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

§ 4.1 — Westmont, IL

Certified radon testing in Westmont, IL

41 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. Arnold, William

    Radon Detection Specialists, Inc.

    current IL IEMA № RNIT2020219

    testing

    630-325-4443August 29, 2026cite ↗

  2. Brown, Brian

    Radon Detection Specialists, Inc.

    current IL IEMA № RNIT20242405

    testing

    630-325-4443August 29, 2026cite ↗

  3. Burchert, David

    Radon Detection Specialists, Inc.

    current IL IEMA № RNIT20242389

    testing

    630-325-4443August 29, 2026cite ↗

  4. Carbonara, Diane

    Radon Detection Specialists, Inc.

    current IL IEMA № RNIT2021219

    testing

    630-325-4443August 29, 2026cite ↗

  5. Carbonara, Terrence

    Radon Detection Specialists, Inc.

    current IL IEMA № RNIT2020214

    testing

    630-325-4443August 29, 2026cite ↗

  6. Coghlan, Jennifer

    Radon Detection Specialists, Inc.

    current IL IEMA № RNIT2005205

    testing

    630-325-4443August 29, 2026cite ↗

  7. Crout, Charles

    Radon Detection Specialists, Inc.

    current IL IEMA № RNIT2017203

    testing

    630-325-4443August 29, 2026cite ↗

  8. Dunsing, James

    Radon Detection Specialists, Inc.

    current IL IEMA № RNIT2004227

    testing

    630-325-4443August 29, 2026cite ↗

  9. Eccleston, Michael

    Radon Detection Specialists, Inc.

    current IL IEMA № RNIT2017214

    testing

    630-325-4443August 29, 2026cite ↗

  10. Flary, Robert

    Radon Detection Specialists, Inc.

    current IL IEMA № RNIT20253227

    testing

    630-325-4443August 29, 2026cite ↗

  11. Franzen, William

    Radon Detection Specialists, Inc.

    current IL IEMA № RNIT2017205

    testing

    630-325-4443August 29, 2026cite ↗

  12. Griest, Timothy

    Radon Detection Specialists, Inc.

    current IL IEMA № RNIT2019205

    testing

    630-325-4443August 29, 2026cite ↗

  13. Harrison, Joseph

    Radon Detection Specialists, Inc.

    current IL IEMA № RNIT20242706

    testing

    630-325-4443August 29, 2026cite ↗

  14. Jackson, Gerald

    Radon Detection Specialists, Inc.

    current IL IEMA № RNIT2022215

    testing

    630-325-4443August 29, 2026cite ↗

  15. Jacobson, Joshua

    Radon Detection Specialists, Inc.

    current IL IEMA № RNIT20232287

    testing

    630-325-4443August 29, 2026cite ↗

  16. Johnson, Adrian

    Radon Detection Specialists, Inc.

    current IL IEMA № RNIT20232280

    testing

    630-325-4443August 29, 2026cite ↗

  17. Karl, Martin

    Radon Detection Specialists, Inc.

    current IL IEMA № RNIT2012213

    testing

    630-325-4443August 29, 2026cite ↗

  18. Kathan, Brian

    Radon Detection Specialists, Inc.

    current IL IEMA № RNIT2016204

    testing

    630-325-4443August 29, 2026cite ↗

  19. Kolke, James

    Radon Detection Specialists, Inc.

    current IL IEMA № RNIT2008215

    testing

    630-325-4443August 29, 2026cite ↗

  20. Kolke, Stacey

    Radon Detection Specialists, Inc.

    current IL IEMA № RNIT2012210

    testing

    630-325-4443August 29, 2026cite ↗

  21. Lewandowski, Thomas

    Radon Detection Specialists, Inc.

    current IL IEMA № RNI2022246

    testing

    630-325-4443August 29, 2026cite ↗

  22. Macholl, Steven

    Radon Detection Specialists, Inc.

    current IL IEMA № RNIT20232194

    testing

    630-325-4443August 29, 2026cite ↗

  23. Mart, Andrea

    Radon Detection Specialists, Inc.

    current IL IEMA № RNI2022247

    testing

    630-325-4443August 29, 2026cite ↗

  24. Medina, Carlos

    Radon Detection Specialists, Inc.

    current IL IEMA № RNIT20232288

    testing

    630-325-4443August 29, 2026cite ↗

  25. Miehlke, Ed

    Radon Detection Specialists, Inc.

    current IL IEMA № RNIT2002208

    testing

    630-325-4443August 29, 2026cite ↗

  26. Mikhael, Nadia

    Radon Detection Specialists, Inc.

    current IL IEMA № RNIT20263619

    testing

    630-325-4443August 29, 2026cite ↗

  27. Patel, Kamlesh

    Radon Detection Specialists, Inc.

    current IL IEMA № RNIT2016217

    testing

    630-325-4443August 29, 2026cite ↗

  28. Pender, Brett

    Radon Detection Specialists, Inc.

    current IL IEMA № RNIT20232302

    testing

    630-325-4443August 29, 2026cite ↗

  29. Reilly, Stephen

    Radon Detection Specialists, Inc.

    current IL IEMA № RNIT2007229

    testing

    630-325-4443August 29, 2026cite ↗

  30. Reyes, Michelle

    Radon Detection Specialists, Inc.

    current IL IEMA № RNIT2013231

    testing

    630-325-4443August 29, 2026cite ↗

  31. Ruszkowski, Michael

    Radon Detection Specialists, Inc.

    current IL IEMA № RNIT2013211

    testing

    630-325-4443August 29, 2026cite ↗

  32. Schmidt, Kirsten

    Radon Detection Specialists, Inc.

    current IL IEMA № RNI2006204

    testing

    630-325-4443August 29, 2026cite ↗

  33. Sidlo, Scott

    Radon Detection Specialists, Inc.

    current IL IEMA № RNIT2020205

    testing

    630-325-4443August 29, 2026cite ↗

  34. Skalicky, Sharon

    Radon Detection Specialists, Inc.

    current IL IEMA № RNI2022248

    testing

    630-325-4443August 29, 2026cite ↗

  35. Smith, James

    Radon Detection Specialists, Inc.

    current IL IEMA № RNIT2022211

    testing

    630-325-4443August 29, 2026cite ↗

  36. Smith, Randy

    Radon Detection Specialists, Inc.

    current IL IEMA № RNIT2017204

    testing

    630-325-4443August 29, 2026cite ↗

  37. Spielman, Thomas

    Radon Detection Specialists, Inc.

    current IL IEMA № RNIT2018231

    testing

    630-325-4443August 29, 2026cite ↗

  38. Stephans, Michael

    Radon Detection Specialists, Inc.

    current IL IEMA № RNIT2021210

    testing

    630-325-4443August 29, 2026cite ↗

  39. Szymendera, David

    Radon Dave Llc

    current IL IEMA № RNI20242382

    testing

    312-371-1519August 29, 2026cite ↗

  40. Trujillo, Carlos

    Radon Detection Specialists, Inc.

    current IL IEMA № RNIT2013205

    testing

    630-325-4443August 29, 2026cite ↗

  41. Weber, Karen

    Radon Detection Specialists, Inc.

    current IL IEMA № RNI2014226

    testing

    630-325-4443August 29, 2026cite ↗
Fig. 4 — Westmont, 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.