Graphing Water Information System (GWIS)


February 2017


General public, partner agencies, floodplain managers, emergency managers

Base Data

USGS Water Data for the Nation


USGS Technical Announcement

Select Media

Data Science Central

Download GWIS

A new JavaScript library, called GWIS (Graphing Water Information System), can create time-series plots of information measured at U.S. Geological Survey hydrologic data collection sites across the US. Developed by the USGS Texas Water Science Center, the user-friendly interface integrates the open-source dygraphs JavaScript charting library with the hydrologic data provided by USGS water services.

Using GWIS, one or more interactive plots of any current or historical data available from the USGS Instantaneous (Real-Time) Service or Daily Value Service can easily be inserted into a web page. Plot appearance is customizable, and the plots feature interactive zooming, an interactive legend, and optional user controls such as full screen and y-axis log scaling. Multiple plot series, double y-axes and pop-up plots are also supported.

GWIS homepage

GWIS sample graph

GWIS javascript API