View Our Reliability Reports

Annual Reliability Report and Public Meeting

SCE submits an annual Electric System Reliability Report to the California Public Utilities Commission (CPUC).

The company also conducts an annual public meeting to present high-level information about the Annual Report. Below is the event information regarding the meeting to discuss the 2017 Annual Report:

Tuesday, Dec. 4, 2018
6 p.m.
Southern California Edison Energy Education Center
Irwindale Sustainability Center
6090 N. Irwindale Ave, Irwindale 91702
2017 reliability presentation

Live stream of event >

All the annual reports are available on the CPUC website here. See below for the most recent version of our annual report.

2017 SCE Annual Electric System Reliability Report
(Please note that the report for the current year will not be available until the following July of next year.)

Video Replay of Nov. 27, 2017 event (2016 reliability presentation)

How Reliability is Measured

As your electric utility, we want you to always have power when you need it. To get there, we constantly track and monitor electric outages across our service territory, and we measure our “system reliability” from this data.

The two metrics we rely on are common in the electric utility industry: the System Average Interruption Duration Index (SAIDI) and the System Average Interruption Frequency Index (SAIFI).

  • SAIDI measures the amount of time the average SCE customer experienced a power outage or interruption for more than five minutes (called a “sustained outage”) in a given year. In 2016, our SAIDI was about 110 minutes per customer (with Major Event Days excluded).
  • SAIFI is the number of times the average SCE customer experienced a sustained outage in a given year. In 2016, our SAIFI was 0.99 (with Major Event Days excluded), or less than one per customer.
SAIDI equals Minutes without power divided by number of customers
SAIFI equals all sustained outages divided by number of customers

City/County Reliability Reports

The 2017 reliability reports for each city and county in SCE’s service territory are available below. If you would like to view the reliability report for your area, choose your county, then select your city name or unincorporated county district number. For additional reliability information about the electric circuit that serves your home or business, please contact us at CircuitReliability@sce.com.