Potosi, WI Radon Levels
Check local Potosi radon levels and find certified testing and mitigation professionals to keep your home safe
Potosi, WI Radon Facts
Residents of Potosi in Grant County should take immediate action, as local testing shows an alarming 17.0 pCi/L average - more than four times the EPA action level. Situated in Wisconsin's Driftless Area where Prairie du Chien limestone lies close to the surface, the geological conditions in zip code 53820 create extreme radon risk. Professional mitigation systems are essential for homes in this Mississippi River bluff community.
Based on 1 user-submitted radon test for homes in Potosi, WI. The EPA recommends taking action at or above 4.0 pCi/L.
Potosi, WI Radon Mitigation
Professional radon mitigation is the most effective way to permanently lower radon levels and protect your household.
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Potosi, WI Radon Levels
User-submitted radon test readings from homes in the Potosi area.
| Radon Level | City | Home Age | Foundation |
|---|---|---|---|
| 17 pCi/L | Potosi, WI | 100+ Years | Full Basement |
Have a radon test result for Potosi? Submit your reading to help other homeowners.
Radon Readings Near Potosi, WI
Compare radon levels in Potosi with the closest nearby cities that have user-submitted test data.
| City | Distance | Avg User Level | Readings |
|---|---|---|---|
| Prairie Du Chien | 32.4 mi | 10.00 pCi/L | 2 |
| Blue River | 38.3 mi | 6.00 pCi/L | 1 |
| Ridgeway | 42.2 mi | 8.00 pCi/L | 1 |
| Spring Green | 47.1 mi | 4.00 pCi/L | 1 |
| Blue Mounds | 49.0 mi | 15.00 pCi/L | 1 |
Grant County Radon Profile
Because of its underlying geology, Grant County is mapped as EPA Radon Zone 1 — the most elevated classification — where predicted indoor screening averages exceed 4 pCi/L. Homeowner-submitted tests from 1 city in Grant County average 17.00 pCi/L across 1 test — above the EPA's 4 pCi/L action level, reinforcing the need for testing across the county. As the second leading cause of lung cancer in the U.S., radon warrants testing in every Grant County home regardless of zone or a neighbor's results.