Fairfax CountyPower Outage History
What this grade means
Better than average — fewer or shorter outages than most counties. This county's outage history is better than the national median: recorded outages are less frequent and/or shorter in duration than a typical US county experienced over the same 12-year period. It isn't in the top tier nationally, but its track record points to lower-than-average outage risk.
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Jun 19, 2025 | 53 hrs | 72,758 (14%) | Flash Flood |
| Aug 10, 2021 | 38 hrs | 55,737 (11%) | Thunderstorm Wind |
| Jan 3, 2022 | 86 hrs | 48,982 (10%) | Winter Storm |
| May 16, 2025 | 50 hrs | 32,277 (6%) | Thunderstorm Wind |
| Apr 6, 2021 | 7 hrs | 31,801 (6%) | Unnamed event |
Was There an Outage on a Specific Date?
Pick a date to see whether a power outage was recorded for Fairfax County, Virginia that day.
Over the 12 years from 2014 to 2025, Fairfax County recorded 3,264 distinct power outage events, averaging 2.4 hours per event.
The single worst outage on record in Fairfax County started June 19, 2025 (Flash Flood), lasting 53 hours and leaving up to 72,758 customers without power (14% of the county) at its peak.
June has historically been the worst month for outages in Fairfax County, with 380 events recorded during that month across the dataset.
Based on this history, Fairfax County earns a Reliability Grade of B, placing it in the 74th percentile nationally for grid reliability (higher percentile = more reliable).
Similar counties in Virginia
Counties with the closest reliability grade and national percentile to Fairfax County.
| County | Grade | National percentile |
|---|---|---|
| Loudoun County | B | 75th |
| Covington County | B | 75th |
| Northampton County | B | 71st |
| Buena Vista County | B | 77th |
| Warren County | B | 70th |
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 Fairfax County?
Between 2014 and 2025, Fairfax County recorded 3,264 outage events, averaging 2.4 hours each.
What is Fairfax County's reliability grade?
Fairfax County has a Reliability Grade of B, in the 74th national percentile.
What was the worst power outage in Fairfax County?
The worst outage on record started June 19, 2025 (Flash Flood), lasting 53 hours and affecting up to 72,758 customers.