County annual report · FIPS 45079
2025 Richland County, SC Power Outage Report
In 2025, customers in Richland County, SC went without power for an average of 2.9 hours, a total of 653K customer-hours (South Carolina average 3.0 hours). That ranks 27th worst of 46 South Carolina counties and 2111th of 3,000 nationally.
Compared with SC, the US and 2024
Coverage line is EAGLE-I's share of South Carolina customers tracked each year.
Biggest outages in Richland County, 2025
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | June 25, 2025 07:45 | June 26, 2025 17:00 | 1d 9h | 43,801 | 234K |
| 2 | June 7, 2025 23:45 | June 11, 2025 04:30 | 3d 4h | 23,109 | 184K |
| 3 | August 21, 2025 21:30 | August 22, 2025 04:00 | 6h 30m | 10,964 | 19K |
| 4 | January 27, 2025 10:45 | February 3, 2025 06:45 | 6d 20h | 4,227 | 2,326 |
| 5 | January 14, 2025 13:15 | January 15, 2025 05:15 | 16h | 4,148 | 1,149 |
| 6 | October 30, 2025 12:45 | October 31, 2025 01:00 | 12h 15m | 3,021 | 1,110 |
| 7 | November 17, 2025 13:15 | November 17, 2025 20:15 | 7h | 2,947 | 792 |
| 8 | September 7, 2025 12:00 | September 7, 2025 19:45 | 7h 45m | 2,692 | 1,634 |
| 9 | February 16, 2025 10:15 | February 17, 2025 01:30 | 15h 15m | 2,676 | 6,004 |
| 10 | June 17, 2025 13:45 | June 19, 2025 11:00 | 1d 21h | 2,598 | 9,201 |
Outage episodes by size in 2025: 178 reached 100+ customers, 47 reached 1,000+ customers, 3 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 2025, 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 | 2024 | 31.8 hrs | 2.52 | 81 min | 1.19 |
| Tri-County Electric Coop, Inc (SC) | 2024 | 17.4 hrs | 4.09 | 2.9 hrs | 2.33 |
| Mid-Carolina Electric Coop Inc | 2024 | 65.3 hrs | 3.22 | 2.0 hrs | 1.62 |
| 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 n/a of South Carolina's customers in 2025; 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, 2025, 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/2025/south-carolina/richland-county