Grand Marais, MN Radon Levels
Check local Grand Marais radon levels and find certified testing and mitigation professionals to keep your home safe
Grand Marais, MN Radon Facts
Perched along Lake Superior's North Shore in Cook County, Grand Marais has recorded a radon level of 8.0 pCi/L in recent testing. This reading doubles the EPA action level, reflecting the area's unique geological setting where Precambrian bedrock and glacial deposits can concentrate radon gas. Homeowners in this remote Minnesota community should test their properties, particularly those with basements or lower-level living spaces.
Based on 1 user-submitted radon test for homes in Grand Marais, MN. The EPA recommends taking action at or above 4.0 pCi/L.
Grand Marais, MN Radon Mitigation
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Grand Marais, MN Radon Levels
User-submitted radon test readings from homes in the Grand Marais area.
| Radon Level | City | Home Age | Foundation |
|---|---|---|---|
| 8 pCi/L | Grand Marais, MN | 51-99 Years | No Basement/All Crawl Space |
Have a radon test result for Grand Marais? Submit your reading to help other homeowners.
Radon Readings Near Grand Marais, MN
Compare radon levels in Grand Marais with the closest nearby cities that have user-submitted test data.
| City | Distance | Avg User Level | Readings |
|---|---|---|---|
| Grand Portage | 32.3 mi | 16.00 pCi/L | 1 |
Cook County Radon Profile
Cook County is mapped as EPA Radon Zone 2, where the local geology is predicted to produce moderate indoor screening levels between 2 and 4 pCi/L. Homeowner-submitted tests from 2 cities in Cook County average 12.00 pCi/L across 2 tests — above the EPA's 4 pCi/L action level, reinforcing the need for testing across the county. Radon is the second leading cause of lung cancer in the United States, and a short-term test is the only way to confirm a specific home's level in Cook County.