County annual report · FIPS 26131
2023 Ontonagon County, MI Power Outage Report
In 2023, customers in Ontonagon County, MI went without power for an average of 4.7 hours, a total of 20K customer-hours (Michigan average 26.5 hours). That ranks 63rd worst of 83 Michigan counties and 1535th 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 Ontonagon 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 | April 30, 2023 08:15 | April 30, 2023 20:45 | 12h 30m | 2,518 | 2,275 |
| 2 | July 26, 2023 15:00 | July 26, 2023 16:00 | 1h | 2,501 | 2,501 |
| 3 | July 27, 2023 23:30 | July 29, 2023 11:15 | 1d 11h | 1,885 | 5,696 |
| 4 | August 26, 2023 17:15 | August 26, 2023 19:00 | 1h 45m | 1,277 | 1,920 |
| 5 | May 6, 2023 19:15 | May 6, 2023 23:00 | 3h 45m | 663 | 2,486 |
| 6 | November 6, 2023 12:30 | November 6, 2023 13:45 | 1h 15m | 435 | 514 |
| 7 | November 9, 2023 08:00 | November 9, 2023 10:30 | 2h 30m | 435 | 569 |
| 8 | March 26, 2023 07:30 | March 26, 2023 12:30 | 5h | 240 | 1,197 |
| 9 | October 27, 2023 19:15 | October 27, 2023 22:00 | 2h 45m | 144 | 394 |
| 10 | May 21, 2023 11:45 | May 21, 2023 13:00 | 1h 15m | 142 | 144 |
Outage episodes by size in 2023: 12 reached 100+ customers, 4 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 Ontonagon 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 |
|---|---|---|---|---|---|
| Northern States Power Co | 2023 | 3.5 hrs | 1.26 | 2.1 hrs | 1.09 |
| Upper Peninsula Power Company | 2023 | 7.1 hrs | 1.58 | 2.3 hrs | 0.98 |
| Upper Michigan Energy Resources Corp. | 2023 | 6.1 hrs | 1.32 | 3.1 hrs | 1.01 |
| Ontonagon County R E A | - | - | - | - | - |
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 ÷ 4,246 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. Ontonagon County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Ontonagon 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/ontonagon-county