Short-term kit
RA400 short-term liquid scintillation radon test kit, lab fee included
- Lab fee included
Method: Liquid scintillation
In home: 48 to 96 hours
Locations and reports
Radon Levels in Leelanau County, Michigan
EPA puts Leelanau County in Zone 2, its middle radon zone, and most reported tests there come back low, though 7.7% of 687 (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
7.7%
19.2 pts below MI
- Leelanau
- 7.7%
- Michigan
- 26.9%
687 tests, 2008 to 2017
Median result
1.2pCi/L
Below action level
- Leelanau
- 1.2 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2008 to 2017
Tests reported
687
36th of 82 by tests
- Leelanau
- 687
- 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
76 of 82
Lowest quarter
- Leelanau
- 7.7%
- Lenawee
- 56.7%
By share, of 82 with 30+ tests
Read a result for Leelanau County
Starts at Leelanau 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. Leelanau County's median reported result, 2008 to 2017.
The data
Leelanau County, At a glance
Leelanau County at a glance
Predicted: EPA radon zone
EPA Zone 2: moderate predicted potential
Leelanau County is a
USGS geologic potential: Moderate across 79% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Leelanau County, 2008 to 2017, laboratory
Under 2 pCi/L: 73%2 to 4 pCi/L: 19%4 pCi/L and above: 8%
Of 687 pre-mitigation tests reported to CDC, not homes in this area.
| Result band | Tests Measured | Share Measured |
|---|---|---|
| Under 2 pCi/L | 500 | 72.8% |
| 2 to 4 pCi/L | 134 | 19.5% |
| 4 pCi/L and above | 53 | 7.7% |
What these figures count
These are the 687 tests reported to CDC for Leelanau 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).
Leelanau County, Compared
Leelanau County radon figures, compared
Calculated by Radon411Leelanau County reports fewer high tests than Michigan overall. 7.7% of its 687 tests over the 2008 to 2017 laboratory totals were at or above 4 pCi/L. That is 19.2 points below the 26.9% pooled from 83 Michigan counties.
Ordered from highest share down, it comes 76th 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%; Leelanau County sits 28.0 points below it.
Next door, the shares run from 8.7% in Benzie County to 11.5% in Grand Traverse County. The reported tests do not follow EPA's Zone 2 label for Leelanau County (predicted average between 2 and 4 pCi/L): 7.7% of them reached 4 pCi/L, fewer than that label suggests.
Half the tests came in under 1.2 pCi/L and half over it; the single highest reached 25.8 pCi/L. The rest split 72.8% under 2 pCi/L and 19.5% from 2 to 4 (Michigan: 46.4% and 26.7%).
CDC's ten-year totals for Leelanau County went from 534 tests (2005 to 2014) to 687 (2008 to 2017), the share going from 7.3% to 7.7%.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Leelanau County, State data
Michigan's own radon test data
MeasuredWhat Michigan's own agencies publish about radon tests in Leelanau 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 Leelanau County
Michigan EGLE publishes its figures by ZIP code, not by county. These are the 10 ZIP codes that lie wholly or partly in Leelanau County, each with the state's own figures for it. Period: About 10 years to 2026-05-15.
| ZIP code | What the state reports |
|---|---|
| 49621 | 9% greater than 4 pCi/L, median 1.2 pCi/L, 33 tests |
| 49630 | 6% greater than 4 pCi/L, median 1.1 pCi/L, 16 tests |
| 49636 | 0% greater than 4 pCi/L, median 0.0 pCi/L, 5 tests |
| 49640 | 8% greater than 4 pCi/L, median 0.8 pCi/L, 13 tests |
| 49653 | 0% greater than 4 pCi/L, median 0.9 pCi/L, 26 tests |
| 49654 | 13% greater than 4 pCi/L, median 1.1 pCi/L, 8 tests |
| 49664 | 6% greater than 4 pCi/L, median 1.7 pCi/L, 16 tests |
| 49670 | 4% greater than 4 pCi/L, median 1.0 pCi/L, 27 tests |
| 49682 | 11% greater than 4 pCi/L, median 1.6 pCi/L, 70 tests |
| 49684 | 12% greater than 4 pCi/L, median 1.4 pCi/L, 329 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.
