County annual report · FIPS 45027
2021 Clarendon County, SC Power Outage Report
In 2021, customers in Clarendon County, SC went without power for an average of 2.4 hours, a total of 42K customer-hours (South Carolina average 2.1 hours). That ranks 21st worst of 46 South Carolina counties and 2077th 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 Clarendon 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 | August 10, 2021 15:15 | August 10, 2021 17:30 | 2h 15m | 6,546 | 1,652 |
| 2 | June 19, 2021 20:00 | June 19, 2021 23:00 | 3h | 1,932 | 2,315 |
| 3 | August 18, 2021 19:15 | August 18, 2021 20:00 | 45m | 1,918 | 1,439 |
| 4 | January 20, 2021 19:45 | January 20, 2021 21:30 | 1h 45m | 1,185 | 1,547 |
| 5 | May 21, 2021 03:30 | May 21, 2021 04:45 | 1h 15m | 1,028 | 1,082 |
| 6 | December 8, 2021 14:45 | December 8, 2021 16:45 | 2h | 1,001 | 755 |
| 7 | October 11, 2021 04:30 | October 11, 2021 05:00 | 30m | 990 | 276 |
| 8 | July 18, 2021 17:30 | July 19, 2021 01:00 | 7h 30m | 812 | 1,401 |
| 9 | October 28, 2021 13:15 | October 28, 2021 16:45 | 3h 30m | 688 | 362 |
| 10 | October 26, 2021 15:30 | October 26, 2021 15:45 | 15m | 672 | 168 |
Outage episodes by size in 2021: 57 reached 100+ customers, 6 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 Clarendon 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 Progress - (NC) | 2021 | 3.1 hrs | 1.39 | 2.4 hrs | 1.34 |
| Santee Electric Coop, Inc | 2021 | 2.3 hrs | - | 2.2 hrs | - |
| Duke Energy | - | - | - | - | - |
| Black River Electric Coop, Inc - (SC) | - | - | - | - | - |
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 ÷ 17,809 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. Clarendon County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Clarendon 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/clarendon-county