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Radon testing & mitigation in Philadelphia, PA

Philadelphia sits in Philadelphia County. In the PA DEP test dataset, 144,527 basement radon tests carry a Philadelphia address. Their median was 1.6 pCi/L, and 12% came in at or above EPA's 4 pCi/L action level. Across all of Philadelphia County it was 12%, and statewide 37%. Even where the average is lower, neighboring houses can test very differently, so every home should be tested.

Philadelphia radon test data

Philadelphia12%
Philadelphia Co.12%
Statewide37%

Share of basement tests ≥ 4 pCi/L

1.6median pCi/L
144,527tests on record
10firms based here

City figures come from the municipality / mailing-address name in PA DEP's Radon Test Results (computed 2026-10-11). They count tests, not homes.

Below are the PA DEP-certified firms with a business address in Philadelphia, then other firms in Philadelphia County, then mitigation firms in the counties next door. Certified pros often travel, so ask each one whether they cover your street.

Read the Philadelphia radon hiring guide → (how to verify certification, questions to ask, costs, FAQ)

Firms based in Philadelphia (10)

Radon mitigation (reduction systems) (2 firms)

Firms certified to install radon reduction systems. Firms that also test are shown here once.

Rvs Radon Mitigation

⚠ Name may be cut off in DEP records
✓ PA DEP certifiedMitigation
Philadelphia1 certified person

Address

  • 294 E Cheltenham Ave, Philadelphia, PA

Certified individuals

  • Tabora, Bryann (mitigation #7735)

DEP cert IDs

mitigation #7735

Source: DEP list, retrieved 2026-10-11 · Claim, correct or remove this listing

Call (267) 269-5573

Rvs Radon Mitigation, LLC.

✓ PA DEP certifiedMitigation
Philadelphia3 certified people

Address

Certified individuals

  • Bastidas, Juan D. (mitigation #7697)
  • Gonzalez, Juan Antonio (mitigation #3458)
  • Tituana, Ivan (mitigation #7725)

DEP cert IDs

mitigation #3458 · mitigation #3594 · mitigation #7697 · mitigation #7725

Source: DEP list, retrieved 2026-10-11 · Claim, correct or remove this listing

Call (267) 269-5573

Radon testing (8 firms)

Borkowski, Patrick

✓ PA DEP certifiedTesting
Philadelphia1 certified person

Address

Certified individuals

  • Borkowski, Patrick (testing #2497)

DEP cert IDs

testing #2497

Source: DEP list, retrieved 2026-10-11 · Claim, correct or remove this listing

Call (888) 927-3944

Dunn, Jr., William

✓ PA DEP certifiedTesting
Philadelphia1 certified person

Address

Certified individuals

  • Dunn, Jr., William (testing #3374)

DEP cert IDs

testing #3374

Source: DEP list, retrieved 2026-10-11 · Claim, correct or remove this listing

Call (215) 284-1737

Geo Environmental

✓ PA DEP certifiedTesting
Philadelphia1 certified person

Address

Certified individuals

  • Lerro, Joseph (testing #8701)

DEP cert IDs

testing #8701

Source: DEP list, retrieved 2026-10-11 · Claim, correct or remove this listing

Call (215) 778-7118

Lampe, Bruce D.

✓ PA DEP certifiedTesting
Philadelphia1 certified person

Address

Certified individuals

  • Lampe, Bruce D. (testing #2188)

DEP cert IDs

testing #2188

Source: DEP list, retrieved 2026-10-11 · Claim, correct or remove this listing

Call (215) 632-4220

Mazzio, Michael

✓ PA DEP certifiedTesting
Philadelphia1 certified person

Address

Certified individuals

  • Mazzio, Michael (testing #3677)

DEP cert IDs

testing #3677

Source: DEP list, retrieved 2026-10-11 · Claim, correct or remove this listing

Call (215) 280-5473

Serrano, Moises

✓ PA DEP certifiedTesting
Philadelphia1 certified person

Address

Certified individuals

  • Serrano, Moises (testing #3746)

DEP cert IDs

testing #3746

Source: DEP list, retrieved 2026-10-11 · Claim, correct or remove this listing

Call (215) 800-9528

Valueguard Usa, Inc.

✓ PA DEP certifiedTesting
Philadelphia6 certified people

Address

Certified individuals

  • Baltrush, Michael (testing #9053)
  • Gilger, Tyler (testing #9030)
  • Maralado, Matt (testing #8788)
  • Millard, Chase (testing #2740)
  • Royer, James (testing #9031)
  • Shalaway, Cory (testing #9016)

DEP cert IDs

testing #1910 · testing #2740 · testing #8788 · testing #9016 · testing #9030 · testing #9031 · testing #9053

Source: DEP list, retrieved 2026-10-11 · Claim, correct or remove this listing

Call (215) 860-3150

Yeager, Joseph

✓ PA DEP certifiedTesting
Philadelphia1 certified person

Address

Certified individuals

  • Yeager, Joseph (testing #3503)

DEP cert IDs

testing #3503

Source: DEP list, retrieved 2026-10-11 · Claim, correct or remove this listing

Call (215) 205-4453

Mitigation firms in neighboring counties (13)

Indoor Air Surgeons, LLC

✓ PA DEP certifiedMitigationBucks County
Bensalem1 certified person

Address

Certified individuals

  • Jackson, Corwin (mitigation #3063)

DEP cert IDs

mitigation #3063 · mitigation #3347

Source: DEP list, retrieved 2026-10-11 · Claim, correct or remove this listing

Call (215) 239-8628

Insight Property Services

✓ PA DEP certifiedMitigationTestingBucks County
Doylestown1 certified person

Address

Certified individuals

  • Schluth, Edward M. (testing #1990, mitigation #1990)

