Adams CountyPower Outage History
2015–2025 · Idaho
Worse than average — more frequent or longer outages than most counties. This county's recorded history shows more frequent outages and/or longer restoration times than most US counties over the same 12-year period. If you live here, it's worth taking backup power more seriously than an average household would.
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Nov 18, 2020 | 2 hrs | 3,127 (100%) | Unnamed event |
| Nov 13, 2021 | 1 hrs | 2,724 (87%) | Unnamed event |
| Jun 17, 2020 | 3 hrs | 2,521 (81%) | High Wind |
| Sep 16, 2015 | 3 hrs | 2,366 (76%) | Unnamed event |
| Nov 29, 2018 | <1 hr | 2,029 (65%) | Unnamed event |
Over the 11 years from 2015 to 2025, Adams County recorded 396 distinct power outage events, averaging 3.0 hours per event.
The single worst outage on record in Adams County started November 18, 2020, lasting 2 hours and leaving up to 3,127 customers without power (100% of the county) at its peak.
July has historically been the worst month for outages in Adams County, with 53 events recorded during that month across the dataset.
Based on this history, Adams County earns a Reliability Grade of D, placing it in the 27th percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Adams County's outage profile
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Read our mission →Similar counties in Idaho
Counties with the closest reliability grade and national percentile to Adams County.
| County | Grade | National percentile |
|---|---|---|
| Butte County | D | 27th |
| Power County | D | 22nd |
| Valley County | D | 32nd |
| Shoshone County | D | 21st |
| Latah County | D | 34th |
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 Adams County?
Between 2015 and 2025, Adams County recorded 396 outage events, averaging 3.0 hours each.
What is Adams County's reliability grade?
Adams County has a Reliability Grade of D, in the 27th national percentile.
What was the worst power outage in Adams County?
The worst outage on record started November 18, 2020, lasting 2 hours and affecting up to 3,127 customers.