County annual report · FIPS 45005
2021 Allendale County, SC Power Outage Report
In 2021, customers in Allendale County, SC went without power for an average of 3.9 hours, a total of 18K customer-hours (South Carolina average 2.1 hours). That ranks 9th worst of 46 South Carolina counties and 1572nd 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 Allendale 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 | June 15, 2021 23:45 | June 16, 2021 16:00 | 16h 15m | 949 | 2,097 |
| 2 | March 24, 2021 14:00 | March 24, 2021 19:00 | 5h | 859 | 866 |
| 3 | July 28, 2021 15:00 | July 28, 2021 18:00 | 3h | 725 | 1,759 |
| 4 | July 28, 2021 02:45 | July 28, 2021 08:15 | 5h 30m | 704 | 3,196 |
| 5 | January 9, 2021 05:30 | January 9, 2021 07:45 | 2h 15m | 472 | 1,047 |
| 6 | February 18, 2021 14:15 | February 18, 2021 15:15 | 1h | 431 | 358 |
| 7 | June 11, 2021 04:30 | June 11, 2021 05:45 | 1h 15m | 430 | 344 |
| 8 | April 23, 2021 18:00 | April 23, 2021 19:00 | 1h | 414 | 414 |
| 9 | May 29, 2021 06:45 | May 29, 2021 08:15 | 1h 30m | 413 | 620 |
| 10 | March 2, 2021 14:15 | March 2, 2021 20:30 | 6h 15m | 318 | 341 |
Outage episodes by size in 2021: 23 reached 100+ customers, 0 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 Allendale 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 | - |
| Palmetto Electric Coop Inc | 2021 | 1.5 hrs | 1.04 | 33 min | 0.70 |
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 ÷ 4,639 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. Allendale County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Allendale 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/allendale-county