Monmouth, IL Radon Levels
Check local Monmouth radon levels and find certified testing and mitigation professionals to keep your home safe
Monmouth, IL Radon Facts
Monmouth in Warren County shows an average radon level of 8.0 pCi/L, which significantly exceeds the EPA action threshold of 4.0 pCi/L. This western Illinois community sits on glacial deposits over limestone bedrock, geological conditions known to facilitate radon gas migration into homes. Residents in the 61462 zip code should strongly consider radon testing and mitigation, as the area's soil composition creates favorable conditions for radon accumulation.
Based on 1 user-submitted radon test for homes in Monmouth, IL. The EPA recommends taking action at or above 4.0 pCi/L.
Monmouth, IL Radon Mitigation
Professional radon mitigation is the most effective way to permanently lower radon levels and protect your household.
Need Radon Mitigation or Testing in Monmouth?
- 100% Free, No-Obligation Quotes
- Matches You with State-Licensed Warren County Pros
Monmouth, IL Radon Levels
User-submitted radon test readings from homes in the Monmouth area.
| Radon Level | City | Home Age | Foundation |
|---|---|---|---|
| 8 pCi/L | Monmouth, IL | 100+ Years | Full Basement |
Have a radon test result for Monmouth? Submit your reading to help other homeowners.
Radon Readings Near Monmouth, IL
Compare radon levels in Monmouth with the closest nearby cities that have user-submitted test data.
| City | Distance | Avg User Level | Readings |
|---|---|---|---|
| Stronghurst | 18.3 mi | 13.00 pCi/L | 2 |
| Knoxville | 18.7 mi | 8.00 pCi/L | 1 |
| New Windsor | 22.1 mi | 6.00 pCi/L | 1 |
| Orion | 34.1 mi | 4.00 pCi/L | 1 |
| Dallas City | 34.4 mi | 9.00 pCi/L | 1 |
| Cuba | 37.4 mi | 6.00 pCi/L | 1 |
| Coal Valley | 37.4 mi | 12.00 pCi/L | 1 |
| Rock Island | 40.3 mi | 4.50 pCi/L | 2 |
Warren County Radon Profile
Warren 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 Warren County average 8.00 pCi/L across 1 test — 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 Warren County to test, as levels can differ between neighboring homes.