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

§ 4.1 — Wonder Lake, IL

Certified radon testing in Wonder Lake, IL

2 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. Frasik, John

    Win Home Inspection

    current IL IEMA № RNI2008205

    testing

    815-653-0600August 29, 2026cite ↗

  2. Roberts, Sandra

    Win Home Inspection

    current IL IEMA № RNIT2019223

    testing

    815-653-0600August 29, 2026cite ↗
Fig. 4 — Wonder Lake, 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.