The Oklahoma Corporation Commission has released its 2026 Regulated Electric Utilities Reliability Scorecard, a listing of how well utilities in the state performed for their customers over the past year. It includes the average number of power outages per utility and the length of time that customers had to go without electrical power.
The report includes reliability data from five electric utilities regulated by this Commission:
• Arkansas Valley Electric Cooperative Corp. (“Arkansas Valley”)
• Empire District Electric Co. (“Empire”)
• Northeast Oklahoma Electric Cooperative, Inc. (“NOEC” or Northeast Oklahoma)
• Oklahoma Gas and Electric Co. (“OG&E”)
• Public Service Company of Oklahoma (“PSO”)
The Reliability Scorecard was created in accordance with the Electric Utility Rules of the agency and includes an evaluation of the reliability of regulated electric. The card is based on the System Average Interruption Frequency Index (SAIFI) and the System Average Interruption Duration Index or SAIDI.
• SAIFI reflects the average number of sustained interruptions (lasting five minutes or more) experienced by a customer annually. It is calculated as the total number of sustained interruptions divided by the total number of customers.
• SAIDI measures the average duration of interruptions per customer annually and is calculated by dividing the total duration of sustained interruptions by the total number of customers (total duration of sustained interruptions in a year / total number of customers). This report expresses SAIDI in customer-minutes.
For calendar year 2025, the average Oklahoma customer experienced approximately 1.267
outages (SAIFI), with an average total outage duration of 121.02 minutes or 2.02 hours (SAIDI).
Empire customers experienced an average of 1.34 power outages or interruptions in 2025. Northeast Oklahoma customers were without power on average 1.38 times last year. The customers of OG&E and PSO, the state’s largest electric companies, were without power in 2025 for an average of 1.07 and 1.16 times, respectively. Overall, during 2025, Oklahoma electric customers served by a regulated utility were without power on average, approximately 1.24 times. The five-year average SAIFI across all regulated utilities was 1.221, with OG&E customers experiencing the fewest outages (1.006 average) and NOEC customers the most (1.568 average).
Of Oklahoma’s five electricity providers regulated by the Commission that are included in this
report, OG&E customers averaged the most time without power in 2025, that being 145.07
minutes, or 2.10 hours. Arkansas Valley had the second most time without power at 138.0
minutes, or 2.30 hours. Empire customers were without power for the shortest time in 2025, an
average of 102.15 minutes. NOEC and PSO customers were without power for an average of
114.44 and 105.45 minutes, respectively, during 2025. Altogether, customers of Oklahoma’s
regulated electric utilities were without power for an average of 128.23 minutes last year.
Over the past five years, OG&E and Arkansas Valley customers, on average, were without
power the longest, while Empire customers averaged the least amount of power outage time
during the period.
An inspection of the data reveals that PSO and OG&E over the past five years experienced
relatively slight changes in the duration of outages; suggesting service was more consistent
during that period than the service of the other three regulated electric utilities in the State.
Differences in the length of outages were principally due to irregular or locally variable weather,
although company-specific factors, such as the availability of linemen to restore power more
quickly, also affected the length of power losses.
The results cited above show that some of Oklahoma’s regulated electric utilities have succeeded
in improving their service reliability and reducing the number and duration of power outages.
While some utilities have more work to do to achieve higher levels of reliability, all utilities must
continue efforts to minimize the frequency and duration of power outages. The OCC report said the agency is
committed to working with each regulated utility to try to facilitate improvements in delivery of
safe and reliable electricity in a way that minimizes costs to ratepayers while ensuring quality
service
