County annual report · FIPS 45087
2024 Union County, SC Power Outage Report
In 2024, customers in Union County, SC went without power for an average of 26.2 hours, a total of 576K customer-hours (South Carolina average 50.1 hours). That ranks 24th worst of 46 South Carolina counties and 368th of 2,990 nationally.
Compared with SC, the US and 2023
Coverage line is EAGLE-I's share of South Carolina customers tracked each year.
Biggest outages in Union County, 2024
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 27, 2024 07:00 | October 8, 2024 21:45 | 11d 14h | 3,866 | 556K |
| 2 | March 18, 2024 16:15 | March 18, 2024 17:45 | 1h 30m | 765 | 1,148 |
| 3 | March 3, 2024 07:30 | March 3, 2024 10:45 | 3h 15m | 672 | 2,079 |
| 4 | July 31, 2024 02:00 | July 31, 2024 05:45 | 3h 45m | 645 | 843 |
| 5 | May 20, 2024 16:45 | May 20, 2024 18:00 | 1h 15m | 580 | 291 |
| 6 | January 9, 2024 17:45 | January 10, 2024 19:00 | 1d 1h | 449 | 2,843 |
| 7 | July 16, 2024 01:30 | July 16, 2024 03:15 | 1h 45m | 419 | 733 |
| 8 | August 17, 2024 23:30 | August 18, 2024 08:45 | 9h 15m | 412 | 1,604 |
| 9 | July 20, 2024 18:45 | July 20, 2024 21:00 | 2h 15m | 367 | 796 |
| 10 | September 22, 2024 12:45 | September 22, 2024 14:00 | 1h 15m | 335 | 352 |
Outage episodes by size in 2024: 25 reached 100+ customers, 1 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 Union County reported on EIA Form 861 for 2024, 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 Carolinas, LLC | 2024 | 78.6 hrs | 2.50 | 2.9 hrs | 1.26 |
| Dominion Energy South Carolina, Inc | 2024 | 31.8 hrs | 2.52 | 81 min | 1.19 |
| Laurens Electric Coop, Inc | 2024 | 138.5 hrs | 2.84 | 1.6 hrs | 1.14 |
| Broad River Electric Coop, Inc | - | - | - | - | - |
| Lockhart Power Co | - | - | - | - | - |
| City of Union - (SC) | - | - | - | - | - |
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 2024; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 21,940 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. Union County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Union County, SC annual power outage report, 2024, 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/2024/south-carolina/union-county