Lanark, IL Radon Levels
Check local Lanark radon levels and find certified testing and mitigation professionals to keep your home safe
Lanark, IL Radon Facts
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
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Lanark, IL Radon Levels
User-submitted radon test readings from homes in the Lanark area.
| Radon Level | City | Home Age | Foundation |
|---|---|---|---|
| 9 pCi/L | Lanark, IL | 21-50 Years | Full Basement |
| 20 pCi/L | Lanark, IL | 21-50 Years | Full Basement |
| 7 pCi/L | Lanark, IL | 0-20 Years | Full Basement |
Have a radon test result for Lanark? Submit your reading to help other homeowners.
Radon Readings Near Lanark, IL
Compare radon levels in Lanark with the closest nearby cities that have user-submitted test data.
| City | Distance | Avg User Level | Readings |
|---|---|---|---|
| Freeport | 17.2 mi | 3.67 pCi/L | 3 |
| Mount Morris | 20.3 mi | 4.00 pCi/L | 1 |
| Rock Falls | 23.6 mi | 6.00 pCi/L | 2 |
| Fulton | 23.6 mi | 4.00 pCi/L | 1 |
| Dixon | 24.2 mi | 14.00 pCi/L | 2 |
| Hanover | 26.4 mi | 5.00 pCi/L | 1 |
| Orangeville | 27.8 mi | 14.00 pCi/L | 1 |
| Pecatonica | 28.5 mi | 11.00 pCi/L | 1 |
Carroll County Radon Profile
Because of its underlying geology, Carroll 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 1 city in Carroll County average 12.00 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 Carroll County home regardless of zone or a neighbor's results.