Green 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 |
|---|---|---|---|
| Jul 20, 2017 | 11 hrs | 4,731 (30%) | Thunderstorm Wind |
| Jun 29, 2017 | 9 hrs | 4,313 (28%) | Tornado |
| Jul 6, 2016 | 11 hrs | 3,634 (23%) | Unnamed event |
| Sep 18, 2018 | <1 hr | 3,080 (20%) | Unnamed event |
| Jul 12, 2020 | 2 hrs | 2,905 (19%) | Unnamed event |
Was There an Outage on a Specific Date?
Pick a date to see whether a power outage was recorded for Green County, Wisconsin that day.
Over the 12 years from 2014 to 2025, Green County recorded 364 distinct power outage events, averaging 1.9 hours per event.
The single worst outage on record in Green County started July 20, 2017 (Thunderstorm Wind), lasting 11 hours and leaving up to 4,731 customers without power (30% of the county) at its peak.
July has historically been the worst month for outages in Green County, with 47 events recorded during that month across the dataset.
Based on this history, Green County earns a Reliability Grade of A, placing it in the 82nd percentile nationally for grid reliability (higher percentile = more reliable).
Similar counties in Wisconsin
Counties with the closest reliability grade and national percentile to Green County.
| County | Grade | National percentile |
|---|---|---|
| Wood County | A | 82nd |
| Chippewa County | A | 83rd |
| Pepin County | A | 83rd |
| La Crosse County | A | 84th |
| Lafayette County | B | 79th |
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 Green County?
Between 2014 and 2025, Green County recorded 364 outage events, averaging 1.9 hours each.
What is Green County's reliability grade?
Green County has a Reliability Grade of A, in the 82nd national percentile.
What was the worst power outage in Green County?
The worst outage on record started July 20, 2017 (Thunderstorm Wind), lasting 11 hours and affecting up to 4,731 customers.