| News updated Nov, 2011 |
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SYSTEM NOTICE: Friday, February 10, 2012, through Sunday February 12, 2012 there will be a planned power outage in one of our USGS facilities. This should not affect the availability of any data that we serve; however, the mapping interface which displays sites on a map will be unavailable. A follow-up notice will be sent when the power is fully restored. All real-time current data will continue to be available at http://waterdata.usgs.gov/nwis. |
About the National Water Information System: Web Interface
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During cold
weather, ice effects on stage, ground water levels, precipitation and
water quality parameters at some stream-gaging stations and wells are
likely. Data values reported on these pages may be significantly higher
or lower than actual values. Adjustment of data for ice effects can
only be done after detailed analysis. Users are encouraged to contact
this office for more information on specific stream-gaging stations or
wells.
The United States Geological Survey (USGS) has collected water-resources data at approximately 1.5 million sites in all 50 States, the District of Columbia, Puerto Rico, the Virgin Islands, Guam, American Samoa and the Commonwealth of the Northern Mariana Islands.
The types of data collected are varied, but generally fit into the broad categories of surface water and groundwater. Surface-water data, such as gage height (stage) and streamflow (discharge), are collected at major rivers, lakes, and reservoirs. Groundwater data, such as water level, are collected at wells and springs.
Water-quality data are available for both surface water and groundwater. 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, groundwater, 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.
The National Water Information System: Web Interface is a system that is based on several development efforts that were established in our water science centers. An Overview of Water Data for the Nation is available for further information.
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U.S. Department of the Interior |
U.S. Geological Survey
Title: About the USGS
URL: http://waterdata.usgs.gov/dc/nwis/about?
Page Contact Information: Dist. of Columbia Water Data Maintainer
Page Last Modified: 2012-02-09 19:53:25 EST
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