County annual report · FIPS 46027
2025 Clay County, SD Power Outage Report
In 2025, customers in Clay County, SD went without power for an average of 0.0 hours, a total of 58 customer-hours (South Dakota average 6.5 hours). That ranks 65th worst of 65 South Dakota counties and 2978th of 3,000 nationally.
Compared with SD, the US and 2024
Coverage line is EAGLE-I's share of South Dakota customers tracked each year.
Biggest outages in Clay County, 2025
The 5 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 22:15 | June 25, 2025 23:15 | 1h | 13 | 6 |
| 2 | July 29, 2025 11:30 | July 29, 2025 19:30 | 8h | 1 | 8 |
| 3 | August 21, 2025 23:15 | August 22, 2025 00:30 | 1h 15m | 1 | 1 |
| 4 | September 22, 2025 20:45 | September 22, 2025 21:15 | 30m | 1 | 1 |
| 5 | November 19, 2025 20:00 | November 21, 2025 14:45 | 1d 18h | 1 | 43 |
Outage episodes by size in 2025: 0 reached 100+ customers, 0 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 Clay 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 |
|---|---|---|---|---|---|
| WAPA-- Western Area Power Administration | - | - | - | - | - |
| Southeastern Electric Coop Inc - (SD) | - | - | - | - | - |
| Clay-Union Electric Corp | - | - | - | - | - |
| City of Vermillion - (SD) | - | - | - | - | - |
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 Dakota's customers in 2025; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 8,444 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. Clay County has data for 2019–2025.
Cite this report
MassOutage (massoutage.com), Clay County, SD 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/). https://massoutage.com/reports/2025/south-dakota/clay-county