County annual report · FIPS 51153
2021 Prince William County, VA Power Outage Report
In 2021, customers in Prince William County, VA went without power for an average of 1.0 hours, a total of 230K customer-hours (Virginia average 8.7 hours). That ranks 123rd worst of 130 Virginia counties and 2659th 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 Prince William 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 24, 2021 16:45 | August 26, 2021 05:00 | 1d 12h | 38,810 | 65K |
| 2 | March 21, 2021 18:45 | March 21, 2021 21:15 | 2h 30m | 11,721 | 6,932 |
| 3 | August 11, 2021 07:15 | August 12, 2021 14:45 | 1d 7h | 6,435 | 19K |
| 4 | April 23, 2021 11:15 | April 23, 2021 12:00 | 45m | 6,035 | 3,219 |
| 5 | December 15, 2021 08:00 | December 16, 2021 22:30 | 1d 14h | 3,392 | 6,221 |
| 6 | October 26, 2021 13:30 | October 27, 2021 05:15 | 15h 45m | 3,250 | 4,956 |
| 7 | May 26, 2021 19:30 | May 28, 2021 00:45 | 1d 5h | 2,441 | 10K |
| 8 | May 29, 2021 13:30 | May 29, 2021 22:00 | 8h 30m | 2,020 | 4,800 |
| 9 | April 30, 2021 18:30 | May 2, 2021 01:00 | 1d 6h | 1,831 | 6,278 |
| 10 | November 8, 2021 12:30 | November 8, 2021 23:00 | 10h 30m | 1,826 | 634 |
Outage episodes by size in 2021: 120 reached 100+ customers, 23 reached 1,000+ customers, 2 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 Prince William 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 ÷ 225,231 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. Prince William County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Prince William 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/prince-william-county