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 Lapeer County, Michigan
EPA puts Lapeer County in Zone 2, its middle radon zone, and 33.4% of its 649 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
33.4%
6.5 pts above MI
- Lapeer
- 33.4%
- Michigan
- 26.9%
649 tests, 2008 to 2017
Median result
2.7pCi/L
Below action level
- Lapeer
- 2.7 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2008 to 2017
Tests reported
649
37th of 82 by tests
- Lapeer
- 649
- 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
16 of 82
Top quarter
- Lapeer
- 33.4%
- Lenawee
- 56.7%
By share, of 82 with 30+ tests
Read a result for Lapeer County
Starts at Lapeer County's median, 2.7 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 2.7 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. Lapeer County's median reported result, 2008 to 2017.
The data
Lapeer County, At a glance
Lapeer County at a glance
Predicted: EPA radon zone
EPA Zone 2: moderate predicted potential
Lapeer 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 Lapeer County, 2008 to 2017, laboratory
Under 2 pCi/L: 37%2 to 4 pCi/L: 30%4 pCi/L and above: 33%
Of 649 pre-mitigation tests reported to CDC, not homes in this area.
| Result band | Tests Measured | Share Measured |
|---|---|---|
| Under 2 pCi/L | 240 | 37.0% |
| 2 to 4 pCi/L | 192 | 29.6% |
| 4 pCi/L and above | 217 | 33.4% |
What these figures count
These are the 649 tests reported to CDC for Lapeer 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).
Lapeer County, Compared
Lapeer County radon figures, compared
Calculated by Radon411In Lapeer County, about 3 in 10 reported tests over the 2008 to 2017 laboratory totals (217 of 649) were at or above EPA's action level. Against the national pool of 35.7%, the gap is 2.3 points lower. Across 83 Michigan counties pooled together, 26.9% of tests reached that level, so Lapeer County runs 6.5 points above its state.
Of 6 neighbours with a figure, 1 reported a larger share at or above 4 pCi/L and 5 a smaller one; the spread is 13.4% (Macomb County) to 35.5% (Tuscola County). By share, Lapeer County is 16th of 82 Michigan counties with 30 or more tests for the same period.
Half the tests came in under 2.7 pCi/L and half over it; the single highest reached 44.6 pCi/L. Below the action level, 240 tests (37.0%) came in under 2 pCi/L, against 46.4% statewide, and 192 tests (29.6%) 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 33.4% share point the same way here. USGS geology rates 100% of the county's land moderate radon potential. CDC also counts 40 tests taken after mitigation in Lapeer County for the same period: tests in homes where a fix was already in.
CDC's ten-year totals for Lapeer County went from 1,069 tests (2005 to 2014) to 649 (2008 to 2017), the share going from 27.7% to 33.4%.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Lapeer County, State data
Michigan's own radon test data
MeasuredWhat Michigan's own agencies publish about radon tests in Lapeer 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 Lapeer County
Michigan EGLE publishes its figures by ZIP code, not by county. These are the 20 ZIP codes that lie wholly or partly in Lapeer County, each with the state's own figures for it. Period: About 10 years to 2026-05-15.
| ZIP code | What the state reports |
|---|---|
| 48003 | 32% greater than 4 pCi/L, median 3.0 pCi/L, 22 tests |
| 48014 | 9% greater than 4 pCi/L, median 1.1 pCi/L, 11 tests |
| 48371 | 43% greater than 4 pCi/L, median 3.2 pCi/L, 203 tests |
| 48412 | 33% greater than 4 pCi/L, median 1.9 pCi/L, 18 tests |
| 48416 | 0% greater than 4 pCi/L, median 0.0 pCi/L, 5 tests |
| 48421 | 43% greater than 4 pCi/L, median 3.0 pCi/L, 23 tests |
| 48423 | 22% greater than 4 pCi/L, median 2.1 pCi/L, 60 tests |
| 48428 | 27% greater than 4 pCi/L, median 2.4 pCi/L, 22 tests |
| 48435 | 2 tests, figures not shown |
| 48438 | 27% greater than 4 pCi/L, median 2.5 pCi/L, 48 tests |
| 48444 | 43% greater than 4 pCi/L, median 2.8 pCi/L, 21 tests |
| 48446 | 24% greater than 4 pCi/L, median 2.2 pCi/L, 113 tests |
| 48453 | 29% greater than 4 pCi/L, median 1.9 pCi/L, 7 tests |
| 48455 | 49% greater than 4 pCi/L, median 3.9 pCi/L, 37 tests |
| 48461 | 40% greater than 4 pCi/L, median 2.4 pCi/L, 25 tests |
| 48462 | 32% greater than 4 pCi/L, median 2.8 pCi/L, 92 tests |
| 48463 | 43% greater than 4 pCi/L, median 3.8 pCi/L, 7 tests |
| 48727 | |
| 48744 | 15% greater than 4 pCi/L, median 2.0 pCi/L, 13 tests |
| 48760 | 4 tests, figures not shown |
- 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.
