--- title: "Certified Radon Mitigation & Testing in Chester County, PA | Radon Roster" description: "18 PA DEP-certified radon firms in Chester County: 31% of basement tests at or above 4 pCi/L. Contacts, DEP cert IDs and local data." canonical: https://radonroster.com/pa/county/chester/ --- [Pennsylvania](https://radonroster.com/)›[Counties](https://radonroster.com/pa/counties/)›Chester # 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 Chester**31%** Statewide**37%** Share of basement tests ≥ 4 pCi/L **2.4**median basement pCi/L **212,529**basement tests on record **#58**of 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](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. **18 DEP-certified firms** have a business address in Chester County (3 offer mitigation), with 28 certified individuals between them. [Get free quotes](https://radonroster.com/get-quotes/?county=chester) [Mitigation3](#mitigation)[Testing15](#testing)Labs 0Ordered by town, then name · never by payment ## 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 * 116 Gay Street #186, Phoenixville, PA * ✉ [spencerconradinspect@gmail.com](mailto:spencerconradinspect@gmail.com) #### Certified individuals * Conrad, Spencer (testing #3020, mitigation #3020) #### DEP cert IDs mitigation #3020 · testing #3020 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=F3020) [**Call** (570) 573-8159](tel:5705738159) ### Gutridge Inspections ✓ PA DEP certifiedMitigationTesting Pottstown1 certified person #### Address * 1614 Laurelwood Rd, Pottstown, PA * ✉ [office@gutridgeinspections.com](mailto:office@gutridgeinspections.com) * [gutridgeinspections.com](https://www.gutridgeinspections.com/) #### Certified individuals * Gutridge, Charles (testing #2973, mitigation #2973) #### DEP cert IDs mitigation #2973 · testing #2973 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=F2973) [**Call** (610) 385-3339](tel:6103853339) ### Safe Shelter Environmental ✓ PA DEP certifiedMitigationTesting West Chester6 certified people #### Address * 7 S Wayne St, West Chester, PA * ✉ [joe@safeshelter.com](mailto:joe@safeshelter.com) * [safeshelter.com](https://safeshelter.com/) #### 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](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=F0207) [**Call** (610) 594-0350](tel:6105940350) ## Radon testing (15 firms) ### Homer Inspection Services ✓ PA DEP certifiedTesting Atglen4 certified people #### Address * 501 York Rd, Atglen, PA * ✉ [office@homerinspect.com](mailto:office@homerinspect.com) * [homerinspect.com](https://www.homerinspect.com/) #### 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](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=F3196) [**Call** (610) 314-6155](tel:6103146155) ### Rafiq, Hamid ✓ PA DEP certifiedTesting Berwyn1 certified person #### Address * Po Box 681, Berwyn, PA * ✉ [inspections@tek21solutions.com](mailto:inspections@tek21solutions.com) #### Certified individuals * Rafiq, Hamid (testing #3552) #### DEP cert IDs testing #3552 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=F3552) [**Call** (484) 999-0353](tel:4849990353) ### Arms, Jr., Jeffrey ✓ PA DEP certifiedTesting Chester Springs1 certified person #### Address * 2342 Miller Rd, Chester Springs, PA * ✉ [jeff@armshomeinspection.com](mailto:jeff@armshomeinspection.com) * [armshomeinspection.com](https://armshomeinspection.com/) #### Certified individuals * Arms, Jr., Jeffrey (testing #2925) #### DEP cert IDs testing #2925 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=F2925) [**Call** (610) 850-5528](tel:6108505528) ### Dunckley, Edwin ✓ PA DEP certifiedTesting Chester Springs1 certified person #### Address * 1357 Elbow Ln, Chester Springs, PA * ✉ [ed@chestercountyhomeinspections.com](mailto:ed@chestercountyhomeinspections.com) #### Certified individuals * Dunckley, Edwin (testing #3253) #### DEP cert IDs testing #3253 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=F3253) [**Call** (484) 212-1600](tel:4842121600) ### Gordon, Margie L. ✓ PA DEP certifiedLabTesting Coatesville1 certified person #### Address * 125 Nevins Way, Coatesville, PA * ✉ [radonwomen@verizon.net](mailto:radonwomen@verizon.net) #### Certified individuals * Gordon, Margie L. (testing #1627, lab #1627) #### DEP cert IDs lab #1627 · testing #1627 Source: [DEP list](https://files.dep.state.pa.us/RadiationProtection/RadonDivision/RDPortalFiles/2026/10_01/CountyLab.