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 Schoolcraft County, Michigan
EPA puts Schoolcraft County in Zone 3, its lowest radon zone, and 15.2% of its 66 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
15.2%
11.7 pts below MI
- Schoolcraft
- 15.2%
- Michigan
- 26.9%
66 tests, 2008 to 2017
Median result
0.6pCi/L
Below action level
- Schoolcraft
- 0.6 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2008 to 2017
Tests reported
66
80th of 82 by tests
- Schoolcraft
- 66
- 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
49 of 82
Middle half
- Schoolcraft
- 15.2%
- Lenawee
- 56.7%
By share, of 82 with 30+ tests
Read a result for Schoolcraft County
Starts at Schoolcraft County's median, 0.6 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 0.6 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. Schoolcraft County's median reported result, 2008 to 2017.
The data
Schoolcraft County, At a glance
Schoolcraft County at a glance
Predicted: EPA radon zone
EPA Zone 3: lower predicted potential
USGS geologic potential: Low across 82% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Schoolcraft County, 2008 to 2017, laboratory
Under 2 pCi/L: 79%2 to 4 pCi/L: 6%4 pCi/L and above: 15%
Of 66 pre-mitigation tests reported to CDC, not homes in this area.
| Result band | Tests Measured | Share Measured |
|---|---|---|
| Under 2 pCi/L | 52 | 78.8% |
| 2 to 4 pCi/L | 4 | 6.1% |
| 4 pCi/L and above | 10 | 15.2% |
What these figures count
These are the 66 tests reported to CDC for Schoolcraft 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).
Schoolcraft County, Compared
Schoolcraft County radon figures, compared
Calculated by Radon411Schoolcraft County's 66 reported tests over the 2008 to 2017 laboratory totals had a middle value of 0.6 pCi/L and a maximum of 17.2 pCi/L, and 15.2% reached 4 pCi/L. Michigan as a whole (83 Michigan counties, pooled) comes to 26.9%: 11.7 points higher than here.
Among its state's counties it ranks 49th 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, 52 tests (78.8%) came in under 2 pCi/L, against 46.4% statewide, and 4 tests (6.1%) fell between 2 and 4, against 26.7% statewide. CDC's ten-year totals for Schoolcraft County went from 87 tests (2005 to 2014) to 66 (2008 to 2017), the share going from 9.2% to 15.2%.
EPA's 1993 zone map puts Schoolcraft County in Zone 3, a predicted county average under 2 pCi/L. USGS geology rates 82% of the county's land low radon potential.
Next door, the shares run from 16.4% in Alger County to 21.5% in Delta County.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Schoolcraft County, State data
Michigan's own radon test data
MeasuredWhat Michigan's own agencies publish about radon tests in Schoolcraft 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 Schoolcraft County
Michigan EGLE publishes its figures by ZIP code, not by county. These are the 7 ZIP codes that lie wholly or partly in Schoolcraft County, each with the state's own figures for it. Period: About 10 years to 2026-05-15.
| ZIP code | What the state reports |
|---|---|
| 49817 | 43% greater than 4 pCi/L, median 2.5 pCi/L, 7 tests |
| 49836 | 0% greater than 4 pCi/L, median 1.2 pCi/L, 6 tests |
| 49840 | 0% greater than 4 pCi/L, median 1.7 pCi/L, 8 tests |
| 49854 | 6% greater than 4 pCi/L, median 0.9 pCi/L, 66 tests |
| 49883 | 1 tests, figures not shown |
| 49884 | 3 tests, figures not shown |
| 49895 | 29% greater than 4 pCi/L, median 1.5 pCi/L, 14 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.
