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Radon Levels in Jackson County, Michigan

EPA puts Jackson County in Zone 1, its highest radon zone, and high results are common there: 49.7% of the 2,964 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

    49.7%

    22.8 pts above MI

    Jackson
    49.7%
    Michigan
    26.9%

    2,964 tests, 2008 to 2017

  • Median result

    3.9pCi/L

    Below action level

    Jackson
    3.9 pCi/L
    EPA
    4.0 pCi/L

    Midpoint of the tests, 2008 to 2017

  • Tests reported

    2,964

    10th of 82 by tests

    Jackson
    2,964
    Oakland
    16,224

    Reported to CDC before any fix, 2008 to 2017

  • EPA radon zone

    Zone 1

    Highest potential

    1. Zone 1
    2. 2
    3. 3

    1 highest, 3 lowest

    EPA predicts over 4 pCi/L indoors

  • Rank in Michigan

    4 of 82

    Top quarter

    Jackson
    49.7%
    Lenawee
    56.7%

    By share, of 82 with 30+ tests

Read a result for Jackson County

Starts at Jackson County's median, 3.9 pCi/L

3.9pCi/L

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

EPA’s reading of 3.9 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 1: highest predicted potential

EPA puts all of Jackson County in and predicts an average indoor of greater than 4 pCi/L (greater than 150 Bq/m³) across the county. That is one forecast for the whole county, not a reading of any address in it; homes above EPA's turn up in all three zones.

USGS geologic potential: High across 91% 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: 25%2 to 4 pCi/L: 25%4 pCi/L and above: 50%

Of 2,964 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/L74125.0%
2 to 4 pCi/L75025.3%
4 pCi/L and above1,47349.7%
What these figures count

These are the 2,964 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

In Jackson County, about 5 in 10 reported tests over the 2008 to 2017 laboratory totals (1,473 of 2,964) were at or above EPA's action level. Against the national pool of 35.7%, the gap is 14.0 points higher. Across 83 Michigan counties pooled together, 26.9% of tests reached that level, so Jackson County runs 22.8 points above its state.

Of 7 neighbours with a figure, 2 reported a larger share at or above 4 pCi/L and 5 a smaller one; the spread is 24.9% (Ingham County) to 56.7% (Lenawee County). By share, Jackson County is 4th of 82 Michigan counties with 30 or more tests for the same period.

Half the tests came in under 3.9 pCi/L and half over it; the single highest reached 93.5 pCi/L. Below the action level, 741 tests (25.0%) came in under 2 pCi/L, against 46.4% statewide, and 750 tests (25.3%) fell between 2 and 4, against 26.7% statewide.

Zone 1 on EPA's map (predicted average above 4 pCi/L) and a 49.7% share point the same way here. USGS geology rates 91% of the county's land high radon potential. CDC also counts 317 tests taken after mitigation in Jackson County for the same period: tests in homes where a fix was already in.

CDC's ten-year totals for Jackson County went from 2,732 tests (2005 to 2014) to 2,964 (2008 to 2017), the share going from 49.5% to 49.7%.

Jackson County against Michigan, the United States and nearby counties, 2008 to 2017, laboratory
AreaTestsAt or above 4 pCi/LMedianDifference from Jackson County
Jackson County2,96449.7%3.9 pCi/LThis county
Michigan, pooled83 counties, pooled114,40726.9%Not pooled−22.8 points
United States, pooled2,661 counties, pooled2,013,54435.7%Not pooled−14.0 points
Branch Countyhighest in the state1,04855.4%4.4 pCi/L+5.7 points
Muskegon Countylowest in the state6293.2%1.2 pCi/L−46.5 points
Lenawee County, MIborders it1,90756.7%4.6 pCi/L+7.0 points
Hillsdale County, MIborders it2,08654.8%4.4 pCi/L+5.1 points
Livingston County, MIborders it4,88543.1%3.4 pCi/L−6.6 points
Washtenaw County, MIborders it8,50041.3%3.2 pCi/L−8.4 points
Calhoun County, MIborders it1,64936.4%3.0 pCi/L−13.3 points
Eaton County, MIborders it3,41134.4%2.8 pCi/L−15.3 points
Ingham County, MIborders it2,93224.9%2.2 pCi/L−24.8 points
Where Jackson County's reported results fell, 2008 to 2017, laboratory, beside Michigan and the United States
ResultJackson County testsJackson County shareMichigan shareU.S. shareAgainst Michigan
Under 2 pCi/L74125.0%46.4%39.6%−21.4 points
2 to 4 pCi/L75025.3%26.7%24.7%−1.4 points
4 pCi/L and above1,47349.7%26.9%35.7%+22.8 points
Jackson County ranked among the 82 Michigan counties with 30 or more tests, by share at or above 4 pCi/L, 2008 to 2017, laboratory
CountyRankTestsAt or above 4 pCi/LMedian
Lenawee County1 of 821,90756.7%4.6 pCi/L
Branch County2 of 821,04855.4%4.4 pCi/L
Hillsdale County3 of 822,08654.8%4.4 pCi/L
Jackson County4 of 822,96449.7%3.9 pCi/L
Livingston County5 of 824,88543.1%3.4 pCi/L
Washtenaw County6 of 828,50041.3%3.2 pCi/L
Dickinson County7 of 8284339.3%3.1 pCi/L
Clinton County8 of 822,31338.5%3.1 pCi/L
Otsego County9 of 821,08038.2%3.2 pCi/L
Ionia County10 of 821,39136.8%2.9 pCi/L
Calhoun County11 of 821,64936.4%3.0 pCi/L
Jackson County ten-year laboratory totals, against Michigan's pooled share
PeriodTestsAt or above 4 pCi/LMedianHighestMichigan, pooledChange from the row before
2008 to 20172,96449.7%3.9 pCi/L93.5 pCi/L26.9%−0.3 points
2007 to 20162,84250.0%3.9 pCi/L93.5 pCi/L26.8%+0.7 points
2006 to 20152,94149.3%3.9 pCi/L93.5 pCi/L26.8%−0.2 points
2005 to 20142,73249.5%3.9 pCi/L93.5 pCi/L26.2%First on file

