County annual report · FIPS 45079
2020 Richland County, SC Power Outage Report
In 2020, customers in Richland County, SC went without power for an average of 1.9 hours, a total of 441K customer-hours (South Carolina average 5.7 hours). That ranks 41st worst of 46 South Carolina counties and 2280th of 3,019 nationally.
Compared with SC, the US and 2019
Coverage line is EAGLE-I's share of South Carolina customers tracked each year.
Biggest outages in Richland County, 2020
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | April 6, 2020 13:30 | April 15, 2020 04:30 | 8d 15h | 17,199 | 134K |
| 2 | February 7, 2020 08:45 | February 11, 2020 03:45 | 3d 19h | 9,868 | 38K |
| 3 | May 16, 2020 13:15 | May 16, 2020 17:45 | 4h 30m | 6,629 | 1,801 |
| 4 | May 23, 2020 05:15 | May 24, 2020 08:45 | 1d 3h | 3,998 | 14K |
| 5 | June 27, 2020 12:45 | June 29, 2020 08:00 | 1d 19h | 3,933 | 22K |
| 6 | May 30, 2020 01:00 | May 30, 2020 11:00 | 10h | 3,700 | 5,312 |
| 7 | December 24, 2020 23:15 | December 26, 2020 02:45 | 1d 3h | 3,290 | 4,912 |
| 8 | January 12, 2020 01:00 | January 12, 2020 17:30 | 16h 30m | 2,771 | 8,350 |
| 9 | May 30, 2020 12:45 | May 31, 2020 05:45 | 17h | 2,748 | 4,900 |
| 10 | April 21, 2020 17:15 | April 21, 2020 23:15 | 6h | 2,561 | 3,944 |
Outage episodes by size in 2020: 179 reached 100+ customers, 37 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 2020, 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 | 2020 | 2.4 hrs | 1.40 | 88 min | 1.17 |
| Tri-County Electric Coop, Inc (SC) | 2020 | 4.1 hrs | 3.39 | 3.5 hrs | 3.25 |
| Mid-Carolina Electric Coop Inc | 2020 | 3.2 hrs | 2.27 | 1.8 hrs | 1.67 |
| 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 2020; 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, 2020, 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/2020/south-carolina/richland-county