Schoolcraft County, Geology
The ground under Schoolcraft County
PredictedMost of the ground under Schoolcraft County is one class on USGS's geologic map: 82.0% of its land is low radon potential, with 17.9% moderate. The map puts 82.0% of Schoolcraft County in the area it calls Glacial Lakes and 17.9% in Outer Michigan Basin. USGS gives the first a radon index of 7, 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 |
|---|---|---|---|---|
| Glacial Lakes | Silt and clay glacial lake deposits. | Low | 7 | 82.0% |
| Outer Michigan Basin | Glacial deposits derived from Paleozoic carbonate rocks and sandstones. | Moderate | 10 | 17.9% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Schoolcraft County beside the ground around it
Across Michigan 9.6% of the land is rated high; none of Schoolcraft County's is. Of the 4 counties that border it, 2 have more moderate-potential ground, Alger County the most at 75.9%.
The map rates the ground, not the air in any home.
Local help
Schoolcraft County, Local resources
Radon testing and mitigation in Schoolcraft 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
Schoolcraft County, Questions
Questions about radon in Schoolcraft County
Are radon levels high in Schoolcraft County?
Over the 2008 to 2017 laboratory totals, 15.2% of the radon tests reported to CDC for Schoolcraft County, Michigan were at or above 4 pCi/L, and the median reported pre-mitigation result was 0.6 pCi/L. Of 82 Michigan counties with 30 or more tests for the same period, 48 reported a higher share; pooled, the state comes to 26.9%.
Which counties border Schoolcraft County?
Schoolcraft County borders 4 counties: Alger County, Luce County, Delta County and Mackinac County.
Products
Schoolcraft County, Products
Testing a home in Schoolcraft County
In Schoolcraft County, 15.2% of 66 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 Schoolcraft 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
MonitorAranet
Radon One battery digital radon monitor with an e-ink screen
- C-NRPP 2024/25: Not included
- Battery
- Bluetooth
- Alarm
- Screen, app
Method: Ion chamber
First reading: Within 10 minutes
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Schoolcraft County, Bordering counties
Counties bordering Schoolcraft County
Calculated by Radon411- Radon levels in Delta CountyEPA zone 3
21.5%at or above 4 pCi/L
Median 1.7 pCi/L · 711 tests · 6.3 points above Schoolcraft County
- Radon levels in Mackinac CountyEPA zone 3
19.8%at or above 4 pCi/L
Median 1.2 pCi/L · 91 tests · 4.6 points above Schoolcraft County
- Radon levels in Alger CountyEPA zone 2
16.4%at or above 4 pCi/L
Median 1.2 pCi/L · 189 tests · 1.2 points above Schoolcraft County
- Radon levels in Luce CountyEPA zone 3
4.2%at or above 4 pCi/L
Median 1.0 pCi/L · 24 tests · 11.0 points below Schoolcraft County
Schoolcraft County, Cities and towns
Cities and towns in Schoolcraft County
The Census Bureau estimates 8,187 residents in Schoolcraft County for July 1, 2025, 138 more than in 2020 (+1.7%). Spread over its land, that is 7.0 people to the square mile. Manistique, its one incorporated place, has 2,868 residents, 35.0% of the total. CDC's 66 reported tests for 2008 to 2017 work out to 8.1 per 1,000 residents (2025 estimate), close to Michigan's 11.3.
Manistique is the one incorporated place here; CDC publishes no figure by town, so it reads Schoolcraft County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Manistique | 2,868 | +1.1% | 35.0% |
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).
Schoolcraft County, Homes
Homes in Schoolcraft County
Schoolcraft County is a place of houses on their own lots: 88% of its 5,947 homes are detached single-family houses, against 72% across Michigan. Half of its homes were built before 1972, close to Michigan's 1972: 37% date from before 1960 and 15% from 2000 or later. Owners live in 85% of the occupied homes (Michigan: 73%), so for most households a test and a fix are their own to order.
| Homes | Schoolcraft County | Michigan |
|---|---|---|
| Housing units | 5,947 | 4,599,683 |
| Detached houses | 88% | 72% |
| In buildings of 5 or more | 4% | 13% |
| Mobile homes | 5% | 5% |
| Built before 1960 | 37% | 36% |
| Built since 2000 | 15% | 15% |
| Middle year built | 1972 | 1972 |
| Owner-occupied | 85% | 73% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.