County annual report · FIPS 26151
2021 Sanilac County, MI Power Outage Report
In 2021, customers in Sanilac County, MI went without power for an average of 61.9 hours, a total of 798K customer-hours (Michigan average 26.6 hours). That ranks 9th worst of 83 Michigan counties and 137th 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 Sanilac 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 22, 2021 10:15 | October 21, 2021 01:45 | 28d 15h | 9,280 | 462K |
| 2 | December 11, 2021 13:30 | December 16, 2021 09:15 | 4d 19h | 6,864 | 149K |
| 3 | November 30, 2021 17:30 | December 1, 2021 03:00 | 9h 30m | 3,351 | 2,546 |
| 4 | August 11, 2021 22:15 | August 17, 2021 17:15 | 5d 19h | 2,696 | 61K |
| 5 | March 24, 2021 14:00 | March 25, 2021 03:00 | 13h | 2,328 | 3,544 |
| 6 | August 25, 2021 08:15 | September 1, 2021 23:30 | 7d 15h | 2,281 | 28K |
| 7 | March 28, 2021 18:30 | March 28, 2021 21:15 | 2h 45m | 1,439 | 1,412 |
| 8 | August 17, 2021 20:00 | August 18, 2021 10:15 | 14h 15m | 1,261 | 2,757 |
| 9 | August 7, 2021 00:45 | August 7, 2021 05:00 | 4h 15m | 1,220 | 1,041 |
| 10 | June 17, 2021 22:45 | June 19, 2021 00:30 | 1d 1h | 1,180 | 8,044 |
Outage episodes by size in 2021: 39 reached 100+ customers, 11 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 Sanilac 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 |
|---|---|---|---|---|---|
| DTE Electric Company | 2021 | 15.5 hrs | 1.58 | 2.3 hrs | 0.92 |
| Thumb Electric Coop of Mich | - | - | - | - | - |
| City of Croswell - (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 ÷ 12,899 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. Sanilac County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Sanilac 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/sanilac-county