Electric Reliability Reports

Access the latest data about your area

PG&E is proud to be your utility company. As your energy provider, we’re responsible for providing you with safe, reliable power. To measure our reliability, we constantly track and monitor outages across our service area. Then, we calculate our reliability rates based on this data.

PG&E Electric Reliability Annual Report and Virtual Town Hall

Each year, we compile a report that reviews our electric reliability status with both a system-wide and division-level perspective. The report is submitted to the California Public Utilities Commission (CPUC) and is available to the public. The report on 2021 electric reliability was submitted in 2022.

Here are some helpful links:

Understand how we measure reliability

We apply four metrics typically used in the electric utility industry:

System Average Interruption Duration Index (SAIDI). This index is based on the amount of time the average PG&E customer experiences a sustained outage (being without power for more than five minutes) in a given year. In 2021, the PG&E SAIDI was about 218.2 minutes per customer.
System Average Interruption Frequency Index (SAIFI). This metric represents the number of times the average PG&E customer experiences a sustained outage in a given year. In 2021, the PG&E SAIFI was about 1.318, or slightly more than one per customer.
Customer Average Interruption Duration Index (CAIDI). This index represents the average restoration time when customers are impacted by a sustained outage. It is determined by dividing SAIDI by SAIFI. In 2021, the PG&E CAIDI was 165.5 minutes.
Momentary Average Interruption Frequency Index (MAIFI). This index is based on the number of times the average customer is interrupted by Momentary Outage events each year. Momentary Outage events are outages that last 5 minutes or less. In 2021, the PG&E MAIFI was 1.320 per customer.

Mesure reliability