County annual report · FIPS 45019
2022 Charleston County, SC Power Outage Report
In 2022, customers in Charleston County, SC went without power for an average of 5.0 hours, a total of 1.2M customer-hours (South Carolina average 4.4 hours). That ranks 24th worst of 46 South Carolina counties and 1408th of 2,976 nationally.
Compared with SC, the US and 2021
Coverage line is EAGLE-I's share of South Carolina customers tracked each year.
Biggest outages in Charleston County, 2022
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 29, 2022 16:00 | October 7, 2022 05:15 | 7d 13h | 77,760 | 820K |
| 2 | June 17, 2022 22:30 | June 19, 2022 07:15 | 1d 8h | 6,329 | 28K |
| 3 | May 21, 2022 07:00 | May 21, 2022 16:00 | 9h | 4,222 | 6,751 |
| 4 | August 19, 2022 03:15 | August 21, 2022 07:15 | 2d 4h | 4,175 | 12K |
| 5 | July 1, 2022 09:45 | July 3, 2022 08:00 | 1d 22h | 3,915 | 21K |
| 6 | November 28, 2022 12:30 | November 28, 2022 21:00 | 8h 30m | 3,581 | 993 |
| 7 | July 22, 2022 11:30 | July 26, 2022 01:45 | 3d 14h | 3,548 | 20K |
| 8 | August 11, 2022 17:00 | August 13, 2022 03:00 | 1d 10h | 3,309 | 8,605 |
| 9 | December 26, 2022 11:30 | December 31, 2022 14:45 | 5d 3h | 2,930 | 1,889 |
| 10 | July 16, 2022 07:30 | July 17, 2022 01:45 | 18h 15m | 2,927 | 11K |
Outage episodes by size in 2022: 179 reached 100+ customers, 45 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 2022, 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 | 2022 | 3.9 hrs | 1.93 | 78 min | 1.07 |
| Berkeley Electric Coop Inc | 2022 | 5.4 hrs | 2.05 | 2.0 hrs | 1.34 |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about 99% of South Carolina's customers in 2022; 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, 2022, 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/2022/south-carolina/charleston-county