County annual report · FIPS 26073
2025 Isabella County, MI Power Outage Report
In 2025, customers in Isabella County, MI went without power for an average of 13.3 hours, a total of 487K customer-hours (Michigan average 12.9 hours). That ranks 43rd worst of 83 Michigan counties and 577th 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 Isabella 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 | December 26, 2025 13:00 | January 1, 2026 00:00 | 5d 11h | 7,174 | 360K |
| 2 | July 16, 2025 01:45 | July 17, 2025 05:15 | 1d 3h | 4,178 | 25K |
| 3 | October 20, 2025 08:00 | October 20, 2025 13:00 | 5h | 2,310 | 12K |
| 4 | May 16, 2025 03:15 | May 19, 2025 20:15 | 3d 17h | 1,558 | 29K |
| 5 | August 8, 2025 17:15 | August 8, 2025 18:00 | 45m | 1,445 | 723 |
| 6 | February 8, 2025 04:45 | February 8, 2025 07:15 | 2h 30m | 1,260 | 948 |
| 7 | July 26, 2025 13:00 | July 26, 2025 17:15 | 4h 15m | 854 | 976 |
| 8 | April 2, 2025 14:15 | April 2, 2025 23:45 | 9h 30m | 822 | 3,598 |
| 9 | October 7, 2025 01:45 | October 8, 2025 03:45 | 1d 2h | 537 | 5,277 |
| 10 | October 19, 2025 08:15 | October 20, 2025 02:45 | 18h 30m | 531 | 4,185 |
Outage episodes by size in 2025: 47 reached 100+ customers, 6 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 Isabella 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 |
|---|---|---|---|---|---|
| Consumers Energy Co - (MI) | 2024 | 8.4 hrs | 1.32 | 2.6 hrs | 0.88 |
| DTE Electric Company | 2024 | 8.0 hrs | 1.25 | 2.7 hrs | 0.94 |
| Tri-County Electric Coop (MI) | 2024 | 4.0 hrs | 1.00 | 1.8 hrs | 0.86 |
| Wolverine Power Supply Coop | - | - | - | - | - |
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 ÷ 36,507 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. Isabella County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Isabella 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/isabella-county