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Water Science for Maryland, Delaware and the District of Columbia

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USGS Surface Water Data

The term surface water includes the rivers, streams, ponds, and lakes of Maryland, Delaware, and D.C. Data about these resources are available in either real-time or monthly.

Monthly Streamflow Levels

Current streamflow information maps are listed by county with 5 year information. This information is based on readings from streamflow gages monitored by the MD-DE-DC Water Science Center. Click here to view detailed streamflow information by site location.

Satellite Image of Chesapeake Bay

Click here to view a summary of the Chesapeake Bay monthly streamflow conditions.

Real-Time Surface Water

View Real-Time Surface Water Wells by Region:

Map of MD
  Maryland		 Map of DE
  Delaware		 Map of DC
  District of Columbia

View Real-Time Surface Water Data by Region in Table Format:

Map of MD
  Maryland		 Map of DE
  Delaware		 Map of DC
  District of Columbia

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Page Last Modified: Friday, October 24, 2014