Jefferson CountyPower Outage History
What this grade means
Worse than average — more frequent or longer outages than most counties. This county's recorded history shows more frequent outages and/or longer restoration times than most US counties over the same 12-year period. If you live here, it's worth taking backup power more seriously than an average household would.
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Apr 1, 2023 | 46 hrs | 10,971 (46%) | Thunderstorm Wind |
| Mar 16, 2025 | 49 hrs | 9,180 (39%) | Thunderstorm Wind |
| Apr 29, 2025 | 90 hrs | 7,160 (30%) | Thunderstorm Wind |
| Jul 13, 2021 | 5 hrs | 6,833 (29%) | Thunderstorm Wind |
| Apr 2, 2018 | 2 hrs | 6,198 (26%) | Unnamed event |
Was There an Outage on a Specific Date?
Pick a date to see whether a power outage was recorded for Jefferson County, Pennsylvania that day.
Over the 12 years from 2014 to 2025, Jefferson County recorded 763 distinct power outage events, averaging 3.6 hours per event.
The single worst outage on record in Jefferson County started April 1, 2023 (Thunderstorm Wind), lasting 46 hours and leaving up to 10,971 customers without power (46% of the county) at its peak.
June has historically been the worst month for outages in Jefferson County, with 115 events recorded during that month across the dataset.
Based on this history, Jefferson County earns a Reliability Grade of D, placing it in the 28th percentile nationally for grid reliability (higher percentile = more reliable).
Similar counties in Pennsylvania
Counties with the closest reliability grade and national percentile to Jefferson County.
| County | Grade | National percentile |
|---|---|---|
| Montgomery County | D | 28th |
| McKean County | D | 27th |
| Warren County | D | 28th |
| Columbia County | D | 27th |
| Clarion County | D | 29th |
Most reliable counties nationally
The top 3 counties nationally by reliability grade and percentile.
| County | State | Grade | National percentile |
|---|---|---|---|
| Clay County | South Dakota | A | 100th |
| Clearwater County | Minnesota | A | 99th |
| Limestone County | Alabama | A | 99th |
Least reliable counties nationally
The bottom 3 counties nationally by reliability grade and percentile.
| County | State | Grade | National percentile |
|---|---|---|---|
| Clay County | West Virginia | F | 0th |
| Lincoln County | West Virginia | F | 0th |
| Cameron Parish | Louisiana | F | 0th |
FAQ
How often does power go out in Jefferson County?
Between 2014 and 2025, Jefferson County recorded 763 outage events, averaging 3.6 hours each.
What is Jefferson County's reliability grade?
Jefferson County has a Reliability Grade of D, in the 28th national percentile.
What was the worst power outage in Jefferson County?
The worst outage on record started April 1, 2023 (Thunderstorm Wind), lasting 46 hours and affecting up to 10,971 customers.