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Radon Levels in Newaygo County, Michigan

EPA puts Newaygo County in Zone 3, its lowest radon zone, and most reported tests there come back low, though 7.9% of 467 (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

    7.9%

    19.0 pts below MI

    Newaygo
    7.9%
    Michigan
    26.9%

    467 tests, 2008 to 2017

  • Median result

    1.3pCi/L

    Below action level

    Newaygo
    1.3 pCi/L
    EPA
    4.0 pCi/L

    Midpoint of the tests, 2008 to 2017

  • Tests reported

    467

    47th of 82 by tests

    Newaygo
    467
    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

    75 of 82

    Lowest quarter

    Newaygo
    7.9%
    Lenawee
    56.7%

    By share, of 82 with 30+ tests

Read a result for Newaygo County

Starts at Newaygo 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. Newaygo County's median reported result, 2008 to 2017.

Interpret this reading

The data

Newaygo County, At a glance

Newaygo County at a glance

Predicted: EPA radon zone

EPA Zone 3: lower predicted potential

is EPA's lowest class, and its forecast for Newaygo 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 90% of the county's area

Predicted: EPA Map of Radon Zones

Measured: tests reported to CDC

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

Reported results by concentration band, Newaygo County, 2008 to 2017, laboratory
Under 2 pCi/L: 66%2 to 4 pCi/L: 26%4 pCi/L and above: 8%

Of 467 pre-mitigation tests reported to CDC, not homes in this area.

Reported results by concentration band, Newaygo County, 2008 to 2017, laboratory: data table
Result bandTests MeasuredShare Measured
Under 2 pCi/L31066.4%
2 to 4 pCi/L12025.7%
4 pCi/L and above377.9%
What these figures count

These are the 467 tests reported to CDC for Newaygo 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

Newaygo County, Compared

Newaygo County radon figures, compared

Calculated by Radon411

Newaygo County reports fewer high tests than Michigan overall. 7.9% of its 467 tests over the 2008 to 2017 laboratory totals were at or above 4 pCi/L. That is 19.0 points below the 26.9% pooled from 83 Michigan counties.

Ordered from highest share down, it comes 75th 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%; Newaygo County sits 27.8 points below it.

Next door, the shares run from 3.2% in Muskegon County to 23.6% in Montcalm County, with Mason County, Oceana County and Muskegon County below Newaygo County. Zone 3 on EPA's map (predicted average under 2 pCi/L) and a 7.9% share point the same way here.

Half the tests came in under 1.3 pCi/L and half over it; the single highest reached 12.0 pCi/L. The rest split 66.4% under 2 pCi/L and 25.7% from 2 to 4 (Michigan: 46.4% and 26.7%).

CDC's ten-year totals for Newaygo County went from 510 tests (2005 to 2014) to 467 (2008 to 2017), the share going from 6.5% to 7.9%.

