County annual report · FIPS 26069
2025 Iosco County, MI Power Outage Report
In 2025, customers in Iosco County, MI went without power for an average of 23.2 hours, a total of 333K customer-hours (Michigan average 12.9 hours). That ranks 28th worst of 83 Michigan counties and 284th 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 Iosco 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 | April 29, 2025 16:00 | May 1, 2025 08:30 | 1d 16h | 8,777 | 121K |
| 2 | July 24, 2025 18:30 | July 26, 2025 01:45 | 1d 7h | 6,197 | 53K |
| 3 | May 18, 2025 04:00 | May 18, 2025 06:15 | 2h 15m | 2,799 | 5,220 |
| 4 | January 22, 2025 19:45 | January 22, 2025 22:15 | 2h 30m | 2,624 | 3,280 |
| 5 | July 6, 2025 04:00 | July 6, 2025 04:15 | 15m | 2,452 | 613 |
| 6 | May 22, 2025 03:00 | May 22, 2025 18:45 | 15h 45m | 2,439 | 26K |
| 7 | March 29, 2025 14:30 | April 3, 2025 12:15 | 4d 21h | 2,137 | 47K |
| 8 | December 21, 2025 01:00 | December 21, 2025 10:00 | 9h | 1,275 | 5,066 |
| 9 | November 30, 2025 05:00 | November 30, 2025 19:15 | 14h 15m | 1,030 | 7,434 |
| 10 | July 23, 2025 19:00 | July 23, 2025 21:30 | 2h 30m | 917 | 1,022 |
Outage episodes by size in 2025: 51 reached 100+ customers, 9 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 Iosco 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 |
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 ÷ 14,310 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. Iosco County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Iosco 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/iosco-county