Monticello, IL Radon Levels
Check local Monticello radon levels and find certified testing and mitigation professionals to keep your home safe
Monticello, IL Radon Facts
Situated in Piatt County within central Illinois prairie, Monticello shows an average radon level of 4.5 pCi/L that modestly exceeds EPA action guidelines. The area's deep glacial moraine deposits over limestone bedrock contribute to moderate-to-high radon potential across the region. Local homes, predominantly single-family construction with full basements, provide typical pathways for radon entry and accumulation in this agricultural community.
Based on 2 user-submitted radon tests for homes in Monticello, IL. The EPA recommends taking action at or above 4.0 pCi/L.
Monticello, IL Radon Mitigation
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Monticello, IL Radon Levels
User-submitted radon test readings from homes in the Monticello area.
| Radon Level | City | Home Age | Foundation |
|---|---|---|---|
| 5 pCi/L | Monticello, IL | 21-50 Years | No Basement/All Slab |
| 4 pCi/L | Monticello, IL | 21-50 Years | Full Basement |
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Radon Readings Near Monticello, IL
Compare radon levels in Monticello with the closest nearby cities that have user-submitted test data.
Piatt County Radon Profile
Piatt County falls in EPA Radon Zone 1, meaning the local uranium-bearing geology is predicted to drive average indoor radon screening levels above the EPA's 4 pCi/L action threshold. Homeowner-submitted tests from 1 city in Piatt County average 4.50 pCi/L across 2 tests — above the EPA's 4 pCi/L action level, reinforcing the need for testing across the county. Since radon is the second leading cause of lung cancer nationally, the EPA urges every household in Piatt County to test, as levels can differ between neighboring homes.