County annual report · FIPS 55039
2021 Fond du Lac County, WI Power Outage Report
In 2021, customers in Fond du Lac County, WI went without power for an average of 2.0 hours, a total of 178K customer-hours (Wisconsin average 4.7 hours). That ranks 44th worst of 72 Wisconsin counties and 2229th 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 Fond du Lac 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 29, 2021 05:00 | August 3, 2021 23:15 | 5d 18h | 7,238 | 113K |
| 2 | November 8, 2021 16:30 | November 8, 2021 21:30 | 5h | 3,370 | 1,700 |
| 3 | June 1, 2021 01:45 | June 1, 2021 05:45 | 4h | 2,875 | 5,494 |
| 4 | August 6, 2021 21:30 | August 9, 2021 18:45 | 2d 21h | 1,540 | 8,299 |
| 5 | October 5, 2021 13:45 | October 5, 2021 18:30 | 4h 45m | 1,506 | 777 |
| 6 | October 12, 2021 19:45 | October 12, 2021 20:00 | 15m | 1,503 | 376 |
| 7 | February 5, 2021 16:15 | February 5, 2021 23:15 | 7h | 1,493 | 1,301 |
| 8 | June 18, 2021 04:15 | June 19, 2021 01:15 | 21h | 1,283 | 5,054 |
| 9 | May 29, 2021 02:45 | May 29, 2021 04:15 | 1h 30m | 1,236 | 1,852 |
| 10 | May 14, 2021 18:00 | May 14, 2021 19:30 | 1h 30m | 1,196 | 898 |
Outage episodes by size in 2021: 44 reached 100+ customers, 11 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 Fond du Lac 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 |
|---|---|---|---|---|---|
| Wisconsin Electric Power Co | 2021 | 7.0 hrs | 1.13 | 1.7 hrs | 0.73 |
| Wisconsin Public Service Corp | 2021 | 9.3 hrs | 1.46 | 1.6 hrs | 0.83 |
| Waupun Utilities | 2021 | 12 min | 0.22 | 12 min | 0.22 |
| Alliant Energy (Interstate Power & Light) | - | - | - | - | - |
| Wisconsin Power & Light Co | - | - | - | - | - |
| City of Plymouth - (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 ÷ 89,727 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. Fond du Lac County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Fond du Lac 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/fond-du-lac-county