Poweshiek CountyPower Outage History
What this grade means
Bottom 20% least reliable nationally — frequent and/or long outages. This county ranks in the least reliable fifth of all US counties in our dataset: some combination of frequent outages, long restoration times, or customers affected puts it near the bottom nationally. Backup power is worth prioritizing here rather than treating it as optional.
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Aug 10, 2020 | 212 hrs | 8,164 (77%) | Thunderstorm Wind |
| Mar 15, 2025 | 3 hrs | 4,717 (44%) | Thunderstorm Wind |
| Sep 13, 2016 | 2 hrs | 3,667 (34%) | Heavy Rain |
| Jan 30, 2025 | 3 hrs | 3,659 (34%) | Unnamed event |
| May 16, 2017 | <1 hr | 3,619 (34%) | Heavy Rain |
Was There an Outage on a Specific Date?
Pick a date to see whether a power outage was recorded for Poweshiek County, Iowa that day.
Over the 12 years from 2014 to 2025, Poweshiek County recorded 457 distinct power outage events, averaging 2.3 hours per event.
The single worst outage on record in Poweshiek County started August 10, 2020 (Thunderstorm Wind), lasting 212 hours and leaving up to 8,164 customers without power (77% of the county) at its peak.
May has historically been the worst month for outages in Poweshiek County, with 58 events recorded during that month across the dataset.
Based on this history, Poweshiek County earns a Reliability Grade of F, placing it in the 15th percentile nationally for grid reliability (higher percentile = more reliable).
Similar counties in Iowa
Counties with the closest reliability grade and national percentile to Poweshiek County.
| County | Grade | National percentile |
|---|---|---|
| Linn County | F | 16th |
| Jasper County | F | 14th |
| Benton County | F | 18th |
| Tama County | F | 12th |
| Greene County | D | 20th |
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 Poweshiek County?
Between 2014 and 2025, Poweshiek County recorded 457 outage events, averaging 2.3 hours each.
What is Poweshiek County's reliability grade?
Poweshiek County has a Reliability Grade of F, in the 15th national percentile.
What was the worst power outage in Poweshiek County?
The worst outage on record started August 10, 2020 (Thunderstorm Wind), lasting 212 hours and affecting up to 8,164 customers.