Winona, MN Radon Levels
Check local Winona radon levels and find certified testing and mitigation professionals to keep your home safe
Winona, MN Radon Facts
Bluff-top Winona in Winona County shows an average radon level of 10.0 pCi/L, which substantially exceeds the EPA action threshold of 4.0 pCi/L. Situated along the Mississippi River where limestone bluffs and glacial deposits create ideal conditions for radon accumulation, this historic community requires careful monitoring. Homeowners should prioritize professional mitigation consultation to address these elevated indoor air concentrations.
Based on 1 user-submitted radon test for homes in Winona, MN. The EPA recommends taking action at or above 4.0 pCi/L.
Winona, MN Radon Mitigation
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Winona, MN Radon Levels
User-submitted radon test readings from homes in the Winona area.
| Radon Level | City | Home Age | Foundation |
|---|---|---|---|
| 10 pCi/L | Winona, MN | 21-50 Years | Full Basement |
Have a radon test result for Winona? Submit your reading to help other homeowners.
Radon Readings Near Winona, MN
Compare radon levels in Winona with the closest nearby cities that have user-submitted test data.
| City | Distance | Avg User Level | Readings |
|---|---|---|---|
| Minnesota City | 4.2 mi | 7.00 pCi/L | 1 |
| La Crescent | 23.2 mi | 7.50 pCi/L | 2 |
Winona County Radon Profile
The bedrock and soils beneath Winona County are classified by the EPA as Radon Zone 1, the highest-risk tier, with predicted average indoor screening levels above 4 pCi/L. Homeowner-submitted tests from 2 cities in Winona County average 8.50 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 Winona County.