Mills County Power Outage History
2015–2025 · 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 |
|---|---|---|---|
| Jan 21, 2018 | 6 hrs | 6,702 (82%) | Unnamed event |
| Dec 15, 2021 | 68 hrs | 5,353 (66%) | High Wind |
| Jun 17, 2017 | 42 hrs | 3,779 (46%) | Hail |
| Jun 15, 2022 | 14 hrs | 2,540 (31%) | Hail |
| Jul 7, 2016 | 6 hrs | 2,514 (31%) | Unnamed event |
Over the 11 years from 2015 to 2025, Mills County recorded 354 distinct power outage events, averaging 2.6 hours per event.
The single worst outage on record in Mills County started January 21, 2018, lasting 6 hours and leaving up to 6,702 customers without power (82% of the county) at its peak.
June has historically been the worst month for outages in Mills County, with 47 events recorded during that month across the dataset.
Based on this history, Mills County earns a Reliability Grade of C, placing it in the 49th percentile nationally for grid reliability (higher percentile = more reliable).
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Similar counties in Iowa
Counties with the closest reliability grade and national percentile to Mills County.
| County | Grade | National percentile |
|---|---|---|
| Scott County | C | 50th |
| Hancock County | C | 48th |
| Appanoose County | C | 48th |
| Keokuk County | C | 51st |
| Washington County | C | 47th |
FAQ
How often does power go out in Mills County?
Between 2015 and 2025, Mills County recorded 354 outage events, averaging 2.6 hours each.
What is Mills County's reliability grade?
Mills County has a Reliability Grade of C, in the 49th national percentile.
What was the worst power outage in Mills County?
The worst outage on record started January 21, 2018, lasting 6 hours and affecting up to 6,702 customers.