Mchenry, IL Radon Levels
Check local Mchenry radon levels and find certified testing and mitigation professionals to keep your home safe
Mchenry, IL Radon Facts
Positioned in McHenry County in the northwest suburban Chicago Metro, McHenry shows a concerning average radon level of 11.0 pCi/L, nearly three times the EPA action level. The area's glacial till deposits over limestone bedrock create ideal conditions for radon production and accumulation in homes with full basements. Residents in zip code 60050 should take immediate action, as this significantly elevated reading demands professional radon mitigation.
Based on 4 user-submitted radon tests for homes in Mchenry, IL. The EPA recommends taking action at or above 4.0 pCi/L.
Mchenry, IL Radon Mitigation
Professional radon mitigation is the most effective way to permanently lower radon levels and protect your household.
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Mchenry, IL Radon Levels
User-submitted radon test readings from homes in the Mchenry area.
| Radon Level | City | Home Age | Foundation |
|---|---|---|---|
| 14 pCi/L | Mchenry, IL | 21-50 Years | Full Basement |
| 6 pCi/L | Mchenry, IL | 51-99 Years | Full Basement |
| 12 pCi/L | Mchenry, IL | 21-50 Years | Partial Basement |
| 12 pCi/L | Mchenry, IL | 0-20 Years | Full Basement |
Have a radon test result for Mchenry? Submit your reading to help other homeowners.
Radon Readings Near Mchenry, IL
Compare radon levels in Mchenry with the closest nearby cities that have user-submitted test data.
| City | Distance | Avg User Level | Readings |
|---|---|---|---|
| Fox Lake | 6.1 mi | 5.00 pCi/L | 1 |
| Spring Grove | 7.1 mi | 14.00 pCi/L | 1 |
| Crystal Lake | 7.3 mi | 7.25 pCi/L | 8 |
| Cary | 8.6 mi | 6.00 pCi/L | 3 |
| Wauconda | 8.6 mi | 6.67 pCi/L | 3 |
| Round Lake | 9.0 mi | 7.80 pCi/L | 5 |
| Woodstock | 9.6 mi | 12.50 pCi/L | 2 |
| Fox River Grove | 10.5 mi | 10.00 pCi/L | 1 |
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.