County annual report · FIPS 45065
2021 McCormick County, SC Power Outage Report
In 2021, customers in McCormick County, SC went without power for an average of 9.1 hours, a total of 37K customer-hours (South Carolina average 2.1 hours). That ranks 1st worst of 46 South Carolina counties and 844th 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 McCormick 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 | May 20, 2021 10:45 | May 20, 2021 12:00 | 1h 15m | 1,895 | 2,369 |
| 2 | November 30, 2021 16:15 | November 30, 2021 17:00 | 45m | 1,303 | 977 |
| 3 | November 2, 2021 02:30 | November 2, 2021 04:15 | 1h 45m | 1,295 | 2,165 |
| 4 | October 20, 2021 18:30 | October 20, 2021 21:45 | 3h 15m | 1,288 | 1,330 |
| 5 | August 31, 2021 16:30 | August 31, 2021 22:45 | 6h 15m | 1,274 | 1,849 |
| 6 | June 9, 2021 17:00 | June 9, 2021 19:30 | 2h 30m | 1,245 | 2,092 |
| 7 | April 22, 2021 05:15 | April 22, 2021 19:15 | 14h | 1,239 | 8,476 |
| 8 | May 27, 2021 22:15 | May 28, 2021 00:00 | 1h 45m | 1,233 | 2,158 |
| 9 | March 28, 2021 16:30 | March 29, 2021 00:30 | 8h | 1,036 | 1,003 |
| 10 | June 20, 2021 15:30 | June 20, 2021 16:00 | 30m | 963 | 482 |
Outage episodes by size in 2021: 26 reached 100+ customers, 9 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 McCormick 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 |
|---|---|---|---|---|---|
| Duke Energy Carolinas, LLC | 2021 | 3.5 hrs | 1.20 | 2.5 hrs | 1.10 |
| Dominion Energy South Carolina, Inc | 2021 | 1.5 hrs | 1.10 | 79 min | 1.02 |
| Aiken Electric Coop Inc | 2021 | 1.9 hrs | - | 1.6 hrs | - |
| Little River Electric Coop Inc | - | - | - | - | - |
| Town of McCormick - (SC) | - | - | - | - | - |
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 ÷ 4,091 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. McCormick County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), McCormick 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/mccormick-county