Allamakee County Power Outage History
2014–2025 · Iowa
Average — typical outage frequency and duration nationally. How grades are calculated
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Mar 24, 2016 | 7 hrs | 3,957 (51%) | Winter Storm |
| Jul 19, 2017 | 25 hrs | 3,098 (40%) | Thunderstorm Wind |
| Oct 12, 2015 | 2 hrs | 2,707 (35%) | Unnamed event |
| Dec 16, 2021 | 4 hrs | 2,648 (34%) | Thunderstorm Wind |
| Dec 16, 2021 | 3 hrs | 2,648 (34%) | Thunderstorm Wind |
Over the 12 years from 2014 to 2025, Allamakee County recorded 412 distinct power outage events, averaging 2.4 hours per event.
The single worst outage on record in Allamakee County started March 24, 2016 (Winter Storm), lasting 7 hours and leaving up to 3,957 customers without power (51% of the county) at its peak.
June has historically been the worst month for outages in Allamakee County, with 61 events recorded during that month across the dataset.
Based on this history, Allamakee County earns a Reliability Grade of C, placing it in the 58th percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Allamakee County's outage profile
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Similar counties in Iowa
Counties with the closest reliability grade and national percentile to Allamakee County.
| County | Grade | National percentile |
|---|---|---|
| Johnson County | C | 58th |
| Webster County | C | 59th |
| Sac County | C | 58th |
| Butler County | C | 59th |
| Guthrie County | C | 59th |
FAQ
How often does power go out in Allamakee County?
Between 2014 and 2025, Allamakee County recorded 412 outage events, averaging 2.4 hours each.
What is Allamakee County's reliability grade?
Allamakee County has a Reliability Grade of C, in the 58th national percentile.
What was the worst power outage in Allamakee County?
The worst outage on record started March 24, 2016 (Winter Storm), lasting 7 hours and affecting up to 3,957 customers.