Radon and Mold Testers of Illinois
Highland Park, IL
Listed for: Testing
Verified:Illinois state license
ProfessionalsBusiness profile
Highland Park, 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. RNI91078 | Measurement Professional | Verified November 11, 2026 | Verify RNI91078 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
Local radon figures
Highland Park lies in Lake County, where 27.4% of 13,050 radon tests reported to CDC (2017) were at or above 4 pCi/L, 6.3 points below Illinois pooled (33.7%), 59th of 70 Illinois counties with 30 or more tests.
Shares of tests people chose to run and report, by county (2017); the state's is its counties' counts added up, calculated by Radon411. Only a test measures a home.
Around Lake County, where Highland Park lies, the nearest Illinois counties with a CDC figure for 2017 run from 19.4% to 46.9% of tests at or above 4 pCi/L; the closest, McHenry County, is 23 miles away at 35.1%.
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