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Radon Levels in Crawford County, Michigan

EPA puts Crawford County in Zone 3, its lowest radon zone, and most reported tests there come back low, though 6.2% of 194 (2008 to 2017, laboratory totals) reached 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

    6.2%

    20.7 pts below MI

    Crawford
    6.2%
    Michigan
    26.9%

    194 tests, 2008 to 2017

  • Median result

    1.3pCi/L

    Below action level

    Crawford
    1.3 pCi/L
    EPA
    4.0 pCi/L

    Midpoint of the tests, 2008 to 2017

  • Tests reported

    194

    66th of 82 by tests

    Crawford
    194
    Oakland
    16,224

    Reported to CDC before any fix, 2008 to 2017

  • EPA radon zone

    Zone 3

    Lower potential

    1. 1
    2. 2
    3. Zone 3

    1 highest, 3 lowest

    EPA predicts under 2 pCi/L indoors

  • Rank in Michigan

    79 of 82

    Lowest quarter

    Crawford
    6.2%
    Lenawee
    56.7%

    By share, of 82 with 30+ tests

Read a result for Crawford County

Starts at Crawford County's median, 1.3 pCi/L

1.3pCi/L

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

EPA’s reading of 1.3 pCi/L

Below 2 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 below 2 pCi/L, the level at which EPA says a fix should be considered. Crawford County's median reported result, 2008 to 2017.

Interpret this reading

The data

Crawford County, At a glance

Crawford County at a glance

Predicted: EPA radon zone

EPA Zone 3: lower predicted potential

is EPA's lowest class, and its forecast for Crawford County as a whole is an average indoor of less than 2 pCi/L (less than 75 Bq/m³). A low zone clears no address in it: homes above EPA's turn up in all three zones.

USGS geologic potential: Low across 100% of the county's area

Predicted: EPA Map of Radon Zones

Measured: tests reported to CDC

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

Reported results by concentration band, Crawford County, 2008 to 2017, laboratory
Under 2 pCi/L: 65%2 to 4 pCi/L: 29%4 pCi/L and above: 6%

Of 194 pre-mitigation tests reported to CDC, not homes in this area.

Reported results by concentration band, Crawford County, 2008 to 2017, laboratory: data table
Result bandTests MeasuredShare Measured
Under 2 pCi/L12664.9%
2 to 4 pCi/L5628.9%
4 pCi/L and above126.2%
What these figures count

These are the 194 tests reported to CDC for Crawford 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

Crawford County, Compared

Crawford County radon figures, compared

Calculated by Radon411

Crawford County reports fewer high tests than Michigan overall. 6.2% of its 194 tests over the 2008 to 2017 laboratory totals were at or above 4 pCi/L. That is 20.7 points below the 26.9% pooled from 83 Michigan counties.

Ordered from highest share down, it comes 79th of 82 Michigan counties with 30 or more tests for the same period. Nationally, every county with a figure for the same period pools to 35.7%; Crawford County sits 29.5 points below it.

Next door, the shares run from 12.0% in Antrim County to 38.2% in Otsego County. Zone 3 on EPA's map (predicted average under 2 pCi/L) and a 6.2% share point the same way here.

Half the tests came in under 1.3 pCi/L and half over it; the single highest reached 6.3 pCi/L. The rest split 64.9% under 2 pCi/L and 28.9% from 2 to 4 (Michigan: 46.4% and 26.7%).

CDC's ten-year totals for Crawford County went from 219 tests (2005 to 2014) to 194 (2008 to 2017), the share going from 10.5% to 6.2%.

Crawford County against Michigan, the United States and nearby counties, 2008 to 2017, laboratory
AreaTestsAt or above 4 pCi/LMedianDifference from Crawford County
Crawford County1946.2%1.3 pCi/LThis county
Michigan, pooled83 counties, pooled114,40726.9%Not pooled+20.7 points
United States, pooled2,661 counties, pooled2,013,54435.7%Not pooled+29.5 points
Lenawee Countyhighest in the state1,90756.7%4.6 pCi/L+50.5 points
Muskegon Countylowest in the state6293.2%1.2 pCi/L−3.0 points
Otsego County, MIborders it1,08038.2%3.2 pCi/L+32.0 points
Oscoda County, MIborders it5418.5%2.1 pCi/L+12.3 points
Ogemaw County, MIborders it12015.0%2.0 pCi/L+8.8 points
Missaukee County, MIborders it35014.9%1.6 pCi/L+8.7 points
Montmorency County, MIborders it19114.7%1.6 pCi/L+8.5 points
Roscommon County, MIborders it16612.7%1.0 pCi/L+6.5 points
Kalkaska County, MIborders it20412.7%1.3 pCi/L+6.5 points
Antrim County, MIborders it34312.0%1.5 pCi/L+5.8 points
Where Crawford County's reported results fell, 2008 to 2017, laboratory, beside Michigan and the United States
ResultCrawford County testsCrawford County shareMichigan shareU.S. shareAgainst Michigan
Under 2 pCi/L12664.9%46.4%39.6%+18.5 points
2 to 4 pCi/L5628.9%26.7%24.7%+2.2 points
4 pCi/L and above126.2%26.9%35.7%−20.7 points
Crawford 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
Benzie County72 of 823348.7%1.3 pCi/L
Bay County73 of 826248.5%1.4 pCi/L
Cheboygan County74 of 824658.0%0.8 pCi/L
Newaygo County75 of 824677.9%1.3 pCi/L
Leelanau County76 of 826877.7%1.2 pCi/L
Iosco County77 of 821567.7%0.7 pCi/L
Mason County78 of 824626.3%1.1 pCi/L
Crawford County79 of 821946.2%1.3 pCi/L
Oceana County80 of 823385.9%1.2 pCi/L
Midland County81 of 822,0065.3%1.0 pCi/L
Muskegon County82 of 826293.2%1.2 pCi/L
Crawford County ten-year laboratory totals, against Michigan's pooled share
PeriodTestsAt or above 4 pCi/LMedianHighestMichigan, pooledChange from the row before
2008 to 20171946.2%1.3 pCi/L6.3 pCi/L26.9%−1.3 points
2007 to 20162137.5%1.4 pCi/L10.9 pCi/L26.8%−0.4 points
2006 to 20152037.9%1.4 pCi/L10.9 pCi/L26.8%−2.6 points
2005 to 201421910.5%1.5 pCi/L29.0 pCi/L26.2%First on file

