Poweshiek County Power Outage History
2014–2025 · Iowa
Bottom 20% least reliable nationally — frequent and/or long outages. How grades are calculated
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 | 0 hrs | 3,619 (34%) | Heavy Rain |
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).
Sized for Poweshiek County's outage profile
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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 |
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.