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§ 4.1 — Arizona

Radon testing in Arizona

This page lists 31 people and firms with a current radon testing credential whose official record names Arizona. Each row shows the credential number, the issuing body, and its own verification date. The latest record check on this page was October 13, 2026; other records may have been checked earlier. Source: NRPP. A national certification is not a state license. Verify the number before you hire.

Latest credential check October 13, 2026. Methodology Individual record dates may be earlier. NRPP.

Radon testingRadon mitigation

Testing listings are people credentialed to measure radon. Mitigation listings are people credentialed to install a reduction system. Some people appear on both lists when the official file says they hold both. The list is ordered by the city or county on each record. That place is where the record is filed, not a promise about where the person works.

31 listings. Type to narrow the list.

  1. Christian R. Matecki

    Rnomics, Llc

    current NRPP № 107105

    testing, Casa Grande

    (602) 663-2270October 13, 2026cite ↗

  2. Kaber C Robinson

    Arizona Radon

    current NRPP № 113204

    testing, Cave Creek

    (480) 901-1970October 13, 2026cite ↗

  3. Jacob Crawford

    Radiation Safety Engineering

    current NRPP № 114167

    testing, Chandler

    (480) 897-9459October 13, 2026cite ↗

  4. Kaycie Poyner

    Partner Engineering And Science, Inc.

    current NRPP № 116052

    testing, Chandler

    (602) 809-0084October 13, 2026cite ↗

  5. Tracey L Carpenter

    Js Held

    current NRPP № 114625

    testing, Chandler

    (602) 695-8104October 13, 2026cite ↗

  6. Andrew Ramsey

    Architectural & Environmental Associates, Inc.

    current NRPP № 107192

    testing, Flagstaff

    (928) 606-4955October 13, 2026cite ↗

  7. Jonathan Offner

    Flag Home Inspection Llc

    current NRPP № 113737

    testing, Flagstaff

    (928) 607-6425October 13, 2026cite ↗

  8. Ryan J Yazzie

    Certerra

    current NRPP № 116074

    testing, Flagstaff

    (928) 733-9523October 13, 2026cite ↗

  9. William Branch

    121 Pro Inspections

    current NRPP № 110712

    testing, Flagstaff

    (928) 856-0327October 3, 2026cite ↗

  10. Mindy L. Moore

    Rnomics, Llc

    current NRPP № 108786

    testing, Glendale

    (480) 622-5907October 3, 2026cite ↗

  11. Winifred Cheuvront

    Protect Environmental, Llc

    current NRPP № 109158

    testing, Glendale

    (520) 909-4292October 3, 2026cite ↗

  12. Ethan Castelli

    Partner Engineering And Science, Inc

    current NRPP № 114083

    testing, Maricopa

    (480) 594-8853October 13, 2026cite ↗

  13. Devin E Clary

    Partner Engineering And Science, Inc.

    current NRPP № 114886

    testing, Mesa

    (970) 889-5528October 13, 2026cite ↗

  14. Destiny Johnson

    City Of Phoenix, Street Transportation Department, Environmental Services Sectio

    current NRPP № 113719

    testing, Phoenix

    (602) 495-3745October 13, 2026cite ↗

  15. Diamond M Woodfill

    Dominion Environmental Consultants, Inc.

    current NRPP № 115584

    testing, Phoenix

    (602) 989-0985October 13, 2026cite ↗

  16. Kailee M McCoy

    Partner Engineering And Science Inc.

    current NRPP № 114817

    testing, Phoenix

    (480) 273-5715October 13, 2026cite ↗

  17. Kederick Nilsen

    Firebird Testing, Llc

    current NRPP № 116288

    testing, Phoenix

    (602) 838-5876October 12, 2026cite ↗

  18. Nicholas B Marcos

    Nicholas B Marcos

    current NRPP № 114258

    testing, Phoenix

    October 13, 2026cite ↗

  19. Randall Whitlock

    Vann Engineering, Inc.

