Cumberland 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 |
|---|---|---|---|
| Oct 30, 2017 | 132 hrs | 109,526 (48%) | Tropical Storm Phillipe |
| Apr 4, 2024 | 28 hrs | 105,529 (46%) | Winter Storm |
| Oct 30, 2017 | <1 hr | 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 |
Was There an Outage on a Specific Date?
Pick a date to see whether a power outage was recorded for Cumberland County, Maine that day.
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).
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 |
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 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.