About NWISWeb
The United States Geological Survey (USGS) has collected water-resources data at approximately 1.5 million sites across the United States, Puerto Rico, and Guam.
The types of data collected are varied, but generally fit into the broad categories of surface water and ground water. Surface-water data, such as gage height (stage) and streamflow (discharge), are collected at major rivers, lakes, and reservoirs. Ground-water data, such as water level, are collected at wells and springs.
Water-quality data are available for both surface water and ground water. Examples of water-quality data collected are temperature, specific conductance, pH, nutrients, pesticides, and volatile organic compounds.
This web site serves current and historical data. Data are retrieved by category of data, such as surface water, ground water, or water quality, and by geographic area. Subsequent pages allow further refinement by selecting specific information and by defining the output desired.
Not all water-resources data collected by the USGS are provided on this web page. To inquire about the availability of additional hydrologic data, as well as other USGS information such as reports, visit the USGS Water Resources Home Page at http://water.usgs.gov.
NWISWeb system is a new system that was based on the effort/development from several other USGS water related web systems: the national system for historic streamflow data (NWIS-W) , and the real-time streamflow data system; and several development efforts that were established in our districts. An overview of NWISWeb is available for further information.
| Questions about data | Water Webserver Team | Top |
| Feedback on this website | NWISWeb Support Team | Explanation of terms |