Short-term kitFirst Alert
RD1 short-term charcoal radon test kit
- Lab fee included
Method: Charcoal
In home: 2 to 4 days
Locations and reports
Radon Levels in Dickinson County, Michigan
EPA puts Dickinson County in Zone 2, its middle radon zone, and 39.3% of its 843 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
39.3%
12.4 pts above MI
- Dickinson
- 39.3%
- Michigan
- 26.9%
843 tests, 2008 to 2017
Median result
3.1pCi/L
Below action level
- Dickinson
- 3.1 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2008 to 2017
Tests reported
843
32nd of 82 by tests
- Dickinson
- 843
- 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
7 of 82
Top quarter
- Dickinson
- 39.3%
- Lenawee
- 56.7%
By share, of 82 with 30+ tests
Read a result for Dickinson County
Starts at Dickinson County's median, 3.1 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 3.1 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. Dickinson County's median reported result, 2008 to 2017.
The data
Dickinson County, At a glance
Dickinson County at a glance
Predicted: EPA radon zone
EPA Zone 2: moderate predicted potential
Dickinson County is a
USGS geologic potential: Moderate across 100% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Dickinson County, 2008 to 2017, laboratory
Under 2 pCi/L: 28%2 to 4 pCi/L: 33%4 pCi/L and above: 39%
Of 843 pre-mitigation tests reported to CDC, not homes in this area.
| Result band | Tests Measured | Share Measured |
|---|---|---|
| Under 2 pCi/L | 234 | 27.8% |
| 2 to 4 pCi/L | 278 | 33.0% |
| 4 pCi/L and above | 331 | 39.3% |
What these figures count
These are the 843 tests reported to CDC for Dickinson 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).
Dickinson County, Compared
Dickinson County radon figures, compared
Calculated by Radon411In Dickinson County, about 4 in 10 reported tests over the 2008 to 2017 laboratory totals (331 of 843) were at or above EPA's action level. Against the national pool of 35.7%, the gap is 3.6 points higher. Across 83 Michigan counties pooled together, 26.9% of tests reached that level, so Dickinson County runs 12.4 points above its state.
Of 5 neighbours with a figure, 1 reported a larger share at or above 4 pCi/L and 4 a smaller one; the spread is 11.7% (Menominee County) to 52.1% (Florence County, WI). By share, Dickinson County is 7th of 82 Michigan counties with 30 or more tests for the same period.
Half the tests came in under 3.1 pCi/L and half over it; the single highest reached 41.8 pCi/L. Below the action level, 234 tests (27.8%) came in under 2 pCi/L, against 46.4% statewide, and 278 tests (33.0%) fell between 2 and 4, against 26.7% statewide.
Zone 2 on EPA's map (predicted average between 2 and 4 pCi/L) and a 39.3% share point the same way here. USGS geology rates 100% of the county's land moderate radon potential. CDC also counts 19 tests taken after mitigation in Dickinson County for the same period: tests in homes where a fix was already in.
CDC's ten-year totals for Dickinson County went from 625 tests (2005 to 2014) to 843 (2008 to 2017), the share going from 37.1% to 39.3%.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Dickinson County, State data
Michigan's own radon test data
MeasuredWhat Michigan's own agencies publish about radon tests in Dickinson 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 Dickinson County
Michigan EGLE publishes its figures by ZIP code, not by county. These are the 10 ZIP codes that lie wholly or partly in Dickinson County, each with the state's own figures for it. Period: About 10 years to 2026-05-15.
| ZIP code | What the state reports |
|---|---|
| 49801 | 33% greater than 4 pCi/L, median 2.5 pCi/L, 233 tests |
| 49802 | 41% greater than 4 pCi/L, median 3.1 pCi/L, 123 tests |
| 49815 | 43% greater than 4 pCi/L, median 1.5 pCi/L, 7 tests |
| 49831 | 0% greater than 4 pCi/L, median 1.9 pCi/L, 6 tests |
| 49834 | 18% greater than 4 pCi/L, median 2.5 pCi/L, 11 tests |
| 49852 | 2 tests, figures not shown |
| 49870 | 35% greater than 4 pCi/L, median 2.8 pCi/L, 57 tests |
| 49876 | 85% greater than 4 pCi/L, median 8.0 pCi/L, 33 tests |
| 49881 | 1 tests, figures not shown |
| 49892 | 31% greater than 4 pCi/L, median 3.4 pCi/L, 29 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.