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

Jackson County, State data

Michigan's own radon test data

Measured

What Michigan's own agencies publish about radon tests in Jackson County, with their period. These are not CDC's figures and are never added to them.

MeasuredState figures, not CDC's

What Michigan EGLE reports for the ZIP codes in Jackson County

Michigan EGLE publishes its figures by ZIP code, not by county. These are the 28 ZIP codes that lie wholly or partly in Jackson County, each with the state's own figures for it. Period: About 10 years to 2026-05-15.

ZIP codes in Jackson County
ZIP codeWhat the state reports
4815862% greater than 4 pCi/L, median 5.5 pCi/L, 138 tests
4882737% greater than 4 pCi/L, median 3.3 pCi/L, 223 tests
4920149% greater than 4 pCi/L, median 3.9 pCi/L, 287 tests
4920237% greater than 4 pCi/L, median 3.3 pCi/L, 51 tests
4920339% greater than 4 pCi/L, median 3.4 pCi/L, 173 tests
4922429% greater than 4 pCi/L, median 2.6 pCi/L, 49 tests
4923055% greater than 4 pCi/L, median 4.3 pCi/L, 100 tests
4923362% greater than 4 pCi/L, median 5.2 pCi/L, 29 tests
4923462% greater than 4 pCi/L, median 5.7 pCi/L, 21 tests
4923750% greater than 4 pCi/L, median 4.0 pCi/L, 14 tests
4924047% greater than 4 pCi/L, median 3.2 pCi/L, 59 tests
4924150% greater than 4 pCi/L, median 4.3 pCi/L, 6 tests
4924533% greater than 4 pCi/L, median 3.4 pCi/L, 21 tests
4924662% greater than 4 pCi/L, median 6.6 pCi/L, 29 tests
4924962% greater than 4 pCi/L, median 5.5 pCi/L, 34 tests
4925052% greater than 4 pCi/L, median 4.6 pCi/L, 88 tests
4925150% greater than 4 pCi/L, median 4.2 pCi/L, 28 tests
4925254% greater than 4 pCi/L, median 4.6 pCi/L, 26 tests
4925456% greater than 4 pCi/L, median 4.3 pCi/L, 18 tests
4925923% greater than 4 pCi/L, median 2.1 pCi/L, 13 tests
492631 tests, figures not shown
4926414% greater than 4 pCi/L, median 1.9 pCi/L, 7 tests
4926938% greater than 4 pCi/L, median 3.2 pCi/L, 29 tests
4927243% greater than 4 pCi/L, median 3.5 pCi/L, 14 tests
4927738% greater than 4 pCi/L, median 3.6 pCi/L, 16 tests
4928359% greater than 4 pCi/L, median 4.6 pCi/L, 37 tests
4928438% greater than 4 pCi/L, median 3.0 pCi/L, 8 tests
4928553% greater than 4 pCi/L, median 4.2 pCi/L, 17 tests
  • EGLE's figures cover first-time tests only, from organizations willing to provide data.
  • EGLE does not publish figures for a ZIP code with fewer than 5 test results.
  • EGLE says the map is not intended to decide whether a home should be tested: all homes should be tested.
  • ZIP code boundaries are postal delivery areas, not legal or administrative boundaries.
  • A ZIP code that crosses the county line is listed whole; its figures cover all of it.

Measured: Michigan EGLE data, About 10 years to 2026-05-15.

