County annual report · FIPS 46045
2025 Edmunds County, SD Power Outage Report
In 2025, customers in Edmunds County, SD went without power for an average of 1.9 hours, a total of 4,063 customer-hours (South Dakota average 6.5 hours). That ranks 43rd worst of 65 South Dakota counties and 2472nd 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 Edmunds 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 | May 11, 2025 22:45 | May 11, 2025 23:15 | 30m | 527 | 208 |
| 2 | April 18, 2025 00:00 | April 18, 2025 02:15 | 2h 15m | 504 | 1,021 |
| 3 | August 26, 2025 14:00 | August 26, 2025 19:00 | 5h | 306 | 1,103 |
| 4 | March 15, 2025 06:15 | March 15, 2025 07:30 | 1h 15m | 272 | 313 |
| 5 | July 27, 2025 02:15 | July 27, 2025 11:30 | 9h 15m | 255 | 478 |
| 6 | August 6, 2025 01:30 | August 6, 2025 01:45 | 15m | 236 | 59 |
| 7 | June 18, 2025 07:45 | June 18, 2025 08:45 | 1h | 223 | 160 |
| 8 | April 11, 2025 00:15 | April 11, 2025 01:30 | 1h 15m | 221 | 276 |
| 9 | August 15, 2025 10:15 | August 15, 2025 11:30 | 1h 15m | 161 | 163 |
| 10 | August 8, 2025 08:45 | August 8, 2025 09:45 | 1h | 75 | 70 |
Outage episodes by size in 2025: 9 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 Edmunds 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 |
| NorthWestern Energy - (SD) | 2024 | 76 min | 0.70 | 66 min | 0.65 |
| Northern Electric Coop, Inc | 2024 | 50 min | 0.67 | 50 min | 0.67 |
| FEM Electric Assn, Inc | 2018 | 3.8 hrs | 2.21 | 3.8 hrs | 2.21 |
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 ÷ 2,191 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. Edmunds County has data for 2017–2025.
Cite this report
MassOutage (massoutage.com), Edmunds 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/edmunds-county