County annual report · FIPS 26147
2020 St. Clair County, MI Power Outage Report
In 2020, customers in St. Clair County, MI went without power for an average of 10.5 hours, a total of 747K customer-hours (Michigan average 9.8 hours). That ranks 35th worst of 83 Michigan counties and 760th 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 St. Clair 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 | November 15, 2020 05:15 | November 17, 2020 04:45 | 1d 23h | 11,064 | 234K |
| 2 | February 12, 2020 18:45 | February 12, 2020 19:00 | 15m | 9,139 | 2,285 |
| 3 | November 1, 2020 12:00 | November 3, 2020 04:30 | 1d 16h | 6,613 | 11K |
| 4 | November 17, 2020 06:15 | November 21, 2020 02:00 | 3d 19h | 6,401 | 110K |
| 5 | June 10, 2020 03:30 | June 10, 2020 20:30 | 17h | 6,249 | 8,483 |
| 6 | July 1, 2020 11:15 | July 3, 2020 01:30 | 1d 14h | 5,484 | 13K |
| 7 | June 26, 2020 14:45 | June 28, 2020 23:30 | 2d 8h | 4,680 | 35K |
| 8 | July 18, 2020 22:45 | July 22, 2020 04:45 | 3d 6h | 4,609 | 73K |
| 9 | April 9, 2020 04:30 | April 10, 2020 07:45 | 1d 3h | 4,113 | 14K |
| 10 | October 17, 2020 00:00 | October 19, 2020 02:45 | 2d 2h | 3,330 | 4,076 |
Outage episodes by size in 2020: 92 reached 100+ customers, 25 reached 1,000+ customers, 1 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 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 |
|---|---|---|---|---|---|
| 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 ÷ 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, 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/st-clair-county