Sussex CountyPower Outage History
What this grade means
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 |
|---|---|---|---|
| Aug 9, 2022 | 8 hrs | 44,821 (63%) | Unnamed event |
| Dec 2, 2019 | 119 hrs | 39,284 (56%) | Winter Storm |
| Aug 4, 2020 | 129 hrs | 29,186 (41%) | Tropical Storm Isaias |
| Aug 11, 2016 | 15 hrs | 28,731 (41%) | Unnamed event |
| Mar 2, 2018 | 82 hrs | 26,925 (38%) | Winter Weather |
Was There an Outage on a Specific Date?
Pick a date to see whether a power outage was recorded for Sussex County, New Jersey that day.
Over the 11 years from 2015 to 2025, Sussex County recorded 1,691 distinct power outage events, averaging 3.2 hours per event.
The single worst outage on record in Sussex County started August 9, 2022, lasting 8 hours and leaving up to 44,821 customers without power (63% of the county) at its peak.
August has historically been the worst month for outages in Sussex County, with 204 events recorded during that month across the dataset.
Based on this history, Sussex County earns a Reliability Grade of F, placing it in the 6th percentile nationally for grid reliability (higher percentile = more reliable).
Similar counties in New Jersey
Counties with the closest reliability grade and national percentile to Sussex County.
| County | Grade | National percentile |
|---|---|---|
| Hunterdon County | F | 8th |
| Morris County | F | 13th |
| Warren County | F | 13th |
| Monmouth County | D | 26th |
| Burlington County | D | 32nd |
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 Sussex County?
Between 2015 and 2025, Sussex County recorded 1,691 outage events, averaging 3.2 hours each.
What is Sussex County's reliability grade?
Sussex County has a Reliability Grade of F, in the 6th national percentile.
What was the worst power outage in Sussex County?
The worst outage on record started August 9, 2022, lasting 8 hours and affecting up to 44,821 customers.