Lanark, IL Radon Mitigation and Testing
Nestled in Carroll County within northwestern Illinois' glaciated landscape, Lanark sits over limestone bedrock and glacial till deposits that create significant radon potential. Current testing data shows an average radon level of 12.0 pCi/L, which substantially exceeds the EPA action level of 4.0 pCi/L. Homeowners in zip code 61046 should prioritize radon mitigation, particularly those with full basements common in this region's traditional housing stock.
Based on 3 user-submitted radon tests for homes in Lanark, IL. The EPA recommends taking action at or above 4.0 pCi/L.
Lanark, IL Radon Mitigation
Professional radon mitigation is the most effective way to permanently lower radon levels and protect your household.
Lanark, IL Radon Testing
Finding qualified radon testing professionals is the first step toward protecting your home.
Lanark, Illinois Radon Levels
User-submitted radon test readings from homes in the Lanark area.
| Radon Level | City | Home Age | Foundation | Submitted |
|---|---|---|---|---|
| 9 pCi/L | Lanark, IL | 21-50 Years | Full Basement | Sep 2025 |
| 20 pCi/L | Lanark, IL | 21-50 Years | Full Basement | Apr 2024 |
| 7 pCi/L | Lanark, IL | 0-20 Years | Full Basement | Nov 2017 |
Have a radon test result for Lanark? Submit your reading to help other homeowners.
Lanark Radon Facts
Key details about the radon risk profile for Lanark and the 61046 zip code area.
Lanark and the 61046 zip code are located in Carroll County, which has an EPA assigned Radon Zone of 1. A radon zone of 1 predicts an average indoor radon screening level greater than 4 pCi/L. The EPA recommends testing every home regardless of zone classification.
Radon FAQ for Lanark, IL
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Most Active Radon Markets in Illinois
Cities with the most user-submitted radon test data in the state.
| City | Avg User Radon Level | Submissions |
|---|---|---|
| Buffalo Grove | 6.10 pCi/L | 10 |
| Crystal Lake | 7.25 pCi/L | 8 |
| Lake Zurich | 6.00 pCi/L | 7 |
| Grayslake | 5.00 pCi/L | 7 |
| New Lenox | 10.17 pCi/L | 6 |
| Park Ridge | 7.00 pCi/L | 6 |
| Arlington Heights | 6.17 pCi/L | 6 |
| Waterloo | 9.20 pCi/L | 5 |
| Palatine | 7.80 pCi/L | 5 |
| Round Lake | 7.80 pCi/L | 5 |
| Northbrook | 6.20 pCi/L | 5 |
| Mchenry | 11.00 pCi/L | 4 |
| Dekalb | 8.75 pCi/L | 4 |
| Columbia | 8.00 pCi/L | 4 |
| Lisle | 7.25 pCi/L | 4 |
| Normal | 7.25 pCi/L | 4 |
| Antioch | 7.00 pCi/L | 4 |
| Elk Grove Village | 7.00 pCi/L | 4 |
| Aurora | 6.75 pCi/L | 4 |
| Hoffman Estates | 6.75 pCi/L | 4 |