Allegany County Power Outage History
2014–2025 · Maryland
Average — typical outage frequency and duration nationally. How grades are calculated
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Apr 20, 2025 | 83 hrs | 9,889 (27%) | Thunderstorm Wind |
| Mar 4, 2023 | 55 hrs | 7,687 (21%) | Winter Weather |
| Dec 14, 2023 | 2 hrs | 7,419 (20%) | Unnamed event |
| Aug 23, 2021 | 1 hrs | 6,919 (19%) | Unnamed event |
| Feb 12, 2019 | 78 hrs | 6,327 (17%) | Dense Fog |
Over the 12 years from 2014 to 2025, Allegany County recorded 697 distinct power outage events, averaging 3.5 hours per event.
The single worst outage on record in Allegany County started April 20, 2025 (Thunderstorm Wind), lasting 83 hours and leaving up to 9,889 customers without power (27% of the county) at its peak.
May has historically been the worst month for outages in Allegany County, with 72 events recorded during that month across the dataset.
Based on this history, Allegany County earns a Reliability Grade of C, placing it in the 43rd percentile nationally for grid reliability (higher percentile = more reliable).
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Similar counties in Maryland
Counties with the closest reliability grade and national percentile to Allegany County.
| County | Grade | National percentile |
|---|---|---|
| Carroll County | C | 49th |
| Cecil County | C | 51st |
| Harford County | C | 56th |
| Baltimore County | C | 58th |
| Garrett County | D | 27th |
FAQ
How often does power go out in Allegany County?
Between 2014 and 2025, Allegany County recorded 697 outage events, averaging 3.5 hours each.
What is Allegany County's reliability grade?
Allegany County has a Reliability Grade of C, in the 43rd national percentile.
What was the worst power outage in Allegany County?
The worst outage on record started April 20, 2025 (Thunderstorm Wind), lasting 83 hours and affecting up to 9,889 customers.