Water Data

Monthly Water Conditions Report

USGS Maryland-Delaware-DC Monthly Water Conditions Summary for March 2012 USGS MD-DE-DC 2010 Water Conditions Summary Water Conditions Archives

Monthly Streamflow Levels

Current streamflow information maps are listed by county with 5 year information. Click the map below for more information. This information is based on readings from streamflow gages in the MD-DE-DC Water Science Center.

Real-Time Surface Water

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

Real-Time Streamflow Levels Hold down the Shift key and click on Reload or Refresh to make sure you have the most recent image or table.	USGS Streamgage Sites, 9-28-2010 Click the image to view a larger map.

Tide Gage Sites

Tide and Surge Links:

NOAA Tides and Currents Data
NOAA Mid-Atlantic Flood Forecasts
NOAA Extra-Tropical Storm Surge

Freshwater Use and Withdrawals

During 2000, about 1,500 million gallons per day (Mgal/d) of freshwater was withdrawn from surface-water and Groundwater sources in Maryland for a variety of uses including public-supply distribution (PS), commercial (CO), self-supplied domestic (DO), industrial (IN), mining (MI), thermoelectric power generation (TE), livestock watering (LV), aquaculture (AQ), and irrigation (IR). Click here for more information.

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Real-Time Groundwater

Real-Time Groundwater Wells Click the sites to view real-time data.	USGS Groundwater Sites, 9-28-2010 Click the image to view a larger map.

Monthly Groundwater Levels

Current Groundwater information maps are listed by county, categorized by water table or confined aquifer, with 5 year information. This information is based on monthly readings from selected wells in the MD-DE-DC Water Science Center.

View Water-Table Wells or Confined Aquifer Wells..

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Chesapeake Bay

Chesapeake Bay, the Nation’s largest estuary, is monitored by the USGS. Click here for more information.

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Historical Water Data

National Water Conditions
Maps and animations of monthly streamflows

Surface-Water Data Retrieval (Daily streamflow and peak flows):

	Maryland		Delaware
	DC		Virginia

River Input Monitoring (Fall Line) stations

• Maryland - Susquehanna, Choptank, Patuxent, Potomac
• Virginia - Rappahannock, James, Pomunkey, Mattaponi, Appomattox

Surface Water Site Inventory

• What's new?
• Active continuous streamflow sites
• Discontinued continuous streamflow sites

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Weather and Climate Information

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Water Tools

CFS Calculator (Link opens a new window)
Convert values from cfs (cubic feet per second)

Real-Time Streamflow Regional Quick-Navigation

This feature allows the user to navigate through each real-time station in numerical sequence (Maryland and Delaware)

Click-through Graph Navigation

This feature allows the user to click through each real-time station, viewing only the latest streamflow charts (Maryland and Delaware)

Frequently Asked Questions

 

Water Watch

 

Webcams

 

Related Information

For an explanation of stream gaging, see:

• U.S. Geological Survey Circular 1123
  Stream-Gaging Program of the U.S. Geological Survey
  by K. L. Wahl, W. O. Thomas, Jr., and R. M. Hirsch.
• PowerPoint Presentation: Data collection at U.S. Geological Survey Streamgages
  HTML Format | PowerPoint File [13.4 mb]

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