We expect U.S. hydropower generation will increase by 7.5% in 2025 but will remain 2.4% below the 10-year average in our May Short-Term Energy Outlook (STEO). Hydropower generation in 2024 fell to 241 billion kilowatthours (BkWh), the lowest since at least 2010; in 2025, we expect generation will be 259.1 BkWh. This amount of generation would represent 6% of the electricity generation in the country.
About half of the hydropower generating capacity in the country is in the western states of Washington, Oregon, and California, so we closely monitor precipitation patterns in this region to inform our hydropower outlook.
Precipitation conditions have been mixed across the western United States since October. According to the WestWide Drought Tracker, more precipitation than normal has fallen in northern California, Oregon, and the eastern half of Washington state. Some areas in southeastern Oregon received record precipitation between October 2024 and April 2025. In contrast, precipitation was below normal in parts of Washington, Montana, Idaho, and Southern California.
Read more from the U.S. Energy Information Administration here.
The views and opinions expressed are those of the author’s and do not necessarily reflect the official policy or position of C3.
