--- title: "Certified Radon Mitigation & Testing in Delaware County, PA | Radon Roster" description: "12 PA DEP-certified radon firms in Delaware County: 20% of basement tests at or above 4 pCi/L. Contacts, DEP cert IDs and local data." canonical: https://radonroster.com/pa/county/delaware/ --- [Pennsylvania](https://radonroster.com/)›[Counties](https://radonroster.com/pa/counties/)›Delaware # 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 Delaware**20%** Statewide**37%** Share of basement tests ≥ 4 pCi/L **2.0**median basement pCi/L **151,566**basement tests on record **#66**of 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](https://data.pa.gov/Energy-and-the-Environment/Radon-Test-Results-September-1986-Current-Annual-C/vkjb-sx3k) (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](https://radonroster.com/get-quotes/?county=delaware) [Mitigation1](#mitigation)[Testing11](#testing)Labs 0Ordered by town, then name · never by payment ## 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 * 512 Smiley St, Crum Lynne, PA * ✉ [golinchak@aol.com](mailto:golinchak@aol.com) #### Certified individuals * Olinchak, Gary (mitigation #3003) #### DEP cert IDs mitigation #3003 Source: [DEP list](https://files.dep.state.pa.us/RadiationProtection/RadonDivision/RDPortalFiles/2026/10_01/CountyMitigation.pdf), retrieved 2026-10-11 · [Claim, correct or remove this listing](https://radonroster.com/claim-listing/?firm=F3003) [**Call** (610) 909-4356](tel:6109094356) ## Radon testing (11 firms) ### Knell, Jon ✓ PA DEP certifiedTesting Aston1 certified person #### Address * 1120 Eleanor Circle, Aston, PA * ✉ [jknell@libertyinspections.com](mailto:jknell@libertyinspections.com) #### Certified individuals * Knell, Jon (testing #3699) #### DEP cert IDs testing #3699 Source: [DEP list](https://files.dep.state.pa.us/RadiationProtection/RadonDivision/RDPortalFiles/2026/10_01/CountyTest.pdf), retrieved 2026-10-11 · [Claim, correct or remove this listing](https://radonroster.com/claim-listing/?firm=F3699) [**Call** (484) 442-0424](tel:4844420424) ### Homepro Systems O ⚠ Name may be cut off in DEP records ✓ PA DEP certifiedTesting Brookhaven1 certified person #### Address * 6301 Hilltop Dr, Brookhaven, PA * ✉ [denise.hompro@comcast.net](mailto:denise.hompro@comcast.net) #### Certified individuals * Dreisbach, Jack (testing #8736) #### DEP cert IDs testing #8736 Source: [DEP list](https://files.dep.state.pa.us/RadiationProtection/RadonDivision/RDPortalFiles/2026/10_01/CountyTest.pdf), retrieved 2026-10-11 · [Claim, correct or remove this listing](https://radonroster.com/claim-listing/?firm=F8736) [**Call** (610) 328-5525](tel:6103285525) ### Hunt, Jeffrey ✓ PA DEP certifiedTesting Chadds Ford1 certified person #### Address * P.O. Box 1402, Chadds Ford, PA * ✉ [huntinspects@gmail.com](mailto:huntinspects@gmail.com) #### Certified individuals * Hunt, Jeffrey (testing #3022) #### DEP cert IDs testing #3022 Source: [DEP list](https://files.dep.state.pa.us/RadiationProtection/RadonDivision/RDPortalFiles/2026/10_01/CountyTest.pdf), retrieved 2026-10-11 · [Claim, correct or remove this listing](https://radonroster.com/claim-listing/?firm=F3022) [**Call** (302) 467-0699](tel:3024670699) ### Spoehr, Jr, Eugene ✓ PA DEP certifiedTesting Chadds Ford1 certified person #### Address * 226 A Ridge Rd, Chadds Ford, PA * ✉ [denise.homepro@comcast.net](mailto:denise.homepro@comcast.net) #### Certified individuals * Spoehr, Jr, Eugene (testing #1915) #### DEP cert IDs testing #1915 Source: [DEP list](https://files.dep.state.pa.us/RadiationProtection/RadonDivision/RDPortalFiles/2026/10_01/CountyTest.pdf), retrieved 2026-10-11 · [Claim, correct or remove this listing](https://radonroster.com/claim-listing/?firm=F1915) [**Call** (610) 328-5525](tel:6103285525) ### Boro Environmental, Inc. ✓ PA DEP certifiedTesting Glenolden4 certified people #### Address * 501 Sharp Ave, Glenolden, PA * ✉ [boroextrob@aol.com](mailto:boroextrob@aol.com) * ✉ [boroinspects@verizon.net](mailto:boroinspects@verizon.net) #### 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](https://files.dep.state.pa.us/RadiationProtection/RadonDivision/RDPortalFiles/2026/10_01/CountyTest.pdf), retrieved 2026-10-11 · [Claim, correct or remove this listing](https://radonroster.com/claim-listing/?firm=F0125) [**Call** (610) 715-9034](tel:6107159034) ### 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](https://files.dep.state.pa.us/RadiationProtection/RadonDivision/RDPortalFiles/2026/10_01/WebTestAlpha.pdf), retrieved 2026-10-11 · [Claim, correct