County annual report · FIPS 45035
2025 Dorchester County, SC Power Outage Report
In 2025, customers in Dorchester County, SC went without power for an average of 2.8 hours, a total of 208K customer-hours (South Carolina average 3.0 hours). That ranks 28th worst of 46 South Carolina counties and 2121st 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 Dorchester 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 21, 2025 01:45 | March 21, 2025 04:15 | 2h 30m | 12,386 | 11K |
| 2 | June 9, 2025 21:00 | June 10, 2025 09:30 | 12h 30m | 11,447 | 21K |
| 3 | October 25, 2025 17:45 | October 25, 2025 20:30 | 2h 45m | 4,718 | 7,579 |
| 4 | August 16, 2025 10:45 | August 17, 2025 02:45 | 16h | 4,513 | 3,940 |
| 5 | July 30, 2025 05:30 | July 30, 2025 12:45 | 7h 15m | 4,455 | 5,168 |
| 6 | August 10, 2025 12:30 | August 10, 2025 19:00 | 6h 30m | 4,420 | 5,151 |
| 7 | April 24, 2025 11:00 | April 24, 2025 21:45 | 10h 45m | 4,206 | 1,635 |
| 8 | October 10, 2025 05:30 | October 10, 2025 08:00 | 2h 30m | 3,465 | 6,096 |
| 9 | September 24, 2025 13:45 | September 24, 2025 15:45 | 2h | 3,379 | 858 |
| 10 | April 8, 2025 08:15 | April 8, 2025 11:15 | 3h | 3,342 | 840 |
Outage episodes by size in 2025: 148 reached 100+ customers, 33 reached 1,000+ customers, 2 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 Dorchester 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 | - |
| Berkeley Electric Coop Inc | 2024 | 4.9 hrs | 1.59 | 89 min | 0.94 |
| 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 ÷ 73,269 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. Dorchester County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Dorchester 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/dorchester-county