Pennsylvania Water Science Center


USGS Waterwatch:
Maps of Current Conditions

Pennsylvania Streamstats

Delineate watersheds and estimate streamflow

National Water Information System (NWIS)

View current and historical streamflow, groundwater level, and water-quality data for Pennsylvania

Real-time data

Historical data


Geographic Information Systems (GIS) Data

St. Lawrence Allegheny Ohio West Branch Susquehanna North Branch Susquehanna Delaware Monongahela Lower Susquehanna Potomac Watershed Boundaries in ARC/INFO format compressed with gzip utility

County Geology in ARC/INFO format compressed with gzip utility

Flood Mapping

Pennsylvania StreamStats (SIR 2008-5102)

Data Portals

Water/Watershed Spatial Data

Geography/Land Cover Spatial Data

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