Cary, IL Radon Levels
Check local Cary radon levels and find certified testing and mitigation professionals to keep your home safe
Cary, IL Radon Facts
This McHenry County community northwest of Chicago shows an average radon level of 6.0 pCi/L, significantly exceeding the EPA action threshold. The area's glacial till deposits over limestone bedrock create ideal conditions for radon production and migration into homes. Located in zip code 60013, Cary's predominantly single-family homes with full basements typical of Chicago Metro construction require active radon mitigation systems to reduce indoor levels.
Based on 3 user-submitted radon tests for homes in Cary, IL. The EPA recommends taking action at or above 4.0 pCi/L.
Cary, IL Radon Mitigation
Professional radon mitigation is the most effective way to permanently lower radon levels and protect your household.
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Cary, IL Radon Levels
User-submitted radon test readings from homes in the Cary area.
| Radon Level | City | Home Age | Foundation |
|---|---|---|---|
| 8 pCi/L | Cary, IL | 21-50 Years | Full Basement |
| 5 pCi/L | Cary, IL | 21-50 Years | Full Basement |
Have a radon test result for Cary? Submit your reading to help other homeowners.
Radon Readings Near Cary, IL
Compare radon levels in Cary with the closest nearby cities that have user-submitted test data.
| City | Distance | Avg User Level | Readings |
|---|---|---|---|
| Fox River Grove | 2.1 mi | 10.00 pCi/L | 1 |
| Crystal Lake | 4.8 mi | 7.25 pCi/L | 8 |
| Algonquin | 5.0 mi | 5.00 pCi/L | 2 |
| Lake In The Hills | 5.2 mi | 6.50 pCi/L | 4 |
| Wauconda | 6.4 mi | 6.67 pCi/L | 3 |
| Barrington | 6.7 mi | 6.00 pCi/L | 3 |
| Lake Zurich | 8.5 mi | 6.00 pCi/L | 7 |
| Mchenry | 8.6 mi | 11.00 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.