Power outages in Pennsylvania
In 2025, the average Pennsylvania customer had 7.6 hours (458.1 minutes) without power over the year. The US median in the data is 4.3 hours (258.7 minutes), so Pennsylvania was above it.
Trend
Outage time fell from 5.6 hours in 2020 to 3.3 hours in 2022, then rose each year to 7.6 hours in 2025. The worst year in the data is 2025, at 7.6 hours.
Utilities in 2025
The lowest SAIDI in 2025 was Borough of Chambersburg at 38.87 minutes (0.6 hours). The highest was Duquesne Light Co at 856.0 minutes (14.3 hours).
| Utility | Customers | Hours / yr | Interruptions |
|---|---|---|---|
| Duquesne Light Co | 617,922 | 14.3 | 1.3 |
| FirstEnergy Pennsylvania Electric Co | 2,084,958 | 10.8 | 2.0 |
| PECO Energy Co | 1,698,536 | 5.5 | 1.1 |
| PPL Electric Utilities Corp | 1,477,678 | 3.3 | 1.0 |
| UGI Utilities, Inc | 62,704 | 0.9 | 0.6 |
| Borough of Chambersburg - (PA) | 11,890 | 0.6 | 0.4 |
What this means for backup power
For everyday outages, enter 5.4 hours in the calculator, which is the average length of one interruption. To ride out a year like 2025, size for 7.6 hours, the total outage time that year.
FAQ
How long was the average power outage in Pennsylvania in 2025?
One interruption lasted 5.4 hours on average. Customers had about 1.408 interruptions in the year.
Is SAIDI the length of a single outage?
No. SAIDI is the total outage time per customer over a whole year. For Pennsylvania in 2025 that was 7.6 hours (458.1 minutes), spread over about 1.408 interruptions.
How many hours of backup power should I plan for?
For typical outages, use 5.4 hours in the calculator. If you want to cover a year as bad as 2025, plan for 7.6 hours in total.
Utility pages
Source: U.S. EIA Form 861 Reliability file. Data snapshot 2026-11-05.