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**Welcome to our homepage!** This site is your source for water-resources information collected and interpreted by        the U.S. Geological Survey representing Maryland, Delaware, and the District of Columbia.        
The water resources of Maryland, Delaware, and the District of Columbia consist of numerous streams, springs,          lakes, and aquifer systems. Streamflow, groundwater levels, and water-quality data are collected at numerous          locations, and water-use data are collected throughout the area. We also maintain and monitor a network of real-time data-collection sites throughout the region. These hydrologic data and other data are used          in research and hydrologic studies to describe the quantity, quality, and distribution of the area's water resources.          The collection, analysis, and interpretation of these data are done in partnership with other federal, state and           local agencies, universities, and research centers.        
News & Features:Eastern Shore Contributes Excess Nutrients into Chesapeake BayNew Study helps explain slow water-quality improvements to   management actionsMD Storm-Tide Sensor Network Improved The USGS is surveying locations throughout the state to expand the network of sensors to collect data about storms that threaten coastal communities Team Based Projects
The USGS MD-DE-DC Water Science Center is organized into work teams to bring together projects that investigate similar water-resources issues, encourage sharing of individual expertise, data-collection methods, and personnel. 

See what we're doing... 
>>Fate & Bioremediation>>Groundwater Studies>>National & Regional Assessments>>Surface Water Monitoring & Sediment Studies>>Water Quality Monitoring & Modeling USGS Water Science Center Seminars & Talks
Tuesday, April 21, 2015 at 11:00 a.m.     Judy Denver, Hydrologist, USGS

Water-quality response to conservation practices in two small agricultural watersheds on the Delmarva Peninsula

Upcoming and Past Seminars
Monthly Water Conditions 
>>February 2015: USGS MD-DE-DC Monthly Water Conditions Summary

>> Groundwater Levels >> Streamflow Statistics
 **>> SIR 2012-5185****Flux of Nitrogen, Phosphorus, and Suspended Sediment from the Susquehanna River Basin to the Chesapeake Bay during Tropical Storm Lee, September 2011, as an Indicator of the Effects of Reservoir Sedimentation on Water Quality** >> SIR 2013-1034**Flux of Nitrogen, Phosphorus, and Suspended Sediment from the Susquehanna River Basin to the Chesapeake Bay during Tropical Storm Lee, September 2011, as an Indicator of the Effects of Reservoir Sedimentation on Water Quality**>> SIR 2013-5082**Water Volume and Sediment Volume and Density in Lake Linganore between Boyers Mill Road Bridge and Bens Branch, Frederick County, Maryland, 2012** >> SIR 2013-5043**Statistical Classification of Hydrogeologic Regions in the Fractured Rock Area of Maryland and Parts of the District of Columbia, Virginia, West Virginia, Pennsylvania, and Delaware**Featured ProjectsMaryland's water supply comes from streams and rivers, groundwater, and reservoirs. In the Baltimore region and other metropolitan areas, the primary source of water is surface water (streams or reservoirs). Water regulators, planners, and policy makers need to know how much water can be withdrawn from wells and streams without causing adverse impacts.The National Water Quality Assessment (NAWQA) is a national program of the U.S. Geological Survey designed to provide consistent and reliable information on the quality of streams, groundwater, and aquatic ecology in the United States. Primary goals of the NAWQA program include determining the status of streams and groundwater, identifying changes over time, and understanding interacting natural and human influences on observed status and trends.The Chesapeake Bay, the Nation's largest estuary, has been degraded due to the impact of human-population increase, which has doubled since 1950, resulting in degraded water quality, loss of habitat, and declines in populations of biological communities. Since the mid-1980s, the Chesapeake Bay Program (CBP), a multi-agency partnership which includes the Department of Interior (DOI), has worked to restore the Bay ecosystem.   All USGSThis site onlyCURRENT CONDITIONSDATA CENTER- Surface Water  MD  DE  DC  
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REAL-TIME DATA- Streamflow  MD  DE  DC  
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Quick Link to Real-Time DataEnter a USGS site number:          
MORE WATER DATA- StreamStats:  MD  |  DE   
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U.S. Department of the Interior |		U.S. Geological Survey		URL: http://md.water.usgs.gov/index.html		Page Contact Information: [email protected]		Page Last Modified: 		 		Thursday, March 19, 2015