Appanoose 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 |
|---|---|---|---|
| Dec 16, 2021 | 25 hrs | 5,385 (69%) | High Wind |
| Jun 29, 2023 | 9 hrs | 5,301 (68%) | Drought |
| Mar 7, 2017 | 31 hrs | 3,222 (41%) | Tornado |
| Jul 30, 2024 | 5 hrs | 2,465 (32%) | Thunderstorm Wind |
| Jul 21, 2019 | 11 hrs | 2,098 (27%) | Excessive Heat |
Over the 12 years from 2014 to 2025, Appanoose County recorded 659 distinct power outage events, averaging 2.6 hours per event.
The single worst outage on record in Appanoose County started December 16, 2021 (High Wind), lasting 25 hours and leaving up to 5,385 customers without power (69% of the county) at its peak.
July has historically been the worst month for outages in Appanoose County, with 92 events recorded during that month across the dataset.
Based on this history, Appanoose County earns a Reliability Grade of C, placing it in the 48th percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Appanoose County's outage profile
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Similar counties in Iowa
Counties with the closest reliability grade and national percentile to Appanoose County.
| County | Grade | National percentile |
|---|---|---|
| Hancock County | C | 48th |
| Washington County | C | 47th |
| Calhoun County | C | 47th |
| Mills County | C | 49th |
| Grundy County | C | 46th |
FAQ
How often does power go out in Appanoose County?
Between 2014 and 2025, Appanoose County recorded 659 outage events, averaging 2.6 hours each.
What is Appanoose County's reliability grade?
Appanoose County has a Reliability Grade of C, in the 48th national percentile.
What was the worst power outage in Appanoose County?
The worst outage on record started December 16, 2021 (High Wind), lasting 25 hours and affecting up to 5,385 customers.