County annual report · FIPS 26017
2021 Bay County, MI Power Outage Report
In 2021, customers in Bay County, MI went without power for an average of 4.9 hours, a total of 321K customer-hours (Michigan average 26.6 hours). That ranks 72nd worst of 83 Michigan counties and 1357th 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 Bay 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 24, 2021 21:15 | August 26, 2021 10:15 | 1d 13h | 3,837 | 45K |
| 2 | December 11, 2021 15:00 | December 15, 2021 00:30 | 3d 9h | 3,794 | 109K |
| 3 | September 25, 2021 06:15 | September 25, 2021 10:00 | 3h 45m | 2,935 | 9,189 |
| 4 | August 11, 2021 04:30 | August 11, 2021 22:30 | 18h | 2,223 | 31K |
| 5 | September 23, 2021 03:15 | September 24, 2021 18:00 | 1d 14h | 2,081 | 12K |
| 6 | August 10, 2021 12:30 | August 10, 2021 14:45 | 2h 15m | 1,765 | 3,088 |
| 7 | March 11, 2021 14:45 | March 12, 2021 20:00 | 1d 5h | 1,706 | 7,514 |
| 8 | September 7, 2021 19:15 | September 9, 2021 23:30 | 2d 4h | 1,311 | 31K |
| 9 | August 12, 2021 15:00 | August 14, 2021 23:45 | 2d 8h | 1,175 | 23K |
| 10 | December 16, 2021 17:30 | December 17, 2021 22:15 | 1d 4h | 748 | 7,985 |
Outage episodes by size in 2021: 51 reached 100+ customers, 9 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 Bay 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 |
|---|---|---|---|---|---|
| Consumers Energy Co - (MI) | 2021 | 15.2 hrs | 1.60 | 3.8 hrs | 1.05 |
| DTE Electric Company | 2021 | 15.5 hrs | 1.58 | 2.3 hrs | 0.92 |
| City of Bay City - (MI) | 2021 | 81 min | 0.82 | 81 min | 0.82 |
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 ÷ 66,162 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. Bay County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Bay 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/bay-county