Union CountyPower Outage History
What this grade means
Worse than average — more frequent or longer outages than most counties. This county's recorded history shows more frequent outages and/or longer restoration times than most US counties over the same 12-year period. If you live here, it's worth taking backup power more seriously than an average household would.
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Sep 11, 2017 | 139 hrs | 5,785 (51%) | Hurricane Irma |
| Sep 27, 2024 | 93 hrs | 5,264 (46%) | Hurricane Helene |
| Aug 5, 2024 | 56 hrs | 3,827 (34%) | Hurricane Debby |
| Nov 3, 2018 | <1 hr | 3,437 (30%) | Unnamed event |
| Apr 24, 2020 | <1 hr | 3,363 (30%) | Unnamed event |
Was There an Outage on a Specific Date?
Pick a date to see whether a power outage was recorded for Union County, Florida that day.
Over the 12 years from 2014 to 2025, Union County recorded 460 distinct power outage events, averaging 2.6 hours per event.
The single worst outage on record in Union County started September 11, 2017 (Hurricane Irma), lasting 139 hours and leaving up to 5,785 customers without power (51% of the county) at its peak.
July has historically been the worst month for outages in Union County, with 81 events recorded during that month across the dataset.
Based on this history, Union County earns a Reliability Grade of D, placing it in the 32nd percentile nationally for grid reliability (higher percentile = more reliable).
Similar counties in Florida
Counties with the closest reliability grade and national percentile to Union County.
| County | Grade | National percentile |
|---|---|---|
| Monroe County | D | 32nd |
| St. Johns County | D | 33rd |
| Brevard County | D | 33rd |
| Clay County | D | 34th |
| Bradford County | D | 34th |
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 Union County?
Between 2014 and 2025, Union County recorded 460 outage events, averaging 2.6 hours each.
What is Union County's reliability grade?
Union County has a Reliability Grade of D, in the 32nd national percentile.
What was the worst power outage in Union County?
The worst outage on record started September 11, 2017 (Hurricane Irma), lasting 139 hours and affecting up to 5,785 customers.