County annual report · FIPS 45091
2021 York County, SC Power Outage Report
In 2021, customers in York County, SC went without power for an average of 0.8 hours, a total of 138K customer-hours (South Carolina average 2.1 hours). That ranks 46th worst of 46 South Carolina counties and 2735th 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 York 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 26, 2021 14:30 | July 27, 2021 21:30 | 1d 7h | 13,126 | 31K |
| 2 | December 14, 2021 20:15 | December 14, 2021 22:45 | 2h 30m | 5,589 | 2,821 |
| 3 | July 2, 2021 05:45 | July 2, 2021 06:00 | 15m | 4,025 | 1,006 |
| 4 | December 2, 2021 14:15 | December 3, 2021 07:30 | 17h 15m | 3,474 | 5,463 |
| 5 | January 30, 2021 12:30 | January 30, 2021 17:00 | 4h 30m | 3,416 | 1,285 |
| 6 | August 14, 2021 19:30 | August 15, 2021 23:15 | 1d 3h | 2,863 | 9,109 |
| 7 | March 22, 2021 16:30 | March 22, 2021 17:45 | 1h 15m | 2,627 | 657 |
| 8 | May 4, 2021 13:30 | May 5, 2021 06:30 | 17h | 2,622 | 10K |
| 9 | April 24, 2021 17:45 | April 24, 2021 22:45 | 5h | 2,385 | 1,497 |
| 10 | January 10, 2021 10:30 | January 10, 2021 18:45 | 8h 15m | 2,229 | 3,359 |
Outage episodes by size in 2021: 61 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 York 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 |
| York Electric Coop Inc | 2021 | 76 min | 0.75 | 67 min | 0.66 |
| City of Rock Hill - (SC) | 2021 | 47 min | 0.50 | 37 min | 0.46 |
| Duke Energy | - | - | - | - | - |
| Broad River Electric Coop, Inc | - | - | - | - | - |
| Fairfield Electric Coop, Inc | - | - | - | - | - |
| Lockhart Power Co | - | - | - | - | - |
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 ÷ 173,488 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. York County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), York 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/york-county