Northern States Power Co: power outages per year
In 2025 the average Northern States Power Co customer was without power for 5.1 hours, more than the Wisconsin average of 3.8 h; up from 3.5 h in 2024. The utility served 263,161 customers in Wisconsin and ranks #2 of 5 large Wisconsin utilities by outage hours.
By year
| Year | Hours (with major events) | Hours (without) | Interruptions | Customers |
|---|---|---|---|---|
| 2025 | 5.1 | 1.8 | 1.1 | 263,161 |
| 2024 | 3.5 | 2.0 | 1.1 | 260,234 |
| 2023 | 2.9 | 1.4 | 0.9 | 257,561 |
| 2022 | 6.9 | 1.9 | 1.4 | 255,504 |
| 2021 | 4.0 | 1.4 | 1.1 | 253,056 |
| 2020 | 2.1 | 1.6 | 0.9 | 250,648 |
"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 Northern States Power Co outages
An average outage here lasted about 4.5 hours in 2025. Size backup for the longest outage you want to ride through, not the average.
Other large utilities in Wisconsin
FAQ
How many hours a year are Northern States Power Co customers without power?
5.1 hours per customer in 2025 including major event days (1.8 h without them), as Northern States Power Co reported to the U.S. EIA.
How long does a typical Northern States Power Co outage last?
About 4.5 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 →