Short-term kit
RA100 short-term liquid scintillation radon test kit
- Lab fee extra
Method: Liquid scintillation
In home: 48 to 96 hours
Locations and reports
Radon Levels in Gogebic County, Michigan
EPA puts Gogebic County in Zone 2, its middle radon zone, and most reported tests there come back low, though 12.9% of 171 (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
12.9%
14.0 pts below MI
- Gogebic
- 12.9%
- Michigan
- 26.9%
171 tests, 2008 to 2017
Median result
1.2pCi/L
Below action level
- Gogebic
- 1.2 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2008 to 2017
Tests reported
171
70th of 82 by tests
- Gogebic
- 171
- Oakland
- 16,224
Reported to CDC before any fix, 2008 to 2017
EPA radon zone
Zone 2
Moderate potential
- 1
- Zone 2
- 3
1 highest, 3 lowest
EPA predicts 2 to 4 pCi/L indoors
Rank in Michigan
58 of 82
Middle half
- Gogebic
- 12.9%
- Lenawee
- 56.7%
By share, of 82 with 30+ tests
Read a result for Gogebic County
Starts at Gogebic County's median, 1.2 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 1.2 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. Gogebic County's median reported result, 2008 to 2017.
The data
Gogebic County, At a glance
Gogebic County at a glance
Predicted: EPA radon zone
EPA Zone 2: moderate predicted potential
Gogebic County is a
USGS geologic potential: Moderate across 84% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Gogebic County, 2008 to 2017, laboratory
Under 2 pCi/L: 67%2 to 4 pCi/L: 20%4 pCi/L and above: 13%
Of 171 pre-mitigation tests reported to CDC, not homes in this area.
| Result band | Tests Measured | Share Measured |
|---|---|---|
| Under 2 pCi/L | 115 | 67.3% |
| 2 to 4 pCi/L | 34 | 19.9% |
| 4 pCi/L and above | 22 | 12.9% |
What these figures count
These are the 171 tests reported to CDC for Gogebic 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).
Gogebic County, Compared
Gogebic County radon figures, compared
Calculated by Radon411Gogebic County reports fewer high tests than Michigan overall. 12.9% of its 171 tests over the 2008 to 2017 laboratory totals were at or above 4 pCi/L. That is 14.0 points below the 26.9% pooled from 83 Michigan counties.
Ordered from highest share down, it comes 58th 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%; Gogebic County sits 22.8 points below it.
Next door, the shares run from 11.4% in Ontonagon County to 36.2% in Iron County, with Ontonagon County below Gogebic County. Zone 2 on EPA's map (predicted average between 2 and 4 pCi/L) and a 12.9% share point the same way here.
Half the tests came in under 1.2 pCi/L and half over it; the single highest reached 13.1 pCi/L. The rest split 67.3% under 2 pCi/L and 19.9% from 2 to 4 (Michigan: 46.4% and 26.7%).
CDC's ten-year totals for Gogebic County went from 195 tests (2005 to 2014) to 171 (2008 to 2017), the share going from 11.8% to 12.9%.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Gogebic County, State data
Michigan's own radon test data
MeasuredWhat Michigan's own agencies publish about radon tests in Gogebic 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 Gogebic County
Michigan EGLE publishes its figures by ZIP code, not by county. These are the 6 ZIP codes that lie wholly or partly in Gogebic County, each with the state's own figures for it. Period: About 10 years to 2026-05-15.
| ZIP code | What the state reports |
|---|---|
| 49911 | 13% greater than 4 pCi/L, median 1.9 pCi/L, 40 tests |
| 49938 | 13% greater than 4 pCi/L, median 1.4 pCi/L, 75 tests |
| 49947 | 3 tests, figures not shown |
| 49959 | 9% greater than 4 pCi/L, median 2.1 pCi/L, 11 tests |
| 49968 | 0% greater than 4 pCi/L, median 0.3 pCi/L, 12 tests |
| 49969 | 27% greater than 4 pCi/L, median 1.7 pCi/L, 11 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.
