County annual report · FIPS 26147
2017 St. Clair County, MI Power Outage Report
In 2017, customers in St. Clair County, MI went without power for an average of 4.7 hours, a total of 334K customer-hours (Michigan average 6.0 hours). That ranks 45th worst of 80 Michigan counties and 1006th of 2,786 nationally.
Compared with MI, the US and 2016
Coverage line is EAGLE-I's share of Michigan customers tracked each year.
Biggest outages in St. Clair County, 2017
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | April 6, 2017 07:15 | April 12, 2017 10:30 | 6d 3h | 5,213 | 156K |
| 2 | October 1, 2017 12:45 | October 1, 2017 19:30 | 6h 45m | 4,734 | 8,521 |
| 3 | October 15, 2017 11:00 | October 18, 2017 18:45 | 3d 7h | 2,332 | 23K |
| 4 | June 26, 2017 10:45 | June 27, 2017 11:15 | 1d | 2,154 | 8,156 |
| 5 | October 2, 2017 11:30 | October 5, 2017 11:30 | 3d | 2,150 | 6,413 |
| 6 | October 7, 2017 13:15 | October 9, 2017 09:30 | 1d 20h | 1,850 | 3,335 |
| 7 | October 13, 2017 09:30 | October 13, 2017 17:30 | 8h | 1,675 | 6,291 |
| 8 | June 21, 2017 10:15 | June 22, 2017 01:45 | 15h 30m | 1,650 | 1,314 |
| 9 | October 11, 2017 14:15 | October 13, 2017 05:45 | 1d 15h | 1,613 | 5,301 |
| 10 | July 7, 2017 11:45 | July 12, 2017 02:15 | 4d 14h | 1,430 | 18K |
Outage episodes by size in 2017: 59 reached 100+ customers, 12 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 2017, 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 | 2017 | 17.7 hrs | 1.39 | 3.3 hrs | 0.99 |
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 2017; 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, 2017, 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/2017/michigan/st-clair-county