Belvidere, IL Radon Levels
Check local Belvidere radon levels and find certified testing and mitigation professionals to keep your home safe
Belvidere, IL Radon Facts
Positioned in Boone County in the northwest suburban and exurban belt beyond the Chicago metro, Belvidere shows an average radon level of 4.5 pCi/L, which slightly exceeds the EPA action threshold. The area's glacial till deposits from the Wisconsin glaciation create soil conditions highly favorable for radon gas production and migration. Homes in zip code 61008, particularly those with full basements common to the region, should prioritize radon testing and mitigation when needed.
Based on 2 user-submitted radon tests for homes in Belvidere, IL. The EPA recommends taking action at or above 4.0 pCi/L.
Belvidere, IL Radon Mitigation
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Belvidere, IL Radon Levels
User-submitted radon test readings from homes in the Belvidere area.
| Radon Level | City | Home Age | Foundation |
|---|---|---|---|
| 5 pCi/L | Belvidere, IL | 0-20 Years | Partial Basement |
| 4 pCi/L | Belvidere, IL | — | — |
Have a radon test result for Belvidere? Submit your reading to help other homeowners.
Radon Readings Near Belvidere, IL
Compare radon levels in Belvidere with the closest nearby cities that have user-submitted test data.
| City | Distance | Avg User Level | Readings |
|---|---|---|---|
| Poplar Grove | 6.9 mi | 7.00 pCi/L | 2 |
| Kingston | 11.4 mi | 13.00 pCi/L | 1 |
| Marengo | 12.5 mi | 5.50 pCi/L | 2 |
| Roscoe | 13.4 mi | 5.50 pCi/L | 2 |
| Harvard | 16.9 mi | 8.00 pCi/L | 2 |
| South Beloit | 18.0 mi | 4.00 pCi/L | 1 |
| Rockton | 18.1 mi | 6.00 pCi/L | 1 |
| Stillman Valley | 19.9 mi | 5.00 pCi/L | 1 |
Boone County Radon Profile
Because of its underlying geology, Boone 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 2 cities in Boone County average 5.75 pCi/L across 4 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 Boone County home regardless of zone or a neighbor's results.