Walworth County Power Outage History
2014–2025 · Wisconsin
Average — typical outage frequency and duration nationally. How grades are calculated
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Feb 22, 2023 | 48 hrs | 15,076 (31%) | Winter Storm |
| Jun 23, 2024 | 55 hrs | 13,468 (28%) | Tornado |
| Jun 25, 2023 | 15 hrs | 8,551 (18%) | Unnamed event |
| Apr 1, 2023 | 18 hrs | 7,945 (17%) | Winter Storm |
| Aug 10, 2021 | 18 hrs | 7,818 (16%) | Thunderstorm Wind |
Over the 12 years from 2014 to 2025, Walworth County recorded 533 distinct power outage events, averaging 3.1 hours per event.
The single worst outage on record in Walworth County started February 22, 2023 (Winter Storm), lasting 48 hours and leaving up to 15,076 customers without power (31% of the county) at its peak.
June has historically been the worst month for outages in Walworth County, with 74 events recorded during that month across the dataset.
Based on this history, Walworth County earns a Reliability Grade of C, placing it in the 49th percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Walworth County's outage profile
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Similar counties in Wisconsin
Counties with the closest reliability grade and national percentile to Walworth County.
| County | Grade | National percentile |
|---|---|---|
| Ozaukee County | C | 50th |
| Marquette County | C | 46th |
| Jefferson County | C | 46th |
| Sawyer County | C | 44th |
| Waupaca County | C | 44th |
FAQ
How often does power go out in Walworth County?
Between 2014 and 2025, Walworth County recorded 533 outage events, averaging 3.1 hours each.
What is Walworth County's reliability grade?
Walworth County has a Reliability Grade of C, in the 49th national percentile.
What was the worst power outage in Walworth County?
The worst outage on record started February 22, 2023 (Winter Storm), lasting 48 hours and affecting up to 15,076 customers.