Water Resources of the United States


National Water Information System (NWIS)

View current and historical streamflow, groundwater level, and water-quality data

Data Discovery

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Today's Water Conditions

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USGS Water Science Centers are located in each state

USGS In Your State (clickable)There is a USGS Water Science Center office in each State.
Washington Oregon California Idaho Nevada Montana Wyoming Utah Colorado Arizona New Mexico North Dakota South Dakota Nebraska Kansas Oklahoma Texas Minnesota Iowa Missouri Arkansas Louisiana Wisconsin Illinois Mississippi Michigan Indiana Ohio Kentucky Tennessee Alabama Pennsylvania West Virginia Georgia Florida Caribbean Alaska Hawaii New York Vermont New Hampshire Maine Massachusettes South Carolina North Carolina Rhode Island Virginia Connecticut New Jersey Maryland-Delaware-D.C.

USGS Flood Information

Past Flood Events | 2012 | Hurricane Isaac | Hurricane Sandy

USGS scientists, engineers, and technicians worked along the Gulf coast in response to Hurricane Isaac, deploying and maintaining storm tide sensors real-time streamgages in anticipation of Isaac's arrival. The USGS, in concert with our partners, is providing scientific assessments of the challenges wrought by Isaac.

USGS Open File Report: Monitoring Storm Tide and Flooding from Hurricane Isaac along the Gulf Coast of the United States, August 2012: a report prepared under a mission assignment with the Federal Emergency Management Agency detailing coastal area data collection by the USGS.

The data from the Hurricane Isaac storm-tide network constitute an extensive collection of continuous water-level records documenting a single, landfall hurricane. The data can be used to evaluate the performance of storm-tide models for maximum and incremental water level and flood extent and for site-specific effects of storm tide on natural and anthropogenic features of the environment.

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