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Radon Levels in Ingham County, Michigan

EPA puts Ingham County in Zone 2, its middle radon zone, and 24.9% of its 2,932 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

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  • Share at 4+ pCi/L

    24.9%

    2.0 pts below MI

    Ingham
    24.9%
    Michigan
    26.9%

    2,932 tests, 2008 to 2017

  • Median result

    2.2pCi/L

    Below action level

    Ingham
    2.2 pCi/L
    EPA
    4.0 pCi/L

    Midpoint of the tests, 2008 to 2017

  • Tests reported

    2,932

    11th of 82 by tests

    Ingham
    2,932
    Oakland
    16,224

    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 Michigan

    24 of 82

    Middle half

    Ingham
    24.9%
    Lenawee
    56.7%

    By share, of 82 with 30+ tests

Read a result for Ingham County

Starts at Ingham County's median, 2.2 pCi/L

2.2pCi/L

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

EPA’s reading of 2.2 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. Ingham County's median reported result, 2008 to 2017.

Interpret this readingWhat a fix costs

The data

Ingham County, At a glance

Ingham County at a glance

Predicted: EPA radon zone

EPA Zone 2: moderate predicted potential

Ingham 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 Ingham County, 2008 to 2017, laboratory

Reported results by concentration band, Ingham County, 2008 to 2017, laboratory
Under 2 pCi/L: 45%2 to 4 pCi/L: 30%4 pCi/L and above: 25%

Of 2,932 pre-mitigation tests reported to CDC, not homes in this area.

Reported results by concentration band, Ingham County, 2008 to 2017, laboratory: data table
Result bandTests MeasuredShare Measured
Under 2 pCi/L1,33245.4%
2 to 4 pCi/L86929.6%
4 pCi/L and above73124.9%
What these figures count

These are the 2,932 tests reported to CDC for Ingham 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

Ingham County, Compared

Ingham County radon figures, compared

Calculated by Radon411

Ingham County's 2,932 reported tests over the 2008 to 2017 laboratory totals had a middle value of 2.2 pCi/L and a maximum of 73.6 pCi/L, and 24.9% reached 4 pCi/L. Michigan as a whole (83 Michigan counties, pooled) comes to 26.9%: 2.0 points higher than here.

Among its state's counties it ranks 24th of 82 Michigan counties with 30 or more tests for the same period. Statewide for the same period, Lenawee County reported the highest share (56.7%) and Muskegon County the lowest (3.2%).

Below the action level, 1,332 tests (45.4%) came in under 2 pCi/L, against 46.4% statewide, and 869 tests (29.6%) fell between 2 and 4, against 26.7% statewide. CDC's ten-year totals for Ingham County went from 2,715 tests (2005 to 2014) to 2,932 (2008 to 2017), the share going from 24.5% to 24.9%.

EPA's 1993 zone map puts Ingham County in Zone 2, a predicted county average between 2 and 4 pCi/L. USGS geology rates 100% of the county's land moderate radon potential.

Next door, the shares run from 31.6% in Shiawassee County to 49.7% in Jackson County.

CDC also counts 419 tests taken after mitigation in Ingham County for the same period: tests in homes where a fix was already in.

