County annual report · FIPS 38017
2025 Cass County, ND Power Outage Report
In 2025, customers in Cass County, ND went without power for an average of 1.9 hours, a total of 238K customer-hours (North Dakota average 3.1 hours). That ranks 29th worst of 52 North Dakota counties and 2445th of 3,000 nationally.
Compared with ND, the US and 2024
Coverage line is EAGLE-I's share of North Dakota customers tracked each year.
Biggest outages in Cass 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 | June 21, 2025 03:15 | June 27, 2025 03:30 | 6d | 7,754 | 157K |
| 2 | August 8, 2025 08:45 | August 9, 2025 19:45 | 1d 11h | 6,296 | 9,428 |
| 3 | May 15, 2025 20:45 | May 16, 2025 05:45 | 9h | 3,140 | 2,041 |
| 4 | November 20, 2025 14:15 | November 26, 2025 07:00 | 5d 16h | 2,814 | 5,598 |
| 5 | June 8, 2025 04:30 | June 8, 2025 06:30 | 2h | 2,585 | 3,272 |
| 6 | July 26, 2025 09:45 | July 26, 2025 16:45 | 7h | 2,361 | 4,290 |
| 7 | January 10, 2025 11:45 | January 10, 2025 15:30 | 3h 45m | 2,357 | 3,929 |
| 8 | August 27, 2025 01:30 | August 27, 2025 05:30 | 4h | 2,325 | 5,237 |
| 9 | February 2, 2025 02:00 | February 2, 2025 03:30 | 1h 30m | 1,913 | 2,737 |
| 10 | June 9, 2025 14:00 | June 10, 2025 01:15 | 11h 15m | 1,727 | 1,367 |
Outage episodes by size in 2025: 64 reached 100+ customers, 18 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 Cass 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 |
| Northern States Power Co - Minnesota | 2024 | 2.6 hrs | 0.99 | 76 min | 0.80 |
| Nodak Electric Coop Inc | 2024 | 1.8 hrs | 1.07 | 1.8 hrs | 1.02 |
| Cass County Elec Coop Inc | 2024 | 24 min | 0.39 | 24 min | 0.39 |
| WAPA-- Western Area Power Administration | - | - | - | - | - |
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 North Dakota's customers in 2025; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 124,603 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. Cass County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Cass County, ND 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/north-dakota/cass-county