Power Outages in Jefferson County, WI
As of the latest utility report, no major power outages are reported in Jefferson County, WI. In 2025, the average customer here lost power for about 5.4 hours.
Jefferson County, WI is served by 1 tracked utility.
No active power outages are currently reported in Jefferson County.
- Air Quality AlertUNKNOWN
Jefferson County has been under 9 National Weather Service alerts recently — most recently a Air Quality Alert on July 18, 2026.
- Heat Advisory ×5
- Air Quality Alert ×4
Hardest-hit cities in Jefferson County
Where this event is concentrated across the county's towns and townships.
Historical reliability
In 2025, the average customer in Jefferson County went about 5.4 hours without power. Peak simultaneous outage on record reached 13,807 customers.
Worst year here was 2023 (peak 12,904 customers out) · decade average 4.6 hrs without power per customer/yr.
| Year | Outage events | Peak customers out | Avg hrs/customer |
|---|---|---|---|
| 2015 | 299 | 5,251 | 2.0 |
| 2016 | 358 | 2,518 | 1.4 |
| 2017 | 408 | 5,253 | 2.9 |
| 2018 | 377 | 5,472 | 3.2 |
| 2019 | 373 | 5,853 | 3.5 |
| 2020 | 461 | 5,926 | 1.8 |
| 2021 | 432 | 6,941 | 5.7 |
| 2022 | 469 | 8,397 | 4.8 |
| 2023 | 511 | 12,904 | 15.9 |
| 2024 | 517 | 13,807 | 4.5 |
| 2025 | 523 | 7,953 | 5.4 |
Relatively Moderate high winds exposure · 4.6 hrs/yr of outages over the last decade.
Power outages in Jefferson County: FAQ
- How often does Jefferson County, WI lose power?
- Based on EAGLE-I records, Jefferson County, WI logged 523 distinct outage events in 2025, averaging about 5.4 hours without power per customer over the year.
- What was the worst power outage in Jefferson County, WI?
- The largest tracked outage peaked at 13,807 customers without power, beginning May 29, 2024 and lasting about 10h 45m.
- Is there a power outage in Jefferson County, WI right now?
- No major outage is currently reported for Jefferson County, WI. Live coverage depends on whether local utilities report to ODIN.
- Which utilities serve Jefferson County, WI?
- Tracked electric providers include Alliant Energy (Interstate Power & Light).
Outages are tracked at the county level; these ZIP codes fall within Jefferson County.
53036, 53038, 53094, 53137, 53156, 53178, 53538, 53549, 53551, 53594
Electric providers serving this county
From EIA-861 service territory, with official reliability where reported.
| Provider | Official SAIDI (EIA) | Live | Report outage |
|---|---|---|---|
| Alliant Energy (Interstate Power & Light) | — | ODIN ✓ | — |
Machine-readable data: /api/v1/counties/55055 and /api/v1/counties/55055/history. Historical figures derive from the DOE/ORNL EAGLE-I dataset (EAGLE-I tracked roughly 0% of Wisconsin customers).