Leelanau County, Geology
The ground under Leelanau County
PredictedMost of the ground under Leelanau County is one class on USGS's geologic map: 79.5% of its land is moderate radon potential, with 9.8% low. The map puts 79.5% of Leelanau County in the area it calls Antrim Shale and 9.8% 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 | 79.5% |
| North-Central Michigan Basin | Sandy and silty glacial deposits derived from sandstones, gray shales, limestones, and dolomites. | Low | 8 | 9.8% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Leelanau County beside the ground around it
Across Michigan 9.6% of the land is rated high; none of Leelanau County's is. Of the 2 counties that border it, none has as large a share of moderate-potential ground; Grand Traverse County comes nearest at 22.7%.
The map rates the ground, not the air in any home.
Local help
Leelanau County, Local resources
Radon testing and mitigation in Leelanau County
Listed radon businesses with an address in Leelanau 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: Traverse City, Suttons Bay
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
Leelanau County, Questions
Questions about radon in Leelanau County
Are radon levels high in Leelanau County?
Over the 2008 to 2017 laboratory totals, 7.7% of the radon tests reported to CDC for Leelanau 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, 75 reported a higher share; pooled, the state comes to 26.9%.
Which counties border Leelanau County?
Leelanau County borders 2 counties: Grand Traverse County and Benzie County.
Products
Leelanau County, Products
Testing a home in Leelanau County
In Leelanau County, 7.7% of 687 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 Leelanau 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
Monitor
RadonPro Wi-Fi radon monitor with a built-in Geiger counter
- C-NRPP 2024/25: Not included
- Plug-in
- Wi-Fi
- Alarm
- Screen, app
First reading: Within 5 minutes
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Leelanau County, Bordering counties
Counties bordering Leelanau County
Calculated by Radon411- Radon levels in Grand Traverse CountyEPA zone 3
11.5%at or above 4 pCi/L
Median 1.4 pCi/L · 1,614 tests · 3.8 points above Leelanau County
- Radon levels in Benzie CountyEPA zone 3
8.7%at or above 4 pCi/L
Median 1.3 pCi/L · 334 tests · 1.0 points above Leelanau County
Leelanau County, Cities and towns
Cities and towns in Leelanau County
The Census Bureau estimates 22,982 residents in Leelanau County for July 1, 2025, 670 more than in 2020 (+3.0%). That works out to 66 people per square mile of land. Traverse City, the largest place on its list (15,832 residents in all), extends beyond Leelanau County, so no share of the total is worked out for it. Testing is reported here more often than across the state: CDC's 687 reported tests for 2008 to 2017 come to 29.9 for every 1,000 residents (2025 estimate), against 11.3 for Michigan.
From Traverse City to Empire, CDC publishes no figure by town: each reads Leelanau County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Traverse Cityextends beyond Leelanau County | 15,832 | +1.0% | Counted whole |
| Suttons Bay | 587 | +2.6% | 2.6% |
| Northport | 503 | +2.7% | 2.2% |
| Empire | 355 | +2.6% | 1.5% |
4 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). A place that extends beyond Leelanau County is counted whole, so it has no share.
Leelanau County, Homes
Homes in Leelanau County
Leelanau County is a place of houses on their own lots: 86% of its 15,630 homes are detached single-family houses, against 72% across Michigan. Much of Leelanau County is recent building: 26% of its homes have gone up since 2000 and the middle year built is 1987, against 1972 for Michigan. Owners live in 91% of the occupied homes (Michigan: 73%), so for most households a test and a fix are their own to order.
| Homes | Leelanau County | Michigan |
|---|---|---|
| Housing units | 15,630 | 4,599,683 |
| Detached houses | 86% | 72% |
| In buildings of 5 or more | 2% | 13% |
| Mobile homes | 2% | 5% |
| Built before 1960 | 17% | 36% |
| Built since 2000 | 26% | 15% |
| Middle year built | 1987 | 1972 |
| Owner-occupied | 91% | 73% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.