County annual report · FIPS 26067
2025 Ionia County, MI Power Outage Report
In 2025, customers in Ionia County, MI went without power for an average of 11.0 hours, a total of 388K customer-hours (Michigan average 12.9 hours). That ranks 50th worst of 83 Michigan counties and 725th 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 Ionia 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 20:15 | April 4, 2025 16:30 | 4d 20h | 4,293 | 119K |
| 2 | May 16, 2025 03:15 | May 20, 2025 04:15 | 4d 1h | 4,234 | 79K |
| 3 | April 28, 2025 08:30 | April 28, 2025 13:30 | 5h | 3,786 | 10K |
| 4 | March 15, 2025 09:30 | March 16, 2025 20:15 | 1d 10h | 3,547 | 13K |
| 5 | October 14, 2025 01:00 | October 14, 2025 06:30 | 5h 30m | 3,204 | 18K |
| 6 | June 1, 2025 03:15 | June 1, 2025 11:45 | 8h 30m | 2,693 | 19K |
| 7 | June 26, 2025 12:30 | June 28, 2025 05:00 | 1d 16h | 1,717 | 17K |
| 8 | June 22, 2025 11:45 | June 22, 2025 19:15 | 7h 30m | 1,427 | 2,758 |
| 9 | December 29, 2025 03:00 | December 31, 2025 18:45 | 2d 15h | 1,218 | 32K |
| 10 | October 19, 2025 04:15 | October 19, 2025 13:45 | 9h 30m | 1,043 | 3,202 |
Outage episodes by size in 2025: 62 reached 100+ customers, 13 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 Ionia 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 |
| Tri-County Electric Coop (MI) | 2024 | 4.0 hrs | 1.00 | 1.8 hrs | 0.86 |
| Wolverine Power Supply Coop | - | - | - | - | - |
| City of Portland - (MI) | - | - | - | - | - |
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 ÷ 35,242 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. Ionia County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Ionia 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/ionia-county