County annual report · FIPS 26105
2023 Mason County, MI Power Outage Report
In 2023, customers in Mason County, MI went without power for an average of 4.8 hours, a total of 91K customer-hours (Michigan average 26.5 hours). That ranks 61st worst of 83 Michigan counties and 1505th of 2,977 nationally.
Compared with MI, the US and 2022
Coverage line is EAGLE-I's share of Michigan customers tracked each year.
Biggest outages in Mason County, 2023
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | July 28, 2023 00:00 | July 28, 2023 09:15 | 9h 15m | 6,240 | 36K |
| 2 | February 27, 2023 16:30 | March 1, 2023 06:45 | 1d 14h | 1,992 | 19K |
| 3 | August 2, 2023 12:15 | August 2, 2023 19:45 | 7h 30m | 946 | 259 |
| 4 | October 28, 2023 07:30 | October 28, 2023 15:45 | 8h 15m | 717 | 4,483 |
| 5 | March 31, 2023 17:45 | March 31, 2023 19:00 | 1h 15m | 693 | 347 |
| 6 | August 1, 2023 14:00 | August 1, 2023 15:15 | 1h 15m | 647 | 808 |
| 7 | November 29, 2023 17:00 | November 29, 2023 17:15 | 15m | 508 | 127 |
| 8 | December 4, 2023 13:30 | December 4, 2023 13:45 | 15m | 508 | 127 |
| 9 | August 19, 2023 18:45 | August 20, 2023 02:45 | 8h | 492 | 1,850 |
| 10 | June 22, 2023 19:00 | June 22, 2023 21:00 | 2h | 477 | 954 |
Outage episodes by size in 2023: 46 reached 100+ customers, 2 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 Mason County reported on EIA Form 861 for 2023, 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) | 2023 | 15.2 hrs | 1.37 | 2.9 hrs | 0.96 |
| Great Lakes Energy Coop | 2023 | 4.4 hrs | 1.69 | 3.4 hrs | 1.56 |
| Wolverine Power Supply Coop | - | - | - | - | - |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about n/a of Michigan's customers in 2023; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 18,909 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. Mason County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Mason County, MI annual power outage report, 2023, 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/2023/michigan/mason-county