County annual report · FIPS 26045
2021 Eaton County, MI Power Outage Report
In 2021, customers in Eaton County, MI went without power for an average of 3.5 hours, a total of 177K customer-hours (Michigan average 26.6 hours). That ranks 77th worst of 83 Michigan counties and 1675th 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 Eaton 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 | September 7, 2021 21:30 | September 9, 2021 09:30 | 1d 12h | 2,347 | 22K |
| 2 | August 26, 2021 13:45 | August 26, 2021 15:00 | 1h 15m | 2,108 | 528 |
| 3 | December 11, 2021 12:30 | December 14, 2021 06:45 | 2d 18h | 1,926 | 31K |
| 4 | October 30, 2021 04:30 | October 30, 2021 13:15 | 8h 45m | 1,887 | 7,102 |
| 5 | June 21, 2021 01:15 | June 22, 2021 05:00 | 1d 3h | 1,696 | 12K |
| 6 | August 12, 2021 02:45 | August 16, 2021 00:45 | 3d 22h | 1,448 | 14K |
| 7 | June 26, 2021 17:15 | June 27, 2021 23:30 | 1d 6h | 1,228 | 7,298 |
| 8 | July 24, 2021 23:30 | July 25, 2021 20:30 | 21h | 1,059 | 5,939 |
| 9 | December 16, 2021 07:30 | December 17, 2021 16:30 | 1d 9h | 962 | 6,664 |
| 10 | August 11, 2021 03:15 | August 11, 2021 22:30 | 19h 15m | 843 | 9,133 |
Outage episodes by size in 2021: 57 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 Eaton 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 |
| Tri-County Electric Coop (MI) | 2021 | 6.3 hrs | 1.63 | 2.5 hrs | 1.12 |
| Wolverine Power Supply Coop | - | - | - | - | - |
| City of Lansing - (MI) | - | - | - | - | - |
| City of Eaton Rapids - (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 95% of Michigan's customers in 2021; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 50,376 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. Eaton County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Eaton 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/eaton-county