County annual report · FIPS 46011
2025 Brookings County, SD Power Outage Report
In 2025, customers in Brookings County, SD went without power for an average of 0.8 hours, a total of 16K customer-hours (South Dakota average 6.5 hours). That ranks 58th worst of 65 South Dakota counties and 2811th 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 Brookings 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 | November 18, 2025 00:15 | November 18, 2025 02:15 | 2h | 434 | 868 |
| 2 | June 20, 2025 05:15 | June 20, 2025 23:30 | 18h 15m | 360 | 1,247 |
| 3 | February 13, 2025 19:15 | February 13, 2025 20:15 | 1h | 325 | 245 |
| 4 | February 13, 2025 21:45 | February 14, 2025 19:00 | 21h 15m | 325 | 2,454 |
| 5 | September 5, 2025 16:15 | September 5, 2025 17:30 | 1h 15m | 313 | 348 |
| 6 | November 26, 2025 16:15 | December 5, 2025 13:45 | 8d 21h | 290 | 1,277 |
| 7 | July 27, 2025 02:30 | July 28, 2025 23:30 | 1d 21h | 216 | 102 |
| 8 | October 27, 2025 14:15 | October 27, 2025 15:15 | 1h | 214 | 136 |
| 9 | May 5, 2025 00:45 | May 5, 2025 03:30 | 2h 45m | 209 | 575 |
| 10 | September 29, 2025 18:30 | October 6, 2025 14:45 | 6d 20h | 197 | 617 |
Outage episodes by size in 2025: 14 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 Brookings 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 |
|---|---|---|---|---|---|
| Otter Tail Power Co | 2024 | 2.6 hrs | 1.37 | 1.9 hrs | 1.09 |
| Sioux Valley SW Elec Coop | 2024 | 46 min | 0.92 | 46 min | 0.92 |
| H-D Electric Coop Inc | 2018 | 2.6 hrs | 1.52 | 1.6 hrs | 1.14 |
| City of Brookings - (SD) | 2024 | 11 min | 0.14 | 11 min | 0.14 |
| WAPA-- Western Area Power Administration | - | - | - | - | - |
| Kingsbury Electric Coop, Inc | - | - | - | - | - |
| City of Arlington - (SD) | - | - | - | - | - |
| City of Aurora - (SD) | - | - | - | - | - |
| City of Volga - (SD) | - | - | - | - | - |
| City of White - (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 ÷ 19,030 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. Brookings County has data for 2017–2025.
Cite this report
MassOutage (massoutage.com), Brookings 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/brookings-county