Hannibal, MO Radon Levels
Check local Hannibal radon levels and find certified testing and mitigation professionals to keep your home safe
Hannibal, MO Radon Facts
Perched along the Mississippi River in Marion County, Hannibal has recorded an average radon level of 6.0 pCi/L based on available testing data, which exceeds the EPA's recommended action threshold of 4.0 pCi/L. The historic river town's mix of 19th and 20th-century homes, many with basements, sits atop limestone bluffs that can facilitate radon entry. Residents should consider professional radon testing and mitigation, particularly given the community's elevated readings and geological setting.
Based on 2 user-submitted radon tests for homes in Hannibal, MO. The EPA recommends taking action at or above 4.0 pCi/L.
Hannibal, MO Radon Mitigation
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Hannibal, MO Radon Levels
User-submitted radon test readings from homes in the Hannibal area.
| Radon Level | City | Home Age | Foundation |
|---|---|---|---|
| 6 pCi/L | Hannibal, MO | 21-50 Years | Full Basement |
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Radon Readings Near Hannibal, MO
Compare radon levels in Hannibal with the closest nearby cities that have user-submitted test data.
Marion County Radon Profile
The soils and bedrock of Marion County place it in EPA Radon Zone 2, a moderate-risk classification with predicted indoor averages of 2 to 4 pCi/L. Homeowner-submitted tests from 2 cities in Marion County average 6.67 pCi/L across 3 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 Marion County to test, as levels can differ between neighboring homes.