Radon Testing CompaniesColorado — testing
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§ 4.1 — Thornton, CO

Radon testing in Thornton, CO

This page lists 7 people and firms with a current radon testing credential whose official record names Thornton, CO. Each row shows the credential number, the issuing body, and its own verification date. The latest record check on this page was September 11, 2026; other records may have been checked earlier. Source: CO DORA. Verify the number before you hire.

Latest credential check September 11, 2026. Methodology Individual record dates may be earlier. CO DORA.

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 pages when the official file says they hold both.

  1. Aberle, Eric

    current CO DORA № RME-266

    testing

    September 11, 2026cite ↗

  2. Bates, Johnny

    current CO DORA № RME-645

    testing

    September 11, 2026cite ↗

  3. Carter, Zachary

    current CO DORA № RME-653

    testing

    September 11, 2026cite ↗

  4. Doughty, Albert, James

    current CO DORA № RME-293

    testing

    September 11, 2026cite ↗

  5. Gabaldon, Thomas

    current CO DORA № RME-700

    testing

    September 11, 2026cite ↗

  6. Madera-ramirez, Oscar

    current CO DORA № RME-648

    testing

    September 11, 2026cite ↗

  7. Pratt, Kelsey

    current CO DORA № RME-755

    testing

    September 11, 2026cite ↗
Fig. 4 — 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 Thornton, CO?

Open the source link on this page and match the name and credential number to CO DORA. Status can change after a record’s verification date. The latest record check on this page was September 11, 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 September 11, 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

§ 4.3

Nearby places in Colorado

Colorado DORA licenses radon measurement (RME) and mitigation (RMT) professionals. The people below appear as Active on the official occupational license file we imported. Read the methodology. Credential status can change.