Newaygo County against Michigan, the United States and nearby counties, 2008 to 2017, laboratory
AreaTestsAt or above 4 pCi/LMedianDifference from Newaygo County
Newaygo County4677.9%1.3 pCi/LThis county
Michigan, pooled83 counties, pooled114,40726.9%Not pooled+19.0 points
United States, pooled2,661 counties, pooled2,013,54435.7%Not pooled+27.8 points
Lenawee Countyhighest in the state1,90756.7%4.6 pCi/L+48.8 points
Midland Countylowest in the state2,0065.3%1.0 pCi/L−2.6 points
Montcalm County, MIborders it55023.6%2.1 pCi/L+15.7 points
Mecosta County, MIborders it61421.7%2.0 pCi/L+13.8 points
Kent County, MIborders it8,44916.5%1.8 pCi/L+8.6 points
Lake County, MIborders it9414.9%1.4 pCi/L+7.0 points
Osceola County, MIborders it24610.6%1.7 pCi/L+2.7 points
Mason County, MIborders it4626.3%1.1 pCi/L−1.6 points
Oceana County, MIborders it3385.9%1.2 pCi/L−2.0 points
Muskegon County, MIborders it6293.2%1.2 pCi/L−4.7 points
Where Newaygo County's reported results fell, 2008 to 2017, laboratory, beside Michigan and the United States
ResultNewaygo County testsNewaygo County shareMichigan shareU.S. shareAgainst Michigan
Under 2 pCi/L31066.4%46.4%39.6%+20.0 points
2 to 4 pCi/L12025.7%26.7%24.7%−1.0 points
4 pCi/L and above377.9%26.9%35.7%−19.0 points
Newaygo 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
Wexford County70 of 826219.7%1.5 pCi/L
Arenac County71 of 82798.9%0.7 pCi/L
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
Newaygo County ten-year laboratory totals, against Michigan's pooled share
PeriodTestsAt or above 4 pCi/LMedianHighestMichigan, pooledChange from the row before
2008 to 20174677.9%1.3 pCi/L12.0 pCi/L26.9%+1.1 points
2007 to 20165016.8%1.2 pCi/L12.0 pCi/L26.8%+0.5 points
2006 to 20155056.3%1.1 pCi/L12.0 pCi/L26.8%−0.2 points
2005 to 20145106.5%1.1 pCi/L12.0 pCi/L26.2%First on file

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

Newaygo County, State data

Michigan's own radon test data

Measured

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

Michigan EGLE publishes its figures by ZIP code, not by county. These are the 20 ZIP codes that lie wholly or partly in Newaygo County, each with the state's own figures for it. Period: About 10 years to 2026-05-15.

ZIP codes in Newaygo County
ZIP codeWhat the state reports
4930719% greater than 4 pCi/L, median 1.9 pCi/L, 169 tests
493090% greater than 4 pCi/L, median 0.0 pCi/L, 5 tests
493121 tests, figures not shown
4932713% greater than 4 pCi/L, median 1.7 pCi/L, 15 tests
4932913% greater than 4 pCi/L, median 1.3 pCi/L, 16 tests
493306% greater than 4 pCi/L, median 2.0 pCi/L, 16 tests
4933622% greater than 4 pCi/L, median 1.9 pCi/L, 9 tests
4933722% greater than 4 pCi/L, median 1.7 pCi/L, 37 tests
493380% greater than 4 pCi/L, median 1.6 pCi/L, 12 tests
493390% greater than 4 pCi/L, median 1.1 pCi/L, 6 tests
493438% greater than 4 pCi/L, median 1.6 pCi/L, 26 tests
4934625% greater than 4 pCi/L, median 2.4 pCi/L, 60 tests
493497% greater than 4 pCi/L, median 1.4 pCi/L, 46 tests
4941216% greater than 4 pCi/L, median 1.1 pCi/L, 38 tests
494210% greater than 4 pCi/L, median 1.6 pCi/L, 8 tests
494256% greater than 4 pCi/L, median 1.3 pCi/L, 18 tests
494510% greater than 4 pCi/L, median 0.8 pCi/L, 8 tests
494573% greater than 4 pCi/L, median 0.7 pCi/L, 33 tests
4945913% greater than 4 pCi/L, median 1.6 pCi/L, 8 tests
496778% greater than 4 pCi/L, median 1.1 pCi/L, 39 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.

Newaygo County, Geology

The ground under Newaygo County

Predicted

Most of the ground under Newaygo County is one class on USGS's geologic map: 90.2% of its land is low radon potential, with 9.8% moderate. The map puts 74.7% of Newaygo County in the area it calls Lake Michigan Lobe Deposits and 15.5% in North-Central Michigan Basin, with one smaller area beside them. USGS gives both a radon index of 8, in the low band (5 to 8).

