Woodbury County Power Outage History
2014–2025 · Iowa
Top 20% most reliable nationally — infrequent, short outages. How grades are calculated
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Jun 18, 2016 | 36 hrs | 10,213 (20%) | Excessive Heat |
| Jul 30, 2024 | 25 hrs | 7,310 (15%) | Flash Flood |
| Feb 25, 2017 | 2 hrs | 6,252 (12%) | Blizzard |
| Feb 2, 2020 | 5 hrs | 6,138 (12%) | Unnamed event |
| Dec 20, 2018 | 2 hrs | 5,264 (10%) | Unnamed event |
Over the 12 years from 2014 to 2025, Woodbury County recorded 484 distinct power outage events, averaging 2.2 hours per event.
The single worst outage on record in Woodbury County started June 18, 2016 (Excessive Heat), lasting 36 hours and leaving up to 10,213 customers without power (20% of the county) at its peak.
August has historically been the worst month for outages in Woodbury County, with 64 events recorded during that month across the dataset.
Based on this history, Woodbury County earns a Reliability Grade of A, placing it in the 83rd percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Woodbury County's outage profile
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Similar counties in Iowa
Counties with the closest reliability grade and national percentile to Woodbury County.
| County | Grade | National percentile |
|---|---|---|
| Mahaska County | A | 84th |
| Wapello County | A | 83rd |
| Davis County | A | 82nd |
| Buchanan County | A | 84th |
| Lucas County | A | 82nd |
FAQ
How often does power go out in Woodbury County?
Between 2014 and 2025, Woodbury County recorded 484 outage events, averaging 2.2 hours each.
What is Woodbury County's reliability grade?
Woodbury County has a Reliability Grade of A, in the 83rd national percentile.
What was the worst power outage in Woodbury County?
The worst outage on record started June 18, 2016 (Excessive Heat), lasting 36 hours and affecting up to 10,213 customers.