Pottawattamie County Power Outage History
2015–2025 · Iowa
Better than average — fewer or shorter outages than most counties. How grades are calculated
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Jul 10, 2021 | 84 hrs | 12,888 (25%) | Thunderstorm Wind |
| Jun 26, 2024 | 28 hrs | 12,184 (24%) | Heat |
| Mar 31, 2020 | 1 hrs | 10,553 (21%) | Unnamed event |
| Jul 12, 2023 | 10 hrs | 8,116 (16%) | Thunderstorm Wind |
| Dec 15, 2021 | 48 hrs | 7,608 (15%) | Tornado |
Over the 11 years from 2015 to 2025, Pottawattamie County recorded 424 distinct power outage events, averaging 2.5 hours per event.
The single worst outage on record in Pottawattamie County started July 10, 2021 (Thunderstorm Wind), lasting 84 hours and leaving up to 12,888 customers without power (25% of the county) at its peak.
June has historically been the worst month for outages in Pottawattamie County, with 66 events recorded during that month across the dataset.
Based on this history, Pottawattamie County earns a Reliability Grade of B, placing it in the 72nd percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Pottawattamie County's outage profile
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Similar counties in Iowa
Counties with the closest reliability grade and national percentile to Pottawattamie County.
| County | Grade | National percentile |
|---|---|---|
| Henry County | B | 71st |
| Winnebago County | B | 72nd |
| Delaware County | B | 72nd |
| Monona County | B | 74th |
| Taylor County | B | 74th |
FAQ
How often does power go out in Pottawattamie County?
Between 2015 and 2025, Pottawattamie County recorded 424 outage events, averaging 2.5 hours each.
What is Pottawattamie County's reliability grade?
Pottawattamie County has a Reliability Grade of B, in the 72nd national percentile.
What was the worst power outage in Pottawattamie County?
The worst outage on record started July 10, 2021 (Thunderstorm Wind), lasting 84 hours and affecting up to 12,888 customers.