Judith Basin CountyPower Outage History
2020–2025 · Montana
Average — typical outage frequency and duration nationally. This county sits in the middle of the national distribution — its outage frequency and duration over the past 12 years are close to the nationwide median, neither notably better nor worse than most other US counties. A typical amount of backup-power preparedness is reasonable here.
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Oct 7, 2021 | 3 hrs | 718 (62%) | Unnamed event |
| Jan 13, 2021 | 9 hrs | 558 (48%) | Unnamed event |
| Jan 30, 2021 | 1 hrs | 537 (47%) | Unnamed event |
| Dec 3, 2020 | 4 hrs | 536 (46%) | Unnamed event |
| Jan 30, 2021 | 3 hrs | 536 (46%) | Unnamed event |
Over the 6 years from 2020 to 2025, Judith Basin County recorded 123 distinct power outage events, averaging 3.4 hours per event.
The single worst outage on record in Judith Basin County started October 7, 2021, lasting 3 hours and leaving up to 718 customers without power (62% of the county) at its peak.
May has historically been the worst month for outages in Judith Basin County, with 17 events recorded during that month across the dataset.
Based on this history, Judith Basin County earns a Reliability Grade of C, placing it in the 49th percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Judith Basin County's outage profile
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Read our mission →Similar counties in Montana
Counties with the closest reliability grade and national percentile to Judith Basin County.
| County | Grade | National percentile |
|---|---|---|
| Valley County | C | 49th |
| Wheatland County | C | 48th |
| Sweet Grass County | C | 54th |
| Powell County | C | 55th |
| Missoula County | C | 42nd |
Most reliable counties in Montana
The top 3 counties in Montana by reliability grade and percentile.
| County | Grade | National percentile |
|---|---|---|
| Powder River County | A | 95th |
| Roosevelt County | A | 94th |
| Fallon County | A | 94th |
Least reliable counties in Montana
The bottom 3 counties in Montana by reliability grade and percentile.
| County | Grade | National percentile |
|---|---|---|
| Lincoln County | F | 14th |
| Sanders County | D | 20th |
| Madison County | D | 31st |
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 Judith Basin County?
Between 2020 and 2025, Judith Basin County recorded 123 outage events, averaging 3.4 hours each.
What is Judith Basin County's reliability grade?
Judith Basin County has a Reliability Grade of C, in the 49th national percentile.
What was the worst power outage in Judith Basin County?
The worst outage on record started October 7, 2021, lasting 3 hours and affecting up to 718 customers.