Bonneville County Power Outage History
2017–2025 · 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 |
|---|---|---|---|
| May 28, 2020 | 1 hrs | 45,980 (56%) | Unnamed event |
| May 28, 2020 | 6 hrs | 28,877 (35%) | Unnamed event |
| May 29, 2020 | 3 hrs | 28,876 (35%) | Unnamed event |
| May 29, 2020 | 2 hrs | 28,875 (35%) | Unnamed event |
| May 29, 2020 | 0 hrs | 28,875 (35%) | Unnamed event |
Over the 9 years from 2017 to 2025, Bonneville County recorded 313 distinct power outage events, averaging 1.8 hours per event.
The single worst outage on record in Bonneville County started May 28, 2020, lasting 1 hours and leaving up to 45,980 customers without power (56% of the county) at its peak.
May has historically been the worst month for outages in Bonneville County, with 38 events recorded during that month across the dataset.
Based on this history, Bonneville County earns a Reliability Grade of A, placing it in the 85th percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Bonneville County's outage profile
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Similar counties in Idaho
Counties with the closest reliability grade and national percentile to Bonneville County.
| County | Grade | National percentile |
|---|---|---|
| Payette County | A | 85th |
| Twin Falls County | A | 82nd |
| Franklin County | A | 82nd |
| Canyon County | A | 88th |
| Bannock County | A | 81st |
FAQ
How often does power go out in Bonneville County?
Between 2017 and 2025, Bonneville County recorded 313 outage events, averaging 1.8 hours each.
What is Bonneville County's reliability grade?
Bonneville County has a Reliability Grade of A, in the 85th national percentile.
What was the worst power outage in Bonneville County?
The worst outage on record started May 28, 2020, lasting 1 hours and affecting up to 45,980 customers.