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


Groundwater Data

by Basin, County, Hydrologic Unit, or site ID
by Map Interface
Groundwater Toolbox
  • Groundwater Watch
    Compare current groundwater levels to historical record
  • WaterAlert
    Get condition updates by text message or email
  • NWIS Mapper
    View the locations of sites with USGS water data

Groundwater Information and Studies

Data Applications and Highlights

U.S. Geological Survey Ground-Water Climate Response Network

Recent Groundwater Publications (full listing)

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