County annual report · FIPS 45085
2020 Sumter County, SC Power Outage Report
In 2020, customers in Sumter County, SC went without power for an average of 3.2 hours, a total of 135K customer-hours (South Carolina average 5.7 hours). That ranks 30th worst of 46 South Carolina counties and 1824th of 3,019 nationally.
Compared with SC, the US and 2019
Coverage line is EAGLE-I's share of South Carolina customers tracked each year.
Biggest outages in Sumter County, 2020
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | October 7, 2020 23:45 | October 8, 2020 15:15 | 15h 30m | 5,165 | 18K |
| 2 | May 27, 2020 15:30 | May 28, 2020 08:15 | 16h 45m | 3,361 | 3,674 |
| 3 | April 6, 2020 18:30 | April 14, 2020 03:15 | 7d 8h | 2,623 | 6,257 |
| 4 | March 24, 2020 09:00 | March 24, 2020 12:00 | 3h | 1,925 | 5,775 |
| 5 | August 20, 2020 12:30 | August 20, 2020 19:45 | 7h 15m | 1,527 | 1,175 |
| 6 | February 7, 2020 10:00 | February 8, 2020 03:00 | 17h | 1,494 | 6,932 |
| 7 | February 13, 2020 14:15 | February 13, 2020 22:15 | 8h | 1,469 | 1,445 |
| 8 | December 28, 2020 09:30 | December 28, 2020 12:45 | 3h 15m | 1,452 | 2,919 |
| 9 | June 29, 2020 01:00 | June 29, 2020 04:00 | 3h | 1,434 | 2,321 |
| 10 | November 12, 2020 06:15 | November 12, 2020 14:15 | 8h | 1,184 | 2,023 |
Outage episodes by size in 2020: 89 reached 100+ customers, 12 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 2020, 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) | 2020 | 5.2 hrs | 1.81 | 2.3 hrs | 1.37 |
| Tri-County Electric Coop, Inc (SC) | 2020 | 4.1 hrs | 3.39 | 3.5 hrs | 3.25 |
| Duke Energy | - | - | - | - | - |
| Black River Electric Coop, Inc - (SC) | - | - | - | - | - |
| 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 2020; 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, 2020, 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/2020/south-carolina/sumter-county