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 Lake County, Michigan
EPA puts Lake County in Zone 3, its lowest radon zone, and most reported tests there come back low, though 14.9% of 94 (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
14.9%
12.0 pts below MI
- Lake
- 14.9%
- Michigan
- 26.9%
94 tests, 2008 to 2017
Median result
1.4pCi/L
Below action level
- Lake
- 1.4 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2008 to 2017
Tests reported
94
77th of 82 by tests
- Lake
- 94
- 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
51 of 82
Middle half
- Lake
- 14.9%
- Lenawee
- 56.7%
By share, of 82 with 30+ tests
Read a result for Lake County
Starts at Lake County's median, 1.4 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 1.4 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. Lake County's median reported result, 2008 to 2017.
The data
Lake County, At a glance
Lake County at a glance
Predicted: EPA radon zone
EPA Zone 3: lower predicted potential
USGS geologic potential: Low across 100% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Lake County, 2008 to 2017, laboratory
Under 2 pCi/L: 67%2 to 4 pCi/L: 18%4 pCi/L and above: 15%
Of 94 pre-mitigation tests reported to CDC, not homes in this area.
| Result band | Tests Measured | Share Measured |
|---|---|---|
| Under 2 pCi/L | 63 | 67.0% |
| 2 to 4 pCi/L | 17 | 18.1% |
| 4 pCi/L and above | 14 | 14.9% |
What these figures count
These are the 94 tests reported to CDC for Lake 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).
Lake County, Compared
Lake County radon figures, compared
Calculated by Radon411Lake County reports fewer high tests than Michigan overall. 14.9% of its 94 tests over the 2008 to 2017 laboratory totals were at or above 4 pCi/L. That is 12.0 points below the 26.9% pooled from 83 Michigan counties.
Ordered from highest share down, it comes 51st 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%; Lake County sits 20.8 points below it.
Next door, the shares run from 5.9% in Oceana County to 21.7% in Mecosta County, with Osceola County, Wexford County and Newaygo County below Lake County. Zone 3 on EPA's map (predicted average under 2 pCi/L) and a 14.9% share point the same way here.
Half the tests came in under 1.4 pCi/L and half over it; the single highest reached 7.1 pCi/L. The rest split 67.0% under 2 pCi/L and 18.1% from 2 to 4 (Michigan: 46.4% and 26.7%).
CDC's ten-year totals for Lake County went from 119 tests (2005 to 2014) to 94 (2008 to 2017), the share going from 13.4% to 14.9%.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Lake County, State data
Michigan's own radon test data
MeasuredWhat Michigan's own agencies publish about radon tests in Lake 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 Lake County
Michigan EGLE publishes its figures by ZIP code, not by county. These are the 10 ZIP codes that lie wholly or partly in Lake County, each with the state's own figures for it. Period: About 10 years to 2026-05-15.
| ZIP code | What the state reports |
|---|---|
| 49304 | 0% greater than 4 pCi/L, median 1.1 pCi/L, 17 tests |
| 49309 | 0% greater than 4 pCi/L, median 0.0 pCi/L, 5 tests |
| 49402 | 0% greater than 4 pCi/L, median 1.9 pCi/L, 12 tests |
| 49601 | 6% greater than 4 pCi/L, median 1.4 pCi/L, 136 tests |
| 49623 | 3 tests, figures not shown |
| 49644 | 35% greater than 4 pCi/L, median 3.0 pCi/L, 17 tests |
| 49655 | 11% greater than 4 pCi/L, median 1.3 pCi/L, 9 tests |
| 49656 | 15% greater than 4 pCi/L, median 1.6 pCi/L, 13 tests |
| 49677 | 8% greater than 4 pCi/L, median 1.1 pCi/L, 39 tests |
| 49688 | 6% greater than 4 pCi/L, median 1.1 pCi/L, 16 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.
