Test results in Marquette County
| Result | Share | EPA guidance |
|---|---|---|
| Below 2 pCi/L | 47% | Below EPA's levels |
| 2 to 4 pCi/L | 25% | Consider fixing |
| 4 pCi/L or more | 29% | EPA recommends fixing |
What the data shows
- Higher share of high results than 67 of 83 Michigan counties.
- 1.2× the Michigan rate of 23%.
- Higher than 6 of 8 neighbouring counties.
- 53% of results at or above 2 pCi/L.
- EPA's 1993 map: Zone 2, an average between 2 and 4 pCi/L. Measured average: 4.8 pCi/L.
- 14.8 tests per 1,000 homes (Michigan: 12.2).
How Marquette County compares
Data table
| Area | Tests ≥ 4 pCi/L | Tests |
|---|---|---|
| Dickinson County | 38% | 499 |
| Iron County | 35% | 144 |
| Marquette County | 29% | 496 |
| Delta County | 20% | 555 |
| Alger County | 18% | 78 |
| Menominee County | 13% | 256 |
| Houghton County | 10% | 459 |
| Baraga County | 4% | 55 |
| Keweenaw County | 0% | 23 |
| Michigan (83 counties) | 23% | 56,518 |
Same source as Marquette County.
What it means for your home
About 1 in 3 results in Marquette County were at or above 4 pCi/L, where the EPA recommends a fix. Only a test shows your own home's level.
Levels in pCi/L from the EPA. The WHO reference level is 100 Bq/m³, about 2.7 pCi/L.
Test your home
Start with a short-term test (2–90 days) and confirm a result of 4 pCi/L or more with a second test. EPA guide
Sponsored: we earn a commission on purchases through these links. We haven't tested Airthings monitors yet.
Prefer a digital monitor? See Airthings radon monitors, or enter code radonbycounty-10OFF at their discount store for 10% off.
Fixing high radon
No local job records yet. National range: $800–$2,500, average $1,200 (EPA, 2003). Cost guide →
Michigan doesn't license radon mitigators; look for NRPP or NRSB certification. Source
Buying or selling here
Michigan's Seller's Disclosure Statement asks whether the seller knows of environmental hazards on the property, including radon gas (MCL 565.957). Source
Checked against the official text on 2026-11-03. Not legal advice.
About this data
Source: Michigan indoor radon test results (Michigan Department of Environment, Great Lakes, and Energy). Period: 2016–2026. Tests: 496. Read the methodology →
These are voluntary and real-estate tests, not a random sample of homes, so they describe tested homes rather than every home.
About this page
Published by Ray Roman, editor of Radon by County. Figures are loaded from the cited source and spot-checked against it. Editorial policy · About us