Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock () or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Discover and download images and data visualizations that support the National and Regional Water Availability Assessments.
This model computes the amount of water withdrawn for public supply each month over the period from 2000 to 2020 for all subwatersheds (12-digit Hydrologic Unit Codes or HUC12s) in the conterminous United States (CONUS).
This model computes the amount of water withdrawn for public supply each month over the period from 2000 to 2020 for all subwatersheds (12-digit Hydrologic Unit Codes or HUC12s) in the conterminous United States (CONUS).
This model computes the amount of water withdrawn and consumed by thermoelectric power plants each month over the period from 2008 to 2020 for all subwatersheds (12-digit Hydrologic Unit Codes or HUC12s) in the conterminous United Sta
This model computes the amount of water withdrawn and consumed by thermoelectric power plants each month over the period from 2008 to 2020 for all subwatersheds (12-digit Hydrologic Unit Codes or HUC12s) in the conterminous United Sta
This model computes the amount of crop irrigation withdrawals each month over the period from 2000 to 2020 for all subwatersheds (12-digit Hydrologic Unit Codes or HUC12s) in the conterminous United States (CONUS).
This model computes the amount of crop irrigation withdrawals each month over the period from 2000 to 2020 for all subwatersheds (12-digit Hydrologic Unit Codes or HUC12s) in the conterminous United States (CONUS).
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.
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.
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 the Delaware River Basin, created using TopoRivBlender. Read more about this method at https://waterdata.usgs.gov/blog/topo-riv-blender/
3D render of the Delaware River Basin, created using TopoRivBlender. Read more about this method at https://waterdata.usgs.gov/blog/topo-riv-blender/
3D render of Willamette River Basin, created using TopoRivBlender. Read more about this method at https://waterdata.usgs.gov/blog/topo-riv-blender/
3D render of Willamette River Basin, created using TopoRivBlender. Read more about this method at https://waterdata.usgs.gov/blog/topo-riv-blender/
3D render of Trinity-San Jacinto, created using TopoRivBlender. Read more about this method at https://waterdata.usgs.gov/blog/topo-riv-blender/
3D render of Trinity-San Jacinto, created using TopoRivBlender. Read more about this method at https://waterdata.usgs.gov/blog/topo-riv-blender/
3D render of Upper Colorado River Basin, created using TopoRivBlender. Read more about this method at https://waterdata.usgs.gov/blog/topo-riv-blender/
3D render of Upper Colorado River Basin, created using TopoRivBlender. Read more about this method at https://waterdata.usgs.gov/blog/topo-riv-blender/
3D render of the Illinois River Basin, created using TopoRivBlender. Read more about this method at https://waterdata.usgs.gov/blog/topo-riv-blender/
3D render of the Illinois River Basin, created using TopoRivBlender. Read more about this method at https://waterdata.usgs.gov/blog/topo-riv-blender/
Map of the Upper Colorado River Basin —referred to as an Integrated Water Science (IWS) basins—are intensively monitored study basins representing a wide range of environmental, hydrologic, and landscape settings and human stressors of water resources to improve our understanding of water availability across the Nation.
Map of the Upper Colorado River Basin —referred to as an Integrated Water Science (IWS) basins—are intensively monitored study basins representing a wide range of environmental, hydrologic, and landscape settings and human stressors of water resources to improve our understanding of water availability across the Nation.
Water availability in the Klamath Basin is shaped by three interconnected factors, like overlapping circles in a Venn diagram. First, upper basin controls—such as groundwater, snowpack, and runoff—determine how much water is available. Second, biological opinions set flow requirements to protect endangered fish and habitats, including flushing and geomorphic flows.
Water availability in the Klamath Basin is shaped by three interconnected factors, like overlapping circles in a Venn diagram. First, upper basin controls—such as groundwater, snowpack, and runoff—determine how much water is available. Second, biological opinions set flow requirements to protect endangered fish and habitats, including flushing and geomorphic flows.
Hydrologic regions and aggregated hydrologic regions used in the National Water Availability Assessment report in the conterminous United States, Alaska, Hawaii, Puerto Rico, and the U.S. Virgin Islands. Published in https://doi.org/10.3133/pp1894A
Hydrologic regions and aggregated hydrologic regions used in the National Water Availability Assessment report in the conterminous United States, Alaska, Hawaii, Puerto Rico, and the U.S. Virgin Islands. Published in https://doi.org/10.3133/pp1894A
The U.S. Geological Survey uses a depiction and classification scheme for hydrologic units known as hydrologic unit codes (HUCs). HUCs generally represent catchments, and river basins are represented by a unique series of numbers with successively smaller hydrologic units nested inside of larger ones.
The U.S. Geological Survey uses a depiction and classification scheme for hydrologic units known as hydrologic unit codes (HUCs). HUCs generally represent catchments, and river basins are represented by a unique series of numbers with successively smaller hydrologic units nested inside of larger ones.
A stacked bar chart showing the sources of Nitrogen across hydrologic regions of CONUS (2010-2020). Colors show the total Nitrogen load contributed from agriculture, atmospheric deposition, natural sources, wastewater, and other human sources.
A stacked bar chart showing the sources of Nitrogen across hydrologic regions of CONUS (2010-2020). Colors show the total Nitrogen load contributed from agriculture, atmospheric deposition, natural sources, wastewater, and other human sources.
Water limitation across the lower 48. Water limitation is measured as the Supply and Use Index (SUI) which represents the imbalance between water supply and demand. A higher SUI indicates a greater proportion of supply being used.
Water limitation across the lower 48. Water limitation is measured as the Supply and Use Index (SUI) which represents the imbalance between water supply and demand. A higher SUI indicates a greater proportion of supply being used.
A simplified drinking water aquifer map of CONUS. Overlapping aquifers are indicated with striping.
A simplified drinking water aquifer map of CONUS. Overlapping aquifers are indicated with striping.
Surface water supply and demand across hydrologic regions (2010-2020). Surface water supply is shown as average surface runoff, and demand reflects consumptive use.
Surface water supply and demand across hydrologic regions (2010-2020). Surface water supply is shown as average surface runoff, and demand reflects consumptive use.
Total water use for the top 3 water use categories: thermoelectric power generation, public supply, and crop irrigation. These three categories make up 90% of all water use in the contiguous United States.
Total water use for the top 3 water use categories: thermoelectric power generation, public supply, and crop irrigation. These three categories make up 90% of all water use in the contiguous United States.
Total water use for the top 3 water use categories: thermoelectric power generation, public supply, and crop irrigation. These three categories make up 90% of all water use in the contiguous United States.
Total water use for the top 3 water use categories: thermoelectric power generation, public supply, and crop irrigation. These three categories make up 90% of all water use in the contiguous United States.
In the lower 48 states, nearly 5,000 billion gallons of water fall in the form of precipitation each day. Most of that water re-enters the atmosphere through evapotranspiration, and about a quarter of our daily water input ends up as streamflow to the Atlantic and Pacific Oceans, Canada or the Gulf of Mexico.
In the lower 48 states, nearly 5,000 billion gallons of water fall in the form of precipitation each day. Most of that water re-enters the atmosphere through evapotranspiration, and about a quarter of our daily water input ends up as streamflow to the Atlantic and Pacific Oceans, Canada or the Gulf of Mexico.