County annual report · FIPS 46065
2025 Hughes County, SD Power Outage Report
In 2025, customers in Hughes County, SD went without power for an average of 0.0 hours, a total of 339 customer-hours (South Dakota average 6.5 hours). That ranks 63rd worst of 65 South Dakota counties and 2964th 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 Hughes County, 2025
The 8 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | January 29, 2025 16:45 | January 29, 2025 18:30 | 1h 45m | 62 | 109 |
| 2 | April 23, 2025 21:30 | April 23, 2025 23:00 | 1h 30m | 62 | 86 |
| 3 | July 15, 2025 01:30 | July 15, 2025 02:00 | 30m | 62 | 31 |
| 4 | November 17, 2025 18:30 | November 17, 2025 20:00 | 1h 30m | 62 | 93 |
| 5 | March 29, 2025 11:45 | March 29, 2025 13:45 | 2h | 3 | 6 |
| 6 | March 22, 2025 15:45 | March 22, 2025 17:45 | 2h | 2 | 3 |
| 7 | August 27, 2025 20:45 | August 28, 2025 01:15 | 4h 30m | 2 | 7 |
| 8 | March 25, 2025 15:15 | March 25, 2025 19:30 | 4h 15m | 1 | 4 |
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 Hughes 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 |
|---|---|---|---|---|---|
| NorthWestern Energy - (SD) | 2024 | 76 min | 0.70 | 66 min | 0.65 |
| WAPA-- Western Area Power Administration | - | - | - | - | - |
| Oahe Electric Coop Inc | - | - | - | - | - |
| City of Pierre - (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 ÷ 14,362 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. Hughes County has data for 2019–2025.
Cite this report
MassOutage (massoutage.com), Hughes 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/); EIA Form 861 (utility reliability) (https://www.eia.gov/electricity/data/eia861/). https://massoutage.com/reports/2025/south-dakota/hughes-county