County annual report · FIPS 45017
2021 Calhoun County, SC Power Outage Report
In 2021, customers in Calhoun County, SC went without power for an average of 2.2 hours, a total of 20K customer-hours (South Carolina average 2.1 hours). That ranks 25th worst of 46 South Carolina counties and 2147th 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 Calhoun 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 25, 2021 04:30 | May 25, 2021 05:30 | 1h | 3,782 | 3,279 |
| 2 | July 27, 2021 11:30 | July 27, 2021 13:00 | 1h 30m | 3,050 | 3,203 |
| 3 | April 1, 2021 23:00 | April 2, 2021 01:00 | 2h | 1,217 | 1,216 |
| 4 | July 31, 2021 21:00 | August 1, 2021 07:15 | 10h 15m | 1,213 | 1,147 |
| 5 | June 15, 2021 22:30 | June 16, 2021 04:15 | 5h 45m | 997 | 2,013 |
| 6 | June 15, 2021 01:45 | June 15, 2021 14:30 | 12h 45m | 546 | 1,198 |
| 7 | July 18, 2021 19:00 | July 19, 2021 03:15 | 8h 15m | 467 | 987 |
| 8 | May 25, 2021 09:45 | May 25, 2021 13:30 | 3h 45m | 405 | 315 |
| 9 | July 24, 2021 16:00 | July 24, 2021 16:30 | 30m | 359 | 180 |
| 10 | August 21, 2021 18:15 | August 21, 2021 21:30 | 3h 15m | 283 | 293 |
Outage episodes by size in 2021: 22 reached 100+ customers, 4 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 Calhoun 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 |
| Aiken Electric Coop Inc | 2021 | 1.9 hrs | - | 1.6 hrs | - |
| Tri-County Electric Coop, Inc (SC) | 2021 | 4.1 hrs | 2.61 | 3.4 hrs | 2.31 |
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 ÷ 9,147 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. Calhoun County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Calhoun 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/calhoun-county