Certified radon testers & mitigatorsIllinois — testing — verified 29 Aug 2026

§ 4.1 — Highland Park, IL

Certified radon testing in Highland Park, IL

6 current listings from the official file. Verify the credential number before you hire.

Last verified August 29, 2026. Methodology IL IEMA.

Certified radon testingCertified radon mitigation

  1. Hubert, Nathaniel

    Radon And Mold Testers Of Illinois

    current IL IEMA № RNI20242313

    testing

    773-447-0639August 29, 2026cite ↗

  2. Ionescu, Sebastian

    Radon Rach Llc

    current IL IEMA № RNIT20232262

    testing

    312-401-0299August 29, 2026cite ↗

  3. Mann, Leon

    Radon Rach Llc

    current IL IEMA № RNI20231867

    testing

    312-401-9588August 29, 2026cite ↗

  4. Mann, Rachael

    Radon Rach Llc

    current IL IEMA № RNI20242493

    testing

    312-401-0299August 29, 2026cite ↗

  5. Silver, Joe

    Radon And Mold Testers Of Illinois

    current IL IEMA № RNI2012219

    testing

    773-447-0639August 29, 2026cite ↗

  6. Zwang, Stuart

    Home Raters, Inc.

    current IL IEMA № RNI91078

    testing

    847-433-3450August 29, 2026cite ↗
Fig. 4 — Highland Park, IL, approximate. Pin is the city on the official file, not a street address.

Appendix A — Before you hire

  1. Who holds the credential, and can they show the same number that appears on this page?
  2. What test method or mitigation system will they use for this building?
  3. How will they document results or the finished system?

§ 4.3

Nearby places in Illinois

Illinois IEMA licenses radon measurement and mitigation professionals and technicians. The people below appear on the active licensee listing we imported. Read the methodology. Credential status can change.