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

§ 4.1 — Marseilles, IL

Certified radon mitigation in Marseilles, 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. Poffenbarger, Timothy

    Timmit Radon Systems

    current IL IEMA № RNM98106

    mitigation

    630-205-3416August 29, 2026cite ↗

  2. Stuedemann, David

    Stuedemann Radon Resolutions

    current IL IEMA № RNM2010216

    mitigation

    815-343-7091August 29, 2026cite ↗

  3. Stuedemann, Forest

    Stuedemann Radon Resolutions

    current IL IEMA № RNM20263459

    mitigation

    815-343-7091August 29, 2026cite ↗
Fig. 4 — Marseilles, 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.