County annual report · FIPS 26139
2025 Ottawa County, MI Power Outage Report
In 2025, customers in Ottawa County, MI went without power for an average of 9.0 hours, a total of 1.1M customer-hours (Michigan average 12.9 hours). That ranks 53rd worst of 83 Michigan counties and 892nd 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 Ottawa 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 | May 15, 2025 22:45 | May 20, 2025 07:45 | 4d 9h | 15,748 | 588K |
| 2 | March 30, 2025 04:30 | April 5, 2025 08:45 | 6d 4h | 7,133 | 127K |
| 3 | November 21, 2025 22:30 | November 22, 2025 05:15 | 6h 45m | 6,421 | 2,816 |
| 4 | May 31, 2025 11:00 | May 31, 2025 16:15 | 5h 15m | 6,393 | 4,810 |
| 5 | April 9, 2025 22:00 | April 9, 2025 23:00 | 1h | 5,639 | 2,601 |
| 6 | November 26, 2025 06:45 | November 28, 2025 08:00 | 2d 1h | 5,590 | 92K |
| 7 | April 28, 2025 10:45 | May 5, 2025 16:15 | 7d 5h | 5,488 | 5,829 |
| 8 | June 9, 2025 21:30 | June 11, 2025 05:15 | 1d 7h | 3,232 | 1,844 |
| 9 | July 17, 2025 05:15 | July 17, 2025 15:30 | 10h 15m | 2,542 | 5,991 |
| 10 | August 4, 2025 12:45 | August 5, 2025 02:00 | 13h 15m | 2,516 | 693 |
Outage episodes by size in 2025: 131 reached 100+ customers, 28 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 Ottawa 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 |
| Great Lakes Energy Coop | 2024 | 8.1 hrs | 2.83 | 4.3 hrs | 2.35 |
| City of Holland | 2024 | 5.7 hrs | 0.62 | 40 min | 0.43 |
| City of Grand Haven - (MI) | 2024 | 4.0 hrs | 2.47 | 29 min | 0.26 |
| City of Zeeland - (MI) | 2024 | 5 min | 0.13 | 5 min | 0.13 |
| 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 ÷ 120,140 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. Ottawa County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Ottawa 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/ottawa-county