Skip to content
RADON411

Locations and reports

Radon Levels in Jackson County, Indiana

EPA puts Jackson County in Zone 2, its middle radon zone, and 27.3% of its 88 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

How to test this homeFind a certified tester

  • Share at 4+ pCi/L

    27.3%

    11.6 pts below IN

    Jackson
    27.3%
    Indiana
    38.9%

    88 tests, 2008 to 2017

  • Median result

    2.8pCi/L

    Below action level

    Jackson
    2.8 pCi/L
    EPA
    4.0 pCi/L

    Midpoint of the tests, 2008 to 2017

  • Tests reported

    88

    49th of 69 by tests

    Jackson
    88
    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

    64 of 69

    Lowest quarter

    Jackson
    27.3%
    Miami
    63.3%

    By share, of 69 with 30+ tests

Read a result for Jackson County

Starts at Jackson County's median, 2.8 pCi/L

2.8pCi/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

  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. Jackson County's median reported result, 2008 to 2017.

Interpret this readingWhat a fix costs

The data

Jackson County, At a glance

Jackson County at a glance

Predicted: EPA radon zone

EPA Zone 2: moderate predicted potential

Jackson 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 80% of the county's area

Predicted: EPA Map of Radon Zones

Measured: tests reported to CDC

Radon tests reported for Jackson County, 2008 to 2017, laboratory

Reported results by concentration band, Jackson County, 2008 to 2017, laboratory
Under 2 pCi/L: 32%2 to 4 pCi/L: 41%4 pCi/L and above: 27%

Of 88 pre-mitigation tests reported to CDC, not homes in this area.

Reported results by concentration band, Jackson County, 2008 to 2017, laboratory: data table
Result bandTests MeasuredShare Measured
Under 2 pCi/L2831.8%
2 to 4 pCi/L3640.9%
4 pCi/L and above2427.3%
What these figures count

These are the 88 tests reported to CDC for Jackson 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

Jackson County, Compared

Jackson County radon figures, compared

Calculated by Radon411

Jackson County's 88 reported tests over the 2008 to 2017 laboratory totals had a middle value of 2.8 pCi/L and a maximum of 40.0 pCi/L, and 27.3% reached 4 pCi/L. Indiana as a whole (92 Indiana counties, pooled) comes to 38.9%: 11.6 points higher than here.

Among its state's counties it ranks 64th of 69 Indiana counties with 30 or more tests for the same period. Statewide for the same period, Miami County reported the highest share (63.3%) and Jasper County the lowest (14.1%).

Below the action level, 28 tests (31.8%) came in under 2 pCi/L, against 32.8% statewide, and 36 tests (40.9%) fell between 2 and 4, against 28.3% statewide. CDC's ten-year totals for Jackson County went from 44 tests (2005 to 2014) to 88 (2008 to 2017), the share going from 34.1% to 27.3%.

EPA's 1993 zone map puts Jackson County in Zone 2, a predicted county average between 2 and 4 pCi/L. USGS geology rates 80% of the county's land moderate radon potential.

Next door, the shares run from 25.9% in Brown County to 48.7% in Bartholomew County, with Brown County below Jackson County.

Jackson County against Indiana, the United States and nearby counties, 2008 to 2017, laboratory
AreaTestsAt or above 4 pCi/LMedianDifference from Jackson County
Jackson County8827.3%2.8 pCi/LThis county
Indiana, pooled92 counties, pooled43,14838.9%Not pooled+11.6 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+36.0 points
Jasper Countylowest in the state7114.1%1.2 pCi/L−13.2 points
Bartholomew County, INborders it1,70748.7%3.9 pCi/L+21.4 points
Washington County, INborders it3842.1%3.5 pCi/L+14.8 points
Lawrence County, INborders it26735.6%2.7 pCi/L+8.3 points
Scott County, INborders it1735.3%2.0 pCi/L+8.0 points
Jennings County, INborders it5735.1%2.8 pCi/L+7.8 points
Monroe County, INborders it2,37534.2%2.8 pCi/L+6.9 points
Brown County, INborders it11225.9%2.8 pCi/L−1.4 points
Where Jackson County's reported results fell, 2008 to 2017, laboratory, beside Indiana and the United States
ResultJackson County testsJackson County shareIndiana shareU.S. shareAgainst Indiana
Under 2 pCi/L2831.8%32.8%39.6%−1.0 points
2 to 4 pCi/L3640.9%28.3%24.7%+12.6 points
4 pCi/L and above2427.3%38.9%35.7%−11.6 points
Jackson 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
Decatur County59 of 696333.3%2.8 pCi/L
Greene County60 of 694932.7%3.0 pCi/L
Dearborn County61 of 6913630.1%2.6 pCi/L
St. Joseph County62 of 697,34629.3%2.7 pCi/L
Franklin County63 of 695028.0%2.1 pCi/L
Jackson County64 of 698827.3%2.8 pCi/L
Brown County65 of 6911225.9%2.8 pCi/L
Vanderburgh County66 of 691,50524.4%2.4 pCi/L
Lake County67 of 691,19823.5%1.8 pCi/L
Warrick County68 of 6956120.9%1.8 pCi/L
Jasper County69 of 697114.1%1.2 pCi/L
Jackson County ten-year laboratory totals, against Indiana's pooled share
PeriodTestsAt or above 4 pCi/LMedianHighestIndiana, pooledChange from the row before
2008 to 20178827.3%2.8 pCi/L40.0 pCi/L38.9%Level
2007 to 20167727.3%2.9 pCi/L40.0 pCi/L39.2%−3.2 points
2006 to 20155930.5%2.9 pCi/L40.0 pCi/L39.6%−3.6 points
2005 to 20144434.1%3.0 pCi/L40.0 pCi/L39.3%First on file

