County annual report · FIPS 55073
2025 Marathon County, WI Power Outage Report
In 2025, customers in Marathon County, WI went without power for an average of 2.8 hours, a total of 226K customer-hours (Wisconsin average 3.9 hours). That ranks 34th worst of 72 Wisconsin counties and 2133rd 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 Marathon 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 | July 9, 2025 22:00 | July 9, 2025 22:15 | 15m | 8,537 | 2,134 |
| 2 | March 30, 2025 06:30 | April 2, 2025 19:45 | 3d 13h | 6,234 | 131K |
| 3 | April 18, 2025 22:45 | April 19, 2025 02:30 | 3h 45m | 2,507 | 2,162 |
| 4 | May 15, 2025 17:45 | May 18, 2025 00:30 | 2d 6h | 2,271 | 20K |
| 5 | March 23, 2025 19:30 | March 25, 2025 00:30 | 1d 5h | 2,166 | 10K |
| 6 | December 20, 2025 18:00 | December 21, 2025 05:00 | 11h | 2,030 | 3,143 |
| 7 | February 11, 2025 18:15 | February 11, 2025 20:00 | 1h 45m | 1,714 | 2,142 |
| 8 | June 20, 2025 06:45 | June 20, 2025 21:45 | 15h | 1,685 | 3,797 |
| 9 | August 5, 2025 16:15 | November 30, 2025 19:00 | 117d 2h | 1,536 | 15K |
| 10 | May 30, 2025 11:00 | May 30, 2025 16:00 | 5h | 1,530 | 2,046 |
Outage episodes by size in 2025: 38 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 Marathon 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 |
|---|---|---|---|---|---|
| Northern States Power Co | 2024 | 3.1 hrs | 1.06 | 2.0 hrs | 0.81 |
| Wisconsin Public Service Corp | 2024 | 7.8 hrs | 1.22 | 1.6 hrs | 0.77 |
| Central Wisconsin Elec Coop | 2018 | 2.5 hrs | 1.27 | - | - |
| Taylor Electric Coop - (WI) | 2018 | 80 min | - | 46 min | - |
| City of Marshfield - (WI) | 2024 | 36 min | 0.60 | 20 min | 0.37 |
| Alliant Energy (Interstate Power & Light) | - | - | - | - | - |
| Wisconsin Power & Light Co | - | - | - | - | - |
| Clark Electric Coop - (WI) | - | - | - | - | - |
| Village of Stratford - (WI) | - | - | - | - | - |
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 ÷ 80,598 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. Marathon County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Marathon 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/marathon-county