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USGS Water Resources		Data Category: Home Real-time Site Information Surface Water Ground Water Water Quality	Geographic Area: United States Alabama Alaska American Samoa Arizona Arkansas California Colorado Connecticut Delaware Dist. of Columbia Florida Georgia Guam Hawaii Idaho Illinois Indiana Iowa Kansas Kentucky Louisiana Maine Maryland Massachusetts Michigan Minnesota Mississippi Missouri Montana Nebraska Nevada New Hampshire New Jersey New Mexico New York North Carolina North Dakota Northern Mariana Islands Ohio Oklahoma Oregon Pennsylvania Puerto Rico Rhode Island South Carolina South Dakota Tennessee Texas Utah Vermont Virgin Islands Virginia Washington West Virginia Wisconsin Wyoming

About NWISWeb

All Data Times In MD-DE-DC Are Eastern Standard Time

About USGS Water Data

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.

About this web site

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.

Specifications of our National System

• Web Server
  • operating system is the Sun Solaris [tm]
  • 4 Processors running at 480 Mgz
  • Pages served by the Apache web server
  • Perl and CGI is used to display all pages
  • Graphics are created by Gnuplot and we are licensed to create GIF images from Unisys
• Database Server
  • Operating system is the Redhat Linux
  • 8 Processors running at 600 Mgz
  • MySQL is used to run our database
• Connectivity
  • 1 Ghz Fiber connection between the web server and the database server