Monroe, WI Radon Levels
Check local Monroe radon levels and find certified testing and mitigation professionals to keep your home safe
Monroe, WI Radon Facts
Located in Green County within the Madison Metro area (53566), Monroe has recorded an exceptionally high average radon level of 13.0 pCi/L, more than three times the EPA action threshold. The area's dolomite bedrock and glacial till deposits create ideal conditions for radon accumulation, particularly in the full basements common to Wisconsin homes built throughout the 20th century.
Based on 2 user-submitted radon tests for homes in Monroe, WI. The EPA recommends taking action at or above 4.0 pCi/L.
Monroe, WI Radon Mitigation
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Monroe, WI Radon Levels
User-submitted radon test readings from homes in the Monroe area.
| Radon Level | City | Home Age | Foundation |
|---|---|---|---|
| 8 pCi/L | Monroe, WI | 21-50 Years | Full Basement |
| 18 pCi/L | Monroe, WI | 51-99 Years | Partial Basement |
Have a radon test result for Monroe? Submit your reading to help other homeowners.
Radon Readings Near Monroe, WI
Compare radon levels in Monroe with the closest nearby cities that have user-submitted test data.
| City | Distance | Avg User Level | Readings |
|---|---|---|---|
| New Glarus | 14.9 mi | 7.00 pCi/L | 1 |
| Oregon | 26.2 mi | 12.00 pCi/L | 1 |
| Verona | 28.1 mi | 18.00 pCi/L | 1 |
| Mount Horeb | 28.3 mi | 9.00 pCi/L | 1 |
| Blue Mounds | 29.7 mi | 15.00 pCi/L | 1 |
| Ridgeway | 33.3 mi | 8.00 pCi/L | 1 |
| Mc Farland | 33.4 mi | 9.00 pCi/L | 1 |
| Middleton | 35.6 mi | 4.00 pCi/L | 1 |
Green County Radon Profile
Because of its underlying geology, Green 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 2 cities in Green County average 11.00 pCi/L across 3 tests — 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 Green County home regardless of zone or a neighbor's results.