County annual report · FIPS 45015
2021 Berkeley County, SC Power Outage Report
In 2021, customers in Berkeley County, SC went without power for an average of 1.1 hours, a total of 181K customer-hours (South Carolina average 2.1 hours). That ranks 42nd worst of 46 South Carolina counties and 2619th of 2,974 nationally.
Compared with SC, the US and 2020
Coverage line is EAGLE-I's share of South Carolina customers tracked each year.
Biggest outages in Berkeley County, 2021
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | April 1, 2021 22:45 | May 13, 2021 19:15 | 41d 20h | 10,958 | 50K |
| 2 | July 8, 2021 08:45 | July 8, 2021 20:30 | 11h 45m | 3,629 | 3,439 |
| 3 | August 10, 2021 13:00 | August 10, 2021 17:15 | 4h 15m | 3,162 | 3,797 |
| 4 | June 11, 2021 21:30 | June 12, 2021 02:00 | 4h 30m | 3,104 | 3,118 |
| 5 | May 15, 2021 00:45 | May 15, 2021 01:15 | 30m | 3,082 | 1,541 |
| 6 | November 17, 2021 00:45 | November 17, 2021 02:15 | 1h 30m | 2,868 | 1,711 |
| 7 | July 27, 2021 15:15 | July 27, 2021 22:30 | 7h 15m | 1,832 | 1,281 |
| 8 | October 12, 2021 12:00 | October 12, 2021 21:15 | 9h 15m | 1,628 | 1,300 |
| 9 | July 3, 2021 03:45 | July 3, 2021 09:15 | 5h 30m | 1,588 | 5,444 |
| 10 | July 15, 2021 14:45 | July 16, 2021 03:00 | 12h 15m | 1,575 | 1,668 |
Outage episodes by size in 2021: 112 reached 100+ customers, 23 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 Berkeley County reported on EIA Form 861 for 2021, 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 | 2021 | 1.5 hrs | 1.10 | 79 min | 1.02 |
| Edisto Electric Coop, Inc | 2021 | 3.0 hrs | - | 3.0 hrs | - |
| Berkeley Electric Coop Inc | 2021 | 1.8 hrs | 1.16 | 1.6 hrs | 1.10 |
| South Carolina Public Service Authority | 2021 | 2.2 hrs | 0.79 | 19 min | 0.27 |
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 2021; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 162,211 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. Berkeley County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Berkeley County, SC annual power outage report, 2021, 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/2021/south-carolina/berkeley-county