Whiskey is for drinking, water is for fighting over.
Mark Twain
When the well is dry, we know the worth of water.
Benjamin Franklin, 1746

Images from Yaak River Falls, © WaterSupply.Com
Current River and Stream Flows

The "Real-time streamflow" map tracks short-term changes (over several hours) in rivers and streams. Although the general appearance of the map changes very little from one hour to the next, individual sites may change rapidly in response to major rain events or to reservoir releases.

The map depicts streamflow conditions as computed at USGS streamgages. The colors represent real-time streamflow compared to percentiles of historical daily streamflow for the day of the year.

This map represents conditions relative to those that have historically occurred at this time of year. Only streamgages having at least 30 years of record are used.

States containing no dots indicate locations where flow data for the current day are temporarily unavailable. During winter months, some states (or parts of states) may have fewer dots than at other times of the year due to ice effects.

The data used to produce this map are provisional and have not been reviewed or edited. They may be subject to significant change.  

Real-time streamflow compared to historical streamflow for the day of the year
The map below is interactive. Click on a state for more detailed information.


Stream gage levels in The United States, relative to 30 year average. Florida Florida Florida Florida Florida Vermont Vermont New Hampshire New Hampshire Massachusetts Massachusetts Rhode Island Rhode Island Connecticut Connecticut New Jersey New Jersey Delaware Maryland District of Columbia Maryland Maryland Maryland West Virginia New York South Carolina Indiana Washington Idaho Montana Maine Oregon Minnesota North Dakota Michigan Wisconsin South Dakota Wyoming California Nevada Pennsylvania Iowa Utah Nebraska Ohio Illinois Colorado Virginia Missouri Kansas Kentucky Arizona North Carolina New Mexico Tennessee Oklahoma Texas Arkansas Georgia Alabama Mississippi Louisiana Alaska Hawaii Puerto Rico

[color code for] High
[color code for] > 90th percentile
[color code for] 75th - 89th percentile
[color code for] 25th - 74th percentile
[color code for] 10th - 24th percentile
[color code for] < 10th percentile
[color code for] Low
[color code for] Not ranked
The colored dots on this map depict streamflow conditions as a percentile, which is computed from the period of record for the current day of the year. Only stations with at least 30 years of record are used.
The gray circles indicate other stations that were not ranked in percentiles either because they have fewer than 30 years of record or because they report parameters other than streamflow. Some stations, for example, measure stage only.