Alleghany CountyPower Outage History
What this grade means
Average — typical outage frequency and duration nationally. This county sits in the middle of the national distribution — its outage frequency and duration over the past 12 years are close to the nationwide median, neither notably better nor worse than most other US counties. A typical amount of backup-power preparedness is reasonable here.
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Jun 10, 2021 | <1 hr | 8,223 (38%) | Unnamed event |
| Sep 13, 2016 | 2 hrs | 5,385 (25%) | Unnamed event |
| Sep 27, 2024 | 13 hrs | 4,295 (20%) | Hurricane Helene |
| Sep 28, 2024 | 24 hrs | 4,089 (19%) | Hurricane Helene |
| Mar 2, 2023 | 2 hrs | 3,733 (17%) | Unnamed event |
Was There an Outage on a Specific Date?
Pick a date to see whether a power outage was recorded for Alleghany County, North Carolina that day.
Over the 11 years from 2015 to 2025, Alleghany County recorded 468 distinct power outage events, averaging 2.6 hours per event.
The single worst outage on record in Alleghany County started June 10, 2021, lasting less than 1 hour and leaving up to 8,223 customers without power (38% of the county) at its peak.
September has historically been the worst month for outages in Alleghany County, with 48 events recorded during that month across the dataset.
Based on this history, Alleghany County earns a Reliability Grade of C, placing it in the 57th percentile nationally for grid reliability (higher percentile = more reliable).
Similar counties in North Carolina
Counties with the closest reliability grade and national percentile to Alleghany County.
| County | Grade | National percentile |
|---|---|---|
| Martin County | C | 57th |
| Buncombe County | C | 56th |
| Cumberland County | C | 57th |
| Randolph County | C | 56th |
| Davidson County | C | 57th |
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 Alleghany County?
Between 2015 and 2025, Alleghany County recorded 468 outage events, averaging 2.6 hours each.
What is Alleghany County's reliability grade?
Alleghany County has a Reliability Grade of C, in the 57th national percentile.
What was the worst power outage in Alleghany County?
The worst outage on record started June 10, 2021, lasting less than 1 hour and affecting up to 8,223 customers.