Short-term kit
Air Chek Short-Term radon test kit you hang, lab fee included
- Lab fee included
In home: 72 to 168 hours
Locations and reports
Radon Levels in Mecosta County, Michigan
EPA puts Mecosta County in Zone 3, its lowest radon zone, and 21.7% of its 614 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
Share at 4+ pCi/L
21.7%
5.2 pts below MI
- Mecosta
- 21.7%
- Michigan
- 26.9%
614 tests, 2008 to 2017
Median result
2.0pCi/L
Below action level
- Mecosta
- 2.0 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2008 to 2017
Tests reported
614
42nd of 82 by tests
- Mecosta
- 614
- 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
31 of 82
Middle half
- Mecosta
- 21.7%
- Lenawee
- 56.7%
By share, of 82 with 30+ tests
Read a result for Mecosta County
Starts at Mecosta County's median, 2.0 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 2.0 pCi/L
Between 2 and 4 pCi/L
- Under 20 to 1.9 pCi/L
- 2 to 4consider a fix
- 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. Mecosta County's median reported result, 2008 to 2017.
The data
Mecosta County, At a glance
Mecosta County at a glance
Predicted: EPA radon zone
EPA Zone 3: lower predicted potential
USGS geologic potential: Low across 79% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Mecosta County, 2008 to 2017, laboratory
Under 2 pCi/L: 47%2 to 4 pCi/L: 31%4 pCi/L and above: 22%
Of 614 pre-mitigation tests reported to CDC, not homes in this area.
| Result band | Tests Measured | Share Measured |
|---|---|---|
| Under 2 pCi/L | 290 | 47.2% |
| 2 to 4 pCi/L | 191 | 31.1% |
| 4 pCi/L and above | 133 | 21.7% |
What these figures count
These are the 614 tests reported to CDC for Mecosta 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).
Mecosta County, Compared
Mecosta County radon figures, compared
Calculated by Radon411Mecosta County's 614 reported tests over the 2008 to 2017 laboratory totals had a middle value of 2.0 pCi/L and a maximum of 32.2 pCi/L, and 21.7% reached 4 pCi/L. Michigan as a whole (83 Michigan counties, pooled) comes to 26.9%: 5.2 points higher than here.
Among its state's counties it ranks 31st 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, 290 tests (47.2%) came in under 2 pCi/L, against 46.4% statewide, and 191 tests (31.1%) fell between 2 and 4, against 26.7% statewide. CDC's ten-year totals for Mecosta County went from 637 tests (2005 to 2014) to 614 (2008 to 2017), the share going from 20.4% to 21.7%.
EPA's 1993 zone map puts Mecosta County in Zone 3, a predicted county average under 2 pCi/L. USGS geology rates 79% of the county's land low radon potential.
Next door, the shares run from 7.9% in Newaygo County to 23.6% in Montcalm County, with Isabella County, Lake County and Clare County below Mecosta County.
CDC also counts 35 tests taken after mitigation in Mecosta County for the same period: tests in homes where a fix was already in.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Mecosta County, State data
Michigan's own radon test data
MeasuredWhat Michigan's own agencies publish about radon tests in Mecosta 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 Mecosta County
Michigan EGLE publishes its figures by ZIP code, not by county. These are the 16 ZIP codes that lie wholly or partly in Mecosta 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 |
| 48850 | 7% greater than 4 pCi/L, median 0.8 pCi/L, 15 tests |
| 48886 | 3 tests, figures not shown |
| 49305 | 0% greater than 4 pCi/L, median 1.3 pCi/L, 15 tests |
| 49307 | 19% greater than 4 pCi/L, median 1.9 pCi/L, 169 tests |
| 49310 | 0% greater than 4 pCi/L, median 0.9 pCi/L, 6 tests |
| 49332 | 11% greater than 4 pCi/L, median 2.0 pCi/L, 18 tests |
| 49336 | 22% greater than 4 pCi/L, median 1.9 pCi/L, 9 tests |
| 49337 | 22% greater than 4 pCi/L, median 1.7 pCi/L, 37 tests |
| 49338 | 0% greater than 4 pCi/L, median 1.6 pCi/L, 12 tests |
| 49340 | 25% greater than 4 pCi/L, median 1.9 pCi/L, 12 tests |
| 49342 | 30% greater than 4 pCi/L, median 0.9 pCi/L, 10 tests |
| 49346 | 25% greater than 4 pCi/L, median 2.4 pCi/L, 60 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 |
| 49679 | 2 tests, figures not shown |
- 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.
