Region
Pennsylvania
73
Chester County
23
Berks County
4
Bucks County
4
Lancaster County
4
Maryland
4
Delaware
3
Montgomery County
3
New Castle County
3
Philadelphia
3
Adams County
2
Carroll County
2
Ivyland
2
Lebanon County
2
Lehigh County
2
Marsh Creek (Tioga County)
2
Oley (Township)
2
Philadelphia Metropolitan Area
2
Pittsburgh
2
Allegheny County
1
Allegheny County (Pa.)
1
Bradford County
1
Carroll Valley
1
Conestoga River Watershed
1
Dauphin County Conservation District (Pa.)
1
Greene County
1
Neshaminy Creek Watershed
1
Neshaminy State Park
1
Susquehanna River Watershed
1
Valley Creek (Pa.)
1
Warminster
1
Warminster (Pa.)
1
West Virginia
1