County annual report · FIPS 45045
2021 Greenville County, SC Power Outage Report
In 2021, customers in Greenville County, SC went without power for an average of 4.6 hours, a total of 963K customer-hours (South Carolina average 2.1 hours). That ranks 6th worst of 46 South Carolina counties and 1409th 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 Greenville 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 | July 25, 2021 09:45 | July 29, 2021 06:00 | 3d 20h | 23,496 | 286K |
| 2 | April 24, 2021 12:45 | April 25, 2021 04:15 | 15h 30m | 6,948 | 9,038 |
| 3 | October 12, 2021 13:00 | October 13, 2021 02:45 | 13h 45m | 6,027 | 3,183 |
| 4 | May 13, 2021 11:00 | May 14, 2021 22:45 | 1d 11h | 6,017 | 2,885 |
| 5 | October 8, 2021 04:45 | October 10, 2021 15:45 | 2d 11h | 5,619 | 17K |
| 6 | August 24, 2021 05:00 | August 24, 2021 11:00 | 6h | 4,485 | 18K |
| 7 | January 13, 2021 13:15 | January 14, 2021 05:00 | 15h 45m | 4,164 | 3,441 |
| 8 | June 10, 2021 08:45 | June 11, 2021 19:45 | 1d 11h | 3,732 | 4,486 |
| 9 | August 17, 2021 10:15 | August 19, 2021 03:00 | 1d 16h | 3,597 | 22K |
| 10 | February 6, 2021 14:15 | February 7, 2021 22:45 | 1d 8h | 3,539 | 27K |
Outage episodes by size in 2021: 153 reached 100+ customers, 55 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 Greenville 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 Carolinas, LLC | 2021 | 3.5 hrs | 1.20 | 2.5 hrs | 1.10 |
| Laurens Electric Coop, Inc | 2021 | 84 min | 0.92 | 84 min | 0.92 |
| Blue Ridge Electric Coop Inc - (SC) | 2021 | 2.3 hrs | - | 2.0 hrs | - |
| Duke Energy | - | - | - | - | - |
| Greer Commission of Public Wks | - | - | - | - | - |
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 ÷ 208,040 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. Greenville County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Greenville 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/greenville-county