Ingham County against Michigan, the United States and nearby counties, 2008 to 2017, laboratory
AreaTestsAt or above 4 pCi/LMedianDifference from Ingham County
Ingham County2,93224.9%2.2 pCi/LThis county
Michigan, pooled83 counties, pooled114,40726.9%Not pooled+2.0 points
United States, pooled2,661 counties, pooled2,013,54435.7%Not pooled+10.8 points
Lenawee Countyhighest in the state1,90756.7%4.6 pCi/L+31.8 points
Muskegon Countylowest in the state6293.2%1.2 pCi/L−21.7 points
Jackson County, MIborders it2,96449.7%3.9 pCi/L+24.8 points
Livingston County, MIborders it4,88543.1%3.4 pCi/L+18.2 points
Clinton County, MIborders it2,31338.5%3.1 pCi/L+13.6 points
Eaton County, MIborders it3,41134.4%2.8 pCi/L+9.5 points
Shiawassee County, MIborders it1,51531.6%2.5 pCi/L+6.7 points
Where Ingham County's reported results fell, 2008 to 2017, laboratory, beside Michigan and the United States
ResultIngham County testsIngham County shareMichigan shareU.S. shareAgainst Michigan
Under 2 pCi/L1,33245.4%46.4%39.6%−1.0 points
2 to 4 pCi/L86929.6%26.7%24.7%+2.9 points
4 pCi/L and above73124.9%26.9%35.7%−2.0 points
Ingham 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
Barry County19 of 821,61530.7%2.6 pCi/L
Cass County20 of 8257230.4%2.6 pCi/L
Monroe County21 of 821,37530.4%2.5 pCi/L
Oakland County22 of 8216,22428.8%2.3 pCi/L
Huron County23 of 8226026.5%1.9 pCi/L
Ingham County24 of 822,93224.9%2.2 pCi/L
Berrien County25 of 821,19224.2%2.0 pCi/L
Montcalm County26 of 8255023.6%2.1 pCi/L
Marquette County27 of 821,08223.4%2.0 pCi/L
Presque Isle County28 of 8250922.8%1.9 pCi/L
Keweenaw County29 of 824422.7%0.9 pCi/L
Ingham County ten-year laboratory totals, against Michigan's pooled share
PeriodTestsAt or above 4 pCi/LMedianHighestMichigan, pooledChange from the row before
2008 to 20172,93224.9%2.2 pCi/L73.6 pCi/L26.9%+0.1 points
2007 to 20162,81824.8%2.2 pCi/L73.6 pCi/L26.8%+0.1 points
2006 to 20152,76924.7%2.2 pCi/L53.1 pCi/L26.8%+0.2 points
2005 to 20142,71524.5%2.2 pCi/L53.1 pCi/L26.2%First on file

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

Ingham County, State data

Michigan's own radon test data

Measured

What Michigan's own agencies publish about radon tests in Ingham 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 Ingham County

Michigan EGLE publishes its figures by ZIP code, not by county. These are the 22 ZIP codes that lie wholly or partly in Ingham County, each with the state's own figures for it. Period: About 10 years to 2026-05-15.

ZIP codes in Ingham County
ZIP codeWhat the state reports
488190% greater than 4 pCi/L, median 0.0 pCi/L, 5 tests
4882130% greater than 4 pCi/L, median 2.6 pCi/L, 79 tests
4882318% greater than 4 pCi/L, median 1.7 pCi/L, 195 tests
488242 tests, figures not shown
4882737% greater than 4 pCi/L, median 3.3 pCi/L, 223 tests
4884022% greater than 4 pCi/L, median 2.1 pCi/L, 91 tests
4884223% greater than 4 pCi/L, median 1.8 pCi/L, 148 tests
4885425% greater than 4 pCi/L, median 2.3 pCi/L, 116 tests
4886417% greater than 4 pCi/L, median 1.8 pCi/L, 163 tests
4887233% greater than 4 pCi/L, median 2.9 pCi/L, 66 tests
4889218% greater than 4 pCi/L, median 1.9 pCi/L, 22 tests
4889519% greater than 4 pCi/L, median 1.9 pCi/L, 85 tests
4890617% greater than 4 pCi/L, median 1.5 pCi/L, 163 tests
4891014% greater than 4 pCi/L, median 1.8 pCi/L, 111 tests
4891121% greater than 4 pCi/L, median 2.2 pCi/L, 121 tests
4891231% greater than 4 pCi/L, median 2.5 pCi/L, 104 tests
4891516% greater than 4 pCi/L, median 1.5 pCi/L, 25 tests
4891716% greater than 4 pCi/L, median 2.1 pCi/L, 400 tests
489330% greater than 4 pCi/L, median 0.8 pCi/L, 12 tests
4925150% greater than 4 pCi/L, median 4.2 pCi/L, 28 tests
4926414% greater than 4 pCi/L, median 1.9 pCi/L, 7 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.

Ingham County, Geology

The ground under Ingham County

Predicted

USGS's geologic map puts all of Ingham County's mapped land in one class: moderate radon potential. All of it lies in the area the map calls South-Central Michigan Basin, to which USGS gives a radon index of 10, in the moderate band (9 to 11).

