Knox County Power Outage History
2014–2025 · Maine
Bottom 20% least reliable nationally — frequent and/or long outages. How grades are calculated
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 |
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).
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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 |
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.