County annual report · FIPS 55077
2025 Marquette County, WI Power Outage Report
In 2025, customers in Marquette County, WI went without power for an average of 3.0 hours, a total of 26K customer-hours (Wisconsin average 3.9 hours). That ranks 31st worst of 72 Wisconsin counties and 2065th of 3,000 nationally.
Compared with WI, the US and 2024
Coverage line is EAGLE-I's share of Wisconsin customers tracked each year.
Biggest outages in Marquette 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 | June 23, 2025 23:00 | June 25, 2025 00:30 | 1d 1h | 2,473 | 6,303 |
| 2 | August 16, 2025 16:15 | August 18, 2025 00:30 | 1d 8h | 1,774 | 9,462 |
| 3 | April 28, 2025 16:45 | April 28, 2025 19:45 | 3h | 654 | 983 |
| 4 | April 11, 2025 06:00 | April 11, 2025 08:00 | 2h | 386 | 683 |
| 5 | June 28, 2025 11:00 | June 28, 2025 13:00 | 2h | 331 | 662 |
| 6 | February 6, 2025 20:30 | February 7, 2025 02:15 | 5h 45m | 310 | 592 |
| 7 | September 9, 2025 16:00 | September 9, 2025 16:15 | 15m | 231 | 58 |
| 8 | December 20, 2025 20:30 | December 21, 2025 01:00 | 4h 30m | 207 | 753 |
| 9 | May 16, 2025 21:30 | May 17, 2025 02:30 | 5h | 204 | 605 |
| 10 | October 20, 2025 19:30 | October 20, 2025 21:30 | 2h | 182 | 364 |
Outage episodes by size in 2025: 12 reached 100+ customers, 2 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 Marquette 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 |
|---|---|---|---|---|---|
| Wisconsin Electric Power Co | 2024 | 4.9 hrs | 1.04 | 1.8 hrs | 0.74 |
| Adams-Columbia Electric Coop | 2024 | 2.3 hrs | 1.15 | 2.3 hrs | 1.15 |
| Alliant Energy (Interstate Power & Light) | - | - | - | - | - |
| Wisconsin Power & Light Co | - | - | - | - | - |
| Pioneer Power and Light Co | - | - | - | - | - |
| Westfield Electric Company | - | - | - | - | - |
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 Wisconsin's customers in 2025; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 8,847 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. Marquette County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Marquette County, WI 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/wisconsin/marquette-county