Lapeer County, Geology
The ground under Lapeer County
PredictedUSGS's geologic map puts all of Lapeer County's mapped land in one class: moderate radon potential. All of it lies in the area the map calls South-Central Michigan Basin, to which USGS gives a radon index of 10, in the moderate band (9 to 11).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| South-Central Michigan Basin | Sandy and silty glacial deposits derived from sandstones, gray shales, limestones, and dolomites. | Moderate | 10 | 100% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Lapeer County beside the ground around it
Across Michigan 9.6% of the land is rated high; none of Lapeer County's is. Of the 6 counties that border it, 1 has more high-potential ground, Oakland County the most at 43.2%.
The map rates the ground, not the air in any home.
Local help
Lapeer County, Local resources
Radon testing and mitigation in Lapeer 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
Lapeer County, Questions
Questions about radon in Lapeer County
Are radon levels high in Lapeer County?
Over the 2008 to 2017 laboratory totals, 33.4% of the radon tests reported to CDC for Lapeer County, Michigan were at or above 4 pCi/L, and the median reported pre-mitigation result was 2.7 pCi/L. Of 82 Michigan counties with 30 or more tests for the same period, 15 reported a higher share; pooled, the state comes to 26.9%.
Which counties border Lapeer County?
Lapeer County borders 6 counties: Tuscola County, Genesee County, Sanilac County, Macomb County, Oakland County and St. Clair County.
Products
Lapeer County, Products
Testing a home in Lapeer County
In Lapeer County, 33.4% of 649 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 Lapeer 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
EcoQube Wi-Fi continuous radon monitor
- C-NRPP 2024/25: Approved
- Plug-in
- Wi-Fi
- App only
Method: Ion chamber
First reading: Within 10 minutes
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Lapeer County, Bordering counties
Counties bordering Lapeer County
Calculated by Radon411- Radon levels in Tuscola CountyEPA zone 3
35.5%at or above 4 pCi/L
Median 2.6 pCi/L · 369 tests · 2.1 points above Lapeer County
- Radon levels in Oakland CountyEPA zone 2
28.8%at or above 4 pCi/L
Median 2.3 pCi/L · 16,224 tests · 4.6 points below Lapeer County
- Radon levels in Genesee CountyEPA zone 2
21.9%at or above 4 pCi/L
Median 2.0 pCi/L · 1,699 tests · 11.5 points below Lapeer County
- Radon levels in Sanilac CountyEPA zone 2
16.6%at or above 4 pCi/L
Median 1.6 pCi/L · 325 tests · 16.8 points below Lapeer County
- Radon levels in St. Clair CountyEPA zone 3
13.7%at or above 4 pCi/L
Median 1.5 pCi/L · 641 tests · 19.7 points below Lapeer County
- Radon levels in Macomb CountyEPA zone 3
13.4%at or above 4 pCi/L
Median 1.6 pCi/L · 5,629 tests · 20.0 points below Lapeer County
Lapeer County, Cities and towns
Cities and towns in Lapeer County
The Census Bureau estimates 89,516 residents in Lapeer County for July 1, 2025, 921 more than in 2020 (+1.0%). That works out to 138 people per square mile of land. No town dominates: Lapeer, the largest, has 9,201 residents, 10.3% of the total. Reported testing is thin here: 649 tests over 2008 to 2017, or 7.3 for every 1,000 residents (2025 estimate), where Michigan as a whole comes to 11.3.
From Lapeer to Clifford, CDC publishes no figure by town: each reads Lapeer County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Lapeer | 9,201 | +1.8% | 10.3% |
| Imlay City | 3,753 | +1.7% | 4.2% |
| Almont | 2,848 | +0.6% | 3.2% |
| Brown Cityextends beyond Lapeer County | 1,280 | −1.5% | Counted whole |
| North Branch | 1,111 | +0.4% | 1.2% |
| Dryden | 1,037 | +0.5% | 1.2% |
| Columbiaville | 712 | −0.8% | 0.8% |
| Metamora | 613 | +3.7% | 0.7% |
| Otter Lakeextends beyond Lapeer County | 357 | −1.7% | Counted whole |
| Clifford | 308 | Level | 0.3% |
10 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 Lapeer County is counted whole, so it has no share.
Lapeer County, Homes
Homes in Lapeer County
Lapeer County is a place of houses on their own lots: 83% of its 36,980 homes are detached single-family houses, against 72% across Michigan. Half of its homes were built before 1978, close to Michigan's 1972: 26% date from before 1960 and 16% from 2000 or later. Owners live in 86% of the occupied homes (Michigan: 73%), so for most households a test and a fix are their own to order.
| Homes | Lapeer County | Michigan |
|---|---|---|
| Housing units | 36,980 | 4,599,683 |
| Detached houses | 83% | 72% |
| In buildings of 5 or more | 5% | 13% |
| Mobile homes | 7% | 5% |
| Built before 1960 | 26% | 36% |
| Built since 2000 | 16% | 15% |
| Middle year built | 1978 | 1972 |
| Owner-occupied | 86% | 73% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.