 pCi/L
  2. 2 to 4consider a fix
  3. 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. Dubois County's median reported result, 2008 to 2017.

Interpret this readingWhat a fix costs

The data

Dubois County, At a glance

Dubois County at a glance

Predicted: EPA radon zone

EPA Zone 2: moderate predicted potential

Dubois County is a county: EPA's forecast for it as a whole is an average indoor of 2 to 4 pCi/L (75 to 150 Bq/m³). It describes no single address, and homes above EPA's are found in every zone, this one included.

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 Dubois County, 2008 to 2017, laboratory

Reported results by concentration band, Dubois County, 2008 to 2017, laboratory
Under 2 pCi/L: 25%2 to 4 pCi/L: 31%4 pCi/L and above: 44%

Of 136 pre-mitigation tests reported to CDC, not homes in this area.

Reported results by concentration band, Dubois County, 2008 to 2017, laboratory: data table
Result bandTests MeasuredShare Measured
Under 2 pCi/L3425.0%
2 to 4 pCi/L4230.9%
4 pCi/L and above6044.1%
What these figures count

These are the 136 tests reported to CDC for Dubois 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).

How to read these figures

Dubois County, Compared

Dubois County radon figures, compared

Calculated by Radon411

In Dubois County, about 4 in 10 reported tests over the 2008 to 2017 laboratory totals (60 of 136) were at or above EPA's action level. Against the national pool of 35.7%, the gap is 8.4 points higher. Across 92 Indiana counties pooled together, 38.9% of tests reached that level, so Dubois County runs 5.2 points above its state.

Of 2 neighbours with a figure, none reported a larger share at or above 4 pCi/L; the spread is 20.9% (Warrick County) to 34.5% (Daviess County). By share, Dubois County is 31st of 69 Indiana counties with 30 or more tests for the same period.

Half the tests came in under 3.7 pCi/L and half over it; the single highest reached 19.9 pCi/L. Below the action level, 34 tests (25.0%) came in under 2 pCi/L, against 32.8% statewide, and 42 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 44.1% share point the same way here. USGS geology rates 100% of the county's land moderate radon potential. CDC also counts 5 tests taken after mitigation in Dubois County for the same period: tests in homes where a fix was already in.

CDC's ten-year totals for Dubois County went from 110 tests (2005 to 2014) to 136 (2008 to 2017), the share going from 45.5% to 44.1%.

Dubois County against Indiana, the United States and nearby counties, 2008 to 2017, laboratory
AreaTestsAt or above 4 pCi/LMedianDifference from Dubois County
Dubois County13644.1%3.7 pCi/LThis county
Indiana, pooled92 counties, pooled43,14838.9%Not pooled−5.2 points
United States, pooled2,661 counties, pooled2,013,54435.7%Not pooled−8.4 points
Miami Countyhighest in the state3063.3%5.3 pCi/L+19.2 points
Jasper Countylowest in the state7114.1%1.2 pCi/L−30.0 points
Spencer County, INborders it2560.0%4.5 pCi/L+15.9 points
Pike County, INborders it650.0%3.6 pCi/L+5.9 points
Orange County, INborders it2343.5%2.9 pCi/L−0.6 points
Martin County, INborders it837.5%3.7 pCi/L−6.6 points
Daviess County, INborders it5834.5%3.1 pCi/L−9.6 points
Crawford County, INborders it1030.0%2.7 pCi/L−14.1 points
Perry County, INborders it2623.1%2.3 pCi/L−21.0 points
Warrick County, INborders it56120.9%1.8 pCi/L−23.2 points
Where Dubois County's reported results fell, 2008 to 2017, laboratory, beside Indiana and the United States
ResultDubois County testsDubois County shareIndiana shareU.S. shareAgainst Indiana
Under 2 pCi/L3425.0%32.8%39.6%−7.8 points
2 to 4 pCi/L4230.9%28.3%24.7%+2.6 points
4 pCi/L and above6044.1%38.9%35.7%+5.2 points
Dubois County ranked among the 69 Indiana counties with 30 or more tests, by share at or above 4 pCi/L, 2008 to 2017, laboratory
CountyRankTestsAt or above 4 pCi/LMedian
Fulton County26 of 699746.4%3.3 pCi/L
Elkhart County27 of 692,85646.4%3.7 pCi/L
Clinton County28 of 698545.9%3.5 pCi/L
Jefferson County29 of 697245.8%3.1 pCi/L
Morgan County30 of 6922644.2%3.5 pCi/L
Dubois County31 of 6913644.1%3.7 pCi/L
Vigo County32 of 6945544.0%3.6 pCi/L
Huntington County33 of 6916943.8%3.5 pCi/L
Gibson County34 of 6912043.3%3.4 pCi/L
Knox County35 of 695843.1%3.4 pCi/L
Floyd County36 of 6931642.4%3.3 pCi/L
Dubois County ten-year laboratory totals, against Indiana's pooled share
PeriodTestsAt or above 4 pCi/LMedianHighestIndiana, pooledChange from the row before
2008 to 201713644.1%3.7 pCi/L19.9 pCi/L38.9%−3.3 points
2007 to 201613347.4%3.9 pCi/L19.9 pCi/L39.2%+2.3 points
2006 to 201512245.1%3.6 pCi/L18.5 pCi/L39.6%−0.4 points
2005 to 201411045.5%3.7 pCi/L18.5 pCi/L39.3%First on file

Pooled shares: Radon411's sum of CDC's county counts for one period.

