County annual report · FIPS 45089
2019 Williamsburg County, SC Power Outage Report
In 2019, customers in Williamsburg County, SC went without power for an average of 5.5 hours, a total of 119K customer-hours (South Carolina average 4.8 hours). That ranks 11th worst of 46 South Carolina counties and 994th of 2,945 nationally.
Compared with SC, the US and 2018
Coverage line is EAGLE-I's share of South Carolina customers tracked each year.
Biggest outages in Williamsburg County, 2019
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | September 5, 2019 02:30 | September 7, 2019 21:15 | 2d 18h | 3,456 | 57K |
| 2 | June 22, 2019 09:45 | June 23, 2019 18:00 | 1d 8h | 2,668 | 14K |
| 3 | June 20, 2019 21:00 | June 21, 2019 06:45 | 9h 45m | 1,769 | 4,727 |
| 4 | April 19, 2019 17:00 | April 20, 2019 13:15 | 20h 15m | 1,668 | 6,937 |
| 5 | June 20, 2019 01:30 | June 20, 2019 03:15 | 1h 45m | 1,229 | 1,844 |
| 6 | July 4, 2019 13:45 | July 5, 2019 08:00 | 18h 15m | 1,170 | 3,843 |
| 7 | March 9, 2019 19:15 | March 9, 2019 21:15 | 2h | 945 | 978 |
| 8 | May 4, 2019 19:45 | May 5, 2019 03:00 | 7h 15m | 730 | 1,409 |
| 9 | January 25, 2019 21:00 | January 26, 2019 02:15 | 5h 15m | 569 | 598 |
| 10 | February 12, 2019 11:30 | February 12, 2019 20:30 | 9h | 564 | 1,259 |
Outage episodes by size in 2019: 48 reached 100+ customers, 6 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 2019, 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) | 2018 | 43.0 hrs | 2.71 | 2.6 hrs | 1.33 |
| Santee Electric Coop, Inc | 2018 | 6.9 hrs | - | 3.4 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 99% of South Carolina's customers in 2019; 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, 2019, 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/2019/south-carolina/williamsburg-county