County annual report · FIPS 45085
2019 Sumter County, SC Power Outage Report
In 2019, customers in Sumter County, SC went without power for an average of 3.9 hours, a total of 167K customer-hours (South Carolina average 4.8 hours). That ranks 21st worst of 46 South Carolina counties and 1356th of 2,945 nationally.
Compared with SC, the US and 2018
Coverage line is EAGLE-I's share of South Carolina customers tracked each year.
Biggest outages in Sumter County, 2019
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | July 13, 2019 17:30 | July 14, 2019 03:15 | 9h 45m | 14,520 | 21K |
| 2 | August 23, 2019 19:15 | August 24, 2019 09:15 | 14h | 5,542 | 7,812 |
| 3 | June 22, 2019 07:15 | June 24, 2019 04:00 | 1d 20h | 5,233 | 39K |
| 4 | June 6, 2019 11:15 | June 6, 2019 20:00 | 8h 45m | 4,231 | 3,786 |
| 5 | June 20, 2019 12:15 | June 21, 2019 09:00 | 20h 45m | 4,139 | 11K |
| 6 | February 21, 2019 12:45 | February 21, 2019 19:45 | 7h | 2,502 | 1,309 |
| 7 | July 23, 2019 23:45 | July 24, 2019 02:30 | 2h 45m | 2,465 | 1,018 |
| 8 | May 23, 2019 00:15 | May 23, 2019 05:15 | 5h | 2,450 | 655 |
| 9 | April 19, 2019 16:30 | April 20, 2019 17:30 | 1d 1h | 2,167 | 7,859 |
| 10 | May 4, 2019 21:15 | May 5, 2019 06:45 | 9h 30m | 1,849 | 4,693 |
Outage episodes by size in 2019: 78 reached 100+ customers, 17 reached 1,000+ customers, 1 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 2019, 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) | 2018 | 43.0 hrs | 2.71 | 2.6 hrs | 1.33 |
| Tri-County Electric Coop, Inc (SC) | 2018 | 6.4 hrs | 3.24 | 2.9 hrs | 2.31 |
| 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 2019; 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, 2019, 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/2019/south-carolina/sumter-county