County annual report · FIPS 45089
2020 Williamsburg County, SC Power Outage Report
In 2020, customers in Williamsburg County, SC went without power for an average of 2.1 hours, a total of 44K customer-hours (South Carolina average 5.7 hours). That ranks 40th worst of 46 South Carolina counties and 2223rd of 3,019 nationally.
Compared with SC, the US and 2019
Coverage line is EAGLE-I's share of South Carolina customers tracked each year.
Biggest outages in Williamsburg County, 2020
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 29, 2020 21:00 | May 30, 2020 05:15 | 8h 15m | 1,881 | 5,629 |
| 2 | February 7, 2020 09:30 | February 8, 2020 01:45 | 16h 15m | 1,420 | 3,689 |
| 3 | January 14, 2020 12:15 | January 15, 2020 02:45 | 14h 30m | 1,068 | 5,430 |
| 4 | June 19, 2020 19:30 | June 20, 2020 02:30 | 7h | 911 | 976 |
| 5 | September 5, 2020 02:15 | September 5, 2020 04:45 | 2h 30m | 818 | 1,095 |
| 6 | December 25, 2020 01:00 | December 25, 2020 09:15 | 8h 15m | 723 | 2,001 |
| 7 | September 29, 2020 22:15 | September 30, 2020 03:00 | 4h 45m | 619 | 891 |
| 8 | March 5, 2020 14:00 | March 5, 2020 22:45 | 8h 45m | 615 | 1,701 |
| 9 | April 13, 2020 12:45 | April 13, 2020 21:15 | 8h 30m | 462 | 1,287 |
| 10 | March 17, 2020 13:30 | March 17, 2020 21:30 | 8h | 419 | 954 |
Outage episodes by size in 2020: 42 reached 100+ customers, 3 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 2020, 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) | 2020 | 5.2 hrs | 1.81 | 2.3 hrs | 1.37 |
| Santee Electric Coop, Inc | 2020 | 4.3 hrs | - | 2.3 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 99% of South Carolina's customers in 2020; 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, 2020, 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/2020/south-carolina/williamsburg-county