Champaign, IL Radon Mitigation and Testing
University city Champaign in Champaign County records an average radon level of 6.0 pCi/L, exceeding the EPA action level and reflecting the challenging radon conditions common throughout central Illinois. The community's diverse housing stock, from historic neighborhoods near the University of Illinois to modern suburban developments, predominantly features full basements where radon can accumulate. Residents across zip codes 61820-61822 should prioritize radon testing and mitigation given these elevated regional levels and the area's glacial till geology.
Based on 3 user-submitted radon tests for homes in Champaign, IL. The EPA recommends taking action at or above 4.0 pCi/L.
Champaign, IL Radon Mitigation
Professional radon mitigation is the most effective way to permanently lower radon levels and protect your household.
Champaign, IL Radon Testing
Finding qualified radon testing professionals is the first step toward protecting your home.
Champaign, Illinois Radon Levels
User-submitted radon test readings from homes in the Champaign area.
| Radon Level | City | Home Age | Foundation | Submitted |
|---|---|---|---|---|
| 7 pCi/L | Champaign, IL | 100+ Years | Partial Basement | Mar 2026 |
| 6 pCi/L | Champaign, IL | 51-99 Years | No Basement/All Crawl Space | Mar 2020 |
Have a radon test result for Champaign? Submit your reading to help other homeowners.
Champaign Radon Facts
Key details about the radon risk profile for Champaign and the 61820 zip code area.
Champaign and the 61820 zip code are located in Champaign County, which has an EPA assigned Radon Zone of 1. A radon zone of 1 predicts an average indoor radon screening level greater than 4 pCi/L. The EPA recommends testing every home regardless of zone classification.
Radon FAQ for Champaign, IL
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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 |