County annual report · FIPS 26157
2021 Tuscola County, MI Power Outage Report
In 2021, customers in Tuscola County, MI went without power for an average of 32.1 hours, a total of 535K customer-hours (Michigan average 26.6 hours). That ranks 29th worst of 83 Michigan counties and 283rd 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 Tuscola 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 13:45 | December 17, 2021 21:00 | 6d 7h | 6,138 | 160K |
| 2 | September 7, 2021 12:15 | September 10, 2021 08:30 | 2d 20h | 4,758 | 82K |
| 3 | September 22, 2021 20:00 | September 28, 2021 05:30 | 5d 9h | 3,131 | 152K |
| 4 | November 11, 2021 22:15 | November 14, 2021 23:45 | 3d 1h | 3,026 | 26K |
| 5 | June 2, 2021 17:45 | June 2, 2021 21:45 | 4h | 2,189 | 4,180 |
| 6 | June 22, 2021 18:00 | June 23, 2021 17:30 | 23h 30m | 2,155 | 4,254 |
| 7 | August 24, 2021 23:45 | August 28, 2021 00:15 | 3d | 1,382 | 16K |
| 8 | December 6, 2021 14:15 | December 8, 2021 01:45 | 1d 11h | 1,255 | 6,862 |
| 9 | December 10, 2021 16:30 | December 10, 2021 19:15 | 2h 45m | 1,244 | 343 |
| 10 | March 11, 2021 16:00 | March 12, 2021 21:15 | 1d 5h | 1,097 | 2,156 |
Outage episodes by size in 2021: 47 reached 100+ customers, 13 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 Tuscola 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 |
| Thumb Electric Coop of Mich | - | - | - | - | - |
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 ÷ 16,639 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. Tuscola County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Tuscola 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/tuscola-county