Lake County, Geology
The ground under Lake County
PredictedUSGS's geologic map puts all of Lake County's mapped land in one class: low radon potential. The map puts 78.1% of Lake County in the area it calls Lake Michigan Lobe Deposits and 21.9% in North-Central Michigan Basin. USGS gives both a radon index of 8, in the low band (5 to 8).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Lake Michigan Lobe Deposits | Sandy to clayey glacial deposits and some glacial lake deposits. | Low | 8 | 78.1% |
| North-Central Michigan Basin | Sandy and silty glacial deposits derived from sandstones, gray shales, limestones, and dolomites. | Low | 8 | 21.9% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Lake County beside the ground around it
Across Michigan 9.6% of the land is rated high; none of Lake County's is. Of the 7 counties that border it, 2 have more moderate-potential ground, Mecosta County the most at 20.7%.
The map rates the ground, not the air in any home.
Local help
Lake County, Local resources
Radon testing and mitigation in Lake 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
Lake County, Questions
Questions about radon in Lake County
Are radon levels high in Lake County?
Over the 2008 to 2017 laboratory totals, 14.9% of the radon tests reported to CDC for Lake County, Michigan were at or above 4 pCi/L, and the median reported pre-mitigation result was 1.4 pCi/L. Of 82 Michigan counties with 30 or more tests for the same period, 50 reported a higher share; pooled, the state comes to 26.9%.
Which counties border Lake County?
Lake County borders 7 counties: Mason County, Osceola County, Wexford County, Newaygo County, Manistee County, Mecosta County and Oceana County.
Products
Lake County, Products
Testing a home in Lake County
In Lake County, 14.9% of 94 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 Lake County.
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
MonitorAEGTEST
HOUND-1011 rechargeable radon detector with a 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
Lake County, Bordering counties
Counties bordering Lake County
Calculated by Radon411- Radon levels in Mecosta CountyEPA zone 3
21.7%at or above 4 pCi/L
Median 2.0 pCi/L · 614 tests · 6.8 points above Lake County
- Radon levels in Manistee CountyEPA zone 3
16.5%at or above 4 pCi/L
Median 1.6 pCi/L · 388 tests · 1.6 points above Lake County
- Radon levels in Osceola CountyEPA zone 3
10.6%at or above 4 pCi/L
Median 1.7 pCi/L · 246 tests · 4.3 points below Lake County
- Radon levels in Wexford CountyEPA zone 3
9.7%at or above 4 pCi/L
Median 1.5 pCi/L · 621 tests · 5.2 points below Lake County
- Radon levels in Newaygo CountyEPA zone 3
7.9%at or above 4 pCi/L
Median 1.3 pCi/L · 467 tests · 7.0 points below Lake County
- Radon levels in Mason CountyEPA zone 3
6.3%at or above 4 pCi/L
Median 1.1 pCi/L · 462 tests · 8.6 points below Lake County
- Radon levels in Oceana CountyEPA zone 3
5.9%at or above 4 pCi/L
Median 1.2 pCi/L · 338 tests · 9.0 points below Lake County
Lake County, Cities and towns
Cities and towns in Lake County
Lake County is growing: the Census Bureau puts it at 13,182 residents on July 1, 2025, up 9.1% from 12,086 in 2020. That works out to 23 people per square mile of land. No town dominates: Baldwin, the largest, has 1,025 residents, 7.8% of the total. Together its 2 incorporated places hold 10.3% of those residents; the other 89.7% live outside any of them. Reported testing is thin here: 94 tests over 2008 to 2017, or 7.1 for every 1,000 residents (2025 estimate), where Michigan as a whole comes to 11.3.
From Baldwin to Luther, CDC publishes no figure by town: each reads Lake County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Baldwin | 1,025 | +7.3% | 7.8% |
| Luther | 328 | +7.2% | 2.5% |
2 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).
Lake County, Homes
Homes in Lake County
Of Lake County's 13,432 homes, 70% are detached houses, against 72% across Michigan; 27% are mobile homes. Half of its homes were built before 1977, close to Michigan's 1972: 24% date from before 1960 and 15% from 2000 or later. 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 | Lake County | Michigan |
|---|---|---|
| Housing units | 13,432 | 4,599,683 |
| Detached houses | 70% | 72% |
| In buildings of 5 or more | 1% | 13% |
| Mobile homes | 27% | 5% |
| Built before 1960 | 24% | 36% |
| Built since 2000 | 15% | 15% |
| Middle year built | 1977 | 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.