County annual report · FIPS 45089
2018 Williamsburg County, SC Power Outage Report
In 2018, customers in Williamsburg County, SC went without power for an average of 4.0 hours, a total of 87K customer-hours (South Carolina average 5.2 hours). That ranks 27th worst of 46 South Carolina counties and 1243rd of 2,798 nationally.
Compared with SC, the US and 2017
Coverage line is EAGLE-I's share of South Carolina customers tracked each year.
Biggest outages in Williamsburg County, 2018
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 5, 2018 17:15 | August 5, 2018 21:00 | 3h 45m | 4,505 | 4,925 |
| 2 | January 30, 2018 16:15 | January 30, 2018 17:15 | 1h | 2,613 | 1,002 |
| 3 | October 11, 2018 08:45 | October 12, 2018 21:45 | 1d 13h | 2,302 | 16K |
| 4 | May 26, 2018 17:15 | May 29, 2018 13:30 | 2d 20h | 1,797 | 1,073 |
| 5 | August 31, 2018 03:45 | August 31, 2018 08:00 | 4h 15m | 1,301 | 2,101 |
| 6 | April 15, 2018 14:15 | April 16, 2018 09:30 | 19h 15m | 1,253 | 4,482 |
| 7 | January 29, 2018 15:15 | January 29, 2018 18:15 | 3h | 1,236 | 2,474 |
| 8 | September 8, 2018 05:30 | September 8, 2018 08:00 | 2h 30m | 1,235 | 2,182 |
| 9 | September 15, 2018 04:00 | September 16, 2018 15:30 | 1d 11h | 1,116 | 17K |
| 10 | September 14, 2018 20:00 | September 14, 2018 21:45 | 1h 45m | 944 | 480 |
Outage episodes by size in 2018: 57 reached 100+ customers, 9 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 2018, 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 2018; 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, 2018, 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/2018/south-carolina/williamsburg-county