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Radon Levels in Oscoda County, Michigan

EPA puts Oscoda County in Zone 3, its lowest radon zone, and 18.5% of its 54 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

    18.5%

    8.4 pts below MI

    Oscoda
    18.5%
    Michigan
    26.9%

    54 tests, 2008 to 2017

  • Median result

    2.1pCi/L

    Below action level

    Oscoda
    2.1 pCi/L
    EPA
    4.0 pCi/L

    Midpoint of the tests, 2008 to 2017

  • Tests reported

    54

    81st of 82 by tests

    Oscoda
    54
    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

    35 of 82

    Middle half

    Oscoda
    18.5%
    Lenawee
    56.7%

    By share, of 82 with 30+ tests

Read a result for Oscoda County

Starts at Oscoda County's median, 2.1 pCi/L

2.1pCi/L

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

EPA’s reading of 2.1 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. Oscoda County's median reported result, 2008 to 2017.

Interpret this readingWhat a fix costs

The data

Oscoda County, At a glance

Oscoda County at a glance

Predicted: EPA radon zone

EPA Zone 3: lower predicted potential

is EPA's lowest class, and its forecast for Oscoda 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 84% of the county's area

Predicted: EPA Map of Radon Zones

Measured: tests reported to CDC

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

Reported results by concentration band, Oscoda County, 2008 to 2017, laboratory
Under 2 pCi/L: 46%2 to 4 pCi/L: 35%4 pCi/L and above: 19%

Of 54 pre-mitigation tests reported to CDC, not homes in this area.

Reported results by concentration band, Oscoda County, 2008 to 2017, laboratory: data table
Result bandTests MeasuredShare Measured
Under 2 pCi/L2546.3%
2 to 4 pCi/L1935.2%
4 pCi/L and above1018.5%
What these figures count

These are the 54 tests reported to CDC for Oscoda 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

Oscoda County, Compared

Oscoda County radon figures, compared

Calculated by Radon411

Oscoda County's 54 reported tests over the 2008 to 2017 laboratory totals had a middle value of 2.1 pCi/L and a maximum of 7.4 pCi/L, and 18.5% reached 4 pCi/L. Michigan as a whole (83 Michigan counties, pooled) comes to 26.9%: 8.4 points higher than here.

Among its state's counties it ranks 35th 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, 25 tests (46.3%) came in under 2 pCi/L, against 46.4% statewide, and 19 tests (35.2%) fell between 2 and 4, against 26.7% statewide. CDC's ten-year totals for Oscoda County went from 51 tests (2005 to 2014) to 54 (2008 to 2017), the share going from 17.6% to 18.5%.

EPA's 1993 zone map puts Oscoda County in Zone 3, a predicted county average under 2 pCi/L. USGS geology rates 84% of the county's land low radon potential.

Next door, the shares run from 6.2% in Crawford County to 38.2% in Otsego County, with Ogemaw County, Montmorency County and Alpena County below Oscoda County.

Oscoda County against Michigan, the United States and nearby counties, 2008 to 2017, laboratory
AreaTestsAt or above 4 pCi/LMedianDifference from Oscoda County
Oscoda County5418.5%2.1 pCi/LThis county
Michigan, pooled83 counties, pooled114,40726.9%Not pooled+8.4 points
United States, pooled2,661 counties, pooled2,013,54435.7%Not pooled+17.2 points
Lenawee Countyhighest in the state1,90756.7%4.6 pCi/L+38.2 points
Muskegon Countylowest in the state6293.2%1.2 pCi/L−15.3 points
Otsego County, MIborders it1,08038.2%3.2 pCi/L+19.7 points
Alcona County, MIborders it18520.5%1.7 pCi/L+2.0 points
Ogemaw County, MIborders it12015.0%2.0 pCi/L−3.5 points
Montmorency County, MIborders it19114.7%1.6 pCi/L−3.8 points
Alpena County, MIborders it1,13913.3%0.9 pCi/L−5.2 points
Roscommon County, MIborders it16612.7%1.0 pCi/L−5.8 points
Iosco County, MIborders it1567.7%0.7 pCi/L−10.8 points
Crawford County, MIborders it1946.2%1.3 pCi/L−12.3 points
Where Oscoda County's reported results fell, 2008 to 2017, laboratory, beside Michigan and the United States
ResultOscoda County testsOscoda County shareMichigan shareU.S. shareAgainst Michigan
Under 2 pCi/L2546.3%46.4%39.6%−0.1 points
2 to 4 pCi/L1935.2%26.7%24.7%+8.5 points
4 pCi/L and above1018.5%26.9%35.7%−8.4 points
Oscoda 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
Genesee County30 of 821,69921.9%2.0 pCi/L
Mecosta County31 of 8261421.7%2.0 pCi/L
Delta County32 of 8271121.5%1.7 pCi/L
Alcona County33 of 8218520.5%1.7 pCi/L
Mackinac County34 of 829119.8%1.2 pCi/L
Oscoda County35 of 825418.5%2.1 pCi/L
Allegan County36 of 8276618.4%1.7 pCi/L
Van Buren County37 of 8239418.0%1.9 pCi/L
Wayne County38 of 825,59417.5%1.8 pCi/L
Saginaw County39 of 823,03717.0%1.7 pCi/L
Ottawa County40 of 822,54616.8%1.6 pCi/L
Oscoda County ten-year laboratory totals, against Michigan's pooled share
PeriodTestsAt or above 4 pCi/LMedianHighestMichigan, pooledChange from the row before
2008 to 20175418.5%2.1 pCi/L7.4 pCi/L26.9%+1.1 points
2007 to 20164617.4%2.2 pCi/L6.0 pCi/L26.8%+1.1 points
2006 to 20154316.3%2.2 pCi/L6.0 pCi/L26.8%−1.3 points
2005 to 20145117.6%2.0 pCi/L9.2 pCi/L26.2%First on file

