Short-term kitempowerDX
Standard Radon Test short-term mail-in radon test kit
- Lab fee included
Method: Passive sampler
In home: 48 to 96 hours
Locations and reports
Radon Levels in Antrim County, Michigan
EPA puts Antrim County in Zone 2, its middle radon zone, and most reported tests there come back low, though 12.0% of 343 (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
12.0%
14.9 pts below MI
- Antrim
- 12.0%
- Michigan
- 26.9%
343 tests, 2008 to 2017
Median result
1.5pCi/L
Below action level
- Antrim
- 1.5 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2008 to 2017
Tests reported
343
55th of 82 by tests
- Antrim
- 343
- 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
61 of 82
Middle half
- Antrim
- 12.0%
- Lenawee
- 56.7%
By share, of 82 with 30+ tests
Read a result for Antrim County
Starts at Antrim County's median, 1.5 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 1.5 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. Antrim County's median reported result, 2008 to 2017.
The data
Antrim County, At a glance
Antrim County at a glance
Predicted: EPA radon zone
EPA Zone 2: moderate predicted potential
Antrim County is a
USGS geologic potential: Moderate across 78% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Antrim County, 2008 to 2017, laboratory
Under 2 pCi/L: 63%2 to 4 pCi/L: 25%4 pCi/L and above: 12%
Of 343 pre-mitigation tests reported to CDC, not homes in this area.
| Result band | Tests Measured | Share Measured |
|---|---|---|
| Under 2 pCi/L | 216 | 63.0% |
| 2 to 4 pCi/L | 86 | 25.1% |
| 4 pCi/L and above | 41 | 12.0% |
What these figures count
These are the 343 tests reported to CDC for Antrim 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).
Antrim County, Compared
Antrim County radon figures, compared
Calculated by Radon411Antrim County reports fewer high tests than Michigan overall. 12.0% of its 343 tests over the 2008 to 2017 laboratory totals were at or above 4 pCi/L. That is 14.9 points below the 26.9% pooled from 83 Michigan counties.
Ordered from highest share down, it comes 61st 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%; Antrim County sits 23.7 points below it.
Next door, the shares run from 6.2% in Crawford County to 38.2% in Otsego County, with Grand Traverse County, Charlevoix County and Crawford County below Antrim County. Zone 2 on EPA's map (predicted average between 2 and 4 pCi/L) and a 12.0% share point the same way here.
Half the tests came in under 1.5 pCi/L and half over it; the single highest reached 17.9 pCi/L. The rest split 63.0% under 2 pCi/L and 25.1% from 2 to 4 (Michigan: 46.4% and 26.7%).
CDC's ten-year totals for Antrim County went from 355 tests (2005 to 2014) to 343 (2008 to 2017), the share going from 9.0% to 12.0%.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Antrim County, State data
Michigan's own radon test data
MeasuredWhat Michigan's own agencies publish about radon tests in Antrim 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 Antrim County
Michigan EGLE publishes its figures by ZIP code, not by county. These are the 14 ZIP codes that lie wholly or partly in Antrim County, each with the state's own figures for it. Period: About 10 years to 2026-05-15.
| ZIP code | What the state reports |
|---|---|
| 49612 | 5% greater than 4 pCi/L, median 1.2 pCi/L, 19 tests |
| 49615 | 6% greater than 4 pCi/L, median 1.2 pCi/L, 50 tests |
| 49622 | 0% greater than 4 pCi/L, median 1.2 pCi/L, 13 tests |
| 49629 | 5% greater than 4 pCi/L, median 0.3 pCi/L, 21 tests |
| 49648 | 0% greater than 4 pCi/L, median 0.9 pCi/L, 25 tests |
| 49659 | 12% greater than 4 pCi/L, median 1.9 pCi/L, 25 tests |
| 49676 | 4% greater than 4 pCi/L, median 1.0 pCi/L, 23 tests |
| 49690 | 11% greater than 4 pCi/L, median 1.8 pCi/L, 63 tests |
| 49712 | 9% greater than 4 pCi/L, median 1.5 pCi/L, 100 tests |
| 49713 | 31% greater than 4 pCi/L, median 2.3 pCi/L, 13 tests |
| 49720 | 10% greater than 4 pCi/L, median 1.5 pCi/L, 171 tests |
| 49727 | 5% greater than 4 pCi/L, median 1.4 pCi/L, 41 tests |
| 49729 | 0% greater than 4 pCi/L, median 1.4 pCi/L, 10 tests |
| 49730 | 40% greater than 4 pCi/L, median 3.4 pCi/L, 30 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.
