Commonwealth Edison Co: power outages per year
In 2025 the average Commonwealth Edison Co customer was without power for 1.3 hours, less than the Illinois average of 2.4 h; down from 2.2 h in 2024. The utility served 4,194,773 customers in Illinois and ranks #2 of 2 large Illinois utilities by outage hours.
By year
| Year | Hours (with major events) | Hours (without) | Interruptions | Customers |
|---|---|---|---|---|
| 2025 | 1.3 | 0.6 | 0.7 | 4,194,773 |
| 2024 | 2.2 | 0.6 | 0.7 | 4,229,904 |
| 2023 | 1.6 | 0.6 | 0.6 | 4,210,328 |
| 2022 | 1.1 | 0.6 | 0.6 | 4,194,257 |
| 2021 | 1.7 | 0.7 | 0.8 | 4,175,582 |
| 2020 | 5.7 | 0.7 | 0.8 | 4,153,856 |
"With major events" includes storm days that utilities may exclude from their own reliability targets; it is what customers actually live through. The gap between the two columns shows how much of the year's outage time came from big storms.
Backup power for Commonwealth Edison Co outages
An average outage here lasted about 1.9 hours in 2025. Size backup for the longest outage you want to ride through, not the average.
Other large utilities in Illinois
FAQ
How many hours a year are Commonwealth Edison Co customers without power?
1.3 hours per customer in 2025 including major event days (0.6 h without them), as Commonwealth Edison Co reported to the U.S. EIA.
How long does a typical Commonwealth Edison Co outage last?
About 1.9 hours on average in 2025 (total outage minutes divided by the number of interruptions). Storms make single events much longer.
Source: U.S. EIA Form 861, Reliability file, 2020–2025. Data snapshot . Utilities ranked nationwide →