County annual report · FIPS 26161
2025 Washtenaw County, MI Power Outage Report
In 2025, customers in Washtenaw County, MI went without power for an average of 2.0 hours, a total of 396K customer-hours (Michigan average 12.9 hours). That ranks 83rd worst of 83 Michigan counties and 2411th of 3,000 nationally.
Compared with MI, the US and 2024
Coverage line is EAGLE-I's share of Michigan customers tracked each year.
Biggest outages in Washtenaw County, 2025
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | March 30, 2025 22:45 | April 4, 2025 23:15 | 5d | 4,277 | 110K |
| 2 | June 16, 2025 11:00 | June 20, 2025 05:30 | 3d 18h | 4,126 | 18K |
| 3 | November 6, 2025 08:15 | November 7, 2025 02:15 | 18h | 2,117 | 1,134 |
| 4 | June 4, 2025 15:45 | June 10, 2025 07:30 | 5d 15h | 1,980 | 2,992 |
| 5 | January 1, 2025 00:00 | January 8, 2025 08:15 | 7d 8h | 1,780 | 4,209 |
| 6 | July 9, 2025 07:30 | July 15, 2025 09:45 | 6d 2h | 1,663 | 8,366 |
| 7 | July 4, 2025 18:45 | July 7, 2025 10:15 | 2d 15h | 1,547 | 5,238 |
| 8 | March 15, 2025 07:00 | March 17, 2025 04:15 | 1d 21h | 1,496 | 9,819 |
| 9 | May 15, 2025 15:30 | May 20, 2025 05:30 | 4d 14h | 1,442 | 20K |
| 10 | August 12, 2025 16:15 | August 18, 2025 04:15 | 5d 12h | 1,416 | 7,808 |
Outage episodes by size in 2025: 97 reached 100+ customers, 17 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 Washtenaw County reported on EIA Form 861 for 2025, 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) | 2024 | 8.4 hrs | 1.32 | 2.6 hrs | 0.88 |
| DTE Electric Company | 2024 | 8.0 hrs | 1.25 | 2.7 hrs | 0.94 |
| Village of Clinton - (MI) | - | - | - | - | - |
| Village of Chelsea - (MI) | - | - | - | - | - |
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 2025; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 195,553 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. Washtenaw County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Washtenaw County, MI annual power outage report, 2025, 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/2025/michigan/washtenaw-county