Dubois County, Geology

The ground under Dubois County

Predicted

USGS's geologic map puts all of Dubois County's mapped land in one class: moderate radon potential. 95.6% 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).

USGS's geologic areas under Dubois County
AreaThe rock, in USGS's wordsPotentialRadon indexShare of land
Wabash LowlandLoess, pre-Wisconsinan glacial deposits, Pennsylvanian shale, sandstone, and carbonate bedrock.Moderate1095.6%
Crawford Upland/Mitchell Plain/Norman UplandUnglaciated, underlain by karsted Mississippian carbonate rocks.Moderate114.4%

Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.

Dubois County beside the ground around it

Across Indiana 56.6% of the land is rated high; none of Dubois County's is. Of the 8 counties that border it, none has as large a share of moderate-potential ground; Crawford County comes nearest at 100%.

Share of land by USGS radon potential: Dubois County, the 8 counties bordering it and Indiana
AreaEPA zoneLow potentialModerate potentialHigh potential
Dubois CountyZone 2None100%None
Pike CountyZone 2None100%None
Perry CountyZone 2None100%None
Spencer CountyZone 2None100%None
Crawford CountyZone 2None100%None
Warrick CountyZone 2None100%None
Orange CountyZone 1None100%None
Daviess CountyZone 2None100%None
Martin CountyZone 2None100%None
Indiana92 counties, pooled by land areaVariesNone43.4%56.6%

The map rates the ground, not the air in any home.

Local help

Dubois County, Local resources

Radon testing and mitigation in Dubois County

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

Dubois County, Questions

Questions about radon in Dubois County

Are radon levels high in Dubois County?

Over the 2008 to 2017 laboratory totals, 44.1% of the radon tests reported to CDC for Dubois County, Indiana were at or above 4 pCi/L, and the median reported pre-mitigation result was 3.7 pCi/L. Of 69 Indiana counties with 30 or more tests for the same period, 30 reported a higher share; pooled, the state comes to 38.9%.

Which counties border Dubois County?

Dubois County borders 8 counties: Pike County, Perry County, Spencer County, Crawford County, Warrick County, Orange County, Daviess County and Martin County.

Products

Dubois County, Products

Testing a home in Dubois County

In Dubois County, 44.1% of 136 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 Dubois County; a long-term test tells the year-round average.

Test kits and monitors3

See every kit and monitor

Best radon monitors for Dubois County homes, compared

Explore

Dubois County, Bordering counties

Counties bordering Dubois County

Calculated by Radon411

Dubois County, Cities and towns

Cities and towns in Dubois County

The Census Bureau estimates 44,016 residents in Dubois County for July 1, 2025, 376 more than in 2020 (+0.9%). That works out to 103 people per square mile of land. Its largest town, Jasper, has 17,279 residents, 39.3% of the total. Together its 5 incorporated places hold 61.5% of those residents; the other 38.5% live outside any of them. Reported testing is thin here: 136 tests over 2008 to 2017, or 3.1 for every 1,000 residents (2025 estimate), where Indiana as a whole comes to 6.2.

From Jasper to Birdseye, CDC publishes no figure by town: each reads Dubois County's.

The cities and towns in Dubois County by residents, July 1, 2025
PlaceResidentsSince 2020Share of residents
Jasper17,279+3.3%39.3%
Huntingburg6,522+2.0%14.8%
Ferdinand2,247+4.1%5.1%
Holland606−2.6%1.4%
Birdseye415−1.2%0.9%

5 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).

Dubois County, Homes

Homes in Dubois County

Dubois County is a place of houses on their own lots: 79% of its 18,715 homes are detached single-family houses, against 73% across Indiana. Half of its homes were built before 1981, close to Indiana's 1976: 28% date from before 1960 and 20% from 2000 or later. Owners live in 76% of the occupied homes (Indiana: 70%), so for most households a test and a fix are their own to order.

Homes in Dubois County, Indiana, 2019 to 2023
HomesDubois CountyIndiana
Housing units18,7152,953,344
Detached houses79%73%
In buildings of 5 or more7%13%
Mobile homes4%4%
Built before 196028%32%
Built since 200020%21%
Middle year built19811976
Owner-occupied76%70%

Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.