Jackson County, Geology

The ground under Jackson County

Predicted

Most of the ground under Jackson County is one class on USGS's geologic map: 90.6% of its land is high radon potential, with 9.4% moderate. The map puts 90.6% of Jackson County in the area it calls Saginaw Lobe Moraine Area and 9.4% in South-Central Michigan Basin. USGS gives the first a radon index of 12, in the high band (12 to 17), and the second 10, in the moderate band (9 to 11).

USGS's geologic areas under Jackson County
AreaThe rock, in USGS's wordsPotentialRadon indexShare of land
Saginaw Lobe Moraine AreaGlacial deposits derived from Sandstone and shale.High1290.6%
South-Central Michigan BasinSandy and silty glacial deposits derived from sandstones, gray shales, limestones, and dolomites.Moderate109.4%

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

Jackson County has more high-potential ground than Michigan as a whole: 90.6% of its land against 9.6%. Of the 7 counties that border it, 1 has more high-potential ground, Hillsdale County the most at 100%.

Share of land by USGS radon potential: Jackson County, the 7 counties bordering it and Michigan
AreaEPA zoneLow potentialModerate potentialHigh potential
Jackson CountyZone 1None9.4%90.6%
Hillsdale CountyZone 1NoneNone100%
Lenawee CountyZone 1None31.4%68.6%
Calhoun CountyZone 1None25.0%75.0%
Ingham CountyZone 2None100%None
Washtenaw CountyZone 1None15.1%84.9%
Eaton CountyZone 2None100%None
Livingston CountyZone 2None53.6%46.4%
Michigan83 counties, pooled by land areaVaries45.0%44.3%9.6%

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

Local help

Jackson County, Local resources

Radon testing and mitigation in Jackson County

Listed radon businesses with an address in Jackson County:

Listed radon professionals by town: Jackson

What Michigan's program says
Phone
800-723-6642
Email
Radon@Michigan.gov
Licensing of radon professionals
Michigan does not license or regulate radon testing and mitigation contractors.

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, 49.7% of the radon tests reported to CDC for Jackson County, Michigan were at or above 4 pCi/L, and the median reported pre-mitigation result was 3.9 pCi/L. Of 82 Michigan counties with 30 or more tests for the same period, 3 reported a higher share; pooled, the state comes to 26.9%.

Which counties border Jackson County?

Jackson County borders 7 counties: Hillsdale County, Lenawee County, Calhoun County, Ingham County, Washtenaw County, Eaton County and Livingston County.

Products

Jackson County, Products

Testing a home in Jackson County

In Jackson County, 49.7% of 2,964 tests reported to CDC over the 2008 to 2017 laboratory totals reached 4 pCi/L, against 26.9% pooled across Michigan. In Zone 1 the year-round level in Jackson County is the one to know: a long-term test (more than 90 days) or a monitor, with a short-term kit for a first answer.

Test kits and monitors3

See every kit and monitor

Jackson County is in EPA Zone 1, the highest predicted radon potential. Best radon monitors for Zone 1 counties like Jackson County

Explore

Jackson County, Bordering counties

Counties bordering Jackson County

Calculated by Radon411

Jackson County, Cities and towns

Cities and towns in Jackson County

Jackson County's population has barely moved since 2020: 159,552 residents on July 1, 2025 against 160,215 then, by the Census Bureau's estimates. That works out to 227 people per square mile of land. No town dominates: Jackson, the largest, has 31,022 residents, 19.4% of the total. Testing is reported here more often than across the state: CDC's 2,964 reported tests for 2008 to 2017 come to 18.6 for every 1,000 residents (2025 estimate), against 11.3 for Michigan.

From Jackson to Cement City, 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
Jackson31,022−0.9%19.4%
Brooklyn1,450+5.8%0.9%
Grass Lake1,098−1.1%0.7%
Concord1,083−0.6%0.7%
Springport821−1.0%0.5%
Parma760−1.4%0.5%
Hanover469−2.1%0.3%
Cement Cityextends beyond Jackson County417−1.4%Counted whole

8 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 Jackson County is counted whole, so it has no share.

Jackson County, Homes

Homes in Jackson County

Jackson County is a place of houses on their own lots: 76% of its 69,188 homes are detached single-family houses, against 72% across Michigan. Half of its homes were built before 1966, close to Michigan's 1972: 42% date from before 1960 and 13% from 2000 or later. Owners live in 75% of the occupied homes (Michigan: 73%), so for most households a test and a fix are their own to order.

Homes in Jackson County, Michigan, 2019 to 2023
HomesJackson CountyMichigan
Housing units69,1884,599,683
Detached houses76%72%
In buildings of 5 or more10%13%
Mobile homes6%5%
Built before 196042%36%
Built since 200013%15%
Middle year built19661972
Owner-occupied75%73%

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