County annual report · FIPS 26117
2021 Montcalm County, MI Power Outage Report
In 2021, customers in Montcalm County, MI went without power for an average of 21.0 hours, a total of 714K customer-hours (Michigan average 26.6 hours). That ranks 43rd worst of 83 Michigan counties and 412th 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 Montcalm 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 11, 2021 12:15 | December 15, 2021 01:15 | 3d 13h | 9,757 | 195K |
| 2 | August 11, 2021 02:45 | August 16, 2021 22:15 | 5d 19h | 7,763 | 249K |
| 3 | August 24, 2021 13:45 | August 26, 2021 21:45 | 2d 8h | 4,411 | 74K |
| 4 | June 26, 2021 11:45 | June 27, 2021 14:15 | 1d 2h | 2,577 | 11K |
| 5 | December 16, 2021 06:15 | December 18, 2021 19:30 | 2d 13h | 2,228 | 47K |
| 6 | September 7, 2021 18:00 | September 9, 2021 19:00 | 2d 1h | 2,189 | 30K |
| 7 | November 21, 2021 23:00 | November 23, 2021 03:45 | 1d 4h | 1,316 | 15K |
| 8 | June 25, 2021 12:45 | June 25, 2021 22:15 | 9h 30m | 1,313 | 5,810 |
| 9 | June 11, 2021 20:45 | June 14, 2021 16:45 | 2d 20h | 965 | 15K |
| 10 | June 29, 2021 05:15 | June 29, 2021 20:45 | 15h 30m | 892 | 4,337 |
Outage episodes by size in 2021: 77 reached 100+ customers, 8 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 Montcalm 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 |
| DTE Electric Company | 2021 | 15.5 hrs | 1.58 | 2.3 hrs | 0.92 |
| Tri-County Electric Coop (MI) | 2021 | 6.3 hrs | 1.63 | 2.5 hrs | 1.12 |
| 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 ÷ 33,946 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. Montcalm County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Montcalm 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/montcalm-county