Washington 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 |
|---|---|---|---|
| Apr 20, 2025 | 94 hrs | 21,000 (29%) | Thunderstorm Wind |
| Jun 21, 2021 | 32 hrs | 7,558 (11%) | Thunderstorm Wind |
| Sep 7, 2023 | 23 hrs | 5,119 (7%) | Thunderstorm Wind |
| Jul 31, 2025 | 19 hrs | 5,019 (7%) | Thunderstorm Wind |
| Jul 10, 2018 | 2 hrs | 4,999 (7%) | Heat |
Over the 12 years from 2014 to 2025, Washington County recorded 649 distinct power outage events, averaging 2.6 hours per event.
The single worst outage on record in Washington County started April 20, 2025 (Thunderstorm Wind), lasting 94 hours and leaving up to 21,000 customers without power (29% of the county) at its peak.
July has historically been the worst month for outages in Washington County, with 82 events recorded during that month across the dataset.
Based on this history, Washington County earns a Reliability Grade of B, placing it in the 72nd percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Washington 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 Washington County.
| County | Grade | National percentile |
|---|---|---|
| Montgomery County | B | 71st |
| Somerset County | B | 74th |
| Frederick County | B | 74th |
| Anne Arundel County | B | 69th |
| Calvert County | B | 76th |
FAQ
How often does power go out in Washington County?
Between 2014 and 2025, Washington County recorded 649 outage events, averaging 2.6 hours each.
What is Washington County's reliability grade?
Washington County has a Reliability Grade of B, in the 72nd national percentile.
What was the worst power outage in Washington County?
The worst outage on record started April 20, 2025 (Thunderstorm Wind), lasting 94 hours and affecting up to 21,000 customers.