County annual report · FIPS 45085
2022 Sumter County, SC Power Outage Report
In 2022, customers in Sumter County, SC went without power for an average of 5.1 hours, a total of 218K customer-hours (South Carolina average 4.4 hours). That ranks 22nd worst of 46 South Carolina counties and 1381st of 2,976 nationally.
Compared with SC, the US and 2021
Coverage line is EAGLE-I's share of South Carolina customers tracked each year.
Biggest outages in Sumter County, 2022
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | September 30, 2022 05:30 | October 1, 2022 19:45 | 1d 14h | 9,719 | 34K |
| 2 | January 16, 2022 09:30 | January 17, 2022 23:45 | 1d 14h | 6,496 | 37K |
| 3 | July 22, 2022 23:30 | July 23, 2022 05:15 | 5h 45m | 4,204 | 2,508 |
| 4 | January 3, 2022 07:15 | January 4, 2022 22:00 | 1d 14h | 3,979 | 37K |
| 5 | October 3, 2022 02:45 | October 3, 2022 07:15 | 4h 30m | 2,500 | 3,843 |
| 6 | June 16, 2022 22:45 | June 19, 2022 03:00 | 2d 4h | 2,413 | 18K |
| 7 | December 23, 2022 09:45 | December 25, 2022 04:00 | 1d 18h | 2,020 | 12K |
| 8 | March 17, 2022 04:00 | March 17, 2022 16:45 | 12h 45m | 1,672 | 6,305 |
| 9 | August 26, 2022 05:45 | August 26, 2022 14:00 | 8h 15m | 1,550 | 2,456 |
| 10 | May 2, 2022 15:45 | May 2, 2022 17:15 | 1h 30m | 1,400 | 1,499 |
Outage episodes by size in 2022: 80 reached 100+ customers, 15 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 Sumter County reported on EIA Form 861 for 2022, 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 Progress - (NC) | 2022 | 9.8 hrs | 2.35 | 2.2 hrs | 1.26 |
| Tri-County Electric Coop, Inc (SC) | 2022 | 9.7 hrs | 3.54 | 3.1 hrs | 2.14 |
| Black River Electric Coop, Inc - (SC) | 2022 | 4.9 hrs | 2.00 | 68 min | 0.92 |
| Duke Energy | - | - | - | - | - |
| City of Camden | - | - | - | - | - |
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 2022; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 42,515 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. Sumter County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Sumter County, SC annual power outage report, 2022, 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/2022/south-carolina/sumter-county