County annual report · FIPS 46061
2025 Hanson County, SD Power Outage Report
In 2025, customers in Hanson County, SD went without power for an average of 2.7 hours, a total of 5,362 customer-hours (South Dakota average 6.5 hours). That ranks 30th worst of 65 South Dakota counties and 2160th 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 Hanson 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 | July 29, 2025 01:15 | July 29, 2025 05:30 | 4h 15m | 848 | 2,497 |
| 2 | June 12, 2025 01:15 | June 12, 2025 03:45 | 2h 30m | 756 | 1,743 |
| 3 | June 12, 2025 22:00 | June 12, 2025 22:15 | 15m | 145 | 36 |
| 4 | July 30, 2025 00:45 | July 30, 2025 10:45 | 10h | 86 | 411 |
| 5 | July 4, 2025 08:45 | July 4, 2025 11:45 | 3h | 33 | 11 |
| 6 | November 8, 2025 14:15 | November 8, 2025 17:00 | 2h 45m | 25 | 42 |
| 7 | January 28, 2025 23:15 | January 29, 2025 01:00 | 1h 45m | 24 | 41 |
| 8 | July 30, 2025 18:00 | July 31, 2025 02:45 | 8h 45m | 24 | 145 |
| 9 | April 28, 2025 13:30 | April 28, 2025 14:45 | 1h 15m | 16 | 19 |
| 10 | February 6, 2025 00:30 | February 6, 2025 05:30 | 5h | 15 | 63 |
Outage episodes by size in 2025: 3 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 Hanson 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 |
|---|---|---|---|---|---|
| Northern States Power Co - Minnesota | 2024 | 2.6 hrs | 0.99 | 76 min | 0.80 |
| NorthWestern Energy - (SD) | 2024 | 76 min | 0.70 | 66 min | 0.65 |
| WAPA-- Western Area Power Administration | - | - | - | - | - |
| Southeastern Electric Coop Inc - (SD) | - | - | - | - | - |
| Central Electric Coop, Inc - (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 ÷ 1,960 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. Hanson County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Hanson 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/hanson-county