Union County Power Outage History
2014–2025 · New Jersey
Average — typical outage frequency and duration nationally. How grades are calculated
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Aug 4, 2020 | 152 hrs | 77,985 (30%) | Hurricane Isaias |
| Mar 7, 2018 | 123 hrs | 24,477 (9%) | High Wind |
| Jan 12, 2018 | 7 hrs | 22,493 (9%) | Unnamed event |
| Apr 4, 2018 | 0 hrs | 22,009 (8%) | Winter Weather |
| Jan 12, 2018 | 2 hrs | 19,507 (8%) | Unnamed event |
Over the 12 years from 2014 to 2025, Union County recorded 2,636 distinct power outage events, averaging 1.5 hours per event.
The single worst outage on record in Union County started August 4, 2020 (Hurricane Isaias), lasting 152 hours and leaving up to 77,985 customers without power (30% of the county) at its peak.
July has historically been the worst month for outages in Union County, with 333 events recorded during that month across the dataset.
Based on this history, Union County earns a Reliability Grade of C, placing it in the 60th percentile nationally for grid reliability (higher percentile = more reliable).
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Similar counties in New Jersey
Counties with the closest reliability grade and national percentile to Union County.
| County | Grade | National percentile |
|---|---|---|
| Bergen County | C | 59th |
| Mercer County | B | 62nd |
| Essex County | B | 63rd |
| Passaic County | C | 56th |
| Atlantic County | B | 67th |
FAQ
How often does power go out in Union County?
Between 2014 and 2025, Union County recorded 2,636 outage events, averaging 1.5 hours each.
What is Union County's reliability grade?
Union County has a Reliability Grade of C, in the 60th national percentile.
What was the worst power outage in Union County?
The worst outage on record started August 4, 2020 (Hurricane Isaias), lasting 152 hours and affecting up to 77,985 customers.