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

Jackson County, Geology

The ground under Jackson County

Predicted

Most of the ground under Jackson County is one class on USGS's geologic map: 79.6% of its land is moderate radon potential, with 20.4% high. The map puts 79.6% of Jackson County in the area it calls Crawford Upland/Mitchell Plain/Norman Upland and 20.4% in New Albany Shale. USGS gives the first a radon index of 11, in the moderate band (9 to 11), and the second 12, in the high band (12 to 17).

USGS's geologic areas under Jackson County
AreaThe rock, in USGS's wordsPotentialRadon indexShare of land
Crawford Upland/Mitchell Plain/Norman UplandUnglaciated, underlain by karsted Mississippian carbonate rocks.Moderate1179.6%
New Albany ShaleNew Albany black shale.High1220.4%

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

Jackson County beside the ground around it

Indiana as a whole has more high-potential ground than Jackson County: 56.6% of its land, against 20.4% here. Of the 7 counties that border it, 3 have more high-potential ground, Bartholomew County the most at 70.7%.

Share of land by USGS radon potential: Jackson County, the 7 counties bordering it and Indiana
AreaEPA zoneLow potentialModerate potentialHigh potential
Jackson CountyZone 2None79.6%20.4%
Washington CountyZone 1None100%None
Brown CountyZone 2None99.3%0.7%
Scott CountyZone 1None38.4%61.6%
Jennings CountyZone 1None44.3%55.7%
Lawrence CountyZone 1None100%None
Bartholomew CountyZone 1None29.3%70.7%
Monroe CountyZone 1None100%None
Indiana92 counties, pooled by land areaVariesNone43.4%56.6%

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

Local help

Jackson County, Local resources

Radon testing and mitigation in Jackson 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

Jackson County, Questions

Questions about radon in Jackson County

Are radon levels high in Jackson County?

Over the 2008 to 2017 laboratory totals, 27.3% of the radon tests reported to CDC for Jackson 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, 63 reported a higher share; pooled, the state comes to 38.9%.

Which counties border Jackson County?

Jackson County borders 7 counties: Washington County, Brown County, Scott County, Jennings County, Lawrence County, Bartholomew County and Monroe County.

Products

Jackson County, Products

Testing a home in Jackson County

In Jackson County, 27.3% of 88 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 Jackson County; a long-term test tells the year-round average.

Test kits and monitors3

See every kit and monitor

Best radon monitors for Jackson County homes, compared

Explore

Jackson County, Bordering counties

Counties bordering Jackson County

Calculated by Radon411

Jackson County, Cities and towns

Cities and towns in Jackson County

The Census Bureau estimates 47,370 residents in Jackson County for July 1, 2025, 902 more than in 2020 (+1.9%). That works out to 93 people per square mile of land. Its largest town, Seymour, has 22,450 residents, 47.4% of the total. Together its 4 incorporated places hold 58.6% of those residents; the other 41.4% live outside any of them. Reported testing is thin here: 88 tests over 2008 to 2017, or 1.9 for every 1,000 residents (2025 estimate), where Indiana as a whole comes to 6.2.

From Seymour to Medora, CDC publishes no figure by town: each reads Jackson County's.

The cities and towns in Jackson County by residents, July 1, 2025
PlaceResidentsSince 2020Share of residents
Seymour22,450+1.8%47.4%
Brownstown3,154+4.4%6.7%
Crothersville1,506+0.1%3.2%
Medora641Level1.4%

4 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).

Jackson County, Homes

Homes in Jackson County

Of Jackson County's 19,231 homes, 71% are detached houses, against 73% across Indiana; 11% are mobile homes. Half of its homes were built before 1978, close to Indiana's 1976: 29% date from before 1960 and 21% from 2000 or later. 73% 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 in Jackson County, Indiana, 2019 to 2023
HomesJackson CountyIndiana
Housing units19,2312,953,344
Detached houses71%73%
In buildings of 5 or more10%13%
Mobile homes11%4%
Built before 196029%32%
Built since 200021%21%
Middle year built19781976
Owner-occupied73%70%

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