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

Crawford County, State data

Michigan's own radon test data

Measured

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

Michigan EGLE publishes its figures by ZIP code, not by county. These are the 4 ZIP codes that lie wholly or partly in Crawford County, each with the state's own figures for it. Period: About 10 years to 2026-05-15.

ZIP codes in Crawford County
ZIP codeWhat the state reports
486538% greater than 4 pCi/L, median 1.7 pCi/L, 38 tests
4973313% greater than 4 pCi/L, median 1.5 pCi/L, 23 tests
497383% greater than 4 pCi/L, median 1.3 pCi/L, 118 tests
4975626% greater than 4 pCi/L, median 2.7 pCi/L, 31 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.

Crawford County, Geology

The ground under Crawford County

Predicted

USGS's geologic map puts all of Crawford County's mapped land in one class: low radon potential. All of it lies in the area the map calls North-Central Michigan Basin, to which USGS gives a radon index of 8, in the low band (5 to 8).

USGS's geologic areas under Crawford County
AreaThe rock, in USGS's wordsPotentialRadon indexShare of land
North-Central Michigan BasinSandy and silty glacial deposits derived from sandstones, gray shales, limestones, and dolomites.Low8100%

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

Crawford County beside the ground around it

Across Michigan 9.6% of the land is rated high; none of Crawford County's is. Of the 8 counties that border it, 5 have more moderate-potential ground, Montmorency County the most at 97.9%.

Share of land by USGS radon potential: Crawford County, the 8 counties bordering it and Michigan
AreaEPA zoneLow potentialModerate potentialHigh potential
Crawford CountyZone 3100%NoneNone
Otsego CountyZone 236.2%63.8%None
Oscoda CountyZone 383.5%16.5%None
Kalkaska CountyZone 394.9%5.1%None
Roscommon CountyZone 3100%NoneNone
Montmorency CountyZone 22.1%97.9%None
Antrim CountyZone 222.4%77.6%None
Ogemaw CountyZone 3100%NoneNone
Missaukee CountyZone 3100%NoneNone
Michigan83 counties, pooled by land areaVaries45.0%44.3%9.6%

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

Local help

Crawford County, Local resources

Radon testing and mitigation in Crawford County

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

Crawford County, Questions

Questions about radon in Crawford County

Are radon levels high in Crawford County?

Over the 2008 to 2017 laboratory totals, 6.2% of the radon tests reported to CDC for Crawford County, Michigan were at or above 4 pCi/L, and the median reported pre-mitigation result was 1.3 pCi/L. Of 82 Michigan counties with 30 or more tests for the same period, 78 reported a higher share; pooled, the state comes to 26.9%.

Which counties border Crawford County?

Crawford County borders 8 counties: Otsego County, Oscoda County, Kalkaska County, Roscommon County, Montmorency County, Antrim County, Ogemaw County and Missaukee County.

Products

Crawford County, Products

Testing a home in Crawford County

In Crawford County, 6.2% of 194 tests reported to CDC over the 2008 to 2017 laboratory totals reached 4 pCi/L, against 26.9% pooled across Michigan. Zone 3 is the lowest label, yet homes at or above 4 pCi/L occur in every zone: a short-term kit (2 to 90 days) is the quick first check in Crawford County.

Test kits and monitors3

See every kit and monitor

Best radon monitors for Crawford County homes, compared

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Crawford County, Bordering counties

Counties bordering Crawford County

Calculated by Radon411

Crawford County, Cities and towns

Cities and towns in Crawford County

Crawford County is growing: the Census Bureau puts it at 13,722 residents on July 1, 2025, up 5.7% from 12,986 in 2020. That works out to 25 people per square mile of land. Grayling, its one incorporated place, has 1,969 residents, 14.3% of the total. CDC's 194 reported tests for 2008 to 2017 work out to 14.1 per 1,000 residents (2025 estimate), close to Michigan's 11.3.

Grayling is the one incorporated place here; CDC publishes no figure by town, so it reads Crawford County's.

Grayling, Crawford County: residents on July 1, 2025
PlaceResidentsSince 2020Share of residents
Grayling1,969+6.4%14.3%

One incorporated place, 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).

Crawford County, Homes

Homes in Crawford County

Crawford County is a place of houses on their own lots: 84% of its 10,268 homes are detached single-family houses, against 72% across Michigan. Much of Crawford County is recent building: 15% of its homes have gone up since 2000 and the middle year built is 1980, against 1972 for Michigan. Owners live in 82% of the occupied homes (Michigan: 73%), so for most households a test and a fix are their own to order.

Homes in Crawford County, Michigan, 2019 to 2023
HomesCrawford CountyMichigan
Housing units10,2684,599,683
Detached houses84%72%
In buildings of 5 or more1%13%
Mobile homes13%5%
Built before 196018%36%
Built since 200015%15%
Middle year built19801972
Owner-occupied82%73%

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