County annual report · FIPS 45035
2021 Dorchester County, SC Power Outage Report
In 2021, customers in Dorchester County, SC went without power for an average of 1.4 hours, a total of 106K customer-hours (South Carolina average 2.1 hours). That ranks 36th worst of 46 South Carolina counties and 2486th 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 Dorchester 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 | November 23, 2021 13:45 | November 23, 2021 14:45 | 1h | 8,702 | 2,176 |
| 2 | May 17, 2021 18:30 | May 18, 2021 20:15 | 1d 1h | 3,988 | 1,546 |
| 3 | May 7, 2021 14:30 | May 7, 2021 19:45 | 5h 15m | 3,210 | 2,465 |
| 4 | June 20, 2021 12:30 | June 21, 2021 03:00 | 14h 30m | 2,870 | 5,141 |
| 5 | October 19, 2021 10:45 | October 19, 2021 18:45 | 8h | 2,626 | 3,508 |
| 6 | May 3, 2021 23:30 | May 4, 2021 09:15 | 9h 45m | 2,439 | 7,286 |
| 7 | August 23, 2021 12:15 | August 23, 2021 16:30 | 4h 15m | 2,010 | 514 |
| 8 | July 6, 2021 02:00 | July 6, 2021 04:15 | 2h 15m | 2,000 | 4,500 |
| 9 | June 22, 2021 06:15 | June 22, 2021 08:30 | 2h 15m | 1,995 | 1,049 |
| 10 | July 8, 2021 06:00 | July 8, 2021 19:30 | 13h 30m | 1,989 | 3,521 |
Outage episodes by size in 2021: 90 reached 100+ customers, 18 reached 1,000+ customers, 0 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 Dorchester 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 |
| Coastal Electric Coop, Inc | 2018 | 5.2 hrs | 2.73 | 3.2 hrs | 2.21 |
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 ÷ 73,269 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. Dorchester County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Dorchester 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/dorchester-county