Short-term kit
Radon Short Term Test Kit short-term charcoal radon test kit, lab fee included
- Lab fee included
Method: Charcoal
In home: 2 to 7 days
Locations and reports
Radon Levels in Osceola County, Michigan
EPA puts Osceola County in Zone 3, its lowest radon zone, and most reported tests there come back low, though 10.6% of 246 (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
Share at 4+ pCi/L
10.6%
16.3 pts below MI
- Osceola
- 10.6%
- Michigan
- 26.9%
246 tests, 2008 to 2017
Median result
1.7pCi/L
Below action level
- Osceola
- 1.7 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2008 to 2017
Tests reported
246
63rd of 82 by tests
- Osceola
- 246
- Oakland
- 16,224
Reported to CDC before any fix, 2008 to 2017
EPA radon zone
Zone 3
Lower potential
- 1
- 2
- Zone 3
1 highest, 3 lowest
EPA predicts under 2 pCi/L indoors
Rank in Michigan
68 of 82
Lowest quarter
- Osceola
- 10.6%
- Lenawee
- 56.7%
By share, of 82 with 30+ tests
Read a result for Osceola County
Starts at Osceola County's median, 1.7 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 1.7 pCi/L
Below 2 pCi/L
- Under 20 to 1.9 pCi/L
- 2 to 4consider a fix
- 4 and aboveEPA says fix it
This result is below 2 pCi/L, the level at which EPA says a fix should be considered. Osceola County's median reported result, 2008 to 2017.
The data
Osceola County, At a glance
Osceola County at a glance
Predicted: EPA radon zone
EPA Zone 3: lower predicted potential
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 Osceola County, 2008 to 2017, laboratory
Under 2 pCi/L: 58%2 to 4 pCi/L: 32%4 pCi/L and above: 10%
Of 246 pre-mitigation tests reported to CDC, not homes in this area.
| Result band | Tests Measured | Share Measured |
|---|---|---|
| Under 2 pCi/L | 142 | 57.7% |
| 2 to 4 pCi/L | 78 | 31.7% |
| 4 pCi/L and above | 26 | 10.6% |
What these figures count
These are the 246 tests reported to CDC for Osceola 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).
Osceola County, Compared
Osceola County radon figures, compared
Calculated by Radon411Osceola County reports fewer high tests than Michigan overall. 10.6% of its 246 tests over the 2008 to 2017 laboratory totals were at or above 4 pCi/L. That is 16.3 points below the 26.9% pooled from 83 Michigan counties.
Ordered from highest share down, it comes 68th 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%; Osceola County sits 25.1 points below it.
Next door, the shares run from 7.9% in Newaygo County to 21.7% in Mecosta County, with Wexford County and Newaygo County below Osceola County. Zone 3 on EPA's map (predicted average under 2 pCi/L) and a 10.6% share point the same way here.
Half the tests came in under 1.7 pCi/L and half over it; the single highest reached 20.6 pCi/L. The rest split 57.7% under 2 pCi/L and 31.7% from 2 to 4 (Michigan: 46.4% and 26.7%).
CDC's ten-year totals for Osceola County went from 375 tests (2005 to 2014) to 246 (2008 to 2017), the share going from 8.8% to 10.6%.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Osceola County, State data
Michigan's own radon test data
MeasuredWhat Michigan's own agencies publish about radon tests in Osceola 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 Osceola County
Michigan EGLE publishes its figures by ZIP code, not by county. These are the 9 ZIP codes that lie wholly or partly in Osceola County, each with the state's own figures for it. Period: About 10 years to 2026-05-15.
| ZIP code | What the state reports |
|---|---|
| 48632 | 33% greater than 4 pCi/L, median 2.3 pCi/L, 12 tests |
| 49338 | 0% greater than 4 pCi/L, median 1.6 pCi/L, 12 tests |
| 49631 | 12% greater than 4 pCi/L, median 1.3 pCi/L, 26 tests |
| 49639 | 20% greater than 4 pCi/L, median 1.3 pCi/L, 15 tests |
| 49655 | 11% greater than 4 pCi/L, median 1.3 pCi/L, 9 tests |
| 49665 | 27% greater than 4 pCi/L, median 2.3 pCi/L, 11 tests |
| 49677 | 8% greater than 4 pCi/L, median 1.1 pCi/L, 39 tests |
| 49679 | 2 tests, figures not shown |
| 49688 | 6% greater than 4 pCi/L, median 1.1 pCi/L, 16 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.
Osceola County, Geology
The ground under Osceola County
PredictedUSGS's geologic map puts all of Osceola 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).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| North-Central Michigan Basin | Sandy and silty glacial deposits derived from sandstones, gray shales, limestones, and dolomites. | Low | 8 | 100% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Osceola County beside the ground around it
Across Michigan 9.6% of the land is rated high; none of Osceola County's is. Of the 7 counties that border it, 3 have more moderate-potential ground, Isabella County the most at 26.5%.
