Delaware County Power Outage History
2014–2025 · Pennsylvania
Worse than average — more frequent or longer 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 |
|---|---|---|---|
| Mar 2, 2018 | 81 hrs | 109,686 (40%) | Winter Storm |
| Jun 23, 2015 | 20 hrs | 107,229 (39%) | Heat |
| Jun 19, 2025 | 127 hrs | 74,815 (27%) | Thunderstorm Wind |
| Jun 24, 2015 | 23 hrs | 69,321 (25%) | Heat |
| Feb 16, 2025 | 73 hrs | 49,986 (18%) | Winter Weather |
Over the 12 years from 2014 to 2025, Delaware County recorded 3,696 distinct power outage events, averaging 2.0 hours per event.
The single worst outage on record in Delaware County started March 2, 2018 (Winter Storm), lasting 81 hours and leaving up to 109,686 customers without power (40% of the county) at its peak.
July has historically been the worst month for outages in Delaware County, with 428 events recorded during that month across the dataset.
Based on this history, Delaware County earns a Reliability Grade of D, placing it in the 32nd percentile nationally for grid reliability (higher percentile = more reliable).
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Similar counties in Pennsylvania
Counties with the closest reliability grade and national percentile to Delaware County.
| County | Grade | National percentile |
|---|---|---|
| Washington County | D | 31st |
| Crawford County | D | 31st |
| Bradford County | D | 33rd |
| Butler County | D | 34th |
| Potter County | D | 30th |
FAQ
How often does power go out in Delaware County?
Between 2014 and 2025, Delaware County recorded 3,696 outage events, averaging 2.0 hours each.
What is Delaware County's reliability grade?
Delaware County has a Reliability Grade of D, in the 32nd national percentile.
What was the worst power outage in Delaware County?
The worst outage on record started March 2, 2018 (Winter Storm), lasting 81 hours and affecting up to 109,686 customers.