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An independent directory built from Pennsylvania DEP certification recordsLists dated Oct 1, 2026 · About our data
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Radon testing & mitigation in Chester County, PA

31% of basement tests here came back at or above 4 pCi/L, a little under the statewide 37%. That means about one in 3 homes tested needs a fix.

Chester County radon test data

Chester31%
Statewide37%

Share of basement tests ≥ 4 pCi/L

2.4median basement pCi/L
212,529basement tests on record
#58of 67 PA counties by share ≥ 4

First floor: 20% of 28,053 tests ≥ 4 pCi/L, median 1.4

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.

18 DEP-certified firms have a business address in Chester County (3 offer mitigation), with 28 certified individuals between them. Get free quotes

Radon mitigation (reduction systems) (3 firms)

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

Conrad, Spencer

✓ PA DEP certifiedMitigationTesting
Phoenixville1 certified person

Address

Certified individuals

  • Conrad, Spencer (testing #3020, mitigation #3020)

DEP cert IDs

mitigation #3020 · testing #3020

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

Call (570) 573-8159

Gutridge Inspections

✓ PA DEP certifiedMitigationTesting
Pottstown1 certified person

Address

Certified individuals

  • Gutridge, Charles (testing #2973, mitigation #2973)

DEP cert IDs

mitigation #2973 · testing #2973

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

Call (610) 385-3339

Safe Shelter Environmental

✓ PA DEP certifiedMitigationTesting
West Chester6 certified people

Address

Certified individuals

  • Batten Jr, Joseph (testing #3525, mitigation #3525)
  • Fisicaro, Jesse (mitigation #7713)
  • Fletcher, Steven (mitigation #7715)
  • Grant, Joseph (mitigation #7717)
  • Hughes, Kareem (mitigation #7716)
  • Tavoni, Matthew (mitigation #7714)

DEP cert IDs

mitigation #0207 · mitigation #3525 · mitigation #7713 · mitigation #7714 · mitigation #7715 · mitigation #7716 · mitigation #7717 · testing #0207 · testing #3525

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

Call (610) 594-0350

Radon testing (15 firms)

Homer Inspection Services

✓ PA DEP certifiedTesting
Atglen4 certified people

Address

Certified individuals

  • Culcasi, Ian (testing #9127)
  • Homer, Ernest (testing #3196)
  • Misner, Christopher (testing #9126)
  • Schweikert, Joanne (testing #9128)

DEP cert IDs

testing #3196 · testing #3733 · testing #9126 · testing #9127 · testing #9128

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

Call (610) 314-6155

Rafiq, Hamid

✓ PA DEP certifiedTesting
Berwyn1 certified person

Address

Certified individuals

  • Rafiq, Hamid (testing #3552)

DEP cert IDs

testing #3552

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

Call (484) 999-0353

Arms, Jr., Jeffrey

✓ PA DEP certifiedTesting
Chester Springs1 certified person

Address

Certified individuals

  • Arms, Jr., Jeffrey (testing #2925)

DEP cert IDs

testing #2925

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

Call (610) 850-5528

Dunckley, Edwin

✓ PA DEP certifiedTesting
Chester Springs1 certified person

Address

Certified individuals

  • Dunckley, Edwin (testing #3253)

DEP cert IDs

testing #3253

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

Call (484) 212-1600

Gordon, Margie L.

✓ PA DEP certifiedLabTesting
Coatesville1 certified person

Address

Certified individuals

  • Gordon, Margie L. (testing #1627, lab #1627)

DEP cert IDs

lab #1627 · testing #1627

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

Call (610) 857-0206

Peach Inspections

✓ PA DEP certifiedTesting
Coatesville2 certified people

Address

Certified individuals

  • Robinson, Amy (testing #8606)
  • Robinson, Steven (testing #3356)

DEP cert IDs

testing #2288 · testing #3356 · testing #8606

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

Call (610) 917-1096

Labar, James

✓ PA DEP certifiedTesting
Downingtown1 certified person

Address

Certified individuals

  • Labar, James (testing #3756)

DEP cert IDs

testing #3756

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

Call (610) 909-3649

Saenz, Mary Ann

✓ PA DEP certifiedTesting
Downingtown1 certified person

Address

Certified individuals

  • Saenz, Mary Ann (testing #3589)

DEP cert IDs

testing #3589

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

Call (610) 960-5895

Stumm, Brian

✓ PA DEP certifiedTesting
Downingtown1 certified person

Address

Certified individuals

  • Stumm, Brian (testing #3181)

DEP cert IDs

testing #3181

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

Call (267) 331-0256

Kerr, Kevin

✓ PA DEP certifiedTesting
Honey Brook1 certified person

Address

Certified individuals

  • Kerr, Kevin (testing #2757)

DEP cert IDs

testing #2757

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

Call (610) 324-3064

Murphy, Stephen

✓ PA DEP certifiedTesting
Lincoln Universi1 certified person

Address

Certified individuals

  • Murphy, Stephen (testing #3342)

DEP cert IDs

testing #3342

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

Call (610) 506-0689

Errington, Scott

✓ PA DEP certifiedTesting
Phoenixville1 certified person

Address

Certified individuals

  • Errington, Scott (testing #3479)

DEP cert IDs

testing #3479

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

Call (610) 656-1085

Keogh, Daniel

✓ PA DEP certifiedTesting
Phoenixville1 certified person

Address

Certified individuals

  • Keogh, Daniel (testing #2109)

DEP cert IDs

testing #2109

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

Call (610) 450-6056

The Green Valley Group

✓ PA DEP certifiedTesting
Unionville2 certified people

Address

Certified individuals

  • Dickens, Matthew (testing #8882)
  • Thompson, Kevin (testing #2736)

DEP cert IDs

testing #2736 · testing #3433 · testing #8882

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

Call (610) 347-0620

Inspection Service

⚠ Name may be cut off in DEP records
✓ PA DEP certifiedTesting
West Chester1 certified person

Address

Certified individuals

  • Farrell, Jason (testing #8877)

DEP cert IDs

testing #8877

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

Call (484) 324-4500

Neighboring counties

Berks (9 firms) · Delaware (12 firms) · Lancaster (9 firms) · Montgomery (29 firms). Firms often serve across county lines.

Adjacency from U.S. Census Bureau county adjacency file.

City pages & guides

Phoenixville (guide) · West Chester (guide)

Hiring a radon pro in Chester County: quick guide

With 31% of 212,529 basement tests at or above 4 pCi/L (below the 37% statewide share), Chester County has 3 DEP-certified mitigation firms based locally.

Detailed local guides: How to find a radon expert in Phoenixville · How to find a radon expert in West Chester

Frequently asked questions

How many certified radon mitigation firms are in Chester County?

3 DEP-certified firms offering mitigation and 18 certified radon firms in total list a business address in Chester County (PA DEP lists dated 10/01/2026). Firms from neighboring counties may also serve the area.

What share of Chester County radon tests are high?

31% of 212,529 basement tests in PA DEP's records were at or above EPA's 4 pCi/L action level, with a median of 2.4 pCi/L.

How much does radon mitigation cost in Chester County?

We don't have county-specific price data. A national cost guide reports typical installs at $786-$1,274. Get written quotes from DEP-certified mitigators.

Want firms to contact you?One request to Chester mitigatorsRequest quotes