County annual report · FIPS 46017
2025 Buffalo County, SD Power Outage Report
In 2025, customers in Buffalo County, SD went without power for an average of 1.2 hours, a total of 703 customer-hours (South Dakota average 6.5 hours). That ranks 52nd worst of 65 South Dakota counties and 2705th 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 Buffalo 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 27, 2025 01:00 | July 27, 2025 03:00 | 2h | 59 | 105 |
| 2 | May 16, 2025 08:45 | May 16, 2025 11:00 | 2h 15m | 58 | 102 |
| 3 | December 27, 2025 20:00 | December 27, 2025 21:30 | 1h 30m | 38 | 48 |
| 4 | December 21, 2025 17:15 | December 21, 2025 19:15 | 2h | 37 | 74 |
| 5 | August 28, 2025 17:45 | August 28, 2025 22:15 | 4h 30m | 36 | 84 |
| 6 | November 24, 2025 22:00 | November 24, 2025 23:15 | 1h 15m | 33 | 18 |
| 7 | September 16, 2025 15:45 | September 16, 2025 21:45 | 6h | 18 | 104 |
| 8 | May 13, 2025 20:45 | May 13, 2025 22:15 | 1h 30m | 14 | 18 |
| 9 | August 16, 2025 10:45 | August 17, 2025 03:45 | 17h | 7 | 58 |
| 10 | January 27, 2025 15:45 | January 27, 2025 17:30 | 1h 45m | 6 | 7 |
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 Buffalo 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 | - | - | - | - | - |
| 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 ÷ 592 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. Buffalo County has data for 2019–2025.
Cite this report
MassOutage (massoutage.com), Buffalo 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/buffalo-county