County annual report · FIPS 26155
2020 Shiawassee County, MI Power Outage Report
In 2020, customers in Shiawassee County, MI went without power for an average of 2.9 hours, a total of 120K customer-hours (Michigan average 9.8 hours). That ranks 76th worst of 83 Michigan counties and 1904th of 3,019 nationally.
Compared with MI, the US and 2019
Coverage line is EAGLE-I's share of Michigan customers tracked each year.
Biggest outages in Shiawassee County, 2020
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 11, 2020 11:30 | January 11, 2020 17:45 | 6h 15m | 3,644 | 5,853 |
| 2 | October 23, 2020 18:15 | October 25, 2020 03:00 | 1d 8h | 2,419 | 26K |
| 3 | June 26, 2020 20:00 | June 27, 2020 22:45 | 1d 2h | 1,236 | 3,256 |
| 4 | June 23, 2020 12:15 | June 24, 2020 01:00 | 12h 45m | 941 | 1,996 |
| 5 | August 29, 2020 14:00 | August 29, 2020 23:30 | 9h 30m | 931 | 849 |
| 6 | September 20, 2020 03:00 | September 20, 2020 09:15 | 6h 15m | 912 | 2,741 |
| 7 | July 7, 2020 13:00 | July 7, 2020 16:00 | 3h | 865 | 650 |
| 8 | June 3, 2020 05:30 | June 4, 2020 00:30 | 19h | 734 | 6,851 |
| 9 | July 7, 2020 20:00 | July 8, 2020 05:00 | 9h | 714 | 2,398 |
| 10 | August 3, 2020 14:00 | August 3, 2020 21:00 | 7h | 690 | 3,250 |
Outage episodes by size in 2020: 42 reached 100+ customers, 3 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 Shiawassee County reported on EIA Form 861 for 2020, 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) | 2020 | 8.5 hrs | 1.35 | 3.2 hrs | 1.03 |
| DTE Electric Company | 2020 | 5.9 hrs | 1.29 | 2.4 hrs | 1.01 |
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 2020; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 41,361 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. Shiawassee County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Shiawassee County, MI annual power outage report, 2020, 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/2020/michigan/shiawassee-county