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- Delaware River Basin Commission (DRBC)27
- Pennsylvania Fish and Boat Commission24
- U.S. Geological Survey in cooperation with U.S. Environmental Protection Agency, USDA Forest Service, and other Federal, State and local partners (see dataset specific metadata under Data_Set_Credit for details).22
- SRBC9
- Environmental Resources Research Institute8
- Pennsylvania Department of Environmental Protection6
- Chesapeake Bay Program4
- Allegheny County Division of Computer Services Geographic Information Systems Group3
- City Planning Commission (PCPC) Department - GIS Division3
- David Homans, Pennsylvania Natural Heritage Program3
- Heritage Conservancy3
- Penn State ORSER/ERRI3
- Susquehanna River Basin Commission (SRBC)3
- U.S. Geological Survey3
- U.S. Geological Survey in cooperation with the U.S. Environmental Protection Agency3
- City of Philadelphia2
- City of Philadelphia - PWD2
- Natural Lands Trust with input data from PA DEP.2
- Office of Water Management, Bureau of Water Supply & Wastewater Management, Water Quality Assessment and Standards Division.2
- PAMAP Program, PA Department of Conservation and Natural Resources, Bureau of Topographic and Geologic Survey2