County annual report · FIPS 45069
2021 Marlboro County, SC Power Outage Report
In 2021, customers in Marlboro County, SC went without power for an average of 1.4 hours, a total of 21K customer-hours (South Carolina average 2.1 hours). That ranks 37th worst of 46 South Carolina counties and 2495th 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 Marlboro 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 11, 2021 20:45 | May 11, 2021 22:15 | 1h 30m | 1,468 | 1,217 |
| 2 | April 25, 2021 10:45 | April 25, 2021 13:00 | 2h 15m | 1,466 | 1,540 |
| 3 | May 4, 2021 22:00 | May 5, 2021 14:00 | 16h | 1,437 | 9,544 |
| 4 | August 11, 2021 00:00 | August 11, 2021 03:45 | 3h 45m | 742 | 1,124 |
| 5 | May 19, 2021 08:30 | May 19, 2021 11:45 | 3h 15m | 676 | 1,813 |
| 6 | March 22, 2021 13:00 | March 22, 2021 17:00 | 4h | 488 | 747 |
| 7 | July 10, 2021 15:00 | July 10, 2021 19:30 | 4h 30m | 183 | 348 |
| 8 | May 7, 2021 19:30 | May 7, 2021 21:00 | 1h 30m | 174 | 260 |
| 9 | September 10, 2021 06:15 | September 10, 2021 12:15 | 6h | 174 | 989 |
| 10 | August 13, 2021 23:30 | August 14, 2021 01:30 | 2h | 126 | 222 |
Outage episodes by size in 2021: 10 reached 100+ customers, 3 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 Marlboro 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 |
|---|---|---|---|---|---|
| Duke Energy Progress - (NC) | 2021 | 3.1 hrs | 1.39 | 2.4 hrs | 1.34 |
| Duke Energy | - | - | - | - | - |
| MPD Electric Cooperative | - | - | - | - | - |
| City of Bennettsville - (SC) | - | - | - | - | - |
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 ÷ 14,959 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. Marlboro County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Marlboro 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/marlboro-county