Listed for: Mitigation
Verified:Illinois state license
ProfessionalsBusiness profile
Saint Louis, Illinois. Testing
1 Illinois state license verified against the Illinois Emergency Management Agency (IEMA) list, last checked November 11, 2026.
Credentials
1 credential is on file for this business, exactly as the issuer's list printed it.
Issued by the Illinois Emergency Management Agency (IEMA), not by NRPP or NRSB. Radon411 last checked the list on November 11, 2026. No expiry date is on the record.
| License | Number | Status on the list | Verified | Check with the issuer |
|---|---|---|---|---|
| Testing license | No. RNI2018227 | Measurement Professional | Verified November 11, 2026 | Verify RNI2018227 with the Illinois Emergency Management Agency (IEMA) (opens in a new tab) |
Illinois's radon program says the state licenses or certifies radon professionals.
IEMA-OHS Radon Program, Illinois Emergency Management Agency and Office of Homeland Security, (800) 325-1245.
What Illinois requires, in its program’s own words, and how to check a credential
Radon figures
CDC publishes radon testing by county, and Saint Louis is not a place its county figures resolve to, so the figures here are Illinois's: pooled across 98 counties, 37.8% of the 187,881 radon tests reported to CDC, 2014, were at or above 4 pCi/L; 74 counties have 30 or more tests for that period.
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