--- title: "Radon Roster - Find DEP-Certified Radon Mitigation & Testing Pros" description: "Search Pennsylvania DEP-certified radon mitigation firms, testers and labs by city, county or ZIP. Named firms, DEP cert IDs and local radon data." canonical: https://radonroster.com/ --- Pennsylvania · all 67 counties # Radon help for Pennsylvania homes, starting with your ZIP. 352 certified testing firms · short-term tests take 2–7 days 101 certified mitigation firms · get two written quotes 18 DEP-certified radon labs Enter your result, then your ZIP, city or county * **DEP ID on every listing**Check it against the state record. * **Never ranked by payment**Ordered by location and name. * **Sourced and dated**Refreshed with each DEP list. 414 certified firms (101 mitigation, 352 testing, 18 labs) and 742 certified individuals, taken from Pennsylvania DEP records. Every listing names the firm, shows its DEP IDs and links the source. Our advice ## Test before you call a mitigator. Radon varies house to house, even on the same street. A test costs far less than a system, and it tells you whether you need one at all. [Testing vs. mitigation, explained →](https://radonroster.com/testing-vs-mitigation/) ## Get two written quotes. Ask each certified mitigator for their DEP certification ID, and retest after the system is installed. A national cost guide puts typical systems at $786–$1,274. [Typical costs and estimate tool →](https://radonroster.com/radon-mitigation-cost/) ## Use a kit analyzed by a certified lab. Pennsylvania requires labs that analyze radon for the public to be DEP-certified. Follow the kit's placement and timing instructions, then mail it promptly. [What is radon? →](https://radonroster.com/what-is-radon/) ## What your number means EPA recommends fixing at 4 pCi/L or more, and considering it between 2 and 4. 024 = EPA action level [Confirming a high result →](https://radonroster.com/testing-vs-mitigation/) Already have a test result? **Check your number** Based on EPA guidance. General information, not medical advice. 1. 1 ### Test your home A short-term test takes 2–7 days. Hire a certified tester or use a mail-in kit from a DEP-certified lab. [352 testers · 18 labs→](https://radonroster.com/pa/counties/) 2. 2 ### Understand the number EPA recommends fixing at 4 pCi/L or more, and considering it between 2 and 4. [Levels in your county→](https://radonroster.com/pa/radon-levels-by-county/) 3. 3 ### Fix it if needed Get two written quotes from certified mitigators. Most systems cost $786–$1,274. [101 mitigation firms→](https://radonroster.com/pa/counties/) Radon by county ## In Allegheny County, 34% of basement tests came back high. Counties with the most certified firms | County | Tests ≥ 4 pCi/L | Percent | Firms | | --- | --- | --- | --- | | [Allegheny](https://radonroster.com/pa/county/allegheny/) | | 34% | 44 | | [Montgomery](https://radonroster.com/pa/county/montgomery/) | | 28% | 29 | | [Bucks](https://radonroster.com/pa/county/bucks/) | | 31% | 19 | | [Chester](https://radonroster.com/pa/county/chester/) | | 31% | 18 | | [Westmoreland](https://radonroster.com/pa/county/westmoreland/) | | 40% | 17 | | [Luzerne](https://radonroster.com/pa/county/luzerne/) | | 31% | 13 | | [Butler](https://radonroster.com/pa/county/butler/) | | 47% | 12 | | [Delaware](https://radonroster.com/pa/county/delaware/) | | 20% | 12 | Tick = statewide 37% · PA DEP test results, 1986–present[All 67 counties →](https://radonroster.com/pa/counties/) ### Highest share of high tests * #1[Fulton](https://radonroster.com/pa/county/fulton/)**70%** * #2[Juniata](https://radonroster.com/pa/county/juniata/)**62%** * #3[Perry](https://radonroster.com/pa/county/perry/)**61%** * #4[Lebanon](https://radonroster.com/pa/county/lebanon/)**60%** * #5[Mifflin](https://radonroster.com/pa/county/mifflin/)**59%** * #6[Franklin](https://radonroster.com/pa/county/franklin/)**59%** Share of basement tests ≥ 4 pCi/L. Only a test tells you your home's level. [Full county table →](https://radonroster.com/pa/radon-levels-by-county/) PA DEP estimates about 40% of Pennsylvania homes tested have radon above EPA's 4 pCi/L action guideline ([PA DEP Radon Division](https://www.pa.gov/agencies/dep/programs-and-services/radiation-protection/radon-division)). In DEP's test records, 37% of basement tests statewide are at or above 4 pCi/L. ## Choose your state [Live ### Pennsylvania 414 DEP-certified firms · 67 counties](https://radonroster.com/pa/counties/) Coming soon ### New York Coming soon ### New Jersey Coming soon ### Ohio Coming soon ### Maryland Coming soon ### Virginia ## Popular Pennsylvania cities [**Pittsburgh** 31% of basement tests ≥ 4 pCi/L](https://radonroster.com/pa/city/pittsburgh-pa/)[**Philadelphia** 12% of basement tests ≥ 4 pCi/L](https://radonroster.com/pa/city/philadelphia-pa/)[**Allentown** 47% of basement tests ≥ 4 pCi/L](https://radonroster.com/pa/city/allentown-pa/)[**Harrisburg** 52% of basement tests ≥ 4 pCi/L](https://radonroster.com/pa/city/harrisburg-pa/)[**Lancaster** 51% of basement tests ≥ 4 pCi/L](https://radonroster.com/pa/city/lancaster-pa/)[**York** 58% of basement tests ≥ 4 pCi/L](https://radonroster.com/pa/city/york-pa/)[**State College** 55% of basement tests ≥ 4 pCi/L](https://radonroster.com/pa/city/state-college-pa/)[**Erie** 24% of basement tests ≥ 4 pCi/L](https://radonroster.com/pa/city/erie-pa/) [All cities →](https://radonroster.com/pa/cities/) ## Popular counties [**Allegheny County** 44 certified firms · 34% of tests ≥ 4](https://radonroster.com/pa/county/allegheny/)[**Montgomery County** 29 certified firms · 28% of tests ≥ 4](https://radonroster.com/pa/county/montgomery/)[**Bucks County** 19 certified firms · 31% of tests ≥ 4](https://radonroster.com/pa/county/bucks/)[**Chester County** 18 certified firms · 31% of tests ≥ 4](https://radonroster.com/pa/county/chester/)[**Westmoreland County** 17 certified firms · 40% of tests ≥ 4](https://radonroster.com/pa/county/westmoreland/)[**Luzerne County** 13 certified firms · 31% of tests ≥ 4](https://radonroster.com/pa/county/luzerne/)[**Butler County** 12 certified firms · 47% of tests ≥ 4](https://radonroster.com/pa/county/butler/)[**Delaware County** 12 certified firms · 20% of tests ≥ 4](https://radonroster.com/pa/county/delaware/) [All 67 counties →](https://radonroster.com/pa/counties/) ## Learn before you hire * [What is radon?](https://radonroster.com/what-is-radon/) * [Radon testing vs mitigation](https://radonroster.com/testing-vs-mitigation/) * [PA radon levels by county](https://radonroster.com/pa/radon-levels-by-county/) * [Typical costs + estimate tool](https://radonroster.com/radon-mitigation-cost/) * [PA real estate radon disclosure basics](https://radonroster.com/pa/real-estate-radon-disclosure/) [Get free quotes](https://radonroster.com/get-quotes/)