Radon Testing CompaniesPennsylvania — testing
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§ 4.1 — Chester County, PA

Radon testing in Chester County, PA

This page lists 28 people and firms with a current radon testing credential whose official record names Chester 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. Arms, Jr., Jeffrey

    current PA DEP № 2925

    testing

    (610) 850-5528August 29, 2026cite ↗

  2. Batten Jr, Joseph

    Safe Shelter En

    current PA DEP № 3525

    mitigation, testing

    (610) 594-0350August 29, 2026cite ↗

  3. Conrad, Spencer

    current PA DEP № 3020

    mitigation, testing

    (570) 573-8159August 29, 2026cite ↗

  4. Culcasi, Ian

    Homer Inspection Ser

    current PA DEP № 9127

    testing

    (610) 314-6155August 29, 2026cite ↗

  5. Cunningham, Aaron

    current PA DEP № 3047

    testing

    (610) 322-6105August 29, 2026cite ↗

  6. Dickens, Matthew

    The Green Valley

    current PA DEP № 8882

    testing

    (610) 347-0620August 29, 2026cite ↗

  7. Dunckley, Edwin

    current PA DEP № 3253

    testing

    (484) 212-1600August 29, 2026cite ↗

  8. Errington, Scott

    current PA DEP № 3479

    testing

    (610) 656-1085August 29, 2026cite ↗

  9. Fritchey, Andrew

    current PA DEP № 3454

    testing

    (610) 836-2206August 29, 2026cite ↗

  10. Gertsen, Erik

    current PA DEP № 3308

    testing

    (610) 241-2417August 29, 2026cite ↗

  11. Gordon, Margie L.

    current PA DEP № 1627

    testing

    (610) 857-0206August 29, 2026cite ↗

  12. Homer Inspection Services

    current PA DEP № 3733

    testing

    (610) 314-6155August 29, 2026cite ↗

  13. Homer, Ernest

    current PA DEP № 3196

    testing

    (610) 314-6155August 29, 2026cite ↗

  14. Keogh, Daniel

    current PA DEP № 2109

    testing

    (610) 450-6056August 29, 2026cite ↗

  15. Kerr, Kevin

    current PA DEP № 2757

    testing

    (610) 324-3064August 29, 2026cite ↗

  16. Laporta, Jr., Ronald

    current PA DEP № 3327

    testing

    (800) 303-0555August 29, 2026cite ↗

  17. Misner, Christopher

    Homer Inspect

    current PA DEP № 9126

    testing

    (610) 314-6155August 29, 2026cite ↗

  18. Murphy, Stephen

    current PA DEP № 3342

    testing

    (610) 506-0689August 29, 2026cite ↗

  19. Peach Inspections

    current PA DEP № 2288

    testing

    (610) 917-1096August 29, 2026cite ↗

  20. Rafiq, Hamid

    current PA DEP № 3552

    testing

    (484) 999-0353August 29, 2026cite ↗

  21. Robinson, Amy

    Peach Inspections

    current PA DEP № 8606

    testing

    (610) 917-1096August 29, 2026cite ↗

  22. Robinson, Steven

    Peach Inspection

    current PA DEP № 3356

    testing

    (610) 917-1096August 29, 2026cite ↗

  23. Saenz, Mary Ann

    current PA DEP № 3589

    testing

    (610) 960-5895August 29, 2026cite ↗

  24. Safe Shelter Environmental

    current PA DEP № 0207

    mitigation, testing

    (610) 594-0350August 29, 2026cite ↗

  25. Schweikert, Joanne

    Homer Inspecti

    current PA DEP № 9128

    testing

    (610) 314-6155August 29, 2026cite ↗

  26. Stumm, Brian

    current PA DEP № 3181

    testing

    (267) 331-0256August 29, 2026cite ↗

  27. The Green Valley Group

    current PA DEP № 3433

    testing

    (610) 347-0620August 29, 2026cite ↗

  28. Thompson, Kevin-the Green Valley Gr

    current PA DEP № 2736

    testing

    (610) 347-0620August 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 Chester 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.