County annual report · FIPS 26121
2021 Muskegon County, MI Power Outage Report
In 2021, customers in Muskegon County, MI went without power for an average of 8.1 hours, a total of 837K customer-hours (Michigan average 26.6 hours). That ranks 65th worst of 83 Michigan counties and 933rd 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 Muskegon 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 | December 15, 2021 21:15 | December 20, 2021 08:00 | 4d 10h | 11,093 | 224K |
| 2 | August 10, 2021 07:30 | August 16, 2021 03:45 | 5d 20h | 9,936 | 246K |
| 3 | December 11, 2021 11:45 | December 14, 2021 01:00 | 2d 13h | 4,853 | 64K |
| 4 | September 7, 2021 14:15 | September 9, 2021 21:45 | 2d 7h | 4,613 | 79K |
| 5 | August 8, 2021 03:45 | August 9, 2021 08:45 | 1d 5h | 2,907 | 15K |
| 6 | August 24, 2021 12:00 | August 26, 2021 01:30 | 1d 13h | 2,858 | 8,800 |
| 7 | December 25, 2021 05:00 | December 25, 2021 09:30 | 4h 30m | 2,375 | 7,631 |
| 8 | June 24, 2021 06:45 | June 25, 2021 23:45 | 1d 17h | 2,189 | 9,248 |
| 9 | February 26, 2021 12:30 | February 26, 2021 14:15 | 1h 45m | 2,181 | 3,272 |
| 10 | July 13, 2021 11:30 | July 13, 2021 13:45 | 2h 15m | 2,118 | 1,060 |
Outage episodes by size in 2021: 115 reached 100+ customers, 22 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 Muskegon 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 |
| 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 ÷ 103,718 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. Muskegon County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Muskegon 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/muskegon-county