Dunn CountyPower Outage History
What this grade means
Top 20% most reliable nationally — infrequent, short outages. This county ranks in the most reliable fifth of all US counties in our dataset, based on 12 years of real DOE outage records: outages happen less often here, and when they do occur they tend to be resolved quickly compared to the rest of the country. Baseline outage risk is low, though a severe local storm can still occasionally cause a longer-than-usual outage regardless of the long-term track record.
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| May 11, 2022 | <1 hr | 6,799 (27%) | Tornado |
| Jul 29, 2025 | 19 hrs | 6,292 (25%) | Thunderstorm Wind |
| Dec 15, 2022 | 30 hrs | 5,164 (21%) | Unnamed event |
| Jan 4, 2023 | <1 hr | 4,616 (19%) | Winter Weather |
| Jun 10, 2016 | 2 hrs | 3,986 (16%) | Hail |
Was There an Outage on a Specific Date?
Pick a date to see whether a power outage was recorded for Dunn County, Wisconsin that day.
Over the 12 years from 2014 to 2025, Dunn County recorded 218 distinct power outage events, averaging 2.4 hours per event.
The single worst outage on record in Dunn County started May 11, 2022 (Tornado), lasting less than 1 hour and leaving up to 6,799 customers without power (27% of the county) at its peak.
June has historically been the worst month for outages in Dunn County, with 39 events recorded during that month across the dataset.
Based on this history, Dunn County earns a Reliability Grade of A, placing it in the 85th percentile nationally for grid reliability (higher percentile = more reliable).
Similar counties in Wisconsin
Counties with the closest reliability grade and national percentile to Dunn County.
| County | Grade | National percentile |
|---|---|---|
| Vernon County | A | 85th |
| Monroe County | A | 86th |
| Trempealeau County | A | 86th |
| La Crosse County | A | 84th |
| Pepin County | A | 83rd |
Most reliable counties nationally
The top 3 counties nationally by reliability grade and percentile.
| County | State | Grade | National percentile |
|---|---|---|---|
| Clay County | South Dakota | A | 100th |
| Clearwater County | Minnesota | A | 99th |
| Limestone County | Alabama | A | 99th |
Least reliable counties nationally
The bottom 3 counties nationally by reliability grade and percentile.
| County | State | Grade | National percentile |
|---|---|---|---|
| Clay County | West Virginia | F | 0th |
| Lincoln County | West Virginia | F | 0th |
| Cameron Parish | Louisiana | F | 0th |
FAQ
How often does power go out in Dunn County?
Between 2014 and 2025, Dunn County recorded 218 outage events, averaging 2.4 hours each.
What is Dunn County's reliability grade?
Dunn County has a Reliability Grade of A, in the 85th national percentile.
What was the worst power outage in Dunn County?
The worst outage on record started May 11, 2022 (Tornado), lasting less than 1 hour and affecting up to 6,799 customers.