Cumberland 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 |
|---|---|---|---|
| Oct 30, 2017 | 132 hrs | 109,526 (48%) | Tropical Storm Phillipe |
| Apr 4, 2024 | 28 hrs | 105,529 (46%) | Winter Storm |
| Oct 30, 2017 | 0 hrs | 99,605 (44%) | Tropical Storm Phillipe |
| Oct 30, 2017 | 14 hrs | 93,009 (41%) | Tropical Storm Phillipe |
| Mar 23, 2024 | 58 hrs | 89,045 (39%) | Winter Storm |
Over the 12 years from 2014 to 2025, Cumberland County recorded 2,173 distinct power outage events, averaging 2.9 hours per event.
The single worst outage on record in Cumberland County started October 30, 2017 (Tropical Storm Phillipe), lasting 132 hours and leaving up to 109,526 customers without power (48% of the county) at its peak.
June has historically been the worst month for outages in Cumberland County, with 239 events recorded during that month across the dataset.
Based on this history, Cumberland County earns a Reliability Grade of F, placing it in the 12th percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Cumberland County's outage profile
See more picks in our Best Dual-Fuel Portable Generators for Power Outages roundup.
Champion Power Equipment 4375-Watt Dual Fuel RV Ready Portable Generator with Free 3-Year Warranty
Outage-prep kit
See our outage-prep guides.
Similar counties in Maine
Counties with the closest reliability grade and national percentile to Cumberland County.
| County | Grade | National percentile |
|---|---|---|
| Androscoggin County | F | 13th |
| Washington County | F | 14th |
| Piscataquis County | F | 7th |
| Kennebec County | F | 6th |
| Knox County | F | 6th |
FAQ
How often does power go out in Cumberland County?
Between 2014 and 2025, Cumberland County recorded 2,173 outage events, averaging 2.9 hours each.
What is Cumberland County's reliability grade?
Cumberland County has a Reliability Grade of F, in the 12th national percentile.
What was the worst power outage in Cumberland County?
The worst outage on record started October 30, 2017 (Tropical Storm Phillipe), lasting 132 hours and affecting up to 109,526 customers.