Mattoon, IL Radon Levels
Check local Mattoon radon levels and find certified testing and mitigation professionals to keep your home safe
Mattoon, IL Radon Facts
Mattoon in Coles County shows an average radon level of 9.33 pCi/L, more than double the EPA action threshold, based on recent testing data. Located on deep glacial moraine deposits over limestone bedrock typical of central Illinois, the 61938 zip code area demonstrates the high radon potential common to this prairie region. Homeowners should prioritize immediate testing and consider mitigation systems if elevated levels are confirmed.
Based on 3 user-submitted radon tests for homes in Mattoon, IL. The EPA recommends taking action at or above 4.0 pCi/L.
Mattoon, IL Radon Mitigation
Professional radon mitigation is the most effective way to permanently lower radon levels and protect your household.
Need Radon Mitigation or Testing in Mattoon?
- 100% Free, No-Obligation Quotes
- Matches You with State-Licensed Coles County Pros
Mattoon, IL Radon Levels
User-submitted radon test readings from homes in the Mattoon area.
| Radon Level | City | Home Age | Foundation |
|---|---|---|---|
| 20 pCi/L | Mattoon, IL | 100+ Years | Partial Basement |
| 2 pCi/L | Mattoon, IL | 21-50 Years | Full Basement |
| 6 pCi/L | Mattoon, IL | 51-99 Years | Partial Basement |
Have a radon test result for Mattoon? Submit your reading to help other homeowners.
Radon Readings Near Mattoon, IL
Compare radon levels in Mattoon with the closest nearby cities that have user-submitted test data.
| City | Distance | Avg User Level | Readings |
|---|---|---|---|
| Charleston | 10.7 mi | 8.00 pCi/L | 1 |
| Tuscola | 22.6 mi | 17.00 pCi/L | 1 |
| Shelbyville | 23.0 mi | 17.00 pCi/L | 1 |
| Effingham | 26.7 mi | 4.33 pCi/L | 3 |
| Moweaqua | 35.7 mi | 7.00 pCi/L | 1 |
| Paris | 37.3 mi | 9.67 pCi/L | 3 |
| Monticello | 39.1 mi | 4.50 pCi/L | 2 |
| Urbana | 43.5 mi | 15.00 pCi/L | 1 |
Coles County Radon Profile
Because of its underlying geology, Coles 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 Coles County average 9.00 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 Coles County home regardless of zone or a neighbor's results.