Antrim County, Geology
The ground under Antrim County
PredictedMost of the ground under Antrim County is one class on USGS's geologic map: 77.6% of its land is moderate radon potential, with 22.4% low. The map puts 77.6% of Antrim County in the area it calls Antrim Shale and 22.4% in North-Central Michigan Basin. USGS gives the first a radon index of 10, in the moderate band (9 to 11), and the second 8, in the low band (5 to 8).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Antrim Shale | Glacial deposits dervied in part from Antrim black shale. | Moderate | 10 | 77.6% |
| North-Central Michigan Basin | Sandy and silty glacial deposits derived from sandstones, gray shales, limestones, and dolomites. | Low | 8 | 22.4% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Antrim County beside the ground around it
Across Michigan 9.6% of the land is rated high; none of Antrim County's is. Of the 5 counties that border it, 1 has more moderate-potential ground, Charlevoix County the most at 83.2%.
The map rates the ground, not the air in any home.
Local help
Antrim County, Local resources
Radon testing and mitigation in Antrim 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
Antrim County, Questions
Questions about radon in Antrim County
Are radon levels high in Antrim County?
Over the 2008 to 2017 laboratory totals, 12.0% of the radon tests reported to CDC for Antrim County, Michigan were at or above 4 pCi/L, and the median reported pre-mitigation result was 1.5 pCi/L. Of 82 Michigan counties with 30 or more tests for the same period, 60 reported a higher share; pooled, the state comes to 26.9%.
Which counties border Antrim County?
Antrim County borders 5 counties: Charlevoix County, Kalkaska County, Otsego County, Grand Traverse County and Crawford County.
Products
Antrim County, Products
Testing a home in Antrim County
In Antrim County, 12.0% of 343 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 Antrim County; a long-term test tells the year-round average.
Test kits and monitors3
See every kit and monitor
Long-term kit
RL416 long-term radon test kit, lab fee included
- Lab fee included
Method: Alpha track
In home: 90 days to 12 months
MonitorKidde
Radon Detector (RAB) battery digital radon detector with an alarm
- C-NRPP 2024/25: Not included
- Battery
- Alarm
- Screen
Method: Semiconductor sensor
First reading: Within 12 hours
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Antrim County, Bordering counties
Counties bordering Antrim County
Calculated by Radon411- Radon levels in Otsego CountyEPA zone 2
38.2%at or above 4 pCi/L
Median 3.2 pCi/L · 1,080 tests · 26.2 points above Antrim County
- Radon levels in Kalkaska CountyEPA zone 3
12.7%at or above 4 pCi/L
Median 1.3 pCi/L · 204 tests · 0.7 points above Antrim County
- Radon levels in Grand Traverse CountyEPA zone 3
11.5%at or above 4 pCi/L
Median 1.4 pCi/L · 1,614 tests · 0.5 points below Antrim County
- Radon levels in Charlevoix CountyEPA zone 2
9.8%at or above 4 pCi/L
Median 1.4 pCi/L · 502 tests · 2.2 points below Antrim County
- Radon levels in Crawford CountyEPA zone 3
6.2%at or above 4 pCi/L
Median 1.3 pCi/L · 194 tests · 5.8 points below Antrim County
Antrim County, Cities and towns
Cities and towns in Antrim County
Antrim County is growing: the Census Bureau puts it at 24,698 residents on July 1, 2025, up 5.3% from 23,457 in 2020. That works out to 52 people per square mile of land. No town dominates: Elk Rapids, the largest, has 1,610 residents, 6.5% of the total. Together its 5 incorporated places hold 21.9% of those residents; the other 78.1% live outside any of them. CDC's 343 reported tests for 2008 to 2017 work out to 13.9 per 1,000 residents (2025 estimate), close to Michigan's 11.3.
From Elk Rapids to Ellsworth, CDC publishes no figure by town: each reads Antrim County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Elk Rapids | 1,610 | +5.0% | 6.5% |
| Mancelona | 1,399 | +5.0% | 5.7% |
| Bellaire | 1,059 | +5.0% | 4.3% |
| Central Lake | 987 | +5.0% | 4.0% |
| Ellsworth | 365 | +4.9% | 1.5% |
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).
Antrim County, Homes
Homes in Antrim County
Antrim County is a place of houses on their own lots: 84% of its 17,613 homes are detached single-family houses, against 72% across Michigan. Half of its homes were built before 1979, close to Michigan's 1972: 25% date from before 1960 and 19% from 2000 or later. Owners live in 87% of the occupied homes (Michigan: 73%), so for most households a test and a fix are their own to order.
| Homes | Antrim County | Michigan |
|---|---|---|
| Housing units | 17,613 | 4,599,683 |
| Detached houses | 84% | 72% |
| In buildings of 5 or more | 5% | 13% |
| Mobile homes | 7% | 5% |
| Built before 1960 | 25% | 36% |
| Built since 2000 | 19% | 15% |
| Middle year built | 1979 | 1972 |
| Owner-occupied | 87% | 73% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.