Teton County Power Outage History
2017–2025 · Idaho
Better than average — fewer or shorter outages than most counties. How grades are calculated
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Nov 2, 2019 | 5 hrs | 7,112 (76%) | Unnamed event |
| Apr 1, 2024 | 1 hrs | 6,313 (67%) | Winter Weather |
| Mar 23, 2018 | 3 hrs | 6,225 (66%) | Unnamed event |
| Jan 20, 2025 | 5 hrs | 2,613 (28%) | Extreme Cold/Wind Chill |
| Sep 21, 2018 | 1 hrs | 2,386 (25%) | Unnamed event |
Over the 9 years from 2017 to 2025, Teton County recorded 717 distinct power outage events, averaging 2.0 hours per event.
The single worst outage on record in Teton County started November 2, 2019, lasting 5 hours and leaving up to 7,112 customers without power (76% of the county) at its peak.
August has historically been the worst month for outages in Teton County, with 95 events recorded during that month across the dataset.
Based on this history, Teton County earns a Reliability Grade of B, placing it in the 78th percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Teton County's outage profile
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Outage-prep kit
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Similar counties in Idaho
Counties with the closest reliability grade and national percentile to Teton County.
| County | Grade | National percentile |
|---|---|---|
| Bannock County | A | 81st |
| Franklin County | A | 82nd |
| Twin Falls County | A | 82nd |
| Lewis County | B | 73rd |
| Payette County | A | 85th |
FAQ
How often does power go out in Teton County?
Between 2017 and 2025, Teton County recorded 717 outage events, averaging 2.0 hours each.
What is Teton County's reliability grade?
Teton County has a Reliability Grade of B, in the 78th national percentile.
What was the worst power outage in Teton County?
The worst outage on record started November 2, 2019, lasting 5 hours and affecting up to 7,112 customers.