County annual report · FIPS 26099
2021 Macomb County, MI Power Outage Report
In 2021, customers in Macomb County, MI went without power for an average of 20.6 hours, a total of 8.3M customer-hours (Michigan average 26.6 hours). That ranks 45th worst of 83 Michigan counties and 419th of 2,974 nationally.
Compared with MI, the US and 2020
Coverage line is EAGLE-I's share of Michigan customers tracked each year.
Biggest outages in Macomb County, 2021
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 11, 2021 22:15 | October 21, 2021 01:45 | 70d 3h | 64,068 | 5.0M |
| 2 | June 18, 2021 11:00 | August 11, 2021 20:45 | 54d 9h | 47,664 | 2.4M |
| 3 | December 10, 2021 14:45 | December 29, 2021 07:30 | 18d 16h | 17,183 | 499K |
| 4 | March 8, 2021 14:45 | March 9, 2021 06:45 | 16h | 11,238 | 14K |
| 5 | April 20, 2021 11:30 | April 24, 2021 08:00 | 3d 20h | 5,590 | 19K |
| 6 | April 29, 2021 13:30 | May 5, 2021 04:00 | 5d 14h | 5,183 | 32K |
| 7 | March 26, 2021 03:45 | April 1, 2021 02:30 | 5d 22h | 5,111 | 27K |
| 8 | April 9, 2021 05:45 | April 12, 2021 09:30 | 3d 3h | 3,950 | 11K |
| 9 | November 11, 2021 12:45 | November 21, 2021 03:15 | 9d 14h | 3,934 | 76K |
| 10 | March 11, 2021 14:15 | March 12, 2021 07:15 | 17h | 3,916 | 14K |
Outage episodes by size in 2021: 80 reached 100+ customers, 23 reached 1,000+ customers, 4 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 Macomb County reported on EIA Form 861 for 2021, 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 |
|---|---|---|---|---|---|
| DTE Electric Company | 2021 | 15.5 hrs | 1.58 | 2.3 hrs | 0.92 |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about 95% of Michigan's customers in 2021; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 404,553 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. Macomb County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Macomb County, MI annual power outage report, 2021, 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/2021/michigan/macomb-county