Arlington County Power Outage History
2015–2025 · Virginia
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 |
|---|---|---|---|
| May 23, 2019 | 47 hrs | 35,742 (32%) | Thunderstorm Wind |
| Jul 29, 2023 | 52 hrs | 34,068 (31%) | Excessive Heat |
| Mar 2, 2018 | 84 hrs | 14,663 (13%) | Dense Fog |
| Jun 5, 2020 | 12 hrs | 12,142 (11%) | Thunderstorm Wind |
| May 22, 2022 | 24 hrs | 11,347 (10%) | Thunderstorm Wind |
Over the 11 years from 2015 to 2025, Arlington County recorded 1,316 distinct power outage events, averaging 2.5 hours per event.
The single worst outage on record in Arlington County started May 23, 2019 (Thunderstorm Wind), lasting 47 hours and leaving up to 35,742 customers without power (32% of the county) at its peak.
July has historically been the worst month for outages in Arlington County, with 153 events recorded during that month across the dataset.
Based on this history, Arlington County earns a Reliability Grade of C, placing it in the 55th percentile nationally for grid reliability (higher percentile = more reliable).
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Similar counties in Virginia
Counties with the closest reliability grade and national percentile to Arlington County.
| County | Grade | National percentile |
|---|---|---|
| Hopewell County | C | 55th |
| Greene County | C | 55th |
| Williamsburg County | C | 54th |
| Alexandria County | C | 56th |
| Norfolk County | C | 54th |
FAQ
How often does power go out in Arlington County?
Between 2015 and 2025, Arlington County recorded 1,316 outage events, averaging 2.5 hours each.
What is Arlington County's reliability grade?
Arlington County has a Reliability Grade of C, in the 55th national percentile.
What was the worst power outage in Arlington County?
The worst outage on record started May 23, 2019 (Thunderstorm Wind), lasting 47 hours and affecting up to 35,742 customers.