Green County Power Outage History
2014–2025 · Wisconsin
Top 20% most reliable nationally — infrequent, short outages. How grades are calculated
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 hrs | 3,080 (20%) | Unnamed event |
| Jul 12, 2020 | 2 hrs | 2,905 (19%) | Unnamed event |
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).
Sized for Green County's outage profile
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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 |
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.