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

§ 4.1 — Columbia, MD

Certified radon testing in Columbia, MD

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

Last verified August 29, 2026. Methodology NRPP. NRSB.

Certified radon testingCertified radon mitigation

  1. Azmi Alkurd

    Nextday Inspect

    current NRSB № RMS-21SS025

    testing

    August 29, 2026cite ↗

  2. John Hawkins

    Nextday Inspect

    current NRSB № RMT-25MT018

    testing

    August 29, 2026cite ↗

  3. Rhonda Leib

    Nextday Inspect

    current NRSB № RMT-23MT010

    testing

    August 29, 2026cite ↗
Fig. 4 — Columbia, MD, 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 Maryland

Maryland pages here use current NRPP or NRSB certifications. City pages use the city printed on that record, not a ZIP-radius search. A national certification is not a Maryland license. Some states require a separate state credential to work legally. Read the methodology. Credential status can change.