County annual report · FIPS 45029
2025 Colleton County, SC Power Outage Report
In 2025, customers in Colleton County, SC went without power for an average of 5.1 hours, a total of 105K customer-hours (South Carolina average 3.0 hours). That ranks 12th worst of 46 South Carolina counties and 1462nd 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 Colleton 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 | March 23, 2025 01:30 | March 23, 2025 03:15 | 1h 45m | 3,583 | 4,071 |
| 2 | August 21, 2025 05:15 | August 21, 2025 11:15 | 6h | 2,754 | 8,981 |
| 3 | July 21, 2025 21:15 | July 22, 2025 03:45 | 6h 30m | 2,532 | 2,298 |
| 4 | June 10, 2025 13:45 | June 10, 2025 20:45 | 7h | 2,506 | 3,080 |
| 5 | October 13, 2025 06:00 | October 13, 2025 13:45 | 7h 45m | 1,813 | 5,411 |
| 6 | July 5, 2025 16:30 | July 5, 2025 21:15 | 4h 45m | 1,800 | 1,892 |
| 7 | October 31, 2025 13:45 | October 31, 2025 16:30 | 2h 45m | 1,505 | 557 |
| 8 | June 18, 2025 17:30 | June 18, 2025 20:45 | 3h 15m | 1,449 | 998 |
| 9 | June 26, 2025 01:45 | June 26, 2025 14:15 | 12h 30m | 1,333 | 5,876 |
| 10 | November 25, 2025 16:15 | November 25, 2025 17:15 | 1h | 1,320 | 661 |
Outage episodes by size in 2025: 97 reached 100+ customers, 13 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 Colleton 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 |
|---|---|---|---|---|---|
| Dominion Energy South Carolina, Inc | 2024 | 31.8 hrs | 2.52 | 81 min | 1.19 |
| Edisto Electric Coop, Inc | 2024 | 39.2 hrs | - | 4.9 hrs | - |
| Coastal Electric Coop, Inc | 2018 | 5.2 hrs | 2.73 | 3.2 hrs | 2.21 |
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 ÷ 20,355 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. Colleton County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Colleton 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/colleton-county