Wilmette, IL Radon Levels
Check local Wilmette radon levels and find certified testing and mitigation professionals to keep your home safe
Wilmette, IL Radon Facts
This affluent North Shore suburb in Cook County shows concerning radon levels, with an average reading of 6.0 pCi/L that significantly exceeds the EPA action threshold. Located along the northern suburban corridor of the Chicago metro, Wilmette's position on glacial till deposits over limestone bedrock creates conditions highly favorable for radon gas production and migration. The community's predominantly single-family homes with full poured-concrete basements in zip code 60091 provide the enclosed below-grade spaces where radon accumulates most readily.
Based on 2 user-submitted radon tests for homes in Wilmette, IL. The EPA recommends taking action at or above 4.0 pCi/L.
Wilmette, IL Radon Mitigation
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Wilmette, IL Radon Levels
User-submitted radon test readings from homes in the Wilmette area.
| Radon Level | City | Home Age | Foundation |
|---|---|---|---|
| 4 pCi/L | Wilmette, IL | 51-99 Years | Full Basement |
| 6 pCi/L | Wilmette, IL | 51-99 Years | Partial Basement |
Have a radon test result for Wilmette? Submit your reading to help other homeowners.
Radon Readings Near Wilmette, IL
Compare radon levels in Wilmette with the closest nearby cities that have user-submitted test data.
| City | Distance | Avg User Level | Readings |
|---|---|---|---|
| Evanston | 2.6 mi | 9.00 pCi/L | 1 |
| Glenview | 4.1 mi | 4.33 pCi/L | 3 |
| Northbrook | 7.1 mi | 6.20 pCi/L | 5 |
| Park Ridge | 7.5 mi | 6.57 pCi/L | 7 |
| Highland Park | 8.2 mi | 10.00 pCi/L | 3 |
| Deerfield | 9.5 mi | 4.00 pCi/L | 1 |
| Mount Prospect | 11.0 mi | 5.33 pCi/L | 3 |
| Prospect Heights | 11.2 mi | 10.00 pCi/L | 1 |
Cook County Radon Profile
Cook County is mapped as EPA Radon Zone 2, where the local geology is predicted to produce moderate indoor screening levels between 2 and 4 pCi/L. Homeowner-submitted tests from 40 cities in Cook County average 6.44 pCi/L across 82 tests — above the EPA's 4 pCi/L action level, reinforcing the need for testing across the county. Radon is the second leading cause of lung cancer in the United States, and a short-term test is the only way to confirm a specific home's level in Cook County.