County annual report · FIPS 51059
2021 Fairfax County, VA Power Outage Report
In 2021, customers in Fairfax County, VA went without power for an average of 4.1 hours, a total of 2.1M customer-hours (Virginia average 8.7 hours). That ranks 91st worst of 130 Virginia counties and 1526th of 2,974 nationally.
Compared with VA, the US and 2020
Coverage line is EAGLE-I's share of Virginia customers tracked each year.
Biggest outages in Fairfax County, 2021
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | August 10, 2021 21:15 | August 16, 2021 04:00 | 5d 6h | 55,737 | 625K |
| 2 | April 5, 2021 12:45 | April 7, 2021 08:30 | 1d 19h | 31,801 | 81K |
| 3 | April 30, 2021 04:45 | May 2, 2021 04:15 | 1d 23h | 27,782 | 169K |
| 4 | June 30, 2021 09:15 | July 4, 2021 06:00 | 3d 20h | 20,404 | 131K |
| 5 | May 26, 2021 13:15 | May 30, 2021 05:00 | 3d 15h | 17,658 | 155K |
| 6 | July 28, 2021 12:00 | July 30, 2021 09:15 | 1d 21h | 17,277 | 147K |
| 7 | May 7, 2021 13:15 | May 9, 2021 04:30 | 1d 15h | 9,506 | 12K |
| 8 | August 19, 2021 13:30 | August 31, 2021 02:15 | 11d 12h | 8,404 | 62K |
| 9 | May 4, 2021 02:45 | May 7, 2021 08:30 | 3d 5h | 6,938 | 21K |
| 10 | September 22, 2021 12:15 | September 24, 2021 09:45 | 1d 21h | 6,480 | 32K |
Outage episodes by size in 2021: 205 reached 100+ customers, 74 reached 1,000+ customers, 6 reached 10,000+ customers.
Utility reliability filed with the EIA
SAIDI (average outage time per customer) and SAIFI (average interruptions per customer) that utilities serving Fairfax County reported on EIA Form 861 for 2021, or their most recent earlier filing. Utility-wide figures, not county-specific.
| Utility | EIA year | SAIDI | SAIFI | SAIDI excl. major events | SAIFI excl. major events |
|---|---|---|---|---|---|
| Northern Virginia Elec Coop | 2016 | 46 min | 0.64 | 46 min | 0.64 |
| Virginia Electric & Power Co | - | - | - | - | - |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about 97% of Virginia's customers in 2021; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 513,143 customers (ORNL modeled county customer count), including major storm days. It is comparable across counties but is not the SAIDI a utility files.
- An outage event is a continuous stretch with customers out; counts at 100, 1,000 and 10,000+ use its peak.
- Years loaded: 2015–2025. Fairfax County has data for 2015–2017, 2020–2025.
Cite this report
MassOutage (massoutage.com), Fairfax County, VA annual power outage report, 2021, data as of Oct 3, 2026 02:41 UTC, sources: DOE EAGLE-I (https://eagle-i.doe.gov/); EAGLE-I modeled customer counts (MCC) (https://figshare.com/); EIA Form 861 (utility reliability) (https://www.eia.gov/electricity/data/eia861/). https://massoutage.com/reports/2021/virginia/fairfax-county