Short-term kit
Radon Short Term Test Kit short-term charcoal radon test kit, lab fee included
- Lab fee included
Method: Charcoal
In home: 2 to 7 days
Locations and reports
Radon Levels in Allegan County, Michigan
EPA puts Allegan County in Zone 3, its lowest radon zone, and 18.4% of its 766 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
18.4%
8.5 pts below MI
- Allegan
- 18.4%
- Michigan
- 26.9%
766 tests, 2008 to 2017
Median result
1.7pCi/L
Below action level
- Allegan
- 1.7 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2008 to 2017
Tests reported
766
34th of 82 by tests
- Allegan
- 766
- 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
36 of 82
Middle half
- Allegan
- 18.4%
- Lenawee
- 56.7%
By share, of 82 with 30+ tests
Read a result for Allegan County
Starts at Allegan County's median, 1.7 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 1.7 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. Allegan County's median reported result, 2008 to 2017.
The data
Allegan County, At a glance
Allegan County at a glance
Predicted: EPA radon zone
EPA Zone 3: lower predicted potential
USGS geologic potential: Low across 91% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Allegan County, 2008 to 2017, laboratory
Under 2 pCi/L: 54%2 to 4 pCi/L: 28%4 pCi/L and above: 18%
Of 766 pre-mitigation tests reported to CDC, not homes in this area.
| Result band | Tests Measured | Share Measured |
|---|---|---|
| Under 2 pCi/L | 414 | 54.0% |
| 2 to 4 pCi/L | 211 | 27.5% |
| 4 pCi/L and above | 141 | 18.4% |
What these figures count
These are the 766 tests reported to CDC for Allegan 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).
Allegan County, Compared
Allegan County radon figures, compared
Calculated by Radon411Allegan County's 766 reported tests over the 2008 to 2017 laboratory totals had a middle value of 1.7 pCi/L and a maximum of 59.5 pCi/L, and 18.4% reached 4 pCi/L. Michigan as a whole (83 Michigan counties, pooled) comes to 26.9%: 8.5 points higher than here.
Among its state's counties it ranks 36th of 82 Michigan counties with 30 or more tests for the same period. Statewide for the same period, Lenawee County reported the highest share (56.7%) and Muskegon County the lowest (3.2%).
Below the action level, 414 tests (54.0%) came in under 2 pCi/L, against 46.4% statewide, and 211 tests (27.5%) fell between 2 and 4, against 26.7% statewide. CDC's ten-year totals for Allegan County went from 711 tests (2005 to 2014) to 766 (2008 to 2017), the share going from 17.2% to 18.4%.
EPA's 1993 zone map puts Allegan County in Zone 3, a predicted county average under 2 pCi/L. USGS geology rates 91% of the county's land low radon potential.
Next door, the shares run from 16.5% in Kent County to 33.3% in Kalamazoo County, with Van Buren County, Ottawa County and Kent County below Allegan County.
CDC also counts 39 tests taken after mitigation in Allegan County for the same period: tests in homes where a fix was already in.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Allegan County, State data
Michigan's own radon test data
MeasuredWhat Michigan's own agencies publish about radon tests in Allegan 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 Allegan County
Michigan EGLE publishes its figures by ZIP code, not by county. These are the 22 ZIP codes that lie wholly or partly in Allegan County, each with the state's own figures for it. Period: About 10 years to 2026-05-15.
| ZIP code | What the state reports |
|---|---|
| 49010 | 10% greater than 4 pCi/L, median 1.6 pCi/L, 58 tests |
| 49026 | 1 tests, figures not shown |
| 49055 | 17% greater than 4 pCi/L, median 1.6 pCi/L, 12 tests |
| 49070 | 70% greater than 4 pCi/L, median 7.8 pCi/L, 10 tests |
| 49078 | 29% greater than 4 pCi/L, median 2.4 pCi/L, 34 tests |
| 49080 | 26% greater than 4 pCi/L, median 2.4 pCi/L, 100 tests |
| 49090 | 4% greater than 4 pCi/L, median 0.7 pCi/L, 27 tests |
| 49315 | 11% greater than 4 pCi/L, median 1.5 pCi/L, 132 tests |
| 49316 | 15% greater than 4 pCi/L, median 1.9 pCi/L, 155 tests |
| 49323 | 0% greater than 4 pCi/L, median 1.2 pCi/L, 32 tests |
| 49328 | 0% greater than 4 pCi/L, median 1.8 pCi/L, 6 tests |
| 49333 | 31% greater than 4 pCi/L, median 2.4 pCi/L, 189 tests |
| 49344 | 22% greater than 4 pCi/L, median 1.4 pCi/L, 9 tests |
| 49348 | 15% greater than 4 pCi/L, median 1.6 pCi/L, 52 tests |
| 49406 | 4 tests, figures not shown |
| 49408 | 3% greater than 4 pCi/L, median 0.7 pCi/L, 29 tests |
| 49419 | 4% greater than 4 pCi/L, median 1.5 pCi/L, 26 tests |
| 49423 | 6% greater than 4 pCi/L, median 1.2 pCi/L, 124 tests |
| 49426 | 10% greater than 4 pCi/L, median 1.5 pCi/L, 195 tests |
| 49450 | 1 tests, figures not shown |
| 49453 | 29% greater than 4 pCi/L, median 1.4 pCi/L, 14 tests |
| 49464 | 19% greater than 4 pCi/L, median 1.4 pCi/L, 160 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.
