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Posted August 10, 2026Duration of power outages in Puerto Rico not caused by major events increased 19% in 2025 ›
Data values: Reliability—2025 Data Early Release
Note: The System Average Interruption Duration Index (SAIDI) shown here measures the total duration (in hours) of non-momentary power interruptions an average customer experiences in a one-year period. This metric distinguishes Major Event Days (MED), which is defined by the IEEE Standard 1366 as a day whenever the daily system exceeds a predefined threshold measured in minutes per day and based on data from the previous five years.
In 2025, customers in Puerto Rico experienced an average of 36 hours of power interruptions that were not caused by major events such as hurricanes, 19% more than in 2024. On average, between 2021 and 2025, Puerto Rican customers experience 29 hours of power loss each year. By comparison, electricity customers in the mainland United States generally experience about two hours of electricity interruptions per year without major events.
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