--- title: "Certified Radon Mitigation & Testing in Montgomery County, PA | Radon Roster" description: "29 PA DEP-certified radon firms in Montgomery County: 28% of basement tests at or above 4 pCi/L. Contacts, DEP cert IDs and local data." canonical: https://radonroster.com/pa/county/montgomery/ --- [Pennsylvania](https://radonroster.com/)›[Counties](https://radonroster.com/pa/counties/)›Montgomery # Radon testing & mitigation in Montgomery County, PA 28% of basement tests here came back at or above 4 pCi/L, well below the statewide 37%. That means about one in 4 homes tested needs a fix. ## Montgomery County radon test data Montgomery**28%** Statewide**37%** Share of basement tests ≥ 4 pCi/L **2.4**median basement pCi/L **296,621**basement tests on record **#63**of 67 PA counties by share ≥ 4 First floor: **12%** of 55,573 tests ≥ 4 pCi/L, median 1.3 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. **29 DEP-certified firms** have a business address in Montgomery County (8 offer mitigation), with 59 certified individuals between them. [Get free quotes](https://radonroster.com/get-quotes/?county=montgomery) [Mitigation8](#mitigation)[Testing21](#testing)Labs 0Ordered by town, then name · never by payment ## Radon mitigation (reduction systems) (8 firms) Firms certified to install radon reduction systems. Firms that also test are shown here once. ### Yorgey, David ✓ PA DEP certifiedMitigation Conshohocken1 certified person #### Address * 347 Roberts Ave, Conshohocken, PA * ✉ [primeradonmitigation@gmail.com](mailto:primeradonmitigation@gmail.com) #### Certified individuals * Yorgey, David (mitigation #3758) #### DEP cert IDs mitigation #3758 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=F3758) [**Call** (215) 510-6762](tel:2155106762) ### Accurate Radon Control Inc ✓ PA DEP certifiedMitigationTesting Green Lane2 certified people #### Address * Po Box 296, Green Lane, PA * ✉ [dave@accurateradoncontrol.com](mailto:dave@accurateradoncontrol.com) * [accurateradoncontrol.com](https://accurateradoncontrol.com/) #### 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](https://files.dep.state.pa.us/RadiationProtection/RadonDivision/RDPortalFiles/2026/10_01/CountyMitigation.pdf) [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=F2112) [**Call** (215) 541-1557](tel:2155411557) ### Gentry, Timothy J. ✓ PA DEP certifiedMitigationTesting Horsham1 certified person #### Address * Po Box 1642, Horsham, PA * ✉ [homeinspectiondetective@comcast.net](mailto:homeinspectiondetective@comcast.net) #### Certified individuals * Gentry, Timothy J. (testing #2217, mitigation #2217) #### DEP cert IDs mitigation #2217 · testing #2217 Source: [DEP list](https://files.dep.state.pa.us/RadiationProtection/RadonDivision/RDPortalFiles/2026/10_01/CountyMitigation.pdf) [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=F2217) [**Call** (215) 672-8529](tel:2156728529) ### Air Quality Control, Inc. ✓ PA DEP certifiedMitigation King Of Prussia1 certified person #### Address * 630 Freedom Business Ctr, King Of Prussia, PA * ✉ [roger@aqc-radon.com](mailto:roger@aqc-radon.com) * [aqc-radon.com](http://www.aqc-radon.com/) #### Certified individuals * Burens, Jr., Roger (mitigation #1862) #### DEP cert IDs mitigation #1862 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=F1862) [**Call** (610) 239-4212](tel:6102394212) ### Airotox ✓ PA DEP certifiedMitigation Lansdale3 certified people #### Address * 14 E Main St, Lansdale, PA * ✉ [info@airotox.com](mailto:info@airotox.com) * [airotox.com](https://airotox.com/) #### 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](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=F2741) [**Call** (215) 247-6869](tel:2152476869) ### The Radon Bros ✓ PA DEP certifiedMitigationTesting Perkiomenville2 certified people #### Address * 2522 Deep Creek Rd, Perkiomenville, PA * ✉ [ballen@theradonbros.com](mailto:ballen@theradonbros.com) * ✉ [thollingsworth@theradonbros.com](mailto:thollingsworth@theradonbros.com) * [theradonbros.com](https://theradonbros.com/) #### Certified individuals * Allen, Brian (testing #3585) * Hollingsworth, Thomas (testing #2749, mitigation #2749) #### DEP cert IDs mitigation #2749 · testing #2749 · testing #3585 Source: [DEP list](https://files.dep.state.pa.us/RadiationProtection/RadonDivision/RDPortalFiles/2026/10_01/CountyMitigation.pdf) [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=F2749) [**Call** (484) 