Gogebic County, Geology
The ground under Gogebic County
PredictedMost of the ground under Gogebic County is one class on USGS's geologic map: 83.7% of its land is moderate radon potential, with 16.3% low. The map puts 83.2% of Gogebic County in the area it calls Marquette Highland/Keweenaw Peninsula/Gogebic Range and 16.3% in Glacial Lakes. USGS gives the first a radon index of 11, in the moderate band (9 to 11), and the second 7, in the low band (5 to 8).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Marquette Highland/Keweenaw Peninsula/Gogebic Range | Granite, iron formtion, sandstone, conglomerate, metamorphic rocks, and glacial drift. | Moderate | 11 | 83.2% |
| Glacial Lakes | Silt and clay glacial lake deposits. | Low | 7 | 16.3% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Gogebic County beside the ground around it
Across Michigan 9.6% of the land is rated high; none of Gogebic County's is. Of the 4 counties that border it, 3 have more moderate-potential ground, Iron County the most at 100%.
The map rates the ground, not the air in any home.
Local help
Gogebic County, Local resources
Radon testing and mitigation in Gogebic 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
Gogebic County, Questions
Questions about radon in Gogebic County
Are radon levels high in Gogebic County?
Over the 2008 to 2017 laboratory totals, 12.9% of the radon tests reported to CDC for Gogebic County, Michigan were at or above 4 pCi/L, and the median reported pre-mitigation result was 1.2 pCi/L. Of 82 Michigan counties with 30 or more tests for the same period, 57 reported a higher share; pooled, the state comes to 26.9%.
Which counties border Gogebic County?
Gogebic County borders 4 counties: Iron County, WI, Ontonagon County, MI, Vilas County, WI and Iron County, MI.
Products
Gogebic County, Products
Testing a home in Gogebic County
In Gogebic County, 12.9% of 171 tests reported to CDC over the 2008 to 2017 laboratory totals reached 4 pCi/L, against 26.9% pooled across Michigan. In Zone 2 a short-term kit (2 to 90 days) is the quick first check in Gogebic County; a long-term test tells the year-round average.
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
MonitorAEGTEST
HOUND-3699 radon monitor with a 2.1-inch touchscreen
- C-NRPP 2024/25: Not included
- Battery
- Alarm
- Screen
First reading: Within 1 hour
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Gogebic County, Bordering counties
Counties bordering Gogebic County
Calculated by Radon411- Radon levels in Iron County, MIEPA zone 2
36.2%at or above 4 pCi/L
Median 2.6 pCi/L · 265 tests · 23.3 points above Gogebic County
- Radon levels in Vilas County, WIEPA zone 2
35.7%at or above 4 pCi/L
Median 2.9 pCi/L · 507 tests · 22.8 points above Gogebic County
- Radon levels in Iron County, WIEPA zone 2
28.6%at or above 4 pCi/L
Median 2.0 pCi/L · 42 tests · 15.7 points above Gogebic County
- Radon levels in Ontonagon County, MIEPA zone 3
11.4%at or above 4 pCi/L
Median 1.3 pCi/L · 123 tests · 1.5 points below Gogebic County
Gogebic County, Cities and towns
Cities and towns in Gogebic County
Gogebic County's population has barely moved since 2020: 14,285 residents on July 1, 2025 against 14,349 then, by the Census Bureau's estimates. That works out to 13 people per square mile of land. Its largest town, Ironwood, has 4,950 residents, 34.7% of the total. Together its 3 incorporated places hold 59.0% of those residents; the other 41.0% live outside any of them. CDC's 171 reported tests for 2008 to 2017 work out to 12.0 per 1,000 residents (2025 estimate), close to Michigan's 11.3.
From Ironwood to Wakefield, CDC publishes no figure by town: each reads Gogebic County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Ironwood | 4,950 | −1.5% | 34.7% |
| Bessemer | 1,787 | −0.9% | 12.5% |
| Wakefield | 1,689 | −0.8% | 11.8% |
3 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).
Gogebic County, Homes
Homes in Gogebic County
Gogebic County is a place of houses on their own lots: 88% of its 10,400 homes are detached single-family houses, against 72% across Michigan. The homes are older than Michigan's as a whole: half were built before 1954 (1972 for Michigan), and 57% date from before 1960. Owners live in 81% of the occupied homes (Michigan: 73%), so for most households a test and a fix are their own to order.
| Homes | Gogebic County | Michigan |
|---|---|---|
| Housing units | 10,400 | 4,599,683 |
| Detached houses | 88% | 72% |
| In buildings of 5 or more | 5% | 13% |
| Mobile homes | 2% | 5% |
| Built before 1960 | 57% | 36% |
| Built since 2000 | 7% | 15% |
| Middle year built | 1954 | 1972 |
| Owner-occupied | 81% | 73% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.