USGS's geologic areas under Newaygo County
AreaThe rock, in USGS's wordsPotentialRadon indexShare of land
Lake Michigan Lobe DepositsSandy to clayey glacial deposits and some glacial lake deposits.Low874.7%
North-Central Michigan BasinSandy and silty glacial deposits derived from sandstones, gray shales, limestones, and dolomites.Low815.5%
South-Central Michigan BasinSandy and silty glacial deposits derived from sandstones, gray shales, limestones, and dolomites.Moderate109.8%

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

Newaygo County beside the ground around it

Across Michigan 9.6% of the land is rated high; none of Newaygo County's is. Of the 8 counties that border it, 3 have more moderate-potential ground, Montcalm County the most at 97.4%.

Share of land by USGS radon potential: Newaygo County, the 8 counties bordering it and Michigan
AreaEPA zoneLow potentialModerate potentialHigh potential
Newaygo CountyZone 390.2%9.8%None
Mecosta CountyZone 379.3%20.7%None
Lake CountyZone 3100%NoneNone
Oceana CountyZone 399.5%NoneNone
Muskegon CountyZone 398.4%NoneNone
Osceola CountyZone 3100%NoneNone
Mason CountyZone 399.7%NoneNone
Kent CountyZone 223.6%76.4%None
Montcalm CountyZone 22.6%97.4%None
Michigan83 counties, pooled by land areaVaries45.0%44.3%9.6%

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

Local help

Newaygo County, Local resources

Radon testing and mitigation in Newaygo 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

Newaygo County, Questions

Questions about radon in Newaygo County

Are radon levels high in Newaygo County?

Over the 2008 to 2017 laboratory totals, 7.9% of the radon tests reported to CDC for Newaygo 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, 74 reported a higher share; pooled, the state comes to 26.9%.

Which counties border Newaygo County?

Newaygo County borders 8 counties: Mecosta County, Lake County, Oceana County, Muskegon County, Osceola County, Mason County, Kent County and Montcalm County.

Products

Newaygo County, Products

Testing a home in Newaygo County

In Newaygo County, 7.9% of 467 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 Newaygo County.

Test kits and monitors3

See every kit and monitor

Best radon monitors for Newaygo County homes, compared

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Newaygo County, Bordering counties

Counties bordering Newaygo County

Calculated by Radon411

Newaygo County, Cities and towns

Cities and towns in Newaygo County

The Census Bureau estimates 51,622 residents in Newaygo County for July 1, 2025, 1,531 more than in 2020 (+3.1%). That works out to 62 people per square mile of land. No town dominates: Fremont, the largest, has 4,599 residents, 8.9% of the total. CDC's 467 reported tests for 2008 to 2017 work out to 9.0 per 1,000 residents (2025 estimate), close to Michigan's 11.3.

From Fremont to Hesperia, CDC publishes no figure by town: each reads Newaygo County's.

The cities and towns in Newaygo County by residents, July 1, 2025
PlaceResidentsSince 2020Share of residents
Fremont4,599+2.0%8.9%
Newaygo2,547+3.1%4.9%
White Cloud1,548+4.8%3.0%
Grant982+2.3%1.9%
Hesperiaextends beyond Newaygo County978+0.9%Counted whole

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). A place that extends beyond Newaygo County is counted whole, so it has no share.

Newaygo County, Homes

Homes in Newaygo County

Newaygo County is a place of houses on their own lots: 75% of its 24,781 homes are detached single-family houses, against 72% across Michigan. Half of its homes were built before 1978, close to Michigan's 1972: 27% date from before 1960 and 15% from 2000 or later. Owners live in 86% of the occupied homes (Michigan: 73%), so for most households a test and a fix are their own to order.

Homes in Newaygo County, Michigan, 2019 to 2023
HomesNewaygo CountyMichigan
Housing units24,7814,599,683
Detached houses75%72%
In buildings of 5 or more3%13%
Mobile homes19%5%
Built before 196027%36%
Built since 200015%15%
Middle year built19781972
Owner-occupied86%73%

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