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.
||MD 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