Radon zones in Pennsylvania
Zone 1: 49, Zone 2: 17, Zone 3: 1. A zone is an area estimate; EPA says all homes should be tested.
- Adams County Zone 1
- Allegheny County Zone 1
- Armstrong County Zone 1
- Beaver County Zone 1
- Bedford County Zone 1
- Berks County Zone 1
- Blair County Zone 1
- Bradford County Zone 1
- Bucks County Zone 1
- Butler County Zone 1
- Cambria County Zone 2
- Cameron County Zone 1
- Carbon County Zone 1
- Centre County Zone 1
- Chester County Zone 1
- Clarion County Zone 1
- Clearfield County Zone 1
- Clinton County Zone 1
- Columbia County Zone 1
- Crawford County Zone 2
- Cumberland County Zone 1
- Dauphin County Zone 1
- Delaware County Zone 1
- Elk County Zone 2
- Erie County Zone 2
- Fayette County Zone 2
- Forest County Zone 2
- Franklin County Zone 1
- Fulton County Zone 1
- Greene County Zone 2
- Huntingdon County Zone 1
- Indiana County Zone 1
- Jefferson County Zone 2
- Juniata County Zone 1
- Lackawanna County Zone 1
- Lancaster County Zone 1
- Lawrence County Zone 2
- Lebanon County Zone 1
- Lehigh County Zone 1
- Luzerne County Zone 1
- Lycoming County Zone 1
- McKean County Zone 2
- Mercer County Zone 2
- Mifflin County Zone 1
- Monroe County Zone 1
- Montgomery County Zone 1
- Montour County Zone 1
- Northampton County Zone 1
- Northumberland County Zone 1
- Perry County Zone 1
- Philadelphia County Zone 3
- Pike County Zone 2
- Potter County Zone 2
- Schuylkill County Zone 1
- Snyder County Zone 1
- Somerset County Zone 2
- Sullivan County Zone 1
- Susquehanna County Zone 1
- Tioga County Zone 1
- Union County Zone 1
- Venango County Zone 1
- Warren County Zone 2
- Washington County Zone 2
- Wayne County Zone 2
- Westmoreland County Zone 1
- Wyoming County Zone 1
- York County Zone 1
County not listed? See what we left out and why. Leave your email to hear if this data changes.