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Streamflow in the United States, 1940–2022

Published by U.S. EPA Office of Air and Radiation (OAR) - Office of Atmospheric Programs (OAP) | U.S. Environmental Protection Agency | Catalog Last Checked: August 03, 2026 at 04:43 AM | Dataset Last Updated: August 02, 2016 at 12:00 AM
This map shows percentage changes in the minimum annual rate of water carried by rivers and streams across the country, based on the long-term rate of change from 1940 to 2022. For more information: https://www.epa.gov/climate-indicators.

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