County annual report · FIPS 45019
2024 Charleston County, SC Power Outage Report
In 2024, customers in Charleston County, SC went without power for an average of 4.2 hours, a total of 980K customer-hours (South Carolina average 50.1 hours). That ranks 40th worst of 46 South Carolina counties and 1783rd 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 Charleston 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 26, 2024 12:30 | September 30, 2024 04:30 | 3d 16h | 41,670 | 482K |
| 2 | January 9, 2024 05:45 | January 11, 2024 10:15 | 2d 4h | 27,416 | 134K |
| 3 | July 19, 2024 12:30 | July 20, 2024 02:15 | 13h 45m | 6,338 | 6,469 |
| 4 | August 5, 2024 04:15 | August 10, 2024 05:45 | 5d 1h | 6,195 | 65K |
| 5 | April 10, 2024 11:00 | April 10, 2024 22:00 | 11h | 5,744 | 1,527 |
| 6 | October 29, 2024 11:30 | October 29, 2024 23:30 | 12h | 4,524 | 1,583 |
| 7 | April 4, 2024 08:15 | April 5, 2024 01:45 | 17h 30m | 3,022 | 6,267 |
| 8 | January 25, 2024 06:15 | January 25, 2024 22:45 | 16h 30m | 2,920 | 1,751 |
| 9 | October 4, 2024 22:30 | October 5, 2024 04:15 | 5h 45m | 2,460 | 4,755 |
| 10 | April 27, 2024 10:15 | April 27, 2024 18:15 | 8h | 2,209 | 2,229 |
Outage episodes by size in 2024: 198 reached 100+ customers, 44 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 Charleston 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 |
|---|---|---|---|---|---|
| Dominion Energy South Carolina, Inc | 2024 | 31.8 hrs | 2.52 | 81 min | 1.19 |
| Berkeley Electric Coop Inc | 2024 | 4.9 hrs | 1.59 | 89 min | 0.94 |
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 ÷ 231,046 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. Charleston County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Charleston 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/charleston-county