Water Resources of the United States


National Water Information System (NWIS)

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

Data Discovery

For more data options, explore our data discovery tools.

Today's Water Conditions

View maps of current and historical conditions

Click map to go to current water resources conditions in the U.S.

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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

Use WaterWatch to track flooding in your area

The USGS WaterWatch website is a map-based tool that displays maps, graphs, and tables describing real-time, recent, and past streamflow conditions for the United States. This page shows how to use WaterWatch to view up-to-the-hour flood stage conditions at specific sites across the United States.

The image below shows an example of a WaterWatch Flood map from April of 2011. Users visiting the WaterWatch Flood site can find local flood information by following three simple steps:

  1. Click on a State to zoom in to a map of streamgages for that State.
  2. Click on a triangle representing a streamgage that is currently in flood stage.
  3. Click the "Peak" tab to see information about how the current flood stage compares to previous floods.

Click anywhere in the image below to go to the WaterWatch Flood site and try it out:

diagram showing steps for using WaterWatch to find local data

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URL: http://water.usgs.gov/floods/current/HowToWW/
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Page Last Modified: Monday, 24-Feb-2014 13:51:44 EST