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Frequently Asked Questions (FAQs)

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Does EIA have information on unplanned outages or shutdowns of U.S. energy infrastructure?

The U.S. Energy Information Administration (EIA) offers the following resources and reports that include information related to unplanned outages or shutdowns of U.S. energy infrastructure.

EIA also publishes data on three metrics of the reliability of annual electricity service in the United States related to non-momentary electricity service interruptions experienced by customers of electricity distribution utilities:

  • System Average Interruption Frequency Index (SAIFI), which is the number of service interruptions the average customer experienced.
  • System Average Interruption Duration Index (SAIDI), which is the number of minutes of interruptions that the average customer experienced.
  • Customer Average Interruption Duration Index (CAIDI), which is the average number of minutes it takes to restore service from electricity service interruptions.

Utility-level data are published in the Reliability file of the Annual Electric Power Industry Report, Form EIA-861 data files. The data are aggregated to the national level and to state levels in the Electric Power Annual, Chapter 11: Distribution System Reliability.

For near real-time information on the effects of major weather-related events on U.S. energy infrastructure, visit the U.S. Department of Energy’s Emergency Response website and its Storm Hub and Hurricane Hub pages.

Learn more:
Several EIA products show what’s happening in current energy markets
U.S. electricity customers experienced eight hours of power interruptions in 2020
Today in Energy articles on energy disruptions and outages.

Last updated: August 14, 2023.

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