Middlesex 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 | 139 hrs | 100,804 (25%) | Hurricane Isaias |
| Jul 25, 2016 | 6 hrs | 50,123 (12%) | Thunderstorm Wind |
| Mar 7, 2018 | 120 hrs | 26,861 (7%) | High Wind |
| Jul 23, 2019 | 32 hrs | 23,376 (6%) | Hurricane Barry |
| Aug 13, 2016 | 5 hrs | 22,450 (6%) | Unnamed event |
Was There an Outage on a Specific Date?
Pick a date to see whether a power outage was recorded for Middlesex County, New Jersey that day.
Over the 12 years from 2014 to 2025, Middlesex County recorded 3,686 distinct power outage events, averaging 1.5 hours per event.
The single worst outage on record in Middlesex County started August 4, 2020 (Hurricane Isaias), lasting 139 hours and leaving up to 100,804 customers without power (25% of the county) at its peak.
July has historically been the worst month for outages in Middlesex County, with 403 events recorded during that month across the dataset.
Based on this history, Middlesex County earns a Reliability Grade of B, placing it in the 69th percentile nationally for grid reliability (higher percentile = more reliable).
Similar counties in New Jersey
Counties with the closest reliability grade and national percentile to Middlesex County.
| County | Grade | National percentile |
|---|---|---|
| Cumberland County | B | 71st |
| 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 Middlesex County?
Between 2014 and 2025, Middlesex County recorded 3,686 outage events, averaging 1.5 hours each.
What is Middlesex County's reliability grade?
Middlesex County has a Reliability Grade of B, in the 69th national percentile.
What was the worst power outage in Middlesex County?
The worst outage on record started August 4, 2020 (Hurricane Isaias), lasting 139 hours and affecting up to 100,804 customers.