County annual report · FIPS 26155
2023 Shiawassee County, MI Power Outage Report
In 2023, customers in Shiawassee County, MI went without power for an average of 8.8 hours, a total of 365K customer-hours (Michigan average 26.5 hours). That ranks 35th worst of 83 Michigan counties and 937th 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 Shiawassee 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 | August 25, 2023 01:15 | August 30, 2023 06:15 | 5d 5h | 7,638 | 233K |
| 2 | July 13, 2023 02:00 | July 14, 2023 01:30 | 23h 30m | 2,271 | 21K |
| 3 | August 17, 2023 13:00 | August 17, 2023 13:15 | 15m | 2,024 | 506 |
| 4 | July 20, 2023 18:15 | July 22, 2023 13:30 | 1d 19h | 1,701 | 25K |
| 5 | July 1, 2023 23:00 | July 3, 2023 00:30 | 1d 1h | 1,215 | 8,414 |
| 6 | November 13, 2023 18:00 | November 13, 2023 18:30 | 30m | 1,135 | 568 |
| 7 | September 5, 2023 04:30 | September 5, 2023 10:30 | 6h | 963 | 2,169 |
| 8 | July 29, 2023 06:00 | July 29, 2023 18:15 | 12h 15m | 924 | 2,009 |
| 9 | April 30, 2023 04:00 | April 30, 2023 09:00 | 5h | 893 | 4,465 |
| 10 | August 11, 2023 22:30 | August 13, 2023 04:30 | 1d 6h | 750 | 9,614 |
Outage episodes by size in 2023: 46 reached 100+ customers, 6 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 Shiawassee 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 |
| DTE Electric Company | 2023 | 25.7 hrs | 1.72 | 2.6 hrs | 0.85 |
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 ÷ 41,361 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. Shiawassee County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Shiawassee 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/shiawassee-county