St. Thomas CountyPower Outage History
What this grade means
Bottom 20% least reliable nationally — frequent and/or long outages. This county ranks in the least reliable fifth of all US counties in our dataset: some combination of frequent outages, long restoration times, or customers affected puts it near the bottom nationally. Backup power is worth prioritizing here rather than treating it as optional.
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Dec 15, 2020 | 6 hrs | 22,647 (100%) | Unnamed event |
| May 4, 2020 | 16 hrs | 22,631 (100%) | Unnamed event |
| Jun 18, 2021 | 12 hrs | 22,620 (100%) | Unnamed event |
| Jan 11, 2021 | 9 hrs | 22,564 (99%) | Unnamed event |
| Jan 9, 2021 | 4 hrs | 22,558 (99%) | Unnamed event |
Was There an Outage on a Specific Date?
Pick a date to see whether a power outage was recorded for St. Thomas County, United States Virgin Islands that day.
Over the 7 years from 2019 to 2025, St. Thomas County recorded 1,372 distinct power outage events, averaging 2.6 hours per event.
The single worst outage on record in St. Thomas County started December 15, 2020, lasting 6 hours and leaving up to 22,647 customers without power (100% of the county) at its peak.
June has historically been the worst month for outages in St. Thomas County, with 172 events recorded during that month across the dataset.
Based on this history, St. Thomas County earns a Reliability Grade of F, placing it in the 2nd percentile nationally for grid reliability (higher percentile = more reliable).
Similar counties in United States Virgin Islands
Counties with the closest reliability grade and national percentile to St. Thomas County.
| County | Grade | National percentile |
|---|---|---|
| St. Croix County | F | 3rd |
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 St. Thomas County?
Between 2019 and 2025, St. Thomas County recorded 1,372 outage events, averaging 2.6 hours each.
What is St. Thomas County's reliability grade?
St. Thomas County has a Reliability Grade of F, in the 2nd national percentile.
What was the worst power outage in St. Thomas County?
The worst outage on record started December 15, 2020, lasting 6 hours and affecting up to 22,647 customers.