County annual report · FIPS 45019
2015 Charleston County, SC Power Outage Report
In 2015, customers in Charleston County, SC went without power for an average of 1.8 hours, a total of 409K customer-hours (South Carolina average 2.5 hours). That ranks 25th worst of 46 South Carolina counties and 1339th of 2,484 nationally.
Compared with SC, the US
Coverage line is EAGLE-I's share of South Carolina customers tracked each year.
Biggest outages in Charleston County, 2015
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | January 29, 2015 11:00 | January 30, 2015 01:30 | 14h 30m | 20,197 | 55K |
| 2 | July 23, 2015 12:15 | July 24, 2015 08:15 | 20h | 7,299 | 11K |
| 3 | October 2, 2015 13:15 | October 5, 2015 15:00 | 3d 1h | 6,826 | 83K |
| 4 | June 9, 2015 12:00 | June 11, 2015 21:30 | 2d 9h | 6,589 | 12K |
| 5 | March 4, 2015 10:30 | March 5, 2015 06:45 | 20h 15m | 6,575 | 2,633 |
| 6 | December 10, 2015 12:00 | December 11, 2015 01:15 | 13h 15m | 4,704 | 1,798 |
| 7 | July 13, 2015 11:45 | July 14, 2015 11:00 | 23h 15m | 4,062 | 11K |
| 8 | September 22, 2015 15:45 | September 29, 2015 21:00 | 7d 5h | 3,928 | 13K |
| 9 | May 20, 2015 12:15 | May 21, 2015 06:15 | 18h | 3,655 | 8,143 |
| 10 | September 4, 2015 12:00 | September 5, 2015 14:45 | 1d 2h | 2,820 | 4,949 |
Outage episodes by size in 2015: 153 reached 100+ customers, 42 reached 1,000+ customers, 1 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 2015, 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 | 2015 | 2.6 hrs | 1.62 | 1.6 hrs | 1.34 |
| Berkeley Electric Coop Inc | 2015 | 3.5 hrs | 2.11 | 2.4 hrs | 1.72 |
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 2015; 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, 2015, 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/2015/south-carolina/charleston-county