County annual report · FIPS 45051
2021 Horry County, SC Power Outage Report
In 2021, customers in Horry County, SC went without power for an average of 0.8 hours, a total of 212K customer-hours (South Carolina average 2.1 hours). That ranks 45th worst of 46 South Carolina counties and 2729th of 2,974 nationally.
Compared with SC, the US and 2020
Coverage line is EAGLE-I's share of South Carolina customers tracked each year.
Biggest outages in Horry County, 2021
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | July 8, 2021 10:15 | July 9, 2021 00:15 | 14h | 9,398 | 33K |
| 2 | August 9, 2021 12:00 | August 9, 2021 20:45 | 8h 45m | 7,352 | 7,153 |
| 3 | April 24, 2021 18:15 | April 25, 2021 02:30 | 8h 15m | 4,825 | 14K |
| 4 | September 4, 2021 12:00 | September 4, 2021 14:00 | 2h | 4,372 | 3,283 |
| 5 | July 9, 2021 21:15 | July 9, 2021 23:15 | 2h | 4,236 | 6,170 |
| 6 | May 3, 2021 19:30 | May 4, 2021 04:30 | 9h | 3,449 | 3,994 |
| 7 | July 18, 2021 19:15 | July 19, 2021 16:45 | 21h 30m | 2,824 | 1,782 |
| 8 | October 7, 2021 14:30 | October 7, 2021 18:15 | 3h 45m | 2,781 | 716 |
| 9 | November 7, 2021 01:45 | November 7, 2021 09:00 | 7h 15m | 2,490 | 3,781 |
| 10 | June 15, 2021 10:45 | June 16, 2021 01:45 | 15h | 2,329 | 3,096 |
Outage episodes by size in 2021: 151 reached 100+ customers, 40 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 Horry County reported on EIA Form 861 for 2021, 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) | 2021 | 3.1 hrs | 1.39 | 2.4 hrs | 1.34 |
| South Carolina Public Service Authority | 2021 | 2.2 hrs | 0.79 | 19 min | 0.27 |
| Horry Electric Coop Inc | 2021 | 72 min | 0.96 | 62 min | 0.85 |
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 2021; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 259,189 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. Horry County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Horry County, SC annual power outage report, 2021, 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/2021/south-carolina/horry-county