County annual report · FIPS 45089
2023 Williamsburg County, SC Power Outage Report
In 2023, customers in Williamsburg County, SC went without power for an average of 3.5 hours, a total of 74K customer-hours (South Carolina average 2.7 hours). That ranks 21st worst of 46 South Carolina counties and 1804th of 2,977 nationally.
Compared with SC, the US and 2022
Coverage line is EAGLE-I's share of South Carolina customers tracked each year.
Biggest outages in Williamsburg 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 | May 9, 2023 22:00 | May 10, 2023 03:15 | 5h 15m | 5,856 | 3,121 |
| 2 | March 10, 2023 13:00 | March 10, 2023 19:30 | 6h 30m | 2,994 | 4,562 |
| 3 | December 11, 2023 04:45 | December 11, 2023 18:30 | 13h 45m | 2,631 | 3,366 |
| 4 | August 30, 2023 18:15 | August 31, 2023 22:45 | 1d 4h | 2,498 | 31K |
| 5 | August 11, 2023 17:45 | August 12, 2023 00:30 | 6h 45m | 1,166 | 635 |
| 6 | February 20, 2023 19:00 | February 20, 2023 20:00 | 1h | 854 | 428 |
| 7 | March 3, 2023 15:45 | March 3, 2023 17:30 | 1h 45m | 784 | 592 |
| 8 | June 11, 2023 22:30 | June 12, 2023 04:45 | 6h 15m | 729 | 1,411 |
| 9 | November 3, 2023 08:15 | November 3, 2023 10:15 | 2h | 610 | 1,068 |
| 10 | April 30, 2023 16:00 | May 1, 2023 02:30 | 10h 30m | 603 | 1,911 |
Outage episodes by size in 2023: 61 reached 100+ customers, 5 reached 1,000+ customers, 0 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 Williamsburg 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 |
|---|---|---|---|---|---|
| Duke Energy Progress - (NC) | 2023 | 3.7 hrs | 1.47 | 2.4 hrs | 1.22 |
| Santee Electric Coop, Inc | 2023 | 3.9 hrs | - | 2.4 hrs | - |
| Duke Energy | - | - | - | - | - |
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 South Carolina's customers in 2023; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 21,455 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. Williamsburg County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Williamsburg County, SC 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/south-carolina/williamsburg-county