PA DEP certificationMitigation #1966 · Testing #1965
Radon Mitigation and Testing Companies in York County
There are 35 PA DEP-certified radon companies working in York County or very close by, and we’ve thoroughly researched each one. Narrow them down by ZIP code and service, then call or message the ones you like.
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Showing 1 to 10 of 35, A to Z. Ratings load live from Google. Listings last checked Oct 2026.
PA DEP certificationMitigation #1418
Also offers: radon-resistant new constructionPA DEP certificationMitigation #3541
PA DEP certificationTesting #2858
PA DEP certificationTesting #2337
PA DEP certificationTesting #3493
PA DEP certificationTesting #3623
PA DEP certificationTesting #3532
PA DEP certificationTesting #3599
PA DEP certificationMitigation #1725 · Testing #1725
Also offers: crawlspace sub-membrane depressurization, radon-resistant new construction and 3 morePA DEP certificationTesting #1631
Also offers: continuous monitor testingPA DEP certificationTesting #3674
PA DEP certificationTesting #3267
PA DEP certificationMitigation #3748 · Testing #3747
PA DEP certificationTesting #3361
PA DEP certificationMitigation #2760 · Testing #2760
Also offers: continuous monitor testing, post-mitigation re-testingPA DEP certificationTesting #2282
PA DEP certificationTesting #3526
PA DEP certificationTesting #2795
PA DEP certificationTesting #2102
PA DEP certificationMitigation #2691
Also offers: post-mitigation re-testingPA DEP certificationTesting #3445
Also offers: well waterPA DEP certificationMitigation #3355 · Testing #3105
Also offers: sub-slab depressurizationPA DEP certificationMitigation #0275 · Testing #0275
Also offers: continuous monitor testingPA DEP certificationMitigation #0565
Also offers: radon system repairPA DEP certificationMitigation #1800 · Testing #1800
Also offers: post-mitigation re-testingPA DEP certificationTesting #3736
PA DEP certificationTesting #3013
Also offers: continuous monitor testingPA DEP certificationMitigation #2735 · Testing #2735
PA DEP certificationMitigation #3287 · Testing #3287
PA DEP certificationTesting #3283
PA DEP certificationTesting #2996
PA DEP certificationTesting #3760
PA DEP certificationTesting #3608
PA DEP certificationTesting #3743
Questions to Ask When You Call
Ask every company the same questions, then compare their answers.
Have you worked on homes like mine?Foundation type, a finished basement or a private well can change the job.
Will you get my level under 4.0?Ask if they guarantee it in writing, and what happens if they don’t.
Do you have warranty cover, and for how long?Ask about the system and the fan separately.
Who does the test after the install?By law it has to be done within 30 days. Ask if it’s included.
Where will the pipe and fan go?Inside or outside the house, and where you’ll see the pipe.
Your Home Must Be Tested After Install
By law in Pennsylvania, your home has to be tested between 24 hours and 30 days after the system is switched on. Your installer is responsible for making sure it’s done, so ask each company if it’s included in their price.
Sources: PA DEP Radon Services Directory; PA DEP: Pennsylvania Consumer's Guide to Radon Reduction; PA DEP fact sheet: Radon Mitigation Systems (2940-FS-DEP4430); 25 Pa. Code § 240.303, Reporting of information