County annual report · FIPS 26139
2021 Ottawa County, MI Power Outage Report
In 2021, customers in Ottawa County, MI went without power for an average of 7.1 hours, a total of 854K customer-hours (Michigan average 26.6 hours). That ranks 69th worst of 83 Michigan counties and 1024th of 2,974 nationally.
Compared with MI, the US and 2020
Coverage line is EAGLE-I's share of Michigan customers tracked each year.
Biggest outages in Ottawa County, 2021
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | August 10, 2021 20:45 | August 17, 2021 02:00 | 6d 5h | 9,786 | 292K |
| 2 | December 15, 2021 07:30 | December 19, 2021 08:15 | 4d | 8,082 | 164K |
| 3 | December 11, 2021 00:30 | December 14, 2021 01:30 | 3d 1h | 6,222 | 118K |
| 4 | November 21, 2021 22:30 | November 24, 2021 04:30 | 2d 6h | 5,222 | 34K |
| 5 | June 15, 2021 10:30 | June 15, 2021 17:30 | 7h | 3,198 | 892 |
| 6 | July 16, 2021 23:15 | July 17, 2021 00:15 | 1h | 3,187 | 1,853 |
| 7 | July 8, 2021 09:45 | July 9, 2021 06:30 | 20h 45m | 2,473 | 8,903 |
| 8 | October 11, 2021 20:00 | October 13, 2021 06:30 | 1d 10h | 2,354 | 31K |
| 9 | March 2, 2021 02:15 | March 2, 2021 20:15 | 18h | 1,727 | 2,568 |
| 10 | May 8, 2021 06:15 | May 8, 2021 11:30 | 5h 15m | 1,586 | 7,543 |
Outage episodes by size in 2021: 120 reached 100+ customers, 20 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 Ottawa County reported on EIA Form 861 for 2021, 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) | 2021 | 15.2 hrs | 1.60 | 3.8 hrs | 1.05 |
| Great Lakes Energy Coop | 2021 | 20.4 hrs | 3.25 | 3.4 hrs | 1.71 |
| City of Holland | 2021 | 31 min | 0.49 | 31 min | 0.49 |
| City of Grand Haven - (MI) | 2021 | 2.8 hrs | 1.38 | 23 min | 0.19 |
| City of Zeeland - (MI) | 2021 | 4 min | 0.11 | 4 min | 0.11 |
| 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 95% of Michigan's customers in 2021; 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, 2021, 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/2021/michigan/ottawa-county