County annual report · FIPS 46105
2025 Perkins County, SD Power Outage Report
In 2025, customers in Perkins County, SD went without power for an average of 30.4 hours, a total of 27K customer-hours (South Dakota average 6.5 hours). That ranks 3rd worst of 65 South Dakota counties and 189th 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 Perkins 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 23, 2025 13:45 | July 24, 2025 15:45 | 1d 2h | 1,147 | 607 |
| 2 | July 25, 2025 10:45 | July 25, 2025 13:30 | 2h 45m | 1,147 | 3,154 |
| 3 | June 26, 2025 01:15 | June 26, 2025 02:45 | 1h 30m | 1,146 | 1,436 |
| 4 | July 17, 2025 14:15 | July 17, 2025 20:15 | 6h | 1,073 | 2,929 |
| 5 | November 12, 2025 17:00 | November 13, 2025 18:15 | 1d 1h | 585 | 13K |
| 6 | December 18, 2025 05:00 | December 19, 2025 20:30 | 1d 15h | 395 | 1,726 |
| 7 | April 26, 2025 18:45 | April 26, 2025 19:15 | 30m | 205 | 103 |
| 8 | October 9, 2025 13:45 | October 9, 2025 19:30 | 5h 45m | 120 | 127 |
| 9 | May 12, 2025 03:00 | May 13, 2025 13:45 | 1d 10h | 107 | 183 |
| 10 | August 20, 2025 22:15 | August 20, 2025 23:30 | 1h 15m | 91 | 114 |
Outage episodes by size in 2025: 9 reached 100+ customers, 4 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 Perkins 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 |
|---|---|---|---|---|---|
| Montana-Dakota Utilities Co | 2024 | 2.9 hrs | 1.26 | 2.1 hrs | 1.10 |
| WAPA-- Western Area Power Administration | - | - | - | - | - |
| Grand Electric Coop, Inc | - | - | - | - | - |
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 ÷ 890 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. Perkins County has data for 2017–2025.
Cite this report
MassOutage (massoutage.com), Perkins 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/perkins-county