USGS National Water Availability Assessment

The USGS National Water Availability Assessment is a comprehensive, integrated scientific assessment of water availability in the U.S. The assessment uses state-of-the-art models to fill in the data gaps between water monitoring stations, and improved integration of water quantity, quality, and use allows water resource managers and decision makers to assess water availability more comprehensively.

USGS held a briefing about the release of the following data companion on January 13, 2026.