Somerset County Power Outage History
2017–2025 · 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 |
|---|---|---|---|
| Dec 19, 2023 | 96 hrs | 27,638 (81%) | Flood |
| Dec 18, 2023 | 22 hrs | 26,442 (78%) | Winter Weather |
| Apr 9, 2020 | 124 hrs | 23,402 (69%) | Flood |
| Oct 30, 2017 | 131 hrs | 21,116 (62%) | Tropical Storm Phillipe |
| Nov 28, 2024 | 36 hrs | 14,427 (42%) | Winter Storm |
Over the 9 years from 2017 to 2025, Somerset County recorded 991 distinct power outage events, averaging 3.6 hours per event.
The single worst outage on record in Somerset County started December 19, 2023 (Flood), lasting 96 hours and leaving up to 27,638 customers without power (81% of the county) at its peak.
December has historically been the worst month for outages in Somerset County, with 119 events recorded during that month across the dataset.
Based on this history, Somerset County earns a Reliability Grade of F, placing it in the 3rd 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 Somerset County.
| County | Grade | National percentile |
|---|---|---|
| Oxford County | F | 2nd |
| Penobscot County | F | 3rd |
| Franklin County | F | 3rd |
| Sagadahoc County | F | 2nd |
| Waldo County | F | 2nd |
FAQ
How often does power go out in Somerset County?
Between 2017 and 2025, Somerset County recorded 991 outage events, averaging 3.6 hours each.
What is Somerset County's reliability grade?
Somerset County has a Reliability Grade of F, in the 3rd national percentile.
What was the worst power outage in Somerset County?
The worst outage on record started December 19, 2023 (Flood), lasting 96 hours and affecting up to 27,638 customers.