Lancaster County Power Outage History
2014–2025 · Pennsylvania
Better than average — fewer or shorter outages than most counties. How grades are calculated
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Sep 7, 2023 | 10 hrs | 21,188 (10%) | Thunderstorm Wind |
| Dec 19, 2025 | 42 hrs | 13,222 (6%) | Winter Weather |
| Oct 29, 2015 | 2 hrs | 12,716 (6%) | Thunderstorm Wind |
| Nov 6, 2025 | 24 hrs | 12,023 (6%) | Thunderstorm Wind |
| Apr 22, 2023 | 9 hrs | 11,593 (6%) | Thunderstorm Wind |
Over the 12 years from 2014 to 2025, Lancaster County recorded 2,135 distinct power outage events, averaging 2.0 hours per event.
The single worst outage on record in Lancaster County started September 7, 2023 (Thunderstorm Wind), lasting 10 hours and leaving up to 21,188 customers without power (10% of the county) at its peak.
July has historically been the worst month for outages in Lancaster County, with 218 events recorded during that month across the dataset.
Based on this history, Lancaster County earns a Reliability Grade of B, placing it in the 80th percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Lancaster County's outage profile
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Outage-prep kit
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Similar counties in Pennsylvania
Counties with the closest reliability grade and national percentile to Lancaster County.
| County | Grade | National percentile |
|---|---|---|
| Luzerne County | B | 77th |
| Franklin County | A | 82nd |
| Philadelphia County | A | 83rd |
| Dauphin County | A | 84th |
| Cumberland County | B | 75th |
FAQ
How often does power go out in Lancaster County?
Between 2014 and 2025, Lancaster County recorded 2,135 outage events, averaging 2.0 hours each.
What is Lancaster County's reliability grade?
Lancaster County has a Reliability Grade of B, in the 80th national percentile.
What was the worst power outage in Lancaster County?
The worst outage on record started September 7, 2023 (Thunderstorm Wind), lasting 10 hours and affecting up to 21,188 customers.