County annual report · FIPS 26147
2025 St. Clair County, MI Power Outage Report
In 2025, customers in St. Clair County, MI went without power for an average of 3.7 hours, a total of 268K customer-hours (Michigan average 12.9 hours). That ranks 75th worst of 83 Michigan counties and 1832nd of 3,000 nationally.
Compared with MI, the US and 2024
Coverage line is EAGLE-I's share of Michigan customers tracked each year.
Biggest outages in St. Clair County, 2025
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | May 1, 2025 12:15 | May 18, 2025 16:30 | 17d 4h | 2,759 | 49K |
| 2 | October 16, 2025 14:15 | October 23, 2025 19:15 | 7d 5h | 2,747 | 9,381 |
| 3 | March 31, 2025 00:00 | April 1, 2025 10:00 | 1d 10h | 2,585 | 23K |
| 4 | December 26, 2025 07:30 | December 31, 2025 01:15 | 4d 17h | 1,873 | 57K |
| 5 | July 30, 2025 20:45 | August 2, 2025 07:00 | 2d 10h | 1,663 | 4,746 |
| 6 | June 26, 2025 15:15 | June 29, 2025 08:30 | 2d 17h | 1,662 | 12K |
| 7 | June 20, 2025 12:45 | June 26, 2025 09:30 | 5d 20h | 1,505 | 18K |
| 8 | June 11, 2025 11:30 | June 14, 2025 02:15 | 2d 14h | 1,200 | 12K |
| 9 | November 9, 2025 09:45 | November 10, 2025 20:30 | 1d 10h | 1,057 | 2,126 |
| 10 | December 20, 2025 20:15 | December 22, 2025 10:15 | 1d 14h | 1,049 | 3,780 |
Outage episodes by size in 2025: 41 reached 100+ customers, 11 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 St. Clair County reported on EIA Form 861 for 2025, 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 | 2024 | 8.0 hrs | 1.25 | 2.7 hrs | 0.94 |
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 2025; 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, 2025, 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/2025/michigan/st-clair-county