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The USGS Water Resources Mission Area provides water information that is fundamental to national and local economic well-being, protection of life and property, and effective management of the Nation’s water resources. Below, find data and tools relevant to a wide range of water resources and conditions including streamflow, groundwater, water quality, and water use and availability.

Water Data for the Nation

USGS New Real Time Date Pages Mobile Version

Access water data collected at approximately 1.9 million sites.

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Water Quality Portal

Screenshot of the Water Quality Portal

Water quality data from state, federal, tribal, and local agencies.

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Frequently Used Data and Tools

Filter Total Items: 97

Principal Aquifers of the United States Principal Aquifers of the United States

A principal aquifer is defined as a regionally extensive aquifer or aquifer system that has the potential to be used as a source of potable water. This site provides downloadable maps (Ground Water Atlas of the United States, 2003) and spatial data (National Atlas, 2014) for the principal aquifers and aquifers of alluvial and glacial origin of the U.S.
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Water Resources Mission Area, Groundwater and Streamflow Information Program, Upper Midwest Water Science Center, Water Science School

National Water Information System (NWIS) Mapper National Water Information System (NWIS) Mapper

The National Water Information System (NWIS) Mapper provides access to over 1.5 million sites contained in USGS Water Data for the Nation, including sites where current and historical surface-water, groundwater, springs, and atmospheric data has been collected. Users can search by site type, data type, site number, or place.
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Water Resources Mission Area, Central Midwest Water Science Center, Colorado Water Science Center, Dakota Water Science Center, Maryland-Delaware-D.C. Water Science Center, New England Water Science Center, New Jersey Water Science Center, New Mexico Water Science Center, New York Water Science Center, South Atlantic Water Science Center (SAWSC), Upper Midwest Water Science Center, National Water Quality Laboratory

Water Quality Portal Water Quality Portal

The Water Quality Portal integrates and provides access to publicly available water-quality data from databases such as USGS NWIS and BioData, EPA STORET, and USDA-ARS STEWARDS through a single search interface.
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Water Resources Mission Area, Idaho Water Science Center, New Jersey Water Science Center, New York Water Science Center, Upper Midwest Water Science Center

National Ground-Water Monitoring Network (NGWMN) Data Portal National Ground-Water Monitoring Network (NGWMN) Data Portal

The NGWMN Data Portal provides access to groundwater data from multiple, dispersed databases in a web-based mapping application. The Portal contains current and historical data including water levels, water quality, lithology, and well construction.
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Water Resources Mission Area, New York Water Science Center, Upper Midwest Water Science Center, Water Science School

Maps and GIS Data Maps and GIS Data

Explore water resources maps and GIS data.
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Water Resources Mission Area, Water Science School

StreamStats Application StreamStats Application

StreamStats provides access to spatial analytical tools that are useful for water-resources planning and management, and for engineering and design purposes. The map-based user interface can be used to delineate drainage areas, get basin characteristics and estimates of flow statistics, and more. Available information varies from state to state.
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Water Resources Mission Area, Idaho Water Science Center, New England Water Science Center, New Jersey Water Science Center, New Mexico Water Science Center, New York Water Science Center, Oregon Water Science Center, Pacific Islands Water Science Center, Pennsylvania Water Science Center, South Atlantic Water Science Center (SAWSC), Upper Midwest Water Science Center, Wyoming-Montana Water Science Center

Annual Water Data Reports Annual Water Data Reports

Annual Water Data Reports were published annually for many decades as static archival products that supplemented direct access to current and historical water data provided by the National Water Information System (NWIS). This site helps users access historical Water Data Reports, electronic Site Data Sheets, or current on-demand, print-ready Water-Year Summaries.
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Water Resources Mission Area, Upper Midwest Water Science Center, Washington Water Science Center

Dissolved Solids Sources, Loads, and Yields For the Conterminous U.S. Dissolved Solids Sources, Loads, and Yields For the Conterminous U.S.

Using the SPARROW (SPAtially-Referenced Regression on Watershed Attributes) model, long-term mean annual conditions for dissolved-solids sources, loads, and yields were predicted for nearly 66,000 stream reaches and their corresponding incremental catchments that drain the Nation.
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Water Resources Mission Area, Upper Midwest Water Science Center

Flood Inundation Mapper Flood Inundation Mapper

USGS Flood Inundation Maps, along with Internet information regarding current stage from the USGS streamgage, provide emergency management personnel and residents with information that is critical for flood-response activities, such as evacuations and road closures, as well as for post-flood recovery efforts.
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Water Resources Mission Area, Idaho Water Science Center, New Jersey Water Science Center, Oregon Water Science Center, Upper Midwest Water Science Center, Hurricane Laura, Hurricanes, Water Science School

Endangered, Discontinued, and Rescued Streamgages Mapper Endangered, Discontinued, and Rescued Streamgages Mapper

This mapper identifies USGS streamgages that are in danger of being discontinued or converted to a reduced level of service due to lack of funding, gages that already have been discontinued, and gages that have been ‘rescued’ by a new funding source.
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Water Resources Mission Area, Idaho Water Science Center, New York Water Science Center, Upper Midwest Water Science Center, Water Science School

National Environmental Methods Index (NEMI) National Environmental Methods Index (NEMI)

NEMI is a searchable database of environmental methods, protocols, statistical and analytical methods, and procedures that allows scientists and managers to find and compare methods for all stages of the monitoring process.
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Water Resources Mission Area, Upper Midwest Water Science Center

Estimated Annual Agricultural Pesticide Use Estimated Annual Agricultural Pesticide Use

View the geographic distribution of Estimated Annual Agricultural Pesticide Use in the conterminous United States. A graph accompanies each map, which shows annual national use by major crop for the mapped pesticide for each year during the period.
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Water Resources Mission Area, Upper Midwest Water Science Center
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