County annual report · FIPS 26041
2021 Delta County, MI Power Outage Report
In 2021, customers in Delta County, MI went without power for an average of 2.3 hours, a total of 57K customer-hours (Michigan average 26.6 hours). That ranks 83rd worst of 83 Michigan counties and 2101st of 2,974 nationally.
Compared with MI, the US and 2020
Coverage line is EAGLE-I's share of Michigan customers tracked each year.
Biggest outages in Delta County, 2021
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 26, 2021 01:30 | May 27, 2021 05:15 | 1d 3h | 2,751 | 12K |
| 2 | December 16, 2021 04:15 | December 18, 2021 17:45 | 2d 13h | 1,468 | 9,768 |
| 3 | May 25, 2021 08:15 | May 25, 2021 15:00 | 6h 45m | 1,432 | 3,241 |
| 4 | June 24, 2021 18:45 | June 24, 2021 20:15 | 1h 30m | 1,431 | 788 |
| 5 | June 28, 2021 17:30 | June 28, 2021 23:30 | 6h | 1,431 | 562 |
| 6 | December 11, 2021 11:45 | December 13, 2021 00:00 | 1d 12h | 1,428 | 13K |
| 7 | August 10, 2021 23:15 | August 11, 2021 07:30 | 8h 15m | 893 | 2,911 |
| 8 | August 28, 2021 20:30 | August 29, 2021 01:30 | 5h | 892 | 267 |
| 9 | July 5, 2021 13:00 | July 5, 2021 18:45 | 5h 45m | 738 | 2,947 |
| 10 | July 6, 2021 12:15 | July 6, 2021 23:15 | 11h | 737 | 204 |
Outage episodes by size in 2021: 21 reached 100+ customers, 6 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 Delta County reported on EIA Form 861 for 2021, 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 | 2021 | 15.5 hrs | 1.58 | 2.3 hrs | 0.92 |
| Upper Peninsula Power Company | 2021 | 4.6 hrs | 1.48 | 2.5 hrs | 1.16 |
| Upper Michigan Energy Resources Corp. | 2021 | 13.0 hrs | 2.15 | 4.0 hrs | 1.50 |
| Alger-Delta Coop Electric Assn | 2021 | 3.2 hrs | 1.01 | 55 min | 0.99 |
| Cloverland Electric Co-op | 2021 | 17.0 hrs | 3.87 | 4.8 hrs | 2.39 |
| City of Escanaba | - | - | - | - | - |
| City of Gladstone | - | - | - | - | - |
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 2021; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 24,519 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. Delta County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Delta County, MI annual power outage report, 2021, 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/2021/michigan/delta-county