County annual report · FIPS 45087
2023 Union County, SC Power Outage Report
In 2023, customers in Union County, SC went without power for an average of 0.4 hours, a total of 9,144 customer-hours (South Carolina average 2.7 hours). That ranks 46th worst of 46 South Carolina counties and 2841st of 2,977 nationally.
Compared with SC, the US and 2022
Coverage line is EAGLE-I's share of South Carolina customers tracked each year.
Biggest outages in Union County, 2023
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | June 12, 2023 20:15 | June 12, 2023 21:30 | 1h 15m | 1,232 | 1,540 |
| 2 | March 3, 2023 21:15 | March 4, 2023 01:45 | 4h 30m | 894 | 467 |
| 3 | August 15, 2023 20:00 | August 16, 2023 01:00 | 5h | 674 | 1,848 |
| 4 | June 11, 2023 17:45 | June 12, 2023 18:45 | 1d 1h | 412 | 500 |
| 5 | August 3, 2023 13:45 | August 3, 2023 16:15 | 2h 30m | 283 | 295 |
| 6 | July 10, 2023 10:15 | July 10, 2023 13:15 | 3h | 273 | 469 |
| 7 | October 12, 2023 10:45 | October 12, 2023 18:15 | 7h 30m | 193 | 900 |
| 8 | August 7, 2023 21:45 | August 8, 2023 06:15 | 8h 30m | 144 | 531 |
| 9 | August 12, 2023 23:15 | August 13, 2023 03:30 | 4h 15m | 113 | 108 |
| 10 | June 7, 2023 02:00 | June 7, 2023 05:00 | 3h | 102 | 194 |
Outage episodes by size in 2023: 10 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 2023, 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 | 2023 | 5.0 hrs | 1.68 | 3.3 hrs | 1.52 |
| Dominion Energy South Carolina, Inc | 2023 | 2.0 hrs | 1.48 | 90 min | 1.32 |
| Laurens Electric Coop, Inc | 2023 | 2.3 hrs | 1.31 | 1.9 hrs | 1.18 |
| 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 2023; 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, 2023, 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/2023/south-carolina/union-county