460-9697](tel:4844609697) ### Radon-Rid LLC ✓ PA DEP certifiedMitigationTesting Phoenixville1 certified person #### Address * 693 Egypt Rd, Phoenixville, PA * ✉ [info@radonrid.com](mailto:info@radonrid.com) * [radonrid.com](https://www.radonrid.com/) #### Certified individuals * Marino, Marc A. (testing #2585, mitigation #2585) #### DEP cert IDs mitigation #2585 · mitigation #2586 · testing #2585 Source: [DEP list](https://files.dep.state.pa.us/RadiationProtection/RadonDivision/RDPortalFiles/2026/10_01/CountyMitigation.pdf) [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=F2585) [**Call** (610) 222-2273](tel:6102222273) ### Radon Technology & Enviromental Inc ✓ PA DEP certifiedMitigation Royersford5 certified people #### Address * 828 Oak St, Royersford, PA * ✉ [info@wefixradon.com](mailto:info@wefixradon.com) #### 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](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=F1308) [**Call** (610) 495-2810](tel:6104952810) ## Radon testing (21 firms) ### Clerkin, Diane ✓ PA DEP certifiedTesting Ambler1 certified person #### Address * 424 Marion Ave, Ambler, PA * ✉ [dclerkin99@verizon.net](mailto:dclerkin99@verizon.net) #### Certified individuals * Clerkin, Diane (testing #2247) #### DEP cert IDs testing #2247 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=F2247) [**Call** (215) 896-1922](tel:2158961922) ### D-Tech Inc ✓ PA DEP certifiedTesting Blue Bell1 certified person #### Address * Po Box 902, Blue Bell, PA * ✉ [gregkope1@aol.com](mailto:gregkope1@aol.com) #### Certified individuals * Notwick, Stephen (testing #8836) #### DEP cert IDs testing #8836 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=F8836) [**Call** (215) 233-5888](tel:2152335888) ### D-Tech, Inc. ✓ PA DEP certifiedTesting Blue Bell1 certified person #### Address * Po Box 902, Blue Bell, PA * ✉ [greg@d-techinc.com](mailto:greg@d-techinc.com) * [d-techinc.com](https://d-techinc.com/) #### Certified individuals * Kopenhaver, Gregory (testing #1941) #### DEP cert IDs testing #0317 · testing #1941 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=F0317) [**Call** (215) 233-5888](tel:2152335888) ### Radon Testing Systems ✓ PA DEP certifiedTesting Collegeville2 certified people #### Address * 427 Franklin Court, Collegeville, PA * ✉ [cdarcy.radonts@gmail.com](mailto:cdarcy.radonts@gmail.com) #### Certified individuals * D'Arcy, Christopher (testing #3566) * D'Arcy, Thomas (testing #8999) #### DEP cert IDs testing #0794 · testing #3566 · testing #8999 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=F0794) [**Call** (215) 968-1933](tel:2159681933) ### Radon Testing Systems ⚠ Name may be cut off in DEP records ✓ PA DEP certifiedTesting Collegeville4 certified people #### Address * 427 Franklin Ct, Collegeville, PA * ✉ [cdarcy.radonts@gmail.com](mailto:cdarcy.radonts@gmail.com) #### Certified individuals * D'Arcy, Laura (testing #8766) * D'Arcy, Michele (testing #8283) * Humeas, Joe (testing #8745) * Meehan, Michael (testing #8274) #### DEP cert IDs testing #8274 · testing #8283 · testing #8745 · testing #8766 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=F8274) [**Call** (215) 968-1933](tel:2159681933) ### Coppa, Joseph ✓ PA DEP certifiedTesting Conshohocken2 certified people #### Address * 806 Fayette St, Conshohocken, PA * ✉ [bmcguinness@augustmack.com](mailto:bmcguinness@augustmack.com) * ✉ [rcoppa@augustmack.com](mailto:rcoppa@augustmack.com) #### Certified individuals * Coppa, Joseph (testing #3619) * Mcguinness, Brody (testing #3737) #### DEP cert IDs testing #3619 · testing #3737 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=F3619) [**Call** (610) 639-3866](tel:6106393866) ### Bancroft, Jason C. ✓ PA DEP certifiedTesting Gilbertsville1 certified person #### Address * Po Box 261, Gilbertsville, PA * ✉ [jason@bancroftinspections.com](mailto:jason@bancroftinspections.com) #### Certified individuals * Bancroft, Jason C. (testing #2719) #### DEP cert IDs testing #2719 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=F2719) [**Call** (484) 504-9876](tel:4845049876) ### A1 House Prep, LLC ✓ PA DEP certifiedTesting Harleysville2 certified people #### Address * 340 Freed Rd, Harleysville, PA * ✉ [a1houseprep@gmail.com](mailto:a1houseprep@gmail.com) #### Certified individuals * Johnson, Donna (testing #8641) * Johnson, Robert (testing #2427) #### DEP cert IDs testing #2427 · testing #8641 