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=F1627) [**Call** (610) 857-0206](tel:6108570206) ### Peach Inspections ✓ PA DEP certifiedTesting Coatesville2 certified people #### Address * 120 Cambridge Rd, Coatesville, PA * ✉ [peachinspections@gmail.com](mailto:peachinspections@gmail.com) * ✉ [steve.peachinspections@gmail.com](mailto:steve.peachinspections@gmail.com) #### Certified individuals * Robinson, Amy (testing #8606) * Robinson, Steven (testing #3356) #### DEP cert IDs testing #2288 · testing #3356 · testing #8606 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=F2288) [**Call** (610) 917-1096](tel:6109171096) ### Labar, James ✓ PA DEP certifiedTesting Downingtown1 certified person #### Address * 246 Snow Ln, Downingtown, PA * ✉ [james.labar@gmail.com](mailto:james.labar@gmail.com) #### Certified individuals * Labar, James (testing #3756) #### DEP cert IDs testing #3756 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=F3756) [**Call** (610) 909-3649](tel:6109093649) ### Saenz, Mary Ann ✓ PA DEP certifiedTesting Downingtown1 certified person #### Address * 1172 Skelp Level Rd, Downingtown, PA * ✉ [sismoldinspections@gmail.com](mailto:sismoldinspections@gmail.com) #### Certified individuals * Saenz, Mary Ann (testing #3589) #### DEP cert IDs testing #3589 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=F3589) [**Call** (610) 960-5895](tel:6109605895) ### Stumm, Brian ✓ PA DEP certifiedTesting Downingtown1 certified person #### Address * 1882 Boulder Dr, Downingtown, PA * ✉ [bstumm@abchomeinspections.net](mailto:bstumm@abchomeinspections.net) #### Certified individuals * Stumm, Brian (testing #3181) #### DEP cert IDs testing #3181 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=F3181) [**Call** (267) 331-0256](tel:2673310256) ### Kerr, Kevin ✓ PA DEP certifiedTesting Honey Brook1 certified person #### Address * 363 Hill Rd, Honey Brook, PA * ✉ [ks-kerr@hotmail.com](mailto:ks-kerr@hotmail.com) #### Certified individuals * Kerr, Kevin (testing #2757) #### DEP cert IDs testing #2757 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=F2757) [**Call** (610) 324-3064](tel:6103243064) ### Murphy, Stephen ✓ PA DEP certifiedTesting Lincoln Universi1 certified person #### Address * 104 Great Oak Dr, Lincoln Universi, PA * ✉ [stephenjmurphyinc@gmail.com](mailto:stephenjmurphyinc@gmail.com) #### Certified individuals * Murphy, Stephen (testing #3342) #### DEP cert IDs testing #3342 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=F3342) [**Call** (610) 506-0689](tel:6105060689) ### Errington, Scott ✓ PA DEP certifiedTesting Phoenixville1 certified person #### Address * 128 Sheeder Rd, Phoenixville, PA * ✉ [serrington44@gmail.com](mailto:serrington44@gmail.com) #### Certified individuals * Errington, Scott (testing #3479) #### DEP cert IDs testing #3479 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=F3479) [**Call** (610) 656-1085](tel:6106561085) ### Keogh, Daniel ✓ PA DEP certifiedTesting Phoenixville1 certified person #### Address * 590 Sandra Ln, Phoenixville, PA * ✉ [sunlightinspect@gmail.com](mailto:sunlightinspect@gmail.com) #### Certified individuals * Keogh, Daniel (testing #2109) #### DEP cert IDs testing #2109 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=F2109) [**Call** (610) 450-6056](tel:6104506056) ### The Green Valley Group ✓ PA DEP certifiedTesting Unionville2 certified people #### Address * Po Box 242, Unionville, PA * ✉ [kevin@thegreenvalleygroup.com](mailto:kevin@thegreenvalleygroup.com) * [thegreenvalleygroup.com](https://www.thegreenvalleygroup.com/) #### Certified individuals * Dickens, Matthew (testing #8882) * Thompson, Kevin (testing #2736) #### DEP cert IDs testing #2736 · testing #3433 · testing #8882 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=F2736) [**Call** (610) 347-0620](tel:6103470620) ### Inspection Service ⚠ Name may be cut off in DEP records ✓ PA DEP certifiedTesting West Chester1 certified person #### Address * 1240 West Chester Pike, Suite, West Chester, PA * ✉ [tombart@isgroup-llc.com](mailto:tombart@isgroup-llc.com) * [isgroup-llc.com](https://isgroup-llc.com/) #### Certified individuals * Farrell, Jason (testing #8877) #### DEP cert IDs testing #8877 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=F8877) [**Call** (484) 324-4500](tel:4843244500) ## Neighboring counties [Berks](https://radonroster.com/pa/county/berks/) (9 firms) · [Delaware](https://radonroster.com/pa/county/delaware/) (12 firms) · [Lancaster](https://radonroster.com/pa/county/lancaster/) (9 firms) · [Montgomery](https://radonroster.com/pa/county/montgomery/) (29 firms). Firms often serve across county lines. Adjacency from U.S. Census Bureau county adjacency file. ## City pages & guides [Phoenixville](https://radonroster.com/pa/city/phoenixville-pa/) ([guide](https://radonroster.com/pa/city/phoenixville-pa/radon-guide/)) · [West Chester](https://radonroster.com/pa/city/west-chester-pa/) ([guide](https://radonroster.com/pa/city/west-chester-pa/radon-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. * **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 Phoenixville](https://radonroster.com/pa/city/phoenixville-pa/radon-guide/) · [How to find a radon expert in West Chester](https://radonroster.com/pa/city/west-chester-pa/radon-guide/) ## 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 mitigators[Request quotes](https://radonroster.com/get-quotes/?county=chester) Our advice ## Before you hire in Chester 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 Chester. [Request quotes](https://radonroster.com/get-quotes/?county=chester)