Integrated Water Availability Assessments | U.S. Geological Survey
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New data available on the National Water Availability Assessment Data Companion
The Data Companion has been updated to include more modeled water datasets and new features.
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National Water Availability Assessment: Key Findings
Explore the Report's top scientific findings through engaging stories, plain-language explanations, and interactive data visualizations.
Explore the Key Findings Interactive Website
National Water Availability Assessment Report
Providing synthesis and interpretation of water availability in the past, present, and future
Read the Report
Regional Water Availability Assessments
Focused scientific assessments of water availability in different hydrologic regions across the Nation
Explore our current regional basin studies
Integrated Water Availability Assessments
National Water Availability Assessments
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Integrated Water Availability Assessments
The USGS Water Resources Mission Area is assessing how much water is available for human and ecological needs in the United States and identifying where and when the Nation may have challenges meeting its demand for water.
Learn more about Integrated Water Availability Assessments
National Water Availability Assessment: Key Findings
Explore the Key Findings
National Water Availability Assessment Report
Read the Report
National Water Availability Assessment Data Companion
Access the Data Companion
Elevated geogenic contaminants common in drinking water aquifers across the U.S.
February 9, 2026
Elevated geogenic contaminants common in drinking water aquifers across the U.S.
USGS releases a comprehensive look at water resources in the United States
January 16, 2025
USGS releases a comprehensive look at water resources in the United States
El USGS selecciona la Cuenca del Río Trinity-San Jacinto para estudiar los impactos del cambio climático y la variabilidad del nivel del mar
February 24, 2023
El USGS selecciona la Cuenca del Río Trinity-San Jacinto para estudiar los impactos del cambio climático y la variabilidad del nivel del mar
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April 4, 2026
Long-term monotonic trends in water budget components in the contiguous United States: Insights from two hydrologic models
Long-term monotonic trends in water budget components in the contiguous United States: Insights from two hydrologic models
Characterizing changes to water availability for domestic, industrial, agricultural, and other uses is essential to support water management. To better quantify these changes, the U.S. Geological Survey and National Science Foundation National Center for Atmospheric Research produced two hydrologic models simulating water budget components from 1980 to 2021 over the contiguous United...
Authors
Phillip J. Goodling, Sydney Foks, Jessica Ayers
By
Water Resources Mission Area
Integrated Water Availability Assessments
January 15, 2025
Integrated water availability in the conterminous United States, 2010–20
Integrated water availability in the conterminous United States, 2010–20
Water availability is defined as the spatial and temporal distribution of water quantity and quality as it relates to the needs of humans and ecosystems. Broad assessment of water availability requires the consideration of multiple indicators because water users have different sensitivities to the degradation of water conditions. This chapter draws upon estimates of water supply, water...
Authors
Edward G. Stets, Matthew J. Cashman, Olivia L. Miller, Kathryn Powlen
By
Water Resources Mission Area
Integrated Water Availability Assessments
January 15, 2025
Water use across the conterminous United States, water years 2010–20
Water use across the conterminous United States, water years 2010–20
Withdrawals of water for human use are fundamental to the evaluation of the Nation’s water availability. This chapter provides an analysis of public supply, crop irrigation, and thermoelectric power water use for the conterminous United States (CONUS) during water years 2010–20. These three categories account for about 90 percent of water withdrawals in the Nation. The values presented...
Authors
Laura Medalie, Amy E. Galanter, Anthony J. Martinez, Althea A. Archer, Carol L. Luukkonen, Melissa A. Harris, Jonathan V. Haynes
By
Water Resources Mission Area
Integrated Water Availability Assessments
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July 30, 2025
Integrating water availability in the Klamath Basin: from drought to dam removal
The USGS Water Resources Mission Area is assessing how much water is available for human and ecological needs in the United States and identifying where and when the Nation may have challenges meeting its demand for water. This information helps decision makers manage and distribute water in ways that balance competing needs. Due to its complex and competing water demands, ecological significance...
By
Water Resources Mission Area
Oregon Water Science Center
Integrated Water Availability Assessments
Integrating water availability in the Klamath Basin: from drought to dam removal
July 30, 2025
Integrating water availability in the Klamath Basin: from drought to dam removal
The USGS Water Resources Mission Area is assessing how much water is available for human and ecological needs in the United States and identifying where and when the Nation may have challenges meeting its demand for water. This information helps decision makers manage and distribute water in ways that balance competing needs. Due to its complex and competing water demands, ecological significance...
January 16, 2025
Integrated Water Availability Assessments Fundamentals
The USGS Water Resources Mission Area is assessing how much water is available for human and ecological needs in the United States and identifying where and when the Nation may have challenges meeting its demand for water.
By
Water Resources Mission Area
Integrated Water Availability Assessments
Integrated Water Availability Assessments Fundamentals
January 16, 2025
Integrated Water Availability Assessments Fundamentals
The USGS Water Resources Mission Area is assessing how much water is available for human and ecological needs in the United States and identifying where and when the Nation may have challenges meeting its demand for water.
January 15, 2025
National Water Availability Assessment: Key Findings
This interactive website highlights the top scientific findings of the National Water Availability Assessment report through engaging stories, plain-language explanations, and interactive data visualizations.
By
Integrated Water Availability Assessments
National Water Availability Assessment: Key Findings
January 15, 2025
National Water Availability Assessment: Key Findings
This interactive website highlights the top scientific findings of the National Water Availability Assessment report through engaging stories, plain-language explanations, and interactive data visualizations.
View All
National water availability assessment data companion webinar opening slide
New Modeled Water Data: Data Companion Release January 2026
National Water Availability Assessment Data Companion capabilities
National Water Availability Assessment Data Companion capabilities
3D render of Delaware River Basin
3D render of Delaware River Basin
3D render of the Willamette River Basin
3D render of the Willamette River Basin
3D render of Trinity-San Jacinto River Basin
3D render of Trinity-San Jacinto 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
Map of Upper Colorado River Basin - Integrated Water Availability
Map of Upper Colorado River Basin - Integrated Water Availability
Integrated Water Science in the Klamath River Basin, Diagram
Integrated Water Science in the Klamath River Basin, Diagram
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