County annual report · FIPS 26097
2021 Mackinac County, MI Power Outage Report
In 2021, customers in Mackinac County, MI went without power for an average of 28.1 hours, a total of 246K customer-hours (Michigan average 26.6 hours). That ranks 33rd worst of 83 Michigan counties and 317th 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 Mackinac 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 16, 2021 04:45 | December 23, 2021 18:00 | 7d 13h | 4,474 | 118K |
| 2 | June 10, 2021 17:00 | June 11, 2021 16:00 | 23h | 3,367 | 2,334 |
| 3 | November 11, 2021 10:15 | November 14, 2021 00:15 | 2d 14h | 2,823 | 19K |
| 4 | August 11, 2021 04:00 | August 13, 2021 20:00 | 2d 16h | 2,013 | 23K |
| 5 | August 11, 2021 01:45 | August 11, 2021 02:30 | 45m | 1,447 | 725 |
| 6 | January 6, 2021 21:30 | January 6, 2021 22:15 | 45m | 1,442 | 1,081 |
| 7 | March 11, 2021 09:30 | March 12, 2021 20:00 | 1d 10h | 1,194 | 8,297 |
| 8 | December 11, 2021 11:30 | December 15, 2021 14:15 | 4d 2h | 1,018 | 17K |
| 9 | May 1, 2021 16:30 | May 2, 2021 03:00 | 10h 30m | 791 | 2,954 |
| 10 | September 13, 2021 08:15 | September 13, 2021 12:30 | 4h 15m | 790 | 1,937 |
Outage episodes by size in 2021: 49 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 Mackinac 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 |
|---|---|---|---|---|---|
| Presque Isle Elec & Gas Coop | 2015 | 22.8 hrs | 2.30 | 3.8 hrs | 1.32 |
| Cloverland Electric Co-op | 2021 | 17.0 hrs | 3.87 | 4.8 hrs | 2.39 |
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 ÷ 8,757 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. Mackinac County has data for 2019–2025.
Cite this report
MassOutage (massoutage.com), Mackinac 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/mackinac-county