County annual report · FIPS 26161
2022 Washtenaw County, MI Power Outage Report
In 2022, customers in Washtenaw County, MI went without power for an average of 5.7 hours, a total of 1.1M customer-hours (Michigan average 10.5 hours). That ranks 65th worst of 83 Michigan counties and 1260th of 2,976 nationally.
Compared with MI, the US and 2021
Coverage line is EAGLE-I's share of Michigan customers tracked each year.
Biggest outages in Washtenaw County, 2022
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, 2022 20:45 | September 8, 2022 07:30 | 10d 10h | 25,904 | 567K |
| 2 | April 14, 2022 07:45 | April 17, 2022 02:45 | 2d 19h | 5,600 | 39K |
| 3 | August 3, 2022 21:15 | August 6, 2022 19:15 | 2d 22h | 4,572 | 62K |
| 4 | November 5, 2022 16:45 | November 9, 2022 10:30 | 3d 17h | 4,074 | 67K |
| 5 | November 25, 2022 05:15 | November 25, 2022 07:45 | 2h 30m | 3,971 | 5,762 |
| 6 | December 3, 2022 02:00 | December 4, 2022 18:00 | 1d 16h | 3,775 | 17K |
| 7 | March 30, 2022 12:15 | March 30, 2022 20:45 | 8h 30m | 3,718 | 9,452 |
| 8 | June 19, 2022 23:15 | June 23, 2022 02:00 | 3d 2h | 3,675 | 9,792 |
| 9 | June 7, 2022 06:00 | June 8, 2022 13:45 | 1d 7h | 3,642 | 4,779 |
| 10 | July 19, 2022 13:30 | July 23, 2022 08:00 | 3d 18h | 3,512 | 19K |
Outage episodes by size in 2022: 156 reached 100+ customers, 40 reached 1,000+ customers, 1 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 2022, 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) | 2022 | 7.8 hrs | 1.29 | 3.0 hrs | 0.96 |
| DTE Electric Company | 2022 | 9.7 hrs | 1.25 | 2.4 hrs | 0.98 |
| 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 96% of Michigan's customers in 2022; 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, 2022, 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/2022/michigan/washtenaw-county