USGS's geologic areas under Ingham County
AreaThe rock, in USGS's wordsPotentialRadon indexShare of land
South-Central Michigan BasinSandy and silty glacial deposits derived from sandstones, gray shales, limestones, and dolomites.Moderate10100%

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

Ingham County beside the ground around it

Across Michigan 9.6% of the land is rated high; none of Ingham County's is. Of the 5 counties that border it, 2 have more high-potential ground, Jackson County the most at 90.6%.

Share of land by USGS radon potential: Ingham County, the 5 counties bordering it and Michigan
AreaEPA zoneLow potentialModerate potentialHigh potential
Ingham CountyZone 2None100%None
Livingston CountyZone 2None53.6%46.4%
Eaton CountyZone 2None100%None
Clinton CountyZone 26.0%94.0%None
Shiawassee CountyZone 224.1%75.9%None
Jackson CountyZone 1None9.4%90.6%
Michigan83 counties, pooled by land areaVaries45.0%44.3%9.6%

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

Local help

Ingham County, Local resources

Radon testing and mitigation in Ingham County

Listed radon businesses with an address in Ingham County:

Listed radon professionals by town: Lansing

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

Ingham County, Questions

Questions about radon in Ingham County

Are radon levels high in Ingham County?

Over the 2008 to 2017 laboratory totals, 24.9% of the radon tests reported to CDC for Ingham County, Michigan were at or above 4 pCi/L, and the median reported pre-mitigation result was 2.2 pCi/L. Of 82 Michigan counties with 30 or more tests for the same period, 23 reported a higher share; pooled, the state comes to 26.9%.

Which counties border Ingham County?

Ingham County borders 5 counties: Livingston County, Eaton County, Clinton County, Shiawassee County and Jackson County.

Products

Ingham County, Products

Testing a home in Ingham County

In Ingham County, 24.9% of 2,932 tests reported to CDC over the 2008 to 2017 laboratory totals reached 4 pCi/L, against 26.9% pooled across Michigan. In Zone 2 a short-term kit (2 to 90 days) is the quick first check in Ingham County; a long-term test tells the year-round average.

Test kits and monitors3

See every kit and monitor

Best radon monitors for Ingham County homes, compared

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Ingham County, Bordering counties

Counties bordering Ingham County

Calculated by Radon411

Ingham County, Cities and towns

Cities and towns in Ingham County

The Census Bureau estimates 289,709 residents in Ingham County for July 1, 2025, 4,704 more than in 2020 (+1.7%). That works out to 521 people per square mile of land. Lansing, the largest place on its list (113,884 residents in all), extends beyond Ingham County, so no share of the total is worked out for it. CDC's 2,932 reported tests for 2008 to 2017 work out to 10.1 per 1,000 residents (2025 estimate), close to Michigan's 11.3.

From Lansing to Dansville, CDC publishes no figure by town: each reads Ingham County's.

The cities and towns in Ingham County by residents, July 1, 2025
PlaceResidentsSince 2020Share of residents
Lansingextends beyond Ingham County113,884+1.2%Counted whole
East Lansingextends beyond Ingham County49,355+2.8%Counted whole
Mason8,264−0.1%2.9%
Williamston3,810+0.3%1.3%
Leslie1,937+0.1%0.7%
Webberville1,314+0.6%0.5%
Stockbridge1,291+4.3%0.4%
Dansville522−1.5%0.2%

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 Ingham County is counted whole, so it has no share.

Ingham County, Homes

Homes in Ingham County

Of Ingham County's 125,812 homes, 61% are detached houses, against 72% across Michigan; 26% are in buildings of five or more homes. Half of its homes were built before 1971, close to Michigan's 1972: 36% date from before 1960 and 15% from 2000 or later. 60% of occupied homes are lived in by their owner (Michigan: 73%); in the rest a tenant can run a test, but a fix is the landlord's to make.

Homes in Ingham County, Michigan, 2019 to 2023
HomesIngham CountyMichigan
Housing units125,8124,599,683
Detached houses61%72%
In buildings of 5 or more26%13%
Mobile homes3%5%
Built before 196036%36%
Built since 200015%15%
Middle year built19711972
Owner-occupied60%73%

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