---
title: "All 67 Pennsylvania Counties - Certified Radon Firms"
description: "Browse PA DEP-certified radon testing, mitigation and lab firms by Pennsylvania county."
canonical: https://radonroster.com/pa/counties/
---

# Browse by county

* [Adams](https://radonroster.com/pa/county/adams/) (6)
* [Allegheny](https://radonroster.com/pa/county/allegheny/) (44)
* [Armstrong](https://radonroster.com/pa/county/armstrong/) (2)
* [Beaver](https://radonroster.com/pa/county/beaver/) (6)
* [Bedford](https://radonroster.com/pa/county/bedford/) (1)
* [Berks](https://radonroster.com/pa/county/berks/) (9)
* [Blair](https://radonroster.com/pa/county/blair/) (3)
* [Bradford](https://radonroster.com/pa/county/bradford/) (1)
* [Bucks](https://radonroster.com/pa/county/bucks/) (19)
* [Butler](https://radonroster.com/pa/county/butler/) (12)
* [Cambria](https://radonroster.com/pa/county/cambria/) (4)
* [Cameron](https://radonroster.com/pa/county/cameron/) (0)
* [Carbon](https://radonroster.com/pa/county/carbon/) (2)
* [Centre](https://radonroster.com/pa/county/centre/) (4)
* [Chester](https://radonroster.com/pa/county/chester/) (18)
* [Clarion](https://radonroster.com/pa/county/clarion/) (0)
* [Clearfield](https://radonroster.com/pa/county/clearfield/) (1)
* [Clinton](https://radonroster.com/pa/county/clinton/) (2)
* [Columbia](https://radonroster.com/pa/county/columbia/) (2)
* [Crawford](https://radonroster.com/pa/county/crawford/) (3)
* [Cumberland](https://radonroster.com/pa/county/cumberland/) (6)
* [Dauphin](https://radonroster.com/pa/county/dauphin/) (9)
* [Delaware](https://radonroster.com/pa/county/delaware/) (12)
* [Elk](https://radonroster.com/pa/county/elk/) (1)
* [Erie](https://radonroster.com/pa/county/erie/) (6)
* [Fayette](https://radonroster.com/pa/county/fayette/) (3)
* [Forest](https://radonroster.com/pa/county/forest/) (0)
* [Franklin](https://radonroster.com/pa/county/franklin/) (5)
* [Fulton](https://radonroster.com/pa/county/fulton/) (0)
* [Greene](https://radonroster.com/pa/county/greene/) (0)
* [Huntingdon](https://radonroster.com/pa/county/huntingdon/) (3)
* [Indiana](https://radonroster.com/pa/county/indiana/) (2)
* [Jefferson](https://radonroster.com/pa/county/jefferson/) (0)
* [Juniata](https://radonroster.com/pa/county/juniata/) (0)
* [Lackawanna](https://radonroster.com/pa/county/lackawanna/) (9)
* [Lancaster](https://radonroster.com/pa/county/lancaster/) (9)
* [Lawrence](https://radonroster.com/pa/county/lawrence/) (2)
* [Lebanon](https://radonroster.com/pa/county/lebanon/) (4)
* [Lehigh](https://radonroster.com/pa/county/lehigh/) (11)
* [Luzerne](https://radonroster.com/pa/county/luzerne/) (13)
* [Lycoming](https://radonroster.com/pa/county/lycoming/) (2)
* [McKean](https://radonroster.com/pa/county/mckean/) (0)
* [Mercer](https://radonroster.com/pa/county/mercer/) (0)
* [Mifflin](https://radonroster.com/pa/county/mifflin/) (1)
* [Monroe](https://radonroster.com/pa/county/monroe/) (11)
* [Montgomery](https://radonroster.com/pa/county/montgomery/) (29)
* [Montour](https://radonroster.com/pa/county/montour/) (0)
* [Northampton](https://radonroster.com/pa/county/northampton/) (7)
* [Northumberland](https://radonroster.com/pa/county/northumberland/) (1)
* [Perry](https://radonroster.com/pa/county/perry/) (1)
* [Philadelphia](https://radonroster.com/pa/county/philadelphia/) (10)
* [Pike](https://radonroster.com/pa/county/pike/) (7)
* [Potter](https://radonroster.com/pa/county/potter/) (0)
* [Schuylkill](https://radonroster.com/pa/county/schuylkill/) (5)
* [Snyder](https://radonroster.com/pa/county/snyder/) (2)
* [Somerset](https://radonroster.com/pa/county/somerset/) (1)
* [Sullivan](https://radonroster.com/pa/county/sullivan/) (0)
* [Susquehanna](https://radonroster.com/pa/county/susquehanna/) (1)
* [Tioga](https://radonroster.com/pa/county/tioga/) (1)
* [Union](https://radonroster.com/pa/county/union/) (1)
* [Venango](https://radonroster.com/pa/county/venango/) (2)
* [Warren](https://radonroster.com/pa/county/warren/) (1)
* [Washington](https://radonroster.com/pa/county/washington/) (7)
* [Wayne](https://radonroster.com/pa/county/wayne/) (4)
* [Westmoreland](https://radonroster.com/pa/county/westmoreland/) (17)
* [Wyoming](https://radonroster.com/pa/county/wyoming/) (0)
* [York](https://radonroster.com/pa/county/york/) (8)

[Out-of-state firms certified in PA (61)](https://radonroster.com/pa/out-of-state/)