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Keweenaw County has fewer than 30 tests on record, so it doesn't meet our indexing gate. It appears as a row in theMichigan county table instead.
0% of 23 radon tests here were at or above 4 pCi/L (EPA's action level). Data through 2026. Source: Michigan indoor radon test results.
Data through 2026 · Michigan indoor radon test results
Keweenaw County has fewer than 30 tests on record, so it doesn't meet our indexing gate. It appears as a row in theMichigan county table instead.