Bannock County Power Outage History
2015–2025 · Idaho
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 |
|---|---|---|---|
| Jan 16, 2020 | 2 hrs | 31,731 (71%) | Winter Storm |
| Aug 29, 2025 | 2 hrs | 8,491 (19%) | Wildfire |
| Jun 23, 2021 | 1 hrs | 8,288 (18%) | Excessive Heat |
| Jun 23, 2021 | 1 hrs | 8,288 (18%) | Excessive Heat |
| Jul 11, 2017 | 2 hrs | 6,803 (15%) | Thunderstorm Wind |
Over the 11 years from 2015 to 2025, Bannock County recorded 392 distinct power outage events, averaging 1.8 hours per event.
The single worst outage on record in Bannock County started January 16, 2020 (Winter Storm), lasting 2 hours and leaving up to 31,731 customers without power (71% of the county) at its peak.
July has historically been the worst month for outages in Bannock County, with 49 events recorded during that month across the dataset.
Based on this history, Bannock County earns a Reliability Grade of A, placing it in the 81st percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Bannock County's outage profile
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Similar counties in Idaho
Counties with the closest reliability grade and national percentile to Bannock County.
| County | Grade | National percentile |
|---|---|---|
| Franklin County | A | 82nd |
| Twin Falls County | A | 82nd |
| Teton County | B | 78th |
| Payette County | A | 85th |
| Bonneville County | A | 85th |
FAQ
How often does power go out in Bannock County?
Between 2015 and 2025, Bannock County recorded 392 outage events, averaging 1.8 hours each.
What is Bannock County's reliability grade?
Bannock County has a Reliability Grade of A, in the 81st national percentile.
What was the worst power outage in Bannock County?
The worst outage on record started January 16, 2020 (Winter Storm), lasting 2 hours and affecting up to 31,731 customers.