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

Oscoda County, State data

Michigan's own radon test data

Measured

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

Michigan EGLE publishes its figures by ZIP code, not by county. These are the 6 ZIP codes that lie wholly or partly in Oscoda County, each with the state's own figures for it. Period: About 10 years to 2026-05-15.

ZIP codes in Oscoda County
ZIP codeWhat the state reports
4862114% greater than 4 pCi/L, median 2.5 pCi/L, 7 tests
486363 tests, figures not shown
4864725% greater than 4 pCi/L, median 1.3 pCi/L, 8 tests
486540% greater than 4 pCi/L, median 0.0 pCi/L, 5 tests
487283 tests, figures not shown
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.

Oscoda County, Geology

The ground under Oscoda County

Predicted

Most of the ground under Oscoda County is one class on USGS's geologic map: 83.5% of its land is low radon potential, with 16.5% moderate. The map puts 83.5% of Oscoda County in the area it calls North-Central Michigan Basin and 16.5% in Antrim Shale. USGS gives the first a radon index of 8, in the low band (5 to 8), and the second 10, in the moderate band (9 to 11).

USGS's geologic areas under Oscoda 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.Low883.5%
Antrim ShaleGlacial deposits dervied in part from Antrim black shale.Moderate1016.5%

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

Oscoda County beside the ground around it

Across Michigan 9.6% of the land is rated high; none of Oscoda County's is. Of the 8 counties that border it, 4 have more moderate-potential ground, Montmorency County the most at 97.9%.

Share of land by USGS radon potential: Oscoda County, the 8 counties bordering it and Michigan
AreaEPA zoneLow potentialModerate potentialHigh potential
Oscoda CountyZone 383.5%16.5%None
Montmorency CountyZone 22.1%97.9%None
Crawford CountyZone 3100%NoneNone
Ogemaw CountyZone 3100%NoneNone
Alcona CountyZone 230.5%69.4%None
Otsego CountyZone 236.2%63.8%None
Alpena CountyZone 230.5%68.4%None
Iosco CountyZone 399.6%NoneNone
Roscommon 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

Oscoda County, Local resources

Radon testing and mitigation in Oscoda 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

Oscoda County, Questions

Questions about radon in Oscoda County

Are radon levels high in Oscoda County?

Over the 2008 to 2017 laboratory totals, 18.5% of the radon tests reported to CDC for Oscoda County, Michigan were at or above 4 pCi/L, and the median reported pre-mitigation result was 2.1 pCi/L. Of 82 Michigan counties with 30 or more tests for the same period, 34 reported a higher share; pooled, the state comes to 26.9%.

Which counties border Oscoda County?

Oscoda County borders 8 counties: Montmorency County, Crawford County, Ogemaw County, Alcona County, Otsego County, Alpena County, Iosco County and Roscommon County.

Products

Oscoda County, Products

Testing a home in Oscoda County

In Oscoda County, 18.5% of 54 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 Oscoda County.

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Best radon monitors for Oscoda County homes, compared

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Oscoda County, Bordering counties

Counties bordering Oscoda County

Calculated by Radon411

Oscoda County, Residents

Who lives in Oscoda County

Oscoda County is growing: the Census Bureau puts it at 8,723 residents on July 1, 2025, up 6.0% from 8,230 in 2020. That works out to 15 people per square mile of land. Reported testing is thin here: 54 tests over 2008 to 2017, or 6.2 for every 1,000 residents (2025 estimate), where Michigan as a whole comes to 11.3.

Census lists no incorporated place in Oscoda County: every home in it reads the county's figures.

Residents: U.S. Census Bureau population estimates for July 1, 2025 (Vintage 2025).

Oscoda County, Homes

Homes in Oscoda County

Oscoda County is a place of houses on their own lots: 81% of its 7,705 homes are detached single-family houses, against 72% across Michigan. Half of its homes were built before 1974, close to Michigan's 1972: 23% date from before 1960 and 12% from 2000 or later. Owners live in 87% of the occupied homes (Michigan: 73%), so for most households a test and a fix are their own to order.

Homes in Oscoda County, Michigan, 2019 to 2023
HomesOscoda CountyMichigan
Housing units7,7054,599,683
Detached houses81%72%
In buildings of 5 or more1%13%
Mobile homes16%5%
Built before 196023%36%
Built since 200012%15%
Middle year built19741972
Owner-occupied87%73%

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