Anne Arundel County Power Outage History
2014–2025 · Maryland
Better than average — fewer or shorter outages than most counties. How grades are calculated
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Jun 1, 2023 | 8 hrs | 46,003 (18%) | Unnamed event |
| Apr 25, 2019 | 1 hrs | 37,786 (14%) | Unnamed event |
| Jan 3, 2022 | 56 hrs | 34,497 (13%) | Winter Storm |
| Jun 19, 2025 | 47 hrs | 33,137 (13%) | Tornado |
| Mar 3, 2018 | 7 hrs | 32,361 (12%) | Dense Fog |
Over the 12 years from 2014 to 2025, Anne Arundel County recorded 2,446 distinct power outage events, averaging 2.2 hours per event.
The single worst outage on record in Anne Arundel County started June 1, 2023, lasting 8 hours and leaving up to 46,003 customers without power (18% of the county) at its peak.
July has historically been the worst month for outages in Anne Arundel County, with 374 events recorded during that month across the dataset.
Based on this history, Anne Arundel County earns a Reliability Grade of B, placing it in the 69th percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Anne Arundel County's outage profile
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Outage-prep kit
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Similar counties in Maryland
Counties with the closest reliability grade and national percentile to Anne Arundel County.
| County | Grade | National percentile |
|---|---|---|
| Worcester County | B | 67th |
| Montgomery County | B | 71st |
| Prince George's County | B | 67th |
| Washington County | B | 72nd |
| Baltimore County | B | 65th |
FAQ
How often does power go out in Anne Arundel County?
Between 2014 and 2025, Anne Arundel County recorded 2,446 outage events, averaging 2.2 hours each.
What is Anne Arundel County's reliability grade?
Anne Arundel County has a Reliability Grade of B, in the 69th national percentile.
What was the worst power outage in Anne Arundel County?
The worst outage on record started June 1, 2023, lasting 8 hours and affecting up to 46,003 customers.