County annual report · FIPS 45027
2025 Clarendon County, SC Power Outage Report
In 2025, customers in Clarendon County, SC went without power for an average of 2.7 hours, a total of 48K customer-hours (South Carolina average 3.0 hours). That ranks 31st worst of 46 South Carolina counties and 2172nd of 3,000 nationally.
Compared with SC, the US and 2024
Coverage line is EAGLE-I's share of South Carolina customers tracked each year.
Biggest outages in Clarendon County, 2025
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 20, 2025 18:30 | June 20, 2025 18:45 | 15m | 2,899 | 725 |
| 2 | June 25, 2025 22:45 | June 26, 2025 07:15 | 8h 30m | 1,521 | 2,401 |
| 3 | December 2, 2025 18:30 | December 3, 2025 01:15 | 6h 45m | 1,471 | 1,732 |
| 4 | June 23, 2025 12:30 | June 23, 2025 21:15 | 8h 45m | 1,333 | 1,560 |
| 5 | November 1, 2025 03:30 | November 1, 2025 04:15 | 45m | 1,223 | 610 |
| 6 | June 17, 2025 17:30 | June 17, 2025 19:00 | 1h 30m | 1,020 | 522 |
| 7 | June 25, 2025 13:30 | June 25, 2025 14:15 | 45m | 1,020 | 510 |
| 8 | August 14, 2025 15:45 | August 14, 2025 21:00 | 5h 15m | 875 | 794 |
| 9 | July 6, 2025 05:30 | July 6, 2025 07:45 | 2h 15m | 825 | 1,581 |
| 10 | September 27, 2025 02:00 | September 27, 2025 07:00 | 5h | 708 | 1,065 |
Outage episodes by size in 2025: 56 reached 100+ customers, 7 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 Clarendon County reported on EIA Form 861 for 2025, 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) | 2024 | 17.2 hrs | 1.70 | 2.2 hrs | 1.22 |
| Black River Electric Coop, Inc - (SC) | 2024 | 3.8 hrs | 2.00 | 1.6 hrs | 1.35 |
| Santee Electric Coop, Inc | 2024 | 7.4 hrs | - | 2.5 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 n/a of South Carolina's customers in 2025; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 17,809 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. Clarendon County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Clarendon County, SC annual power outage report, 2025, 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/2025/south-carolina/clarendon-county