Cumberland CountyPower Outage History
What this grade means
Better than average — fewer or shorter outages than most counties. This county's outage history is better than the national median: recorded outages are less frequent and/or shorter in duration than a typical US county experienced over the same 12-year period. It isn't in the top tier nationally, but its track record points to lower-than-average outage risk.
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Aug 4, 2020 | 81 hrs | 23,295 (28%) | Tropical Storm Isaias |
| Mar 21, 2018 | 42 hrs | 15,350 (19%) | Winter Storm |
| Jul 31, 2016 | 2 hrs | 9,735 (12%) | Heavy Rain |
| Jun 23, 2015 | 19 hrs | 6,749 (8%) | Heat |
| Jan 9, 2024 | 65 hrs | 6,706 (8%) | High Wind |
Was There an Outage on a Specific Date?
Pick a date to see whether a power outage was recorded for Cumberland County, New Jersey that day.
Over the 12 years from 2014 to 2025, Cumberland County recorded 630 distinct power outage events, averaging 2.2 hours per event.
The single worst outage on record in Cumberland County started August 4, 2020 (Tropical Storm Isaias), lasting 81 hours and leaving up to 23,295 customers without power (28% of the county) at its peak.
July has historically been the worst month for outages in Cumberland County, with 80 events recorded during that month across the dataset.
Based on this history, Cumberland County earns a Reliability Grade of B, placing it in the 71st percentile nationally for grid reliability (higher percentile = more reliable).
Similar counties in New Jersey
Counties with the closest reliability grade and national percentile to Cumberland County.
| County | Grade | National percentile |
|---|---|---|
| Middlesex County | B | 69th |
| Atlantic County | B | 67th |
| Essex County | B | 63rd |
| Mercer County | B | 62nd |
| Union County | C | 60th |
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 Cumberland County?
Between 2014 and 2025, Cumberland County recorded 630 outage events, averaging 2.2 hours each.
What is Cumberland County's reliability grade?
Cumberland County has a Reliability Grade of B, in the 71st national percentile.
What was the worst power outage in Cumberland County?
The worst outage on record started August 4, 2020 (Tropical Storm Isaias), lasting 81 hours and affecting up to 23,295 customers.