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.


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 2018, the PG&E SAIDI was about 126.3 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 2018, the PG&E SAIFI was about 1.079, 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 2018, the PG&E CAIDI was 117.0 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 2018, the PG&E MAIFI was 1.479 per customer.

Mesure reliability

SAIDI and SAIFI performance results


Along with electric reliability indices such as SAIDI, SAIFI, MAIFI and CAIDI, we track performance from year-to-year.


SAIDI performance results

 

SAIDI performance results

 

SAIFI performance results

 

SAIFI performance results

 

2018 Basic Cause - By Number of Sustained Distribution Outages

 

outage types