County annual report · FIPS 26147
2023 St. Clair County, MI Power Outage Report
In 2023, customers in St. Clair County, MI went without power for an average of 17.4 hours, a total of 1.2M customer-hours (Michigan average 26.5 hours). That ranks 22nd worst of 83 Michigan counties and 487th of 2,977 nationally.
Compared with MI, the US and 2022
Coverage line is EAGLE-I's share of Michigan customers tracked each year.
Biggest outages in St. Clair County, 2023
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | February 20, 2023 18:30 | March 11, 2023 11:15 | 18d 16h | 13,776 | 486K |
| 2 | July 17, 2023 12:15 | August 9, 2023 15:00 | 23d 2h | 12,778 | 470K |
| 3 | July 9, 2023 10:15 | July 17, 2023 10:15 | 8d | 3,241 | 62K |
| 4 | February 8, 2023 15:15 | February 9, 2023 05:45 | 14h 30m | 3,115 | 3,929 |
| 5 | August 23, 2023 14:30 | August 31, 2023 03:00 | 7d 12h | 2,558 | 33K |
| 6 | March 24, 2023 15:30 | March 28, 2023 09:15 | 3d 17h | 2,510 | 16K |
| 7 | April 12, 2023 04:45 | April 24, 2023 10:30 | 12d 5h | 2,194 | 15K |
| 8 | January 17, 2023 01:45 | January 17, 2023 08:30 | 6h 45m | 1,624 | 444 |
| 9 | January 25, 2023 18:15 | January 28, 2023 19:00 | 3d | 1,407 | 16K |
| 10 | February 15, 2023 14:15 | February 20, 2023 08:45 | 4d 18h | 1,397 | 18K |
Outage episodes by size in 2023: 43 reached 100+ customers, 14 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 St. Clair County reported on EIA Form 861 for 2023, 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 | 2023 | 25.7 hrs | 1.72 | 2.6 hrs | 0.85 |
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 2023; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 71,469 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. St. Clair County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), St. Clair County, MI annual power outage report, 2023, 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/2023/michigan/st-clair-county