County annual report · FIPS 45019
2019 Charleston County, SC Power Outage Report
In 2019, customers in Charleston County, SC went without power for an average of 21.3 hours, a total of 4.9M customer-hours (South Carolina average 4.8 hours). That ranks 1st worst of 46 South Carolina counties and 206th of 2,945 nationally.
Compared with SC, the US and 2018
Coverage line is EAGLE-I's share of South Carolina customers tracked each year.
Biggest outages in Charleston County, 2019
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 4, 2019 11:30 | September 13, 2019 03:45 | 8d 16h | 137,536 | 4.5M |
| 2 | May 1, 2019 10:15 | May 2, 2019 10:15 | 1d | 11,023 | 11K |
| 3 | April 19, 2019 10:00 | April 20, 2019 07:45 | 21h 45m | 8,570 | 35K |
| 4 | February 4, 2019 07:15 | February 4, 2019 22:45 | 15h 30m | 6,629 | 3,231 |
| 5 | June 20, 2019 11:15 | June 21, 2019 21:30 | 1d 10h | 4,357 | 13K |
| 6 | September 26, 2019 03:00 | September 26, 2019 08:15 | 5h 15m | 4,091 | 14K |
| 7 | January 9, 2019 13:00 | January 10, 2019 02:30 | 13h 30m | 3,940 | 1,151 |
| 8 | January 8, 2019 13:45 | January 9, 2019 02:15 | 12h 30m | 3,937 | 3,399 |
| 9 | January 23, 2019 13:00 | January 29, 2019 02:00 | 5d 13h | 3,928 | 9,931 |
| 10 | February 25, 2019 12:45 | February 28, 2019 03:45 | 2d 15h | 3,483 | 4,185 |
Outage episodes by size in 2019: 185 reached 100+ customers, 40 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 2019, 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 | 2018 | 2.8 hrs | 1.80 | 1.6 hrs | 1.37 |
| Berkeley Electric Coop Inc | 2018 | 2.9 hrs | 1.76 | 2.2 hrs | 1.55 |
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 2019; 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, 2019, 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/2019/south-carolina/charleston-county