County annual report · FIPS 26057
2021 Gratiot County, MI Power Outage Report
In 2021, customers in Gratiot County, MI went without power for an average of 7.3 hours, a total of 153K customer-hours (Michigan average 26.6 hours). That ranks 68th worst of 83 Michigan counties and 1005th 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 Gratiot 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 24, 2021 22:00 | August 26, 2021 05:00 | 1d 7h | 2,431 | 17K |
| 2 | October 11, 2021 18:45 | October 11, 2021 21:30 | 2h 45m | 1,990 | 5,471 |
| 3 | May 28, 2021 16:00 | May 29, 2021 03:15 | 11h 15m | 1,790 | 4,559 |
| 4 | December 11, 2021 14:15 | December 14, 2021 23:15 | 3d 9h | 1,732 | 48K |
| 5 | September 7, 2021 17:45 | September 10, 2021 10:45 | 2d 17h | 1,296 | 24K |
| 6 | August 28, 2021 20:45 | August 30, 2021 10:00 | 1d 13h | 1,083 | 12K |
| 7 | November 21, 2021 23:45 | November 22, 2021 16:15 | 16h 30m | 735 | 3,219 |
| 8 | August 11, 2021 01:15 | August 14, 2021 02:45 | 3d 1h | 670 | 9,935 |
| 9 | November 14, 2021 16:30 | November 14, 2021 17:45 | 1h 15m | 650 | 652 |
| 10 | March 11, 2021 15:00 | March 12, 2021 02:00 | 11h | 499 | 1,964 |
Outage episodes by size in 2021: 32 reached 100+ customers, 6 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 Gratiot 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 |
| 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 |
| City of St Louis - (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 ÷ 21,004 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. Gratiot County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Gratiot 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/gratiot-county