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Discover and download images, data visualizations, and videos that support the National and Regional Water Availability Assessments.

Images

Images that represent downloading integrated water data
National Water Availability Assessment Data Companion capabilities
National Water Availability Assessment Data Companion capabilities
National Water Availability Assessment Data Companion capabilities

Images representing three of the services available to users of the National Water Availability Assessments (NWAA) Data Companion. Services include subset and download tool, data file directory, and web services. 

Surface water supply and use index, as a fraction, across the United States
Surface water supply and use index from National Water Availability Assessment Data Companion
Surface water supply and use index from National Water Availability Assessment Data Companion
Surface water supply and use index from National Water Availability Assessment Data Companion

The surface water supply and use index (SUI) expresses the fraction of the median long-term water supply at a HUC12 that is unavailable either because of climatic variability (e.g. an unusually dry year) or because the water is used consumptively for crop irrigation, thermoelectric power, or public supply.

The surface water supply and use index (SUI) expresses the fraction of the median long-term water supply at a HUC12 that is unavailable either because of climatic variability (e.g. an unusually dry year) or because the water is used consumptively for crop irrigation, thermoelectric power, or public supply.

3D render of Upper Colorado River Basin
3D render of Upper Colorado River Basin
3D render of Upper Colorado River Basin
3D render of Illinois River Basin
3D render of Illinois River Basin
3D render of Illinois River Basin
3D render of Illinois River Basin

3D render of the Illinois River Basin, created using TopoRivBlender. Read more about this method at https://waterdata.usgs.gov/blog/topo-riv-blender/ 

Videos

National water availability assessment data companion webinar opening slide National water availability assessment data companion webinar opening slide
New Modeled Water Data: Data Companion Release January 2026
New Modeled Water Data: Data Companion Release January 2026

This recorded webinar demonstrates how to access and use new modeled water data delivered through the National Water Availability Assessment Data Companion (NWDC). The NWDC is a centralized website providing USGS model-derived water availability, supply, and use information that underlies the National Water Availability Assessment Report.

This recorded webinar demonstrates how to access and use new modeled water data delivered through the National Water Availability Assessment Data Companion (NWDC). The NWDC is a centralized website providing USGS model-derived water availability, supply, and use information that underlies the National Water Availability Assessment Report.

Thumbnail for the National Water Availability Assessment Release Thumbnail for the National Water Availability Assessment Release
National Water Availability Assessment Release
National Water Availability Assessment Release

This recorded webinar details the significance and finding of the National Water Availability Assessment Release. 

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