Dickinson County, Geology
The ground under Dickinson County
PredictedUSGS's geologic map puts all of Dickinson County's mapped land in one class: moderate radon potential. The map puts 56.8% of Dickinson County in the area it calls Marquette Highland/Keweenaw Peninsula/Gogebic Range and 43.0% in Outer Michigan Basin. USGS gives the first a radon index of 11 and the second 10, both in the moderate band (9 to 11).
| 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 | 56.8% |
| Outer Michigan Basin | Glacial deposits derived from Paleozoic carbonate rocks and sandstones. | Moderate | 10 | 43.0% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Dickinson County beside the ground around it
Across Michigan 9.6% of the land is rated high; none of Dickinson County's is. Of the 5 counties that border it, 1 has more high-potential ground, Marinette County, WI the most at 4.1%.
The map rates the ground, not the air in any home.
Local help
Dickinson County, Local resources
Radon testing and mitigation in Dickinson County
Listed radon businesses with an address in Dickinson 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.
Listed radon professionals by town: Kingsford
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
Dickinson County, Questions
Questions about radon in Dickinson County
Are radon levels high in Dickinson County?
Over the 2008 to 2017 laboratory totals, 39.3% of the radon tests reported to CDC for Dickinson County, Michigan were at or above 4 pCi/L, and the median reported pre-mitigation result was 3.1 pCi/L. Of 82 Michigan counties with 30 or more tests for the same period, 6 reported a higher share; pooled, the state comes to 26.9%.
Which counties border Dickinson County?
Dickinson County borders 5 counties: Florence County, WI, Menominee County, MI, Iron County, MI, Marquette County, MI and Marinette County, WI.
Products
Dickinson County, Products
Testing a home in Dickinson County
In Dickinson County, 39.3% of 843 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 Dickinson 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
MonitorPYZYCKYH
RD17 plug-in radon detector with a rechargeable battery and color screen
- C-NRPP 2024/25: Not included
- Battery
- Alarm
- Screen
Method: Semiconductor sensor
First reading: Within 6 hours
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Dickinson County, Bordering counties
Counties bordering Dickinson County
Calculated by Radon411- Radon levels in Florence County, WIEPA zone 2
52.1%at or above 4 pCi/L
Median 4.3 pCi/L · 165 tests · 12.8 points above Dickinson County
- Radon levels in Iron County, MIEPA zone 2
36.2%at or above 4 pCi/L
Median 2.6 pCi/L · 265 tests · 3.1 points below Dickinson County
- Radon levels in Marinette County, WIEPA zone 2
27.9%at or above 4 pCi/L
Median 2.2 pCi/L · 391 tests · 11.4 points below Dickinson County
- Radon levels in Marquette County, MIEPA zone 2
23.4%at or above 4 pCi/L
Median 2.0 pCi/L · 1,082 tests · 15.9 points below Dickinson County
- Radon levels in Menominee County, MIEPA zone 2
11.7%at or above 4 pCi/L
Median 1.2 pCi/L · 120 tests · 27.6 points below Dickinson County
Dickinson County, Cities and towns
Cities and towns in Dickinson County
Dickinson County's population has barely moved since 2020: 25,827 residents on July 1, 2025 against 25,896 then, by the Census Bureau's estimates. That works out to 34 people per square mile of land. Its largest town, Iron Mountain, has 7,469 residents, 28.9% of the total. Together its 3 incorporated places hold 59.6% of those residents; the other 40.4% live outside any of them. Testing is reported here more often than across the state: CDC's 843 reported tests for 2008 to 2017 come to 32.6 for every 1,000 residents (2025 estimate), against 11.3 for Michigan.
From Iron Mountain to Norway, CDC publishes no figure by town: each reads Dickinson County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Iron Mountain | 7,469 | −0.5% | 28.9% |
| Kingsford | 5,096 | −0.6% | 19.7% |
| Norway | 2,815 | −0.5% | 10.9% |
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).
Dickinson County, Homes
Homes in Dickinson County
Dickinson County is a place of houses on their own lots: 82% of its 13,941 homes are detached single-family houses, against 72% across Michigan. Half of its homes were built before 1970, close to Michigan's 1972: 40% date from before 1960 and 10% from 2000 or later. Owners live in 82% of the occupied homes (Michigan: 73%), so for most households a test and a fix are their own to order.
| Homes | Dickinson County | Michigan |
|---|---|---|
| Housing units | 13,941 | 4,599,683 |
| Detached houses | 82% | 72% |
| In buildings of 5 or more | 8% | 13% |
| Mobile homes | 5% | 5% |
| Built before 1960 | 40% | 36% |
| Built since 2000 | 10% | 15% |
| Middle year built | 1970 | 1972 |
| Owner-occupied | 82% | 73% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.