Mascoutah, IL Radon Mitigation and Testing
Positioned in St. Clair County on the Illinois side of the St. Louis metro, Mascoutah sits atop Mississippi River floodplain deposits that contribute to moderate radon levels throughout the region. Local testing shows an average indoor radon concentration of 6.5 pCi/L, which exceeds the EPA's 4.0 pCi/L action threshold and warrants mitigation consideration. The combination of alluvial soils over limestone bedrock makes zip code 62258 particularly susceptible to radon entry through basement foundations and floor slabs.
Based on 2 user-submitted radon tests for homes in Mascoutah, IL. The EPA recommends taking action at or above 4.0 pCi/L.
Mascoutah, IL Radon Mitigation
Professional radon mitigation is the most effective way to permanently lower radon levels and protect your household.
Mascoutah, IL Radon Testing
Finding qualified radon testing professionals is the first step toward protecting your home.
Mascoutah, Illinois Radon Levels
User-submitted radon test readings from homes in the Mascoutah area.
| Radon Level | City | Home Age | Foundation | Submitted |
|---|---|---|---|---|
| 5 pCi/L | Mascoutah, IL | 0-20 Years | Full Basement | Apr 2024 |
| 8 pCi/L | MASCOUTAH, IL | 0-20 Years | Full Basement | Apr 2017 |
Have a radon test result for Mascoutah? Submit your reading to help other homeowners.
Mascoutah Radon Facts
Key details about the radon risk profile for Mascoutah and the 62258 zip code area.
Mascoutah and the 62258 zip code are located in St Clair 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 Mascoutah, 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 |