Butler CountyPower Outage History
What this grade means
Average — typical outage frequency and duration nationally. This county sits in the middle of the national distribution — its outage frequency and duration over the past 12 years are close to the nationwide median, neither notably better nor worse than most other US counties. A typical amount of backup-power preparedness is reasonable here.
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Jul 29, 2025 | 33 hrs | 3,840 (50%) | Thunderstorm Wind |
| May 21, 2024 | 20 hrs | 3,026 (39%) | Drought |
| May 24, 2024 | 7 hrs | 2,464 (32%) | Drought |
| Sep 22, 2016 | 2 hrs | 2,279 (30%) | Heavy Rain |
| May 17, 2017 | 21 hrs | 2,237 (29%) | Heavy Rain |
Was There an Outage on a Specific Date?
Pick a date to see whether a power outage was recorded for Butler County, Iowa that day.
Over the 12 years from 2014 to 2025, Butler County recorded 423 distinct power outage events, averaging 3.0 hours per event.
The single worst outage on record in Butler County started July 29, 2025 (Thunderstorm Wind), lasting 33 hours and leaving up to 3,840 customers without power (50% of the county) at its peak.
June has historically been the worst month for outages in Butler County, with 65 events recorded during that month across the dataset.
Based on this history, Butler County earns a Reliability Grade of C, placing it in the 59th percentile nationally for grid reliability (higher percentile = more reliable).
Similar counties in Iowa
Counties with the closest reliability grade and national percentile to Butler County.
| County | Grade | National percentile |
|---|---|---|
| Guthrie County | C | 59th |
| Webster County | C | 59th |
| Allamakee County | C | 58th |
| Johnson County | C | 58th |
| Sac County | C | 58th |
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 Butler County?
Between 2014 and 2025, Butler County recorded 423 outage events, averaging 3.0 hours each.
What is Butler County's reliability grade?
Butler County has a Reliability Grade of C, in the 59th national percentile.
What was the worst power outage in Butler County?
The worst outage on record started July 29, 2025 (Thunderstorm Wind), lasting 33 hours and affecting up to 3,840 customers.