The map rates the ground, not the air in any home.
Local help
Osceola County, Local resources
Radon testing and mitigation in Osceola County
- Michigan Indoor Radon ProgramMichigan Indoor Radon Program, run by Michigan Department of Environment, Great Lakes, and Energy, does not license radon professionals, and answers questions about testing and mitigation in Michigan.Visit the program’s page(opens in a new tab)
- Free and low-cost kitsAsk the program whether it has free or discounted kits, or compare kits you can buy.
- Compare kits
- Professionals in Michigan69 professionals are listed in Michigan.
What Michigan's program says
- Phone
- 800-723-6642
- Radon@Michigan.gov
- Licensing of radon professionals
Michigan does not license or regulate radon testing and mitigation contractors.
What it means
Osceola County, Questions
Questions about radon in Osceola County
Are radon levels high in Osceola County?
Over the 2008 to 2017 laboratory totals, 10.6% of the radon tests reported to CDC for Osceola County, Michigan were at or above 4 pCi/L, and the median reported pre-mitigation result was 1.7 pCi/L. Of 82 Michigan counties with 30 or more tests for the same period, 67 reported a higher share; pooled, the state comes to 26.9%.
Which counties border Osceola County?
Osceola County borders 7 counties: Lake County, Clare County, Missaukee County, Mecosta County, Wexford County, Newaygo County and Isabella County.
Products
Osceola County, Products
Testing a home in Osceola County
In Osceola County, 10.6% of 246 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 Osceola County.
Test kits and monitors3
See every kit and monitor
Long-term kit
RL116 long-term radon test kit
- Lab fee extra
Method: Alpha track
In home: 90 days to 12 months
Monitor
Corentium Home battery digital radon detector
- C-NRPP 2024/25: Approved
- Battery
- Screen
Method: Alpha spectrometry
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Osceola County, Bordering counties
Counties bordering Osceola County
Calculated by Radon411- Radon levels in Mecosta CountyEPA zone 3
21.7%at or above 4 pCi/L
Median 2.0 pCi/L · 614 tests · 11.1 points above Osceola County
- Radon levels in Isabella CountyEPA zone 3
16.4%at or above 4 pCi/L
Median 1.6 pCi/L · 870 tests · 5.8 points above Osceola County
- Radon levels in Lake CountyEPA zone 3
14.9%at or above 4 pCi/L
Median 1.4 pCi/L · 94 tests · 4.3 points above Osceola County
- Radon levels in Missaukee CountyEPA zone 3
14.9%at or above 4 pCi/L
Median 1.6 pCi/L · 350 tests · 4.3 points above Osceola County
- Radon levels in Clare CountyEPA zone 3
14.1%at or above 4 pCi/L
Median 1.6 pCi/L · 198 tests · 3.5 points above Osceola County
- Radon levels in Wexford CountyEPA zone 3
9.7%at or above 4 pCi/L
Median 1.5 pCi/L · 621 tests · 0.9 points below Osceola County
- Radon levels in Newaygo CountyEPA zone 3
7.9%at or above 4 pCi/L
Median 1.3 pCi/L · 467 tests · 2.7 points below Osceola County
Osceola County, Cities and towns
Cities and towns in Osceola County
The Census Bureau estimates 23,516 residents in Osceola County for July 1, 2025, 610 more than in 2020 (+2.7%). That works out to 42 people per square mile of land. No town dominates: Reed City, the largest, has 2,528 residents, 10.8% of the total. Together its 6 incorporated places hold 25.4% of those residents; the other 74.6% live outside any of them. CDC's 246 reported tests for 2008 to 2017 work out to 10.5 per 1,000 residents (2025 estimate), close to Michigan's 11.3.
From Reed City to Tustin, CDC publishes no figure by town: each reads Osceola County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Reed City | 2,528 | +1.8% | 10.8% |
| Evart | 1,789 | +2.1% | 7.6% |
| Marion | 802 | +2.2% | 3.4% |
| Hersey | 362 | +2.8% | 1.5% |
| Le Roy | 252 | +1.2% | 1.1% |
| Tustin | 249 | +1.2% | 1.1% |
6 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).
Osceola County, Homes
Homes in Osceola County
Osceola County is a place of houses on their own lots: 77% of its 12,634 homes are detached single-family houses, against 72% across Michigan. Half of its homes were built before 1976, close to Michigan's 1972: 28% date from before 1960 and 15% from 2000 or later. Owners live in 84% of the occupied homes (Michigan: 73%), so for most households a test and a fix are their own to order.
| Homes | Osceola County | Michigan |
|---|---|---|
| Housing units | 12,634 | 4,599,683 |
| Detached houses | 77% | 72% |
| In buildings of 5 or more | 3% | 13% |
| Mobile homes | 18% | 5% |
| Built before 1960 | 28% | 36% |
| Built since 2000 | 15% | 15% |
| Middle year built | 1976 | 1972 |
| Owner-occupied | 84% | 73% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.