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

§ 4.1 — Joliet, IL

Certified radon testing in Joliet, IL

3 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. Caire, Nicholas

    Caire Inspection Group

    current IL IEMA № RNI20253094

    testing

    630-272-8872August 29, 2026cite ↗

  2. Caire, Taylor

    Caire Inspection Group

    current IL IEMA № RNI20252958

    testing

    63--August 29, 2026cite ↗

  3. Duffield, Dennis

    Duffield Consulting Engineers, Ltd.

    current IL IEMA № RNI2017203

    testing

    815-693-9871August 29, 2026cite ↗
Fig. 4 — Joliet, 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.