Mineral CountyPower Outage History
2019–2025 · Montana
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 |
|---|---|---|---|
| Feb 26, 2021 | 11 hrs | 3,207 (84%) | Unnamed event |
| Jul 25, 2024 | 18 hrs | 2,867 (75%) | Excessive Heat |
| Jan 13, 2021 | 22 hrs | 2,260 (59%) | High Wind |
| Nov 16, 2021 | 47 hrs | 2,247 (59%) | High Wind |
| Aug 2, 2021 | 7 hrs | 2,197 (58%) | Unnamed event |
Over the 7 years from 2019 to 2025, Mineral County recorded 173 distinct power outage events, averaging 4.1 hours per event.
The single worst outage on record in Mineral County started February 26, 2021, lasting 11 hours and leaving up to 3,207 customers without power (84% of the county) at its peak.
January has historically been the worst month for outages in Mineral County, with 30 events recorded during that month across the dataset.
Based on this history, Mineral County earns a Reliability Grade of D, placing it in the 39th percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Mineral 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 Mineral County.
| County | Grade | National percentile |
|---|---|---|
| Meagher County | D | 38th |
| Chouteau County | D | 37th |
| Teton County | C | 41st |
| Missoula County | C | 42nd |
| Flathead County | D | 35th |
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 Mineral County?
Between 2019 and 2025, Mineral County recorded 173 outage events, averaging 4.1 hours each.
What is Mineral County's reliability grade?
Mineral County has a Reliability Grade of D, in the 39th national percentile.
What was the worst power outage in Mineral County?
The worst outage on record started February 26, 2021, lasting 11 hours and affecting up to 3,207 customers.