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USGS Water-Quality Data for the Nation - National Water Information System (NWIS)

Published by U.S. Geological Survey | Department of the Interior | Metadata Last Checked: July 15, 2025 | Last Modified: 20201117
The USGS compiles online access to water-resources data collected 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.

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Alabama Alaska American Samoa Arizona Arkansas California Colorado Commonwealth of the Northern Mariana Islands Connecticut Delaware District of Columbia Florida Georgia Guam Hawaii Idaho Illinois Indiana Iowa Kansas Kentucky Louisiana Maine Maryland Massachusetts Michigan Minnesota Mississippi Missouri Montana NWIS National Water Information System Mapper National Water Information System: Mapper 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 USGS:283b1aa6-9268-4010-87da-45d496f63f90 United Staes Utah Vermont Virgin Islands Virginia Washington West Virginia Wisconsin Wyoming active water monitoring locations administrative and political boundaries agriculture and farming annual water data atmospheric and climate biology and ecology business and economic cadastral cultural, society, and demographic current water condition current water conditions daily drainage basin elevation and derived products facilities and structures field samples gaging stations geological and geophysical ground water ground-water groundwater groundwater data human health and diease hydrologic unit hydrology imagery and base maps inland waters lakes locations and geodetic networks oceans and estuaries real-time water data site information streamflow streams surface water surface-water data time-series data utilities and communication water data water flow unit water information water level water levels water quality water statistics water table water temperature water use water use data water web services water-quality data weekly

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