Freeport, IL Radon Levels
Check local Freeport radon levels and find certified testing and mitigation professionals to keep your home safe
Freeport, IL Radon Facts
Based on 3 home tests in Stephenson County, Freeport shows an average radon level of 3.67 pCi/L, which falls within the EPA's recommended range but still warrants attention. The community's glacial till deposits over limestone bedrock create favorable conditions for radon gas migration, with individual readings ranging from 3.0 to 5.0 pCi/L in zip code 61032. Regular testing remains important for all Freeport homeowners, particularly those with basements or crawl spaces.
Based on 3 user-submitted radon tests for homes in Freeport, IL. The EPA recommends taking action at or above 4.0 pCi/L.
Freeport, IL Radon Mitigation
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Freeport, IL Radon Levels
User-submitted radon test readings from homes in the Freeport area.
| Radon Level | City | Home Age | Foundation |
|---|---|---|---|
| 3 pCi/L | Freeport, IL | 51-99 Years | Full Basement |
| 5 pCi/L | Freeport, IL | 51-99 Years | No Basement/All Crawl Space |
Have a radon test result for Freeport? Submit your reading to help other homeowners.
Radon Readings Near Freeport, IL
Compare radon levels in Freeport with the closest nearby cities that have user-submitted test data.
| City | Distance | Avg User Level | Readings |
|---|---|---|---|
| Orangeville | 12.0 mi | 14.00 pCi/L | 1 |
| Pecatonica | 14.7 mi | 11.00 pCi/L | 1 |
| Davis | 15.3 mi | 8.00 pCi/L | 1 |
| Lanark | 17.2 mi | 12.00 pCi/L | 3 |
| Mount Morris | 20.1 mi | 4.00 pCi/L | 1 |
| Byron | 22.2 mi | 11.50 pCi/L | 2 |
| Stillman Valley | 26.0 mi | 5.00 pCi/L | 1 |
| Rockton | 29.9 mi | 6.00 pCi/L | 1 |
Stephenson County Radon Profile
Because of its underlying geology, Stephenson 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 3 cities in Stephenson County average 6.60 pCi/L across 5 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 Stephenson County home regardless of zone or a neighbor's results.