Knox 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 |
|---|---|---|---|
| Nov 2, 2014 | 52 hrs | 20,497 (71%) | Winter Storm |
| Mar 14, 2023 | 51 hrs | 16,556 (57%) | Winter Storm |
| Dec 26, 2025 | 3 hrs | 16,222 (56%) | Drought |
| Jul 24, 2023 | 2 hrs | 15,904 (55%) | Unnamed event |
| Oct 30, 2017 | 132 hrs | 14,527 (50%) | Tropical Storm Phillipe |
Was There an Outage on a Specific Date?
Pick a date to see whether a power outage was recorded for Knox County, Maine that day.
Over the 12 years from 2014 to 2025, Knox County recorded 970 distinct power outage events, averaging 3.1 hours per event.
The single worst outage on record in Knox County started November 2, 2014 (Winter Storm), lasting 52 hours and leaving up to 20,497 customers without power (71% of the county) at its peak.
November has historically been the worst month for outages in Knox County, with 108 events recorded during that month across the dataset.
Based on this history, Knox County earns a Reliability Grade of F, placing it in the 6th percentile nationally for grid reliability (higher percentile = more reliable).
Similar counties in Maine
Counties with the closest reliability grade and national percentile to Knox County.
| County | Grade | National percentile |
|---|---|---|
| York County | F | 6th |
| Kennebec County | F | 6th |
| Piscataquis County | F | 7th |
| Franklin County | F | 3rd |
| Penobscot 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 Knox County?
Between 2014 and 2025, Knox County recorded 970 outage events, averaging 3.1 hours each.
What is Knox County's reliability grade?
Knox County has a Reliability Grade of F, in the 6th national percentile.
What was the worst power outage in Knox County?
The worst outage on record started November 2, 2014 (Winter Storm), lasting 52 hours and affecting up to 20,497 customers.