Liberty CountyPower Outage History
2020–2025 · Montana
Better than average — fewer or shorter outages than most counties. This county's outage history is better than the national median: recorded outages are less frequent and/or shorter in duration than a typical US county experienced over the same 12-year period. It isn't in the top tier nationally, but its track record points to lower-than-average outage risk.
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Oct 23, 2022 | 58 hrs | 1,532 (75%) | Heavy Snow |
| Dec 17, 2025 | 5 hrs | 1,507 (73%) | Heavy Snow |
| Sep 14, 2020 | 5 hrs | 1,138 (55%) | Unnamed event |
| Nov 8, 2020 | 9 hrs | 955 (47%) | Unnamed event |
| May 7, 2024 | 2 hrs | 846 (41%) | High Wind |
Over the 6 years from 2020 to 2025, Liberty County recorded 101 distinct power outage events, averaging 3.3 hours per event.
The single worst outage on record in Liberty County started October 23, 2022 (Heavy Snow), lasting 58 hours and leaving up to 1,532 customers without power (75% of the county) at its peak.
July has historically been the worst month for outages in Liberty County, with 14 events recorded during that month across the dataset.
Based on this history, Liberty County earns a Reliability Grade of B, placing it in the 69th percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Liberty 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 Liberty County.
| County | Grade | National percentile |
|---|---|---|
| Phillips County | B | 69th |
| Wibaux County | B | 69th |
| Cascade County | B | 69th |
| Prairie County | B | 71st |
| Ravalli County | B | 72nd |
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 Liberty County?
Between 2020 and 2025, Liberty County recorded 101 outage events, averaging 3.3 hours each.
What is Liberty County's reliability grade?
Liberty County has a Reliability Grade of B, in the 69th national percentile.
What was the worst power outage in Liberty County?
The worst outage on record started October 23, 2022 (Heavy Snow), lasting 58 hours and affecting up to 1,532 customers.