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=F2427) [**Call** (215) 853-8226](tel:2158538226) ### Musselman Home Ins ⚠ Name may be cut off in DEP records ✓ PA DEP certifiedTesting Harleysville1 certified person #### Address * 470 Creekview Dr, Harleysville, PA * ✉ [musselmanhomeinspection@gmail.com](mailto:musselmanhomeinspection@gmail.com) #### Certified individuals * Miseyko, David (testing #8847) #### DEP cert IDs testing #8847 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=F8847) [**Call** (267) 328-4663](tel:2673284663) ### Musselman Home Inspection LLC ✓ PA DEP certifiedTesting Harleysville3 certified people #### Address * 517 Park Ave, Harleysville, PA * ✉ [musselmanhomeinspection@gmail.com](mailto:musselmanhomeinspection@gmail.com) * ✉ [musselmanhomesinspection@gmail.com](mailto:musselmanhomesinspection@gmail.com) #### Certified individuals * Millspaugh, Gary (testing #9129) * Musselman, Jonathan (testing #2962) * Speak, David (testing #8958) #### DEP cert IDs testing #2962 · testing #3381 · testing #8958 · testing #9129 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=F2962) [**Call** (267) 328-4663](tel:2673284663) ### Hillerby, Dana ✓ PA DEP certifiedTesting Hatfield1 certified person #### Address * 237 Mill Rd, Hatfield, PA * ✉ [dhillerby@verizon.net](mailto:dhillerby@verizon.net) #### Certified individuals * Hillerby, Dana (testing #2794) #### DEP cert IDs testing #2794 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=F2794) [**Call** (267) 627-2252](tel:2676272252) ### First Choice Rn Tes ⚠ Name may be cut off in DEP records ✓ PA DEP certifiedTesting Huntingdon Valle3 certified people #### Address * Po Box 830, Huntingdon Valle, PA * ✉ [firstchoiceinspection@comcast.net](mailto:firstchoiceinspection@comcast.net) #### Certified individuals * Hyatt, Anders (testing #8317) * Peters, Hans (testing #8235) * Synnestvedt, Frank (testing #8253) #### DEP cert IDs testing #8235 · testing #8253 · testing #8317 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=F8235) [**Call** (215) 947-1995](tel:2159471995) ### Eslinger, Christopher ✓ PA DEP certifiedTesting Lansdale1 certified person #### Address * 421 Derstine Ave, Lansdale, PA * ✉ [inspectallhomespa@gmail.com](mailto:inspectallhomespa@gmail.com) #### Certified individuals * Eslinger, Christopher (testing #3289) #### DEP cert IDs testing #3289 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=F3289) [**Call** (267) 902-6421](tel:2679026421) ### Spy Inspection Services, Inc. ✓ PA DEP certifiedTesting Lansdale6 certified people #### Address * 14 E Main St Ste 100, Lansdale, PA * ✉ [bud.ricci@spyinspections.com](mailto:bud.ricci@spyinspections.com) * [spyinspections.com](https://spyinspections.com/) #### Certified individuals * Achuff, Mark (testing #8555) * Achuff, Matthew (testing #8668) * Gallen, Brian (testing #8693) * Lendzinski, Adam (testing #9150) * Ray, Richard (testing #8339) * Ricci, Harvey (testing #2042) #### DEP cert IDs testing #2042 · testing #2043 · testing #8339 · testing #8555 · testing #8668 · testing #8693 · testing #9150 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=F2042) [**Call** (215) 362-1234](tel:2153621234) ### Fabri, Niko ✓ PA DEP certifiedTesting Norristown2 certified people #### Address * 164 Liberty Ave, Norristown, PA * ✉ [aiman.omar@ao-homeinspections.com](mailto:aiman.omar@ao-homeinspections.com) * ✉ [niko.fabri@ao-homeinspections.com](mailto:niko.fabri@ao-homeinspections.com) * [ao-homeinspections.com](https://www.ao-homeinspections.com/) #### Certified individuals * Fabri, Niko (testing #3722) * Omar, Aiman (testing #3621) #### DEP cert IDs testing #3621 · testing #3722 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=F3621) [**Call** (215) 313-7499](tel:2153137499) ### Underwood, Kyle ✓ PA DEP certifiedTesting Norristown1 certified person #### Address * 1004 Montgomery Ave, Norristown, PA * ✉ [kyleunderwood@buildingtrustinspections.com](mailto:kyleunderwood@buildingtrustinspections.com) * [buildingtrustinspections.com](https://www.buildingtrustinspections.com/) #### Certified individuals * Underwood, Kyle (testing #3195) #### DEP cert IDs testing #3195 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=F3195) [**Call** (267) 407-8808](tel:2674078808) ### Long, Tyler ✓ PA DEP certifiedTesting Pennsburg4 certified people #### Address * 722 Main St, Pennsburg, PA * ✉ [josh.kurtz@npiinspect.com](mailto:josh.kurtz@npiinspect.com) * ✉ [justin.mccurry@npiinspect.com](mailto:justin.mccurry@npiinspect.com) #### Certified individuals * Kurtz, Joshua (testing #3645) * Long, Tyler (testing #3351) * Mccurry, Justin (testing #3286) * Thayer, Benjamin (testing #3574) #### DEP cert IDs testing #3286 · testing #3351 · testing #3574 · testing #3645 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=F3286) [**Call** (610) 737-7274](tel:6107377274) ### Spotlight Home Inspection LLC ✓ PA DEP certifiedTesting Perkiomenville2 certified people #### Address * Po Box 75, Perkiomenville, PA * ✉ [offfice@spotlighthi.com](mailto:offfice@spotlighthi.com) * ✉ [office@spotlighthi.com](mailto:office@spotlighthi.com) * [spotlighthomeinspection.com](https://spotlighthomeinspection.com/) #### Certified individuals * Burgess, Randall (testing #3382) * Wright, John (testing #8813) #### DEP cert IDs testing #3341 · testing #3382 · testing #8813 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=F3341) [**Call** (215) 234-0505](tel:2152340505) ### Armored Home Inspections, LLC ✓ PA DEP certifiedTesting Pottstown3 certified people #### Address * 1451 N Hanover St, Pottstown, PA * ✉ [info@armoredhomeinspections.com](mailto:info@armoredhomeinspections.com) * [armoredhomeinspections.com](https://armoredhomeinspections.com/) #### Certified individuals * Niles, Curtis (testing #2495) * Niles, Lori (testing #8542) * Niles, Manasseh (testing #9084) #### DEP cert IDs testing #2495 · testing #2496 · testing #8542 · testing #9084 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=F2495) [**Call** (610) 352-2212](tel:6103522212) ### Labar, John ✓ PA DEP certifiedTesting Pottstown1 certified person #### Address * 983 W Cedarville Rd, Pottstown, PA * ✉ [jslradontesting@gmail.com](mailto:jslradontesting@gmail.com) #### Certified individuals * Labar, John (testing #3178) #### DEP cert IDs testing #3178 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=F3178) [**Call** (610) 551-8892](tel:6105518892) ### Lennox, Craig ✓ PA DEP certifiedTesting Trooper1 certified person #### Address * 2801 Soni Dr, Trooper, PA * ✉ [cplennox@verizon.net](mailto:cplennox@verizon.net) #### Certified individuals * Lennox, Craig (testing #2771) #### DEP cert IDs testing #2771 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=F2771) [**Call** (610) 277-4953](tel:6102774953) ## Neighboring counties [Berks](https://radonroster.com/pa/county/berks/) (9 firms) · [Bucks](https://radonroster.com/pa/county/bucks/) (19 firms) · [Chester](https://radonroster.com/pa/county/chester/) (18 firms) · [Delaware](https://radonroster.com/pa/county/delaware/) (12 firms) · [Lehigh](https://radonroster.com/pa/county/lehigh/) (11 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 [King of Prussia](https://radonroster.com/pa/city/king-of-prussia-pa/) ([guide](https://radonroster.com/pa/city/king-of-prussia-pa/radon-guide/)) · [Lansdale](https://radonroster.com/pa/city/lansdale-pa/) ([guide](https://radonroster.com/pa/city/lansdale-pa/radon-guide/)) · [Norristown](https://radonroster.com/pa/city/norristown-pa/) ([guide](https://radonroster.com/pa/city/norristown-pa/radon-guide/)) ## Hiring a radon pro in Montgomery County: quick guide With 28% of 296,621 basement tests at or above 4 pCi/L (below the 37% statewide share), Montgomery County has 8 DEP-certified mitigation firms 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 King of Prussia](https://radonroster.com/pa/city/king-of-prussia-pa/radon-guide/) · [How to find a radon expert in Lansdale](https://radonroster.com/pa/city/lansdale-pa/radon-guide/) · [How to find a radon expert in Norristown](https://radonroster.com/pa/city/norristown-pa/radon-guide/) ## Frequently asked questions **How many certified radon mitigation firms are in Montgomery County?** 8 DEP-certified firms offering mitigation and 29 certified radon firms in total list a business address in Montgomery County (PA DEP lists dated 10/01/2026). Firms from neighboring counties may also serve the area. **What share of Montgomery County radon tests are high?** 28% of 296,621 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 Montgomery 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 Montgomery mitigators[Request quotes](https://radonroster.com/get-quotes/?county=montgomery) Our advice ## Before you hire in Montgomery 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 Montgomery. [Request quotes](https://radonroster.com/get-quotes/?county=montgomery)