Mecosta County, Geology
The ground under Mecosta County
PredictedMost of the ground under Mecosta County is one class on USGS's geologic map: 79.3% of its land is low radon potential, with 20.7% moderate. The map puts 79.3% of Mecosta County in the area it calls North-Central Michigan Basin and 20.7% in South-Central Michigan Basin. 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).
| 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 | 79.3% |
| South-Central Michigan Basin | Sandy and silty glacial deposits derived from sandstones, gray shales, limestones, and dolomites. | Moderate | 10 | 20.7% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Mecosta County beside the ground around it
Across Michigan 9.6% of the land is rated high; none of Mecosta County's is. Of the 6 counties that border it, 2 have more moderate-potential ground, Montcalm County the most at 97.4%.
The map rates the ground, not the air in any home.
Local help
Mecosta County, Local resources
Radon testing and mitigation in Mecosta 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
Mecosta County, Questions
Questions about radon in Mecosta County
Are radon levels high in Mecosta County?
Over the 2008 to 2017 laboratory totals, 21.7% of the radon tests reported to CDC for Mecosta County, Michigan were at or above 4 pCi/L, and the median reported pre-mitigation result was 2.0 pCi/L. Of 82 Michigan counties with 30 or more tests for the same period, 30 reported a higher share; pooled, the state comes to 26.9%.
Which counties border Mecosta County?
Mecosta County borders 6 counties: Newaygo County, Isabella County, Osceola County, Montcalm County, Clare County and Lake County.
Products
Mecosta County, Products
Testing a home in Mecosta County
In Mecosta County, 21.7% of 614 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 Mecosta 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
MonitorX-Sense
XR0A-iR Wi-Fi battery radon detector with a screen
- C-NRPP 2024/25: Not included
- Battery
- Wi-Fi
- Screen, app
Method: Alpha spectrometry
First reading: Within 24 hours
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Mecosta County, Bordering counties
Counties bordering Mecosta County
Calculated by Radon411- Radon levels in Montcalm CountyEPA zone 2
23.6%at or above 4 pCi/L
Median 2.1 pCi/L · 550 tests · 1.9 points above Mecosta County
- Radon levels in Isabella CountyEPA zone 3
16.4%at or above 4 pCi/L
Median 1.6 pCi/L · 870 tests · 5.3 points below Mecosta County
- Radon levels in Lake CountyEPA zone 3
14.9%at or above 4 pCi/L
Median 1.4 pCi/L · 94 tests · 6.8 points below Mecosta County
- Radon levels in Clare CountyEPA zone 3
14.1%at or above 4 pCi/L
Median 1.6 pCi/L · 198 tests · 7.6 points below Mecosta County
- Radon levels in Osceola CountyEPA zone 3
10.6%at or above 4 pCi/L
Median 1.7 pCi/L · 246 tests · 11.1 points below Mecosta County
- Radon levels in Newaygo CountyEPA zone 3
7.9%at or above 4 pCi/L
Median 1.3 pCi/L · 467 tests · 13.8 points below Mecosta County
Mecosta County, Cities and towns
Cities and towns in Mecosta County
The Census Bureau estimates 42,320 residents in Mecosta County for July 1, 2025, 1,906 more than in 2020 (+4.7%). That works out to 76 people per square mile of land. Its largest town, Big Rapids, has 8,623 residents, 20.4% of the total. Together its 5 incorporated places hold 24.3% of those residents; the other 75.7% live outside any of them. CDC's 614 reported tests for 2008 to 2017 work out to 14.5 per 1,000 residents (2025 estimate), close to Michigan's 11.3.
From Big Rapids to Stanwood, CDC publishes no figure by town: each reads Mecosta County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Big Rapids | 8,623 | +3.1% | 20.4% |
| Morley | 535 | +4.5% | 1.3% |
| Mecosta | 484 | +21.0% | 1.1% |
| Barryton | 415 | +3.5% | 1.0% |
| Stanwood | 212 | +4.4% | 0.5% |
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).
Mecosta County, Homes
Homes in Mecosta County
Of Mecosta County's 21,045 homes, 70% are detached houses, against 72% across Michigan; 17% are mobile homes. Much of Mecosta County is recent building: 19% of its homes have gone up since 2000 and the middle year built is 1980, against 1972 for Michigan. Owners live in 76% of the occupied homes (Michigan: 73%), so for most households a test and a fix are their own to order.
| Homes | Mecosta County | Michigan |
|---|---|---|
| Housing units | 21,045 | 4,599,683 |
| Detached houses | 70% | 72% |
| In buildings of 5 or more | 6% | 13% |
| Mobile homes | 17% | 5% |
| Built before 1960 | 22% | 36% |
| Built since 2000 | 19% | 15% |
| Middle year built | 1980 | 1972 |
| Owner-occupied | 76% | 73% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.