The U.S. hydropower fleet has been providing clean, reliable power for more than a hundred years. However, no systematic documentation existed of the U.S. fleet and the trends influencing it in recent years. The Hydropower Market Report seeks to fill this gap and provide industry and policy makers with a quantitative baseline on the distribution, capabilities, and status of hydropower in the United States. Since 2014 there have been four complete editions of the report with the most recent edition focusing on updated data from 2020–2022. The report contextualizes information compared to evolving high-level trends over the past 10–20 years. In intervening years, updated summarizations and data are published on HydroSource .