Power CountyPower Outage History
2015–2025 · Idaho
Worse than average — more frequent or longer outages than most counties.
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Oct 14, 2025 | 2 hrs | 3,827 (89%) | Unnamed event |
| Dec 18, 2020 | 3 hrs | 3,598 (84%) | Unnamed event |
| Oct 4, 2021 | <1 hr | 3,500 (82%) | Unnamed event |
| Sep 9, 2021 | 2 hrs | 3,269 (76%) | Unnamed event |
| Nov 18, 2020 | <1 hr | 3,230 (75%) | Winter Weather |
Over the 11 years from 2015 to 2025, Power County recorded 470 distinct power outage events, averaging 2.4 hours per event.
The single worst outage on record in Power County started October 14, 2025, lasting 2 hours and leaving up to 3,827 customers without power (89% of the county) at its peak.
October has historically been the worst month for outages in Power County, with 51 events recorded during that month across the dataset.
Based on this history, Power County earns a Reliability Grade of D, placing it in the 22nd percentile nationally for grid reliability (higher percentile = more reliable).
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Similar counties in Idaho
Counties with the closest reliability grade and national percentile to Power County.
| County | Grade | National percentile |
|---|---|---|
| Shoshone County | D | 21st |
| Idaho County | F | 17th |
| Adams County | D | 27th |
| Butte County | D | 27th |
| Boundary County | F | 17th |
Most reliable counties in Idaho
The top 3 counties in Idaho by reliability grade and percentile.
| County | Grade | National percentile |
|---|---|---|
| Minidoka County | A | 95th |
| Camas County | A | 92nd |
| Ada County | A | 92nd |
Least reliable counties in Idaho
The bottom 3 counties in Idaho by reliability grade and percentile.
| County | Grade | National percentile |
|---|---|---|
| Clearwater County | F | 3rd |
| Bonner County | F | 10th |
| Boise County | F | 14th |
Most reliable counties nationally
The top 3 counties nationally by reliability grade and percentile.
| County | State | Grade | National percentile |
|---|---|---|---|
| Clay County | South Dakota | A | 100th |
| Clearwater County | Minnesota | A | 99th |
| Limestone County | Alabama | A | 99th |
Least reliable counties nationally
The bottom 3 counties nationally by reliability grade and percentile.
| County | State | Grade | National percentile |
|---|---|---|---|
| Clay County | West Virginia | F | 0th |
| Lincoln County | West Virginia | F | 0th |
| Cameron Parish | Louisiana | F | 0th |
FAQ
How often does power go out in Power County?
Between 2015 and 2025, Power County recorded 470 outage events, averaging 2.4 hours each.
What is Power County's reliability grade?
Power County has a Reliability Grade of D, in the 22nd national percentile.
What was the worst power outage in Power County?
The worst outage on record started October 14, 2025, lasting 2 hours and affecting up to 3,827 customers.