County annual report · FIPS 45023
2023 Chester County, SC Power Outage Report
In 2023, customers in Chester County, SC went without power for an average of 2.4 hours, a total of 50K customer-hours (South Carolina average 2.7 hours). That ranks 31st worst of 46 South Carolina counties and 2142nd of 2,977 nationally.
Compared with SC, the US and 2022
Coverage line is EAGLE-I's share of South Carolina customers tracked each year.
Biggest outages in Chester County, 2023
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 7, 2023 22:15 | August 8, 2023 12:15 | 14h | 2,361 | 5,186 |
| 2 | January 31, 2023 21:15 | February 1, 2023 00:00 | 2h 45m | 1,187 | 1,781 |
| 3 | January 13, 2023 14:45 | January 13, 2023 16:00 | 1h 15m | 1,158 | 1,448 |
| 4 | December 22, 2023 19:15 | December 22, 2023 22:30 | 3h 15m | 926 | 928 |
| 5 | August 15, 2023 13:45 | August 16, 2023 17:00 | 1d 3h | 831 | 2,995 |
| 6 | January 4, 2023 11:15 | January 4, 2023 20:00 | 8h 45m | 612 | 1,344 |
| 7 | October 30, 2023 13:00 | October 30, 2023 16:15 | 3h 15m | 573 | 501 |
| 8 | July 14, 2023 22:15 | July 16, 2023 04:15 | 1d 6h | 562 | 4,106 |
| 9 | September 11, 2023 13:15 | September 11, 2023 19:45 | 6h 30m | 546 | 417 |
| 10 | August 28, 2023 18:45 | August 29, 2023 01:15 | 6h 30m | 515 | 143 |
Outage episodes by size in 2023: 42 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 Chester County reported on EIA Form 861 for 2023, 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 | 2023 | 5.0 hrs | 1.68 | 3.3 hrs | 1.52 |
| York Electric Coop Inc | 2023 | 1.6 hrs | 0.82 | 89 min | 0.81 |
| Duke Energy | - | - | - | - | - |
| 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 n/a of South Carolina's customers in 2023; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 20,548 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. Chester County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Chester County, SC annual power outage report, 2023, 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/2023/south-carolina/chester-county