US Electricity Customers Averaged Five and One-Half Hours of Power Interruptions in 2022: EIA
On average, U.S. electricity customers experienced approximately five and one-half hours of electricity interruptions in 2022, almost two hours less than in 2021, according to our recently released Annual Electric Power Industry Report. The annual decline was driven by fewer major events in 2022 compared with 2021.
Since 2013, the average duration of electricity interruptions each year has remained consistently around two hours after excluding major events. Major events that cause power interruptions include weather, interference from vegetation near power lines, and utility practices. We measure U.S. electric utility reliability using two indexes:
- The System Average Interruption Duration Index (SAIDI) measures the total duration (in hours) an average customer experiences non-momentary power interruptions in a one-year period.
- The System Average Interruption Frequency Index (SAIFI) measures the frequency of interruptions in number of occurrences.
We measure the impact these major events have on electricity reliability by comparing the SAIDI and SAIFI values of the affected states with the U.S. average (5.6 hours of outages and 1.4 outages per customer). In 2022, the United States had 18 weather-related disasters…


