County annual report · FIPS 55055
2022 Jefferson County, WI Power Outage Report
In 2022, customers in Jefferson County, WI went without power for an average of 4.8 hours, a total of 165K customer-hours (Wisconsin average 4.6 hours). That ranks 28th worst of 72 Wisconsin counties and 1475th of 2,976 nationally.
Compared with WI, the US and 2021
Coverage line is EAGLE-I's share of Wisconsin customers tracked each year.
Biggest outages in Jefferson County, 2022
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 15, 2022 12:15 | June 17, 2022 20:45 | 2d 8h | 8,397 | 45K |
| 2 | November 5, 2022 11:30 | November 7, 2022 21:00 | 2d 9h | 4,995 | 15K |
| 3 | June 13, 2022 20:30 | June 15, 2022 04:45 | 1d 8h | 4,775 | 36K |
| 4 | August 7, 2022 05:30 | August 7, 2022 11:00 | 5h 30m | 3,863 | 12K |
| 5 | April 10, 2022 22:45 | April 11, 2022 02:00 | 3h 15m | 2,733 | 1,674 |
| 6 | July 4, 2022 20:15 | July 4, 2022 20:30 | 15m | 1,909 | 477 |
| 7 | May 4, 2022 16:45 | May 4, 2022 18:30 | 1h 45m | 1,803 | 452 |
| 8 | January 22, 2022 00:15 | January 22, 2022 02:15 | 2h | 1,674 | 2,272 |
| 9 | March 6, 2022 01:45 | March 6, 2022 16:45 | 15h | 1,439 | 4,878 |
| 10 | May 18, 2022 18:00 | May 19, 2022 03:30 | 9h 30m | 1,411 | 2,123 |
Outage episodes by size in 2022: 58 reached 100+ customers, 19 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 Jefferson County reported on EIA Form 861 for 2022, 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 | 2022 | 4.7 hrs | 1.05 | 2.0 hrs | 0.82 |
| Adams-Columbia Electric Coop | 2022 | 4.7 hrs | 1.01 | 4.7 hrs | 1.01 |
| Wisconsin Power & Light Co | - | - | - | - | - |
| Jefferson Utilities | - | - | - | - | - |
| Lake Mills Light & Water | - | - | - | - | - |
| Waterloo Light & Water Comm | - | - | - | - | - |
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 2022; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 34,512 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. Jefferson County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Jefferson County, WI annual power outage report, 2022, 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/2022/wisconsin/jefferson-county