Sullivan CountyPower Outage History
2014–2025 · Pennsylvania
Bottom 20% least reliable nationally — frequent and/or long outages. This county ranks in the least reliable fifth of all US counties in our dataset: some combination of frequent outages, long restoration times, or customers affected puts it near the bottom nationally. Backup power is worth prioritizing here rather than treating it as optional.
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Apr 15, 2019 | 45 hrs | 3,396 (96%) | Tornado |
| Aug 14, 2018 | 39 hrs | 3,394 (96%) | Flash Flood |
| May 2, 2017 | 88 hrs | 3,379 (95%) | Thunderstorm Wind |
| Jan 8, 2015 | 14 hrs | 3,303 (93%) | Unnamed event |
| Apr 22, 2015 | 3 hrs | 3,284 (93%) | Unnamed event |
Over the 12 years from 2014 to 2025, Sullivan County recorded 642 distinct power outage events, averaging 5.0 hours per event.
The single worst outage on record in Sullivan County started April 15, 2019 (Tornado), lasting 45 hours and leaving up to 3,396 customers without power (96% of the county) at its peak.
July has historically been the worst month for outages in Sullivan County, with 76 events recorded during that month across the dataset.
Based on this history, Sullivan County earns a Reliability Grade of F, placing it in the 2nd percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Sullivan County's outage profile
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Read our mission →Similar counties in Pennsylvania
Counties with the closest reliability grade and national percentile to Sullivan County.
| County | Grade | National percentile |
|---|---|---|
| Wayne County | F | 5th |
| Forest County | F | 5th |
| Pike County | F | 7th |
| Susquehanna County | F | 7th |
| Monroe County | F | 14th |
Most reliable counties in Pennsylvania
The top 3 counties in Pennsylvania by reliability grade and percentile.
| County | Grade | National percentile |
|---|---|---|
| Union County | A | 86th |
| Dauphin County | A | 84th |
| Philadelphia County | A | 83rd |
Least reliable counties in Pennsylvania
The bottom 3 counties in Pennsylvania by reliability grade and percentile.
| County | Grade | National percentile |
|---|---|---|
| Sullivan County | F | 2nd |
| Wayne County | F | 5th |
| Forest County | F | 5th |
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 Sullivan County?
Between 2014 and 2025, Sullivan County recorded 642 outage events, averaging 5.0 hours each.
What is Sullivan County's reliability grade?
Sullivan County has a Reliability Grade of F, in the 2nd national percentile.
What was the worst power outage in Sullivan County?
The worst outage on record started April 15, 2019 (Tornado), lasting 45 hours and affecting up to 3,396 customers.