County annual report · FIPS 26105
2018 Mason County, MI Power Outage Report
In 2018, customers in Mason County, MI went without power for an average of 15.5 hours, a total of 293K customer-hours (Michigan average 10.0 hours). That ranks 17th worst of 80 Michigan counties and 354th of 2,798 nationally.
Compared with MI, the US and 2017
Coverage line is EAGLE-I's share of Michigan customers tracked each year.
Biggest outages in Mason County, 2018
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 28, 2018 02:00 | September 1, 2018 23:00 | 4d 21h | 7,525 | 263K |
| 2 | October 4, 2018 00:45 | October 4, 2018 08:45 | 8h | 1,005 | 1,717 |
| 3 | June 16, 2018 03:00 | June 16, 2018 08:30 | 5h 30m | 919 | 2,301 |
| 4 | July 20, 2018 13:45 | July 20, 2018 17:45 | 4h | 891 | 987 |
| 5 | August 26, 2018 23:15 | August 27, 2018 12:15 | 13h | 881 | 2,395 |
| 6 | August 25, 2018 21:30 | August 26, 2018 02:30 | 5h | 793 | 1,204 |
| 7 | October 20, 2018 20:30 | October 21, 2018 22:15 | 1d 1h | 517 | 1,450 |
| 8 | September 7, 2018 12:15 | September 7, 2018 13:00 | 45m | 404 | 102 |
| 9 | September 7, 2018 13:45 | September 7, 2018 15:30 | 1h 45m | 403 | 102 |
| 10 | March 1, 2018 22:00 | March 1, 2018 23:00 | 1h | 390 | 321 |
Outage episodes by size in 2018: 30 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 2018, 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) | 2018 | 6.8 hrs | 1.29 | 3.3 hrs | 1.02 |
| Great Lakes Energy Coop | 2018 | 14.6 hrs | 2.44 | 2.7 hrs | 1.41 |
| 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 91% of Michigan's customers in 2018; 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, 2018, 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/2018/michigan/mason-county