Bremer County Power Outage History
2015–2025 · 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 |
|---|---|---|---|
| Jul 29, 2025 | 18 hrs | 2,333 (15%) | Thunderstorm Wind |
| Aug 24, 2021 | 20 hrs | 1,615 (10%) | Drought |
| Sep 22, 2016 | 2 hrs | 1,567 (10%) | Heavy Rain |
| May 17, 2017 | 17 hrs | 1,364 (9%) | Thunderstorm Wind |
| Jul 9, 2020 | 3 hrs | 1,133 (7%) | Unnamed event |
Over the 11 years from 2015 to 2025, Bremer County recorded 151 distinct power outage events, averaging 2.0 hours per event.
The single worst outage on record in Bremer County started July 29, 2025 (Thunderstorm Wind), lasting 18 hours and leaving up to 2,333 customers without power (15% of the county) at its peak.
June has historically been the worst month for outages in Bremer County, with 25 events recorded during that month across the dataset.
Based on this history, Bremer County earns a Reliability Grade of A, placing it in the 94th percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Bremer County's outage profile
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Similar counties in Iowa
Counties with the closest reliability grade and national percentile to Bremer County.
| County | Grade | National percentile |
|---|---|---|
| Emmet County | A | 95th |
| Muscatine County | A | 92nd |
| Clay County | A | 97th |
| Dubuque County | A | 91st |
| Adair County | A | 90th |
FAQ
How often does power go out in Bremer County?
Between 2015 and 2025, Bremer County recorded 151 outage events, averaging 2.0 hours each.
What is Bremer County's reliability grade?
Bremer County has a Reliability Grade of A, in the 94th national percentile.
What was the worst power outage in Bremer County?
The worst outage on record started July 29, 2025 (Thunderstorm Wind), lasting 18 hours and affecting up to 2,333 customers.