County annual report · FIPS 46111
2025 Sanborn County, SD Power Outage Report
In 2025, customers in Sanborn County, SD went without power for an average of 10.0 hours, a total of 15K customer-hours (South Dakota average 6.5 hours). That ranks 10th worst of 65 South Dakota counties and 801st 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 Sanborn 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 | August 16, 2025 08:00 | August 16, 2025 19:45 | 11h 45m | 730 | 6,189 |
| 2 | July 20, 2025 20:15 | July 21, 2025 03:15 | 7h | 221 | 888 |
| 3 | January 10, 2025 19:00 | January 10, 2025 19:15 | 15m | 194 | 49 |
| 4 | May 15, 2025 12:30 | May 15, 2025 19:45 | 7h 15m | 194 | 636 |
| 5 | May 22, 2025 14:30 | May 22, 2025 15:00 | 30m | 194 | 97 |
| 6 | April 28, 2025 09:00 | April 28, 2025 15:00 | 6h | 193 | 1,110 |
| 7 | June 12, 2025 01:15 | June 12, 2025 07:00 | 5h 45m | 193 | 1,063 |
| 8 | August 29, 2025 06:15 | August 29, 2025 09:45 | 3h 30m | 191 | 669 |
| 9 | May 3, 2025 11:45 | May 3, 2025 15:15 | 3h 30m | 185 | 522 |
| 10 | September 1, 2025 22:00 | September 2, 2025 05:00 | 7h | 121 | 832 |
Outage episodes by size in 2025: 10 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 Sanborn 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 | - | - | - | - | - |
| Dakota Energy Coop Inc | - | - | - | - | - |
| 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 ÷ 1,463 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. Sanborn County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Sanborn 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/sanborn-county