Grand Isle CountyPower Outage History
2014–2025 · Vermont
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 |
|---|---|---|---|
| Mar 24, 2021 | <1 hr | 3,099 (100%) | Unnamed event |
| Feb 22, 2021 | <1 hr | 3,093 (100%) | Winter Weather |
| Oct 30, 2018 | 2 hrs | 3,040 (98%) | Unnamed event |
| Jun 27, 2015 | 2 hrs | 2,963 (96%) | Unnamed event |
| Aug 9, 2024 | 41 hrs | 2,865 (92%) | Hurricane Debby |
Over the 12 years from 2014 to 2025, Grand Isle County recorded 704 distinct power outage events, averaging 2.3 hours per event.
The single worst outage on record in Grand Isle County started March 24, 2021, lasting less than 1 hour and leaving up to 3,099 customers without power (100% of the county) at its peak.
November has historically been the worst month for outages in Grand Isle County, with 130 events recorded during that month across the dataset.
Based on this history, Grand Isle County earns a Reliability Grade of D, placing it in the 38th percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Grand Isle County's outage profile
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Read our mission →Similar counties in Vermont
Counties with the closest reliability grade and national percentile to Grand Isle County.
| County | Grade | National percentile |
|---|---|---|
| Lamoille County | C | 41st |
| Caledonia County | D | 35th |
| Franklin County | C | 42nd |
| Bennington County | D | 28th |
| Washington County | D | 27th |
Most reliable counties in Vermont
The top 3 counties in Vermont by reliability grade and percentile.
| County | Grade | National percentile |
|---|---|---|
| Chittenden County | B | 66th |
| Franklin County | C | 42nd |
| Lamoille County | C | 41st |
Least reliable counties in Vermont
The bottom 3 counties in Vermont by reliability grade and percentile.
| County | Grade | National percentile |
|---|---|---|
| Windham County | F | 2nd |
| Orange County | F | 7th |
| Essex County | F | 9th |
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 Grand Isle County?
Between 2014 and 2025, Grand Isle County recorded 704 outage events, averaging 2.3 hours each.
What is Grand Isle County's reliability grade?
Grand Isle County has a Reliability Grade of D, in the 38th national percentile.
What was the worst power outage in Grand Isle County?
The worst outage on record started March 24, 2021, lasting less than 1 hour and affecting up to 3,099 customers.