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

§ 4.1 — Johnston, IA

Certified radon testing in Johnston, IA

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

Last verified August 29, 2026. Methodology IA HHS.

Certified radon testingCertified radon mitigation

  1. Delzell, Sky M.

    Eocene Environmental Group, Inc.

    current IA HHS № RNTST10211

    testing

    (515) 473-6256August 29, 2026cite ↗

  2. Henry, Jacob F.

    Eocene Environmental Group, Inc.

    current IA HHS № RNTST10238

    testing

    (515) 473-6256August 29, 2026cite ↗

  3. Johnson, Leon

    Eocene Environmental Group, Inc.

    current IA HHS № RNTST10189

    testing

    (515) 473-6256August 29, 2026cite ↗

  4. McElroy, Kirstyn B.

    Eocene Environmental Group, Inc.

    current IA HHS № RNTST10243

    testing

    (515) 473-6256August 29, 2026cite ↗

  5. Meade, Hugh

    National Property Inspection

    current IA HHS № RNTST09114

    testing

    (515) 991-9167August 29, 2026cite ↗

  6. Siverthorn, Tyler R.

    Eocene Environmental Group, Inc.

    current IA HHS № RNTST10187

    testing

    (515) 473-6256August 29, 2026cite ↗

  7. Thomas, Emma C.

    Eocene Environmental Group, Inc.

    current IA HHS № RNTST10237

    testing

    (515) 473-6256August 29, 2026cite ↗
Fig. 4 — Johnston, IA, 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 Iowa

Iowa HHS certifies radon measurement specialists and credentials mitigation specialists. The people below appear on the official certified/credentialed specialist PDFs we imported. Read the methodology. Credential status can change.