County annual report · FIPS 45011
2021 Barnwell County, SC Power Outage Report
In 2021, customers in Barnwell County, SC went without power for an average of 2.0 hours, a total of 21K customer-hours (South Carolina average 2.1 hours). That ranks 29th worst of 46 South Carolina counties and 2219th 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 Barnwell 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 8, 2021 01:15 | July 8, 2021 19:30 | 18h 15m | 2,047 | 4,017 |
| 2 | June 11, 2021 04:30 | June 11, 2021 05:45 | 1h 15m | 1,454 | 1,281 |
| 3 | February 18, 2021 14:15 | February 18, 2021 15:45 | 1h 30m | 1,447 | 1,323 |
| 4 | July 29, 2021 12:15 | July 29, 2021 13:00 | 45m | 1,092 | 642 |
| 5 | October 30, 2021 07:45 | October 30, 2021 14:15 | 6h 30m | 874 | 5,477 |
| 6 | May 14, 2021 14:45 | May 14, 2021 15:45 | 1h | 506 | 127 |
| 7 | February 4, 2021 16:15 | February 4, 2021 16:45 | 30m | 353 | 177 |
| 8 | March 9, 2021 14:30 | March 9, 2021 15:45 | 1h 15m | 275 | 344 |
| 9 | December 4, 2021 01:45 | December 4, 2021 03:00 | 1h 15m | 231 | 248 |
| 10 | December 7, 2021 14:45 | December 7, 2021 19:15 | 4h 30m | 231 | 982 |
Outage episodes by size in 2021: 18 reached 100+ customers, 4 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 Barnwell 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 |
|---|---|---|---|---|---|
| Dominion Energy South Carolina, Inc | 2021 | 1.5 hrs | 1.10 | 79 min | 1.02 |
| Aiken Electric Coop Inc | 2021 | 1.9 hrs | - | 1.6 hrs | - |
| Edisto Electric Coop, Inc | 2021 | 3.0 hrs | - | 3.0 hrs | - |
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 ÷ 10,628 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. Barnwell County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Barnwell 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/barnwell-county