About Water Availability Assessments
About Water Availability Assessments
Water availability refers to how much water is physically accessible (water quantity) and whether that water is safe to use (water quality). The differences in water quantity and quality across the landscape, and how they change through time, determine whether there is enough water for human and ecosystem needs.
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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.
Understanding Water Availability
The United States faces growing challenges to its water supply, and we need to know where there is not enough water, where we have more than we need, and the quality of the water. The USGS is charged with understanding and reporting on water availability including influences on water supply (how much water and of what quality) and water demand (how much water do humans and ecosystems need).