County annual report · FIPS 45067
2021 Marion County, SC Power Outage Report
In 2021, customers in Marion County, SC went without power for an average of 3.2 hours, a total of 28K customer-hours (South Carolina average 2.1 hours). That ranks 14th worst of 46 South Carolina counties and 1764th 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 Marion 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 | June 4, 2021 04:00 | June 4, 2021 06:30 | 2h 30m | 3,744 | 4,394 |
| 2 | January 8, 2021 09:15 | January 8, 2021 10:45 | 1h 30m | 1,407 | 1,759 |
| 3 | August 10, 2021 06:15 | August 10, 2021 15:15 | 9h | 1,352 | 5,526 |
| 4 | August 5, 2021 17:30 | August 5, 2021 21:30 | 4h | 1,064 | 948 |
| 5 | June 15, 2021 19:45 | June 16, 2021 00:15 | 4h 30m | 1,034 | 1,335 |
| 6 | December 2, 2021 13:15 | December 2, 2021 23:45 | 10h 30m | 986 | 509 |
| 7 | August 19, 2021 14:15 | August 19, 2021 16:30 | 2h 15m | 936 | 587 |
| 8 | July 18, 2021 20:45 | July 19, 2021 02:15 | 5h 30m | 909 | 725 |
| 9 | April 20, 2021 16:15 | April 20, 2021 16:45 | 30m | 813 | 214 |
| 10 | November 18, 2021 10:45 | November 18, 2021 12:15 | 1h 30m | 518 | 260 |
Outage episodes by size in 2021: 25 reached 100+ customers, 5 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 Marion 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 | - | - | - | - | - |
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 ÷ 8,497 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. Marion County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Marion 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/marion-county