Region
Pennsylvania
Chester County
7
United States
6
New Jersey
5
West Virginia
4
Allegheny County
3
Beaver County
3
Bucks County
3
Carbon County
3
Maryland
3
Ohio
3
Schuylkill County
3
Washington County
3
York County
3
Adams County
2
Clinton County
2
Erie County
2
Fayette County
2
Lycoming County
2
New York (State)
2
Potter County
2
Allegheny River Valley (Pa. and N.Y.)
1
Appalachian Region
1
Berks County
1
Big Elk Creek Watershed (Pa. and Md.)
1
Blue Marsh Lake Region
1
Boyertown Region
1
Brandywine Creek Watershed (Pa. and Del.)
1
California
1
Centre County
1
Clearfield County
1
Columbia County
1
Crawford County
1
Dauphin County
1
Delaware
1
Delaware River (N.Y.-Del. and N.J.)
1
Delaware River Watershed (N.Y.-Del. and N.J.)
1
Delaware Water Gap (N.J. and Pa.)
1
East Brady
1
East Brady (Pa.)
1
Elmira-Williamsport region
1
Hamburg Region
1
Houtzdale Region
1
Illinois
1
Indiana
1
Jefferson County
1
Johnstown (Cambria County)
1
Johnstown (Cambria County, Pa.)
1
Johnstown Region
1
Kentucky
1
more ...