Allegan County, Geology
The ground under Allegan County
PredictedMost of the ground under Allegan County is one class on USGS's geologic map: 91.3% of its land is low radon potential, with 8.7% moderate. The map puts 91.3% of Allegan County in the area it calls Lake Michigan Lobe Deposits and 8.7% in South-Central Michigan Basin. USGS gives the first a radon index of 8, in the low band (5 to 8), and the second 10, in the moderate band (9 to 11).
| 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 | 91.3% |
| South-Central Michigan Basin | Sandy and silty glacial deposits derived from sandstones, gray shales, limestones, and dolomites. | Moderate | 10 | 8.7% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Allegan County beside the ground around it
Across Michigan 9.6% of the land is rated high; none of Allegan County's is. Of the 5 counties that border it, 3 have more high-potential ground, Kalamazoo County the most at 83.6%.
The map rates the ground, not the air in any home.
Local help
Allegan County, Local resources
Radon testing and mitigation in Allegan 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
Allegan County, Questions
Questions about radon in Allegan County
Are radon levels high in Allegan County?
Over the 2008 to 2017 laboratory totals, 18.4% of the radon tests reported to CDC for Allegan County, Michigan were at or above 4 pCi/L, and the median reported pre-mitigation result was 1.7 pCi/L. Of 82 Michigan counties with 30 or more tests for the same period, 35 reported a higher share; pooled, the state comes to 26.9%.
Which counties border Allegan County?
Allegan County borders 5 counties: Van Buren County, Kalamazoo County, Barry County, Ottawa County and Kent County.
Products
Allegan County, Products
Testing a home in Allegan County
In Allegan County, 18.4% of 766 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 Allegan County.
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
Monitor
EcoBlu plug-in digital radon monitor with a display
- C-NRPP 2024/25: Not included
- Plug-in
- Alarm
- Screen
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
Allegan County, Bordering counties
Counties bordering Allegan County
Calculated by Radon411- Radon levels in Kalamazoo CountyEPA zone 1
33.3%at or above 4 pCi/L
Median 2.8 pCi/L · 4,100 tests · 14.9 points above Allegan County
- Radon levels in Barry CountyEPA zone 2
30.7%at or above 4 pCi/L
Median 2.6 pCi/L · 1,615 tests · 12.3 points above Allegan County
- Radon levels in Van Buren CountyEPA zone 3
18.0%at or above 4 pCi/L
Median 1.9 pCi/L · 394 tests · 0.4 points below Allegan County
- Radon levels in Ottawa CountyEPA zone 3
16.8%at or above 4 pCi/L
Median 1.6 pCi/L · 2,546 tests · 1.6 points below Allegan County
- Radon levels in Kent CountyEPA zone 2
16.5%at or above 4 pCi/L
Median 1.8 pCi/L · 8,449 tests · 1.9 points below Allegan County
Allegan County, Cities and towns
Cities and towns in Allegan County
The Census Bureau estimates 123,188 residents in Allegan County for July 1, 2025, 2,522 more than in 2020 (+2.1%). That works out to 149 people per square mile of land. Holland, the largest place on its list (35,372 residents in all), extends beyond Allegan County, so no share of the total is worked out for it. Reported testing is thin here: 766 tests over 2008 to 2017, or 6.2 for every 1,000 residents (2025 estimate), where Michigan as a whole comes to 11.3.
From Holland to Martin, CDC publishes no figure by town: each reads Allegan County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Hollandextends beyond Allegan County | 35,372 | +3.0% | Counted whole |
| Allegan | 5,127 | −1.7% | 4.2% |
| Wayland | 4,531 | +2.3% | 3.7% |
| Otsego | 4,045 | −1.7% | 3.3% |
| South Havenextends beyond Allegan County | 4,002 | +1.1% | Counted whole |
| Plainwell | 3,722 | −1.8% | 3.0% |
| Fennville | 1,724 | −0.7% | 1.4% |
| Douglas | 1,411 | +3.4% | 1.1% |
| Saugatuck | 882 | +1.5% | 0.7% |
| Hopkins | 636 | +0.2% | 0.5% |
| Martin | 395 | −2.5% | 0.3% |
11 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 Allegan County is counted whole, so it has no share.
Allegan County, Homes
Homes in Allegan County
Allegan County is a place of houses on their own lots: 79% of its 52,262 homes are detached single-family houses, against 72% across Michigan. Much of Allegan County is recent building: 24% of its homes have gone up since 2000 and the middle year built is 1981, against 1972 for Michigan. 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 | Allegan County | Michigan |
|---|---|---|
| Housing units | 52,262 | 4,599,683 |
| Detached houses | 79% | 72% |
| In buildings of 5 or more | 4% | 13% |
| Mobile homes | 10% | 5% |
| Built before 1960 | 28% | 36% |
| Built since 2000 | 24% | 15% |
| Middle year built | 1981 | 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.