or remove this listing](https://radonroster.com/claim-listing/?firm=F8063) [**Call** (610) 565-4181](tel:6105654181) ### 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](https://files.dep.state.pa.us/RadiationProtection/RadonDivision/RDPortalFiles/2026/10_01/WebTestAlpha.pdf), retrieved 2026-10-11 · [Claim, correct or remove this listing](https://radonroster.com/claim-listing/?firm=F8473) [**Call** (610) 565-4181](tel:6105654181) ### Peda, Dominick ✓ PA DEP certifiedTesting Media1 certified person #### Address * 40 N Feathering Ln, Media, PA * ✉ [dtpeda@comcast.net](mailto:dtpeda@comcast.net) #### Certified individuals * Peda, Dominick (testing #2624) #### DEP cert IDs testing #2624 Source: [DEP list](https://files.dep.state.pa.us/RadiationProtection/RadonDivision/RDPortalFiles/2026/10_01/CountyTest.pdf), retrieved 2026-10-11 · [Claim, correct or remove this listing](https://radonroster.com/claim-listing/?firm=F2624) [**Call** (610) 891-6611](tel:6108916611) ### Fiorelli, Stephen J. ✓ PA DEP certifiedTesting Ridley Park1 certified person #### Address * 700 Braxton Rd, Ridley Park, PA * ✉ [qualityradonandpest@gmail.com](mailto:qualityradonandpest@gmail.com) #### Certified individuals * Fiorelli, Stephen J. (testing #1609) #### DEP cert IDs testing #1609 Source: [DEP list](https://files.dep.state.pa.us/RadiationProtection/RadonDivision/RDPortalFiles/2026/10_01/CountyTest.pdf), retrieved 2026-10-11 · [Claim, correct or remove this listing](https://radonroster.com/claim-listing/?firm=F1609) [**Call** (610) 583-4738](tel:6105834738) ### Bednar, Jr., Michael ✓ PA DEP certifiedTesting Springfield1 certified person #### Address * 265 Hemlock Ln, Springfield, PA * ✉ [ecs\_pa@hotmail.com](mailto:ecs_pa@hotmail.com) #### Certified individuals * Bednar, Jr., Michael (testing #3740) #### DEP cert IDs testing #3740 Source: [DEP list](https://files.dep.state.pa.us/RadiationProtection/RadonDivision/RDPortalFiles/2026/10_01/CountyTest.pdf), retrieved 2026-10-11 · [Claim, correct or remove this listing](https://radonroster.com/claim-listing/?firm=F3740) [**Call** (610) 710-9450](tel:6107109450) ### 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](https://files.dep.state.pa.us/RadiationProtection/RadonDivision/RDPortalFiles/2026/10_01/WebTestAlpha.pdf), retrieved 2026-10-11 · [Claim, correct or remove this listing](https://radonroster.com/claim-listing/?firm=F8354) [**Call** (610) 604-9996](tel:6106049996) ## Neighboring counties [Chester](https://radonroster.com/pa/county/chester/) (18 firms) · [Montgomery](https://radonroster.com/pa/county/montgomery/) (29 firms) · [Philadelphia](https://radonroster.com/pa/county/philadelphia/) (10 firms). Firms often serve across county lines. Adjacency from U.S. Census Bureau county adjacency file. ## City pages & guides [Media](https://radonroster.com/pa/city/media-pa/) ([guide](https://radonroster.com/pa/city/media-pa/radon-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. * **Verify:** check the firm in the [PA DEP Radon Services Directory](https://www.pa.gov/agencies/dep/programs-and-services/radiation-protection/radon-division/radon-services-directory), ask for the DEP ID ([25 Pa. Code Chapter 240](https://files.dep.state.pa.us/RadiationProtection/BureauOfRadiationProtection/BRPPortalFiles/Chapter_240_2015-04-23.pdf)), or call 800-237-2366. * **Typical cost:** $786-$1,274 for a mitigation system, national range from the [HomeAdvisor cost guide](https://www.homeadvisor.com/cost/environmental-safety/remove-radon-gas/). * **Selling or buying:** PA's seller disclosure form asks about known radon and past tests ([49 Pa. Code § 35.335a](https://www.pacodeandbulletin.gov/secure/pacode/data/049/chapter35/s35.335a.html)). Detailed local guides: [How to find a radon expert in Media](https://radonroster.com/pa/city/media-pa/radon-guide/) ## 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 mitigators[Request quotes](https://radonroster.com/get-quotes/?county=delaware) Our advice ## Before you hire in Delaware 1. Ask for the DEP cert ID and match it to the listing. 2. Get at least two written quotes for mitigation. 3. Retest after the system is installed. PA Radon Hotline **800-237-2366** Typical mitigation cost $786–$1,274 National range (HomeAdvisor). No local price data; quotes vary by foundation type. [Estimate your cost →](https://radonroster.com/radon-mitigation-cost/) ## Want firms to contact you? Send one request to certified mitigators who serve Delaware. [Request quotes](https://radonroster.com/get-quotes/?county=delaware)