Hydropower share of Idaho electricity generation
45.7%
Hydroelectric share of net generation in Idaho, 2024
−1.3 pts since 2023 (47.0%); −10.4 pts since 2019 (56.1%); −13.6 pts since 2014 (59.3%)
Source: U.S. Energy Information Administration, Net Generation by State by Type of Producer by Energy Source (EIA-906/920/923). Data period 2024. Published September 18, 2025. Retrieved September 8, 2026.
What the number tells us
Hydroelectric share of net generation in Idaho: 45.7% in 2024. Conventional hydroelectric net generation as a percentage of Idaho's total net generation from all sources, for a calendar year. Computed by the puller, not published directly by EIA.
Historical data
Source: U.S. Energy Information Administration, Net Generation by State by Type of Producer by Energy Source (EIA-906/920/923). Published September 18, 2025. Retrieved September 8, 2026.
Data table (35 rows)
| Period | Idaho (percent) |
|---|---|
| 1990 | 94.1% |
| 1991 | 92.8% |
| 1992 | 89.2% |
| 1993 | 92.2% |
| 1994 | 90.7% |
| 1995 | 92.8% |
| 1996 | 94.3% |
| 1997 | 94.1% |
| 1998 | 93.0% |
| 1999 | 93.5% |
| 2000 | 92.1% |
| 2001 | 77.3% |
| 2002 | 89.6% |
| 2003 | 80.2% |
| 2004 | 77.9% |
| 2005 | 78.9% |
| 2006 | 84.0% |
| 2007 | 78.6% |
| 2008 | 78.2% |
| 2009 | 79.6% |
| 2010 | 76.1% |
| 2011 | 80.9% |
| 2012 | 70.6% |
| 2013 | 55.8% |
| 2014 | 59.3% |
| 2015 | 55.9% |
| 2016 | 57.7% |
| 2017 | 61.3% |
| 2018 | 60.7% |
| 2019 | 56.1% |
| 2020 | 53.8% |
| 2021 | 47.5% |
| 2022 | 51.4% |
| 2023 | 47.0% |
| 2024 | 45.7% |
Source
- Organization
- U.S. Energy Information Administration
- Dataset
- Net Generation by State by Type of Producer by Energy Source (EIA-906/920/923)
- Geography
- Nation and states (including DC); 50 states, DC and the nation are all carried since the file already covers every state
- Time coverage
- 1990-2024
- Update frequency
- Annual
- Published
- September 18, 2025
- Retrieved
- September 8, 2026
- Original file
- https://www.eia.gov/electricity/data/state/annual_generation_state.xls
- Methodology
- https://www.eia.gov/electricity/data/state/
- License
- Public domain. U.S. federal government work.
- Our copy
- eia-generation, built by
scripts/fetch-eia-generation.py
Caveats
- Generation figures are net of plant use (station power), not gross generation.
- The source file publishes megawatthours; every value here is that figure divided by 1000 to store gigawatthours, with no further rounding.
- energy.net_generation and energy.net_generation_by_source cover 'Total Electric Power Industry' (all producer types: electric utilities, independent power producers and combined heat and power), not any single provider type.
- energy.net_generation_by_source omits a source for a year when EIA collected no generation for it that year; the source does not publish an explicit zero row, so the set of categories present is not the same every year.
- energy.hydro_share is not published by EIA; it is computed here as Hydroelectric Conventional generation divided by total net generation, times 100, rounded to one decimal place, and excludes pumped storage, which EIA reports as a separate energy source.
- Hydroelectric output varies year to year with the water year (snowpack and runoff), so year-over-year changes in net generation and hydro_share reflect hydrology as much as demand or capacity.
- All years through 2024 are EIA-final; the workbook's own sheet is named 'Net_Generation_1990-2024 Final' and nothing here is marked preliminary.
Data
Download the full dataset behind this page as CSV or JSON, or browse the data catalog. Cite this page as Understand Idaho, “Hydropower share of Idaho electricity generation”, https://understandidaho.com/energy/hydropower/, retrieved on the date you read it.