County annual report · FIPS 26027
2025 Cass County, MI Power Outage Report
In 2025, customers in Cass County, MI went without power for an average of 216.6 hours, a total of 741K customer-hours (Michigan average 12.9 hours). That ranks 5th worst of 83 Michigan counties and 15th of 3,000 nationally.
Compared with MI, the US and 2024
Coverage line is EAGLE-I's share of Michigan 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 | March 30, 2025 20:45 | April 5, 2025 03:00 | 5d 6h | 11,912 | 428K |
| 2 | May 16, 2025 02:30 | May 19, 2025 06:30 | 3d 4h | 5,082 | 146K |
| 3 | June 17, 2025 22:15 | June 19, 2025 19:00 | 1d 20h | 2,018 | 9,675 |
| 4 | January 25, 2025 15:45 | January 25, 2025 19:15 | 3h 30m | 1,904 | 5,230 |
| 5 | April 23, 2025 21:15 | April 24, 2025 11:45 | 14h 30m | 1,751 | 3,271 |
| 6 | June 24, 2025 19:30 | June 25, 2025 12:45 | 17h 15m | 1,749 | 3,696 |
| 7 | March 11, 2025 09:45 | March 11, 2025 15:00 | 5h 15m | 1,702 | 7,282 |
| 8 | May 13, 2025 03:45 | May 13, 2025 07:00 | 3h 15m | 1,698 | 3,821 |
| 9 | July 27, 2025 02:00 | July 27, 2025 17:00 | 15h | 1,512 | 20K |
| 10 | December 29, 2025 00:45 | December 30, 2025 03:00 | 1d 2h | 1,441 | 18K |
Outage episodes by size in 2025: 85 reached 100+ customers, 14 reached 1,000+ customers, 1 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 |
|---|---|---|---|---|---|
| Indiana Michigan Power Co | 2024 | 4.3 hrs | 1.25 | 2.5 hrs | 1.08 |
| Midwest Energy Cooperative - (MI) | 2024 | 7.2 hrs | 1.60 | 4.6 hrs | 1.30 |
| Wolverine Power Supply Coop | - | - | - | - | - |
| City of Dowagiac | - | - | - | - | - |
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 Michigan's customers in 2025; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 3,423 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, MI 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/michigan/cass-county