Chicago, IL Radon Mitigation and Testing
Illinois's largest city in Cook County shows an average radon level of 11.0 pCi/L based on recent testing across multiple ZIP codes, significantly exceeding the EPA's 4.0 pCi/L action threshold. Located along the northern suburban corridor where glacial till deposits from the Wisconsin glaciation create soil conditions highly favorable for radon gas production and migration, Chicago's predominantly single-family homes with full poured-concrete or block basements provide enclosed below-grade spaces where radon accumulates most readily. With readings ranging from 2.0 to 20.0 pCi/L, residents should prioritize professional testing and strongly consider mitigation systems.
Based on 3 user-submitted radon tests for homes in Chicago, IL. The EPA recommends taking action at or above 4.0 pCi/L.
Chicago, IL Radon Mitigation
Professional radon mitigation is the most effective way to permanently lower radon levels and protect your household.
Chicago, IL Radon Testing
Finding qualified radon testing professionals is the first step toward protecting your home.
Chicago, Illinois Radon Levels
User-submitted radon test readings from homes in the Chicago area.
| Radon Level | City | Home Age | Foundation | Submitted |
|---|---|---|---|---|
| 20 pCi/L | Chicago, IL | 0-20 Years | Full Basement | Oct 2024 |
| 2 pCi/L | Chicago, IL | 100+ Years | Full Basement | Jan 2024 |
| 11 pCi/L | Chicago, IL | 0-20 Years | — | Jan 2024 |
Have a radon test result for Chicago? Submit your reading to help other homeowners.
Chicago Radon Facts
Key details about the radon risk profile for Chicago and the 60601 zip code area.
Chicago and the 60601 zip code are located in Cook County, which has an EPA assigned Radon Zone of 2. A radon zone of 2 predicts an average indoor radon screening level between 2 and 4 pCi/L. The EPA recommends testing every home regardless of zone classification.
Radon FAQ for Chicago, IL
What is the average radon level in Chicago, IL?
What EPA Radon Zone is Chicago in?
How much does radon mitigation cost in Chicago?
Should I test for radon if I'm buying a home in Chicago?
Most Active Radon Markets in Illinois
Cities with the most user-submitted radon test data in the state.
| City | Avg User Radon Level | Submissions |
|---|---|---|
| Buffalo Grove | 6.10 pCi/L | 10 |
| Crystal Lake | 7.25 pCi/L | 8 |
| Lake Zurich | 6.00 pCi/L | 7 |
| Grayslake | 5.00 pCi/L | 7 |
| New Lenox | 10.17 pCi/L | 6 |
| Park Ridge | 7.00 pCi/L | 6 |
| Arlington Heights | 6.17 pCi/L | 6 |
| Waterloo | 9.20 pCi/L | 5 |
| Palatine | 7.80 pCi/L | 5 |
| Round Lake | 7.80 pCi/L | 5 |
| Northbrook | 6.20 pCi/L | 5 |
| Mchenry | 11.00 pCi/L | 4 |
| Dekalb | 8.75 pCi/L | 4 |
| Columbia | 8.00 pCi/L | 4 |
| Lisle | 7.25 pCi/L | 4 |
| Normal | 7.25 pCi/L | 4 |
| Antioch | 7.00 pCi/L | 4 |
| Elk Grove Village | 7.00 pCi/L | 4 |
| Aurora | 6.75 pCi/L | 4 |
| Hoffman Estates | 6.75 pCi/L | 4 |