DRAFT PREVIEW - not yet launched. Listings are being reviewed.
An independent directory built from Pennsylvania DEP certification recordsLists dated Oct 1, 2026 · About our data
Verify a certificationGet quotes

Radon testing & mitigation in Delaware County, PA

20% of basement tests here came back at or above 4 pCi/L, well below the statewide 37%. That means about one in 5 homes tested needs a fix.

Delaware County radon test data

Delaware20%
Statewide37%

Share of basement tests ≥ 4 pCi/L

2.0median basement pCi/L
151,566basement tests on record
#66of 67 PA counties by share ≥ 4

First floor: 8% of 23,151 tests ≥ 4 pCi/L, median 1.1

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.

12 DEP-certified firms have a business address in Delaware County (1 offer mitigation), with 19 certified individuals between them. Get free quotes

Radon mitigation (reduction systems) (1 firm)

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

Olinchak, Gary

✓ PA DEP certifiedMitigation
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

Radon testing (11 firms)

Knell, Jon

✓ PA DEP certifiedTesting
Aston1 certified person

Address

Certified individuals

  • Knell, Jon (testing #3699)

DEP cert IDs

testing #3699

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

Call (484) 442-0424

Homepro Systems O

⚠ Name may be cut off in DEP records
✓ PA DEP certifiedTesting
Brookhaven1 certified person

Address

Certified individuals

  • Dreisbach, Jack (testing #8736)

DEP cert IDs

testing #8736

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

Call (610) 328-5525

Hunt, Jeffrey

✓ PA DEP certifiedTesting
Chadds Ford1 certified person

Address

Certified individuals

  • Hunt, Jeffrey (testing #3022)

DEP cert IDs

testing #3022

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

Call (302) 467-0699

Spoehr, Jr, Eugene

✓ PA DEP certifiedTesting
Chadds Ford1 certified person

Address

Certified individuals

  • Spoehr, Jr, Eugene (testing #1915)

DEP cert IDs

testing #1915

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

Call (610) 328-5525

Boro Environmental, Inc.

✓ PA DEP certifiedTesting
Glenolden4 certified people

Address

Certified individuals

  • Bruno, Rob (testing #0126)
  • Bruno, Ron (testing #8023)
  • Guttschall, Brian (testing #8541)
  • Novack, Gary (testing #9123)

DEP cert IDs

testing #0125 · testing #0126 · testing #8023 · testing #8541 · testing #9123

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

Call (610) 715-9034

House Inspect, Inc

✓ PA DEP certifiedTesting
Media2 certified people

Address

  • 601 N Olive St, Media, PA

Certified individuals

  • Bradley, Peter (testing #8154)
  • Illingworth, Blaine (testing #8063)

DEP cert IDs

testing #8063 · testing #8154

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

Call (610) 565-4181

House Inspect, Inc

✓ PA DEP certifiedTesting
Media4 certified people

Address

  • 601 North Olive Street, Media, PA

Certified individuals

  • Esposito, Fidel (testing #8473)
  • Fisher, Michael (testing #8484)
  • Greenberg, Ted (testing #8474)
  • Lawn, Cindy (testing #8485)

DEP cert IDs

testing #8473 · testing #8474 · testing #8484 · testing #8485

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

Call (610) 565-4181

Peda, Dominick

✓ PA DEP certifiedTesting
Media1 certified person

Address

Certified individuals

  • Peda, Dominick (testing #2624)

DEP cert IDs

testing #2624

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

Call (610) 891-6611

Fiorelli, Stephen J.

✓ PA DEP certifiedTesting
Ridley Park1 certified person

Address

Certified individuals

  • Fiorelli, Stephen J. (testing #1609)

DEP cert IDs

testing #1609

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

Call (610) 583-4738

Bednar, Jr., Michael

✓ PA DEP certifiedTesting
Springfield1 certified person

Address

Certified individuals

  • Bednar, Jr., Michael (testing #3740)

DEP cert IDs

testing #3740

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

Call (610) 710-9450

Castle Inspecti

⚠ Name may be cut off in DEP records
✓ PA DEP certifiedTesting
Springfield1 certified person

Address

  • 20 Thornridge Road, Springfield, PA

Certified individuals

  • Butler, Christine (testing #8354)

DEP cert IDs

testing #8354

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

Call (610) 604-9996

Neighboring counties

Chester (18 firms) · Montgomery (29 firms) · Philadelphia (10 firms). Firms often serve across county lines.

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

City pages & guides

Media (guide)

Hiring a radon pro in Delaware County: quick guide

With 20% of 151,566 basement tests at or above 4 pCi/L (below the 37% statewide share), Delaware County has 1 DEP-certified mitigation firm based locally.

Detailed local guides: How to find a radon expert in Media

Frequently asked questions

How many certified radon mitigation firms are in Delaware County?

1 DEP-certified firms offering mitigation and 12 certified radon firms in total list a business address in Delaware County (PA DEP lists dated 10/01/2026). Firms from neighboring counties may also serve the area.

What share of Delaware County radon tests are high?

20% of 151,566 basement tests in PA DEP's records were at or above EPA's 4 pCi/L action level, with a median of 2.0 pCi/L.

How much does radon mitigation cost in Delaware 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 Delaware mitigatorsRequest quotes