Philadelphia County
| Philadelphia | The Academy of Natural Sciences |
| Philadelphia | Awbury Arboretum |
| Philadelphia | Cobbs Creek Environmental Education Center |
| Philadelphia | Earth Force |
| Philadelphia | Environmental Protection Agency, Region III |
| Philadelphia | Fairmount Water Works Interpretive Center |
| Philadelphia | Fox Chase Farm |
| Philadelphia | John Heinz National Wildlife Refuge at Tinicum |
| Philadelphia | Morris Arboretum of the University of Pennsylvania |
| Philadelphia | Pennypack Environmental Center |
| Philadelphia | The Philadelphia Zoo |
| Philadelphia | Schuylkill Center for Environmental Education |
| Philadelphia | Wissahickon Environmental Center |
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