County annual report · FIPS 45085
2017 Sumter County, SC Power Outage Report
In 2017, customers in Sumter County, SC went without power for an average of 3.0 hours, a total of 127K customer-hours (South Carolina average 4.4 hours). That ranks 27th worst of 46 South Carolina counties and 1336th of 2,786 nationally.
Compared with SC, the US and 2016
Coverage line is EAGLE-I's share of South Carolina customers tracked each year.
Biggest outages in Sumter County, 2017
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | August 29, 2017 18:30 | August 30, 2017 01:30 | 7h | 7,795 | 12K |
| 2 | September 11, 2017 10:45 | September 13, 2017 05:45 | 1d 19h | 3,904 | 25K |
| 3 | May 24, 2017 18:15 | May 25, 2017 04:00 | 9h 45m | 2,660 | 5,314 |
| 4 | July 16, 2017 17:45 | July 16, 2017 23:45 | 6h | 1,919 | 1,233 |
| 5 | July 19, 2017 19:45 | July 20, 2017 05:30 | 9h 45m | 1,775 | 2,782 |
| 6 | April 16, 2017 13:45 | April 16, 2017 17:00 | 3h 15m | 1,652 | 834 |
| 7 | October 23, 2017 13:15 | October 24, 2017 05:30 | 16h 15m | 1,474 | 7,666 |
| 8 | November 10, 2017 18:30 | November 10, 2017 18:45 | 15m | 1,398 | 350 |
| 9 | April 6, 2017 12:30 | April 7, 2017 02:15 | 13h 45m | 1,131 | 4,944 |
| 10 | November 24, 2017 22:30 | November 24, 2017 23:00 | 30m | 1,119 | 560 |
Outage episodes by size in 2017: 91 reached 100+ customers, 13 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 2017, 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) | 2017 | 3.2 hrs | 1.52 | 2.7 hrs | 1.47 |
| Tri-County Electric Coop, Inc (SC) | 2017 | 5.6 hrs | 3.43 | 2.9 hrs | 2.34 |
| 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 n/a of South Carolina's customers in 2017; 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, 2017, 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/2017/south-carolina/sumter-county