County annual report · FIPS 55073
2021 Marathon County, WI Power Outage Report
In 2021, customers in Marathon County, WI went without power for an average of 5.5 hours, a total of 444K customer-hours (Wisconsin average 4.7 hours). That ranks 17th worst of 72 Wisconsin counties and 1237th of 2,974 nationally.
Compared with WI, the US and 2020
Coverage line is EAGLE-I's share of Wisconsin customers tracked each year.
Biggest outages in Marathon 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 | July 28, 2021 19:45 | July 31, 2021 03:00 | 2d 7h | 11,577 | 177K |
| 2 | May 25, 2021 23:30 | May 27, 2021 02:30 | 1d 3h | 11,541 | 29K |
| 3 | December 16, 2021 02:30 | December 18, 2021 23:15 | 2d 20h | 8,620 | 142K |
| 4 | November 3, 2021 14:00 | November 3, 2021 18:00 | 4h | 4,457 | 4,602 |
| 5 | September 6, 2021 18:45 | September 6, 2021 22:30 | 3h 45m | 4,017 | 3,535 |
| 6 | April 10, 2021 12:30 | April 10, 2021 14:00 | 1h 30m | 2,564 | 2,563 |
| 7 | July 5, 2021 22:45 | July 6, 2021 11:00 | 12h 15m | 2,312 | 2,641 |
| 8 | July 27, 2021 05:00 | July 28, 2021 07:30 | 1d 2h | 2,056 | 20K |
| 9 | July 31, 2021 18:30 | August 3, 2021 17:30 | 2d 23h | 1,983 | 5,908 |
| 10 | July 24, 2021 10:15 | July 24, 2021 19:00 | 8h 45m | 1,903 | 5,191 |
Outage episodes by size in 2021: 54 reached 100+ customers, 18 reached 1,000+ customers, 2 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 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 |
|---|---|---|---|---|---|
| Northern States Power Co | 2021 | 6.7 hrs | 1.60 | 2.2 hrs | 1.10 |
| Wisconsin Public Service Corp | 2021 | 9.3 hrs | 1.46 | 1.6 hrs | 0.83 |
| Central Wisconsin Elec Coop | 2018 | 2.5 hrs | 1.27 | - | - |
| Taylor Electric Coop - (WI) | 2018 | 80 min | - | 46 min | - |
| City of Marshfield - (WI) | 2021 | 26 min | 0.26 | 13 min | 0.16 |
| 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 85% of Wisconsin's customers in 2021; 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, 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/wisconsin/marathon-county