DEP cert IDs

mitigation #1990 · testing #1990

Source: DEP list DEP list, retrieved 2026-10-11 · Claim, correct or remove this listing

Call (215) 674-1808

The Radon Bros

✓ PA DEP certifiedMitigationTestingBucks County
Quakertown3 certified people

Address

Certified individuals

  • Griffith, Bryan (testing #9106, mitigation #7668)
  • Mcgann, Edward (testing #9104, mitigation #7712)
  • Smith, Jacob (testing #9105)

DEP cert IDs

mitigation #3556 · mitigation #7668 · mitigation #7712 · testing #3714 · testing #9104 · testing #9105 · testing #9106

Source: DEP list DEP list, retrieved 2026-10-11 · Claim, correct or remove this listing

Call (484) 460-9697

The Radon Bros

✓ PA DEP certifiedMitigationBucks County
Quakertown1 certified person

Address

Certified individuals

  • Smith, Jacob (mitigation #7699)

DEP cert IDs

mitigation #7699

Source: DEP list, retrieved 2026-10-11 · Claim, correct or remove this listing

Call (484) 460-9697

Olinchak, Gary

✓ PA DEP certifiedMitigationDelaware County
Crum Lynne1 certified person

Address

Certified individuals

  • Olinchak, Gary (mitigation #3003)

DEP cert IDs

mitigation #3003

Source: DEP list, retrieved 2026-10-11 · Claim, correct or remove this listing

Call (610) 909-4356

Accurate Radon Control Inc

✓ PA DEP certifiedMitigationTestingMontgomery County
Green Lane2 certified people

Address

Certified individuals

  • Demar, David (testing #2112, mitigation #2112)
  • Demar, Zachariah (mitigation #7709)

DEP cert IDs

mitigation #2112 · mitigation #2113 · mitigation #7709 · testing #2112

Source: DEP list DEP list, retrieved 2026-10-11 · Claim, correct or remove this listing

Call (215) 541-1557

Air Quality Control, Inc.

✓ PA DEP certifiedMitigationMontgomery County
King Of Prussia1 certified person

Address

Certified individuals

  • Burens, Jr., Roger (mitigation #1862)

DEP cert IDs

mitigation #1862

Source: DEP list, retrieved 2026-10-11 · Claim, correct or remove this listing

Call (610) 239-4212

Airotox

✓ PA DEP certifiedMitigationMontgomery County
Lansdale3 certified people

Address

Certified individuals

  • Achuff, Mark (mitigation #2741)
  • Achuff, Matthew (mitigation #7422)
  • Achuff, Ryan (mitigation #7424)

DEP cert IDs

mitigation #2741 · mitigation #3109 · mitigation #7422 · mitigation #7424

Source: DEP list, retrieved 2026-10-11 · Claim, correct or remove this listing

Call (215) 247-6869

Gentry, Timothy J.

✓ PA DEP certifiedMitigationTestingMontgomery County
Horsham1 certified person

Address

Certified individuals

  • Gentry, Timothy J. (testing #2217, mitigation #2217)

DEP cert IDs

mitigation #2217 · testing #2217

Source: DEP list DEP list, retrieved 2026-10-11 · Claim, correct or remove this listing

Call (215) 672-8529

Radon Technology & Enviromental Inc

✓ PA DEP certifiedMitigationMontgomery County
Royersford5 certified people

Address

Certified individuals

  • Carney, Matthew (mitigation #7364)
  • Hadfield, John (mitigation #7627)
  • Kollmeyer, Jr., Bruce (mitigation #3024)
  • Kollmeyer, Shane (mitigation #7441)
  • Kollmeyer, Sr, Bruce (mitigation #7047)

DEP cert IDs

mitigation #1308 · mitigation #3024 · mitigation #7047 · mitigation #7364 · mitigation #7441 · mitigation #7627

Source: DEP list, retrieved 2026-10-11 · Claim, correct or remove this listing

Call (610) 495-2810

Radon-Rid LLC

✓ PA DEP certifiedMitigationTestingMontgomery County
Phoenixville1 certified person

Address

Certified individuals

  • Marino, Marc A. (testing #2585, mitigation #2585)

DEP cert IDs

mitigation #2585 · mitigation #2586 · testing #2585

Source: DEP list DEP list, retrieved 2026-10-11 · Claim, correct or remove this listing

Call (610) 222-2273

The Radon Bros

✓ PA DEP certifiedMitigationTestingMontgomery County
Perkiomenville2 certified people

Address

Certified individuals

  • Allen, Brian (testing #3585)
  • Hollingsworth, Thomas (testing #2749, mitigation #2749)

DEP cert IDs

mitigation #2749 · testing #2749 · testing #3585

Source: DEP list DEP list, retrieved 2026-10-11 · Claim, correct or remove this listing

Call (484) 460-9697

Yorgey, David

✓ PA DEP certifiedMitigationMontgomery County
Conshohocken1 certified person

Address

Certified individuals

  • Yorgey, David (mitigation #3758)

DEP cert IDs

mitigation #3758

Source: DEP list, retrieved 2026-10-11 · Claim, correct or remove this listing

Call (215) 510-6762

Philadelphia County radon test data

Philadelphia12%
Statewide37%

Share of basement tests ≥ 4 pCi/L

1.7median basement pCi/L
155,445basement tests on record
#67of 67 PA counties by share ≥ 4

First floor: 5% of 20,065 tests ≥ 4 pCi/L, median 1.0

Source: computed 2026-10-11 from PA DEP's Radon Test Results, Sept 1986 - Current (data.pa.gov, public domain). Counts tests, not homes: repeat and post-mitigation tests are included. Only a test tells you your home's level.

All Philadelphia County listings → · Philadelphia radon guide

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