County annual report · FIPS 45023
2018 Chester County, SC Power Outage Report
In 2018, customers in Chester County, SC went without power for an average of 4.3 hours, a total of 89K customer-hours (South Carolina average 5.2 hours). That ranks 24th worst of 46 South Carolina counties and 1176th of 2,798 nationally.
Compared with SC, the US and 2017
Coverage line is EAGLE-I's share of South Carolina customers tracked each year.
Biggest outages in Chester County, 2018
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | January 18, 2018 12:30 | January 18, 2018 14:00 | 1h 30m | 2,067 | 2,011 |
| 2 | April 15, 2018 17:45 | April 18, 2018 00:15 | 2d 6h | 1,398 | 19K |
| 3 | June 5, 2018 15:45 | June 6, 2018 04:00 | 12h 15m | 1,333 | 7,048 |
| 4 | June 26, 2018 20:45 | June 29, 2018 04:30 | 2d 7h | 1,243 | 17K |
| 5 | September 15, 2018 04:00 | September 18, 2018 21:00 | 3d 17h | 1,073 | 20K |
| 6 | January 28, 2018 19:30 | January 28, 2018 20:45 | 1h 15m | 689 | 861 |
| 7 | October 11, 2018 08:45 | October 12, 2018 19:15 | 1d 10h | 549 | 3,012 |
| 8 | May 29, 2018 23:45 | May 30, 2018 13:45 | 14h | 436 | 2,109 |
| 9 | August 8, 2018 22:00 | August 10, 2018 02:30 | 1d 4h | 328 | 1,901 |
| 10 | February 26, 2018 23:30 | February 27, 2018 05:00 | 5h 30m | 290 | 476 |
Outage episodes by size in 2018: 29 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 Chester County reported on EIA Form 861 for 2018, 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 | 2018 | 13.1 hrs | 1.81 | 3.7 hrs | 1.19 |
| York Electric Coop Inc | 2018 | 2.1 hrs | 1.22 | 83 min | 0.91 |
| 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 99% of South Carolina's customers in 2018; 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, 2018, 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/2018/south-carolina/chester-county