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§ 4.1 — Butler County, PA

Radon testing in Butler County, PA

This page lists 17 people and firms with a current radon testing credential whose official record names Butler County, PA. Each row shows the credential number, the issuing body, and its own verification date. The latest record check on this page was August 29, 2026; other records may have been checked earlier. Source: PA DEP. Verify the number before you hire.

Latest credential check August 29, 2026. Methodology Individual record dates may be earlier. PA DEP.

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. Barto, Richard

    current PA DEP № 2477

    testing

    (724) 504-2746August 29, 2026cite ↗

  2. Cilik, Ivan

    Housemaster Home Insp

    current PA DEP № 2873

    testing

    (724) 772-5593August 29, 2026cite ↗

  3. Housemaster Home Inspections

    current PA DEP № 1230

    testing

    (724) 772-5593August 29, 2026cite ↗

  4. Kampi, Brian

    current PA DEP № 2618

    testing

    (412) 367-0707August 29, 2026cite ↗

  5. Marlier, Steven

    Housemaster Home

    current PA DEP № 9096

    testing

    (724) 772-5593August 29, 2026cite ↗

  6. Onega Llc

    current PA DEP № 2522

    testing

    (724) 452-5025August 29, 2026cite ↗

  7. Onega, Richard

    Onega Llc

    current PA DEP № 2386

    testing

    (724) 452-5025August 29, 2026cite ↗

  8. Patterson, Matthew

    Pillar To Post

    current PA DEP № 9099

    testing

    (724) 816-7695August 29, 2026cite ↗

  9. Peffer, Leonard

    Onega Llc

    current PA DEP № 8897

    testing

    (724) 452-5025August 29, 2026cite ↗

  10. Petruska, Greg

    current PA DEP № 2845

    testing

    (724) 409-2019August 29, 2026cite ↗

  11. Pillar To Post - Butler Co

    current PA DEP № 3144

    testing

    (724) 816-7695August 29, 2026cite ↗

  12. Polczynski, Scott

    Housemaster Hom

    current PA DEP № 8838

    testing

    (724) 772-5593August 29, 2026cite ↗

  13. Richardson, Jr., George

    Housemast

    current PA DEP № 8664

    testing

    (724) 772-5593August 29, 2026cite ↗

  14. Ritenour, Shelbi

    current PA DEP № 3562

    testing

    (724) 504-3804August 29, 2026cite ↗

  15. Staniland, William

    current PA DEP № 2734

    testing

    (724) 742-2776August 29, 2026cite ↗

  16. Supik, Joshua

    current PA DEP № 3320

    testing

    (724) 994-0333August 29, 2026cite ↗

  17. West, Aaron

    current PA DEP № 3709

    testing

    (412) 204-6149August 29, 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 Butler County, PA?

Open the source link on this page and match the name and credential number to PA DEP. Status can change after a record’s verification date. The latest record check on this page was August 29, 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 August 29, 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 Pennsylvania

Pennsylvania DEP certifies individuals and firms that test or mitigate radon. The people below appear as currently certified on the DEP Radon Services Directory we imported. Read the methodology. Credential status can change.