Marengo, IL Radon Levels
Check local Marengo radon levels and find certified testing and mitigation professionals to keep your home safe
Marengo, IL Radon Facts
Positioned in McHenry County within the Chicago Metro area, Marengo shows moderate radon activity with an average reading of 5.5 pCi/L exceeding the EPA action level. The community's glacial till deposits from Wisconsin glaciation create soil conditions highly favorable for radon production in zip code 60152. Most homes feature full basements typical of northern Illinois, requiring testing and potential mitigation to ensure safe indoor air quality.
Based on 2 user-submitted radon tests for homes in Marengo, IL. The EPA recommends taking action at or above 4.0 pCi/L.
Marengo, IL Radon Mitigation
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Marengo, IL Radon Levels
User-submitted radon test readings from homes in the Marengo area.
| Radon Level | City | Home Age | Foundation |
|---|---|---|---|
| 4 pCi/L | Marengo, IL | 51-99 Years | Full Basement |
| 7 pCi/L | Marengo, IL | 21-50 Years | Full Basement |
Have a radon test result for Marengo? Submit your reading to help other homeowners.
Radon Readings Near Marengo, IL
Compare radon levels in Marengo with the closest nearby cities that have user-submitted test data.
| City | Distance | Avg User Level | Readings |
|---|---|---|---|
| Woodstock | 9.7 mi | 12.50 pCi/L | 2 |
| Huntley | 10.4 mi | 5.75 pCi/L | 4 |
| Harvard | 12.3 mi | 8.00 pCi/L | 2 |
| Belvidere | 12.5 mi | 4.50 pCi/L | 2 |
| Kingston | 12.7 mi | 13.00 pCi/L | 1 |
| Crystal Lake | 14.4 mi | 7.25 pCi/L | 8 |
| Poplar Grove | 14.4 mi | 7.00 pCi/L | 2 |
| Lake In The Hills | 14.8 mi | 6.50 pCi/L | 4 |
McHenry County Radon Profile
EPA mapping assigns McHenry County to Radon Zone 2, indicating moderate predicted indoor screening levels in the 2 to 4 pCi/L range based on regional geology. Homeowner-submitted tests from 11 cities in McHenry County average 7.73 pCi/L across 33 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 McHenry County home regardless of zone or a neighbor's results.