    current NRPP № 109257

    testing, Phoenix

    (602) 943-6997October 3, 2026cite ↗

  20. Trevor A Brown

    Partner Engineering And Science, Inc.

    current NRPP № 112272

    testing, Phoenix

    (602) 909-0854October 3, 2026cite ↗

  21. Dean Heim

    Bpg Inspections

    current NRPP № 109233

    testing, Prescott Valley

    (571) 639-7500October 3, 2026cite ↗

  22. Tina Ross

    Arizona Residential Radon Testing, Llc

    current NRPP № 111413

    testing, Queen Creek

    (520) 729-0233October 3, 2026cite ↗

  23. Martha Carolina Cortes Ortiz

    Cbre

    current NRPP № 114802

    testing, Scottsdale

    (480) 886-4783October 13, 2026cite ↗

  24. Dylan Alsgaard

    Dominion Environmental Consultants, Inc

    current NRPP № 115185

    testing, Tempe

    (602) 989-6100October 13, 2026cite ↗

  25. Breana M Quesada

    Terracon Consultants Inc

    current NRPP № 115392

    testing, Tucson

    (520) 307-8092October 13, 2026cite ↗

  26. Derek D Koller

    Terracon Consultants, Inc.

    current NRPP № 115395

    testing, Tucson

    (520) 551-7887October 13, 2026cite ↗

  27. Kage L Anderson

    Western Technologies (certerra)

    current NRPP № 115214

    testing, Tucson

    (520) 444-8639October 13, 2026cite ↗

  28. Kenna Karjala

    Ninyo & Moore

    current NRPP № 114251

    testing, Tucson

    (520) 910-3644October 13, 2026cite ↗

  29. Steven Hunt

    Coho Environmental

    current NRPP № 108674

    testing, Vail

    (907) 299-0224October 3, 2026cite ↗

  30. Alexandra J Torrance

    Nicklaus Engineering Inc.

    current NRPP № 115200

    testing, Yuma

    (701) 793-7729October 13, 2026cite ↗

  31. Beida Chen

    Nicklaus Engineering, Inc.

    current NRPP № 110163

    testing, Yuma

    (352) 538-5539October 3, 2026cite ↗
Fig. 4 — 31 of 31 listings have a mappable place. Each pin is a current listing at the Census city or county centroid on the file, approximate. Pins that share a place are spread so you can click them. Not street addresses.

Appendix A

Questions before you hire

How do I verify a radon credential listed for Arizona?

Open the source link on this page and match the name and credential number to NRPP. Status can change after a record’s verification date. The latest record check on this page was October 13, 2026; check each record’s date. If the official page disagrees with this directory, trust the official page. We do not invent credential numbers.

Does EPA certify radon contractors?

The U.S. EPA does not certify radon contractors. EPA publishes guidance on finding a qualified radon service provider and points to state programs and national certifications. This directory is not affiliated with EPA. We do not display EPA-certified badges.

What does last verified mean on this page?

Last verified on an individual record is the date we checked its official source. The latest credential check on this page was October 13, 2026; other records may have earlier dates. We refresh the roster monthly. Current means the person appeared as currently credentialed on the source at that record’s verification date. Credentials can expire between refreshes, so follow the source link.

Appendix A.2

Before you hire

  1. Ask who holds the credential printed on this page, and ask them to show the same number. Some firms employ several credentialed people. The listing is the person or firm on the official file, not whoever answers the phone.
  2. Ask what test method or mitigation system they will use for this building. A credential is not a work plan. Testing and mitigation are separate services here, and a person appears on both lists only when the official file says they hold both.
  3. Ask how they will document test results or the finished mitigation system. Keep that document with the credential number you verified. This directory does not score jobs, publish reviews, or collect quotes.

The full checklist: Certified radon tester: what they do and how to hire one

Arizona 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 state license in Arizona. Some states require a separate state credential to work legally. Read the methodology. Credential status can change.