Washington 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 17, 2017 | 0 hrs | 15,902 (28%) | Unnamed event |
| Nov 5, 2022 | 39 hrs | 10,619 (19%) | Thunderstorm Wind |
| Aug 11, 2021 | 1 hrs | 10,326 (18%) | Thunderstorm Wind |
| Jul 29, 2023 | 43 hrs | 10,109 (18%) | Hail |
| Aug 6, 2021 | 2 hrs | 8,855 (16%) | Unnamed event |
Over the 12 years from 2014 to 2025, Washington County recorded 554 distinct power outage events, averaging 3.5 hours per event.
The single worst outage on record in Washington County started February 17, 2017, lasting 0 hours and leaving up to 15,902 customers without power (28% of the county) at its peak.
August has historically been the worst month for outages in Washington County, with 88 events recorded during that month across the dataset.
Based on this history, Washington County earns a Reliability Grade of C, placing it in the 55th percentile nationally for grid reliability (higher percentile = more reliable).
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Similar counties in Wisconsin
Counties with the closest reliability grade and national percentile to Washington County.
| County | Grade | National percentile |
|---|---|---|
| Ozaukee County | C | 50th |
| Bayfield County | B | 60th |
| Shawano County | B | 61st |
| Walworth County | C | 49th |
| Waushara County | B | 62nd |
FAQ
How often does power go out in Washington County?
Between 2014 and 2025, Washington County recorded 554 outage events, averaging 3.5 hours each.
What is Washington County's reliability grade?
Washington County has a Reliability Grade of C, in the 55th national percentile.
What was the worst power outage in Washington County?
The worst outage on record started February 17, 2017, lasting 0 hours and affecting up to 15,902 customers.