County annual report · FIPS 51107
2023 Loudoun County, VA Power Outage Report
In 2023, customers in Loudoun County, VA went without power for an average of 2.2 hours, a total of 414K customer-hours (Virginia average 4.6 hours). That ranks 110th worst of 130 Virginia counties and 2215th of 2,977 nationally.
Compared with VA, the US and 2022
Coverage line is EAGLE-I's share of Virginia customers tracked each year.
Biggest outages in Loudoun County, 2023
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 7, 2023 21:00 | August 9, 2023 09:00 | 1d 12h | 22,969 | 103K |
| 2 | May 9, 2023 10:45 | May 9, 2023 19:45 | 9h | 7,747 | 3,768 |
| 3 | May 1, 2023 12:45 | May 2, 2023 10:30 | 21h 45m | 7,702 | 8,463 |
| 4 | July 29, 2023 17:30 | July 30, 2023 21:15 | 1d 3h | 6,435 | 12K |
| 5 | July 14, 2023 21:15 | July 16, 2023 11:30 | 1d 14h | 5,978 | 19K |
| 6 | April 1, 2023 19:30 | April 3, 2023 06:45 | 1d 11h | 5,448 | 41K |
| 7 | June 23, 2023 12:30 | June 23, 2023 19:00 | 6h 30m | 4,250 | 3,187 |
| 8 | July 13, 2023 18:30 | July 14, 2023 06:30 | 12h | 4,173 | 4,202 |
| 9 | April 11, 2023 14:00 | April 24, 2023 22:45 | 13d 8h | 4,065 | 11K |
| 10 | May 16, 2023 14:00 | May 16, 2023 17:15 | 3h 15m | 3,585 | 2,523 |
Outage episodes by size in 2023: 123 reached 100+ customers, 34 reached 1,000+ customers, 1 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 Loudoun County reported on EIA Form 861 for 2023, 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 | 2023 | 1.8 hrs | 0.88 | 40 min | 0.57 |
| 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 n/a of Virginia's customers in 2023; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 187,874 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. Loudoun County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Loudoun County, VA annual power outage report, 2023, 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/2023/virginia/loudoun-county