Somerset CountyPower Outage History
What this grade means
Average — typical outage frequency and duration nationally. This county sits in the middle of the national distribution — its outage frequency and duration over the past 12 years are close to the nationwide median, neither notably better nor worse than most other US counties. A typical amount of backup-power preparedness is reasonable here.
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Aug 4, 2020 | 147 hrs | 36,937 (21%) | Hurricane Isaias |
| Mar 6, 2018 | 163 hrs | 28,201 (16%) | High Wind |
| Jun 9, 2017 | <1 hr | 22,236 (13%) | Unnamed event |
| Aug 8, 2015 | 4 hrs | 19,918 (12%) | Unnamed event |
| Sep 22, 2021 | <1 hr | 19,161 (11%) | Unnamed event |
Was There an Outage on a Specific Date?
Pick a date to see whether a power outage was recorded for Somerset County, New Jersey that day.
Over the 12 years from 2014 to 2025, Somerset County recorded 2,071 distinct power outage events, averaging 2.2 hours per event.
The single worst outage on record in Somerset County started August 4, 2020 (Hurricane Isaias), lasting 147 hours and leaving up to 36,937 customers without power (21% of the county) at its peak.
July has historically been the worst month for outages in Somerset County, with 242 events recorded during that month across the dataset.
Based on this history, Somerset County earns a Reliability Grade of C, placing it in the 47th percentile nationally for grid reliability (higher percentile = more reliable).
Similar counties in New Jersey
Counties with the closest reliability grade and national percentile to Somerset County.
| County | Grade | National percentile |
|---|---|---|
| Camden County | C | 47th |
| Gloucester County | D | 39th |
| Passaic County | C | 56th |
| Salem County | D | 35th |
| Ocean County | D | 35th |
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 Somerset County?
Between 2014 and 2025, Somerset County recorded 2,071 outage events, averaging 2.2 hours each.
What is Somerset County's reliability grade?
Somerset County has a Reliability Grade of C, in the 47th national percentile.
What was the worst power outage in Somerset County?
The worst outage on record started August 4, 2020 (Hurricane Isaias), lasting 147 hours and affecting up to 36,937 customers.