County annual report · FIPS 45079
2021 Richland County, SC Power Outage Report
In 2021, customers in Richland County, SC went without power for an average of 1.5 hours, a total of 351K customer-hours (South Carolina average 2.1 hours). That ranks 35th worst of 46 South Carolina counties and 2450th 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 Richland 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 26, 2021 14:30 | July 28, 2021 16:15 | 2d 1h | 17,754 | 46K |
| 2 | April 30, 2021 09:15 | May 1, 2021 01:15 | 16h | 7,463 | 4,713 |
| 3 | January 11, 2021 23:15 | January 12, 2021 06:30 | 7h 15m | 6,323 | 8,581 |
| 4 | July 12, 2021 21:30 | July 15, 2021 21:00 | 2d 23h | 5,515 | 3,981 |
| 5 | March 28, 2021 15:00 | March 30, 2021 02:30 | 1d 11h | 5,493 | 20K |
| 6 | July 26, 2021 04:00 | July 26, 2021 09:15 | 5h 15m | 5,401 | 18K |
| 7 | May 4, 2021 19:15 | May 6, 2021 02:15 | 1d 7h | 5,383 | 12K |
| 8 | July 8, 2021 08:45 | July 9, 2021 01:30 | 16h 45m | 4,464 | 5,504 |
| 9 | December 25, 2021 15:00 | December 26, 2021 04:00 | 13h | 4,025 | 9,725 |
| 10 | October 13, 2021 13:15 | October 13, 2021 21:45 | 8h 30m | 3,791 | 1,037 |
Outage episodes by size in 2021: 161 reached 100+ customers, 41 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 Richland 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 |
| Tri-County Electric Coop, Inc (SC) | 2021 | 4.1 hrs | 2.61 | 3.4 hrs | 2.31 |
| Mid-Carolina Electric Coop Inc | 2021 | 2.3 hrs | 2.13 | 1.6 hrs | 1.84 |
| Fairfield Electric Coop, Inc | - | - | - | - | - |
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 ÷ 227,559 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. Richland County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Richland 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/richland-county