Benton County Power Outage History
2015–2025 · Iowa
Bottom 20% least reliable nationally — frequent and/or long outages. How grades are calculated
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Aug 10, 2020 | 212 hrs | 10,178 (74%) | Thunderstorm Wind |
| Jul 11, 2025 | 3 hrs | 2,555 (19%) | Tornado |
| Mar 19, 2015 | 2 hrs | 2,532 (18%) | Unnamed event |
| Jun 26, 2016 | 0 hrs | 2,482 (18%) | Hail |
| May 20, 2015 | 4 hrs | 2,244 (16%) | Unnamed event |
Over the 11 years from 2015 to 2025, Benton County recorded 364 distinct power outage events, averaging 2.8 hours per event.
The single worst outage on record in Benton County started August 10, 2020 (Thunderstorm Wind), lasting 212 hours and leaving up to 10,178 customers without power (74% of the county) at its peak.
June has historically been the worst month for outages in Benton County, with 51 events recorded during that month across the dataset.
Based on this history, Benton County earns a Reliability Grade of F, placing it in the 18th 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 Benton County.
| County | Grade | National percentile |
|---|---|---|
| Linn County | F | 16th |
| Greene County | D | 20th |
| Poweshiek County | F | 15th |
| Monroe County | D | 21st |
| Jasper County | F | 14th |
FAQ
How often does power go out in Benton County?
Between 2015 and 2025, Benton County recorded 364 outage events, averaging 2.8 hours each.
What is Benton County's reliability grade?
Benton County has a Reliability Grade of F, in the 18th national percentile.
What was the worst power outage in Benton County?
The worst outage on record started August 10, 2020 (Thunderstorm Wind), lasting 212 hours and affecting up to 10,178 customers.