County annual report · FIPS 45023
2024 Chester County, SC Power Outage Report
In 2024, customers in Chester County, SC went without power for an average of 31.7 hours, a total of 651K customer-hours (South Carolina average 50.1 hours). That ranks 22nd worst of 46 South Carolina counties and 310th of 2,990 nationally.
Compared with SC, the US and 2023
Coverage line is EAGLE-I's share of South Carolina customers tracked each year.
Biggest outages in Chester County, 2024
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | September 27, 2024 01:00 | October 4, 2024 19:00 | 7d 18h | 12,625 | 545K |
| 2 | September 16, 2024 23:00 | September 17, 2024 13:30 | 14h 30m | 2,727 | 4,176 |
| 3 | October 15, 2024 11:15 | October 15, 2024 15:30 | 4h 15m | 2,685 | 1,508 |
| 4 | February 28, 2024 13:30 | February 29, 2024 13:15 | 23h 45m | 2,310 | 7,454 |
| 5 | August 9, 2024 05:00 | August 9, 2024 16:30 | 11h 30m | 1,965 | 15K |
| 6 | August 2, 2024 18:15 | August 2, 2024 21:15 | 3h | 1,433 | 2,257 |
| 7 | April 12, 2024 21:15 | April 13, 2024 12:15 | 15h | 1,311 | 2,903 |
| 8 | June 10, 2024 01:15 | June 11, 2024 10:45 | 1d 9h | 1,229 | 7,484 |
| 9 | April 20, 2024 21:15 | April 22, 2024 07:45 | 1d 10h | 1,169 | 1,179 |
| 10 | June 5, 2024 13:45 | June 6, 2024 01:45 | 12h | 1,103 | 1,745 |
Outage episodes by size in 2024: 74 reached 100+ customers, 10 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 Chester County reported on EIA Form 861 for 2024, 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 | 2024 | 78.6 hrs | 2.50 | 2.9 hrs | 1.26 |
| York Electric Coop Inc | 2024 | 16.3 hrs | 2.20 | 89 min | 1.69 |
| 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 2024; 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, 2024, 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/2024/south-carolina/chester-county