County annual report · FIPS 26161
2024 Washtenaw County, MI Power Outage Report
In 2024, customers in Washtenaw County, MI went without power for an average of 4.9 hours, a total of 952K customer-hours (Michigan average 8.5 hours). That ranks 63rd worst of 83 Michigan counties and 1640th of 2,990 nationally.
Compared with MI, the US and 2023
Coverage line is EAGLE-I's share of Michigan customers tracked each year.
Biggest outages in Washtenaw County, 2024
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | January 12, 2024 14:45 | January 21, 2024 04:15 | 8d 13h | 10,855 | 300K |
| 2 | August 22, 2024 12:45 | September 2, 2024 00:15 | 10d 11h | 10,735 | 224K |
| 3 | June 16, 2024 11:00 | June 23, 2024 00:15 | 6d 13h | 6,137 | 104K |
| 4 | November 20, 2024 11:00 | December 6, 2024 02:15 | 15d 15h | 2,172 | 13K |
| 5 | July 8, 2024 02:00 | July 12, 2024 11:00 | 4d 9h | 1,934 | 26K |
| 6 | September 3, 2024 04:15 | September 5, 2024 06:45 | 2d 2h | 1,730 | 3,394 |
| 7 | March 26, 2024 10:45 | March 27, 2024 21:15 | 1d 10h | 1,596 | 9,957 |
| 8 | October 12, 2024 13:45 | October 14, 2024 03:00 | 1d 13h | 1,317 | 11K |
| 9 | June 23, 2024 02:30 | June 25, 2024 08:15 | 2d 5h | 1,311 | 10K |
| 10 | April 11, 2024 04:30 | April 15, 2024 03:15 | 3d 22h | 1,305 | 19K |
Outage episodes by size in 2024: 91 reached 100+ customers, 19 reached 1,000+ customers, 2 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 2024, 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 2024; 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, 2024, 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/2024/michigan/washtenaw-county