Gallatin CountyPower Outage History
What this grade means
Top 20% most reliable nationally — infrequent, short outages. This county ranks in the most reliable fifth of all US counties in our dataset, based on 12 years of real DOE outage records: outages happen less often here, and when they do occur they tend to be resolved quickly compared to the rest of the country. Baseline outage risk is low, though a severe local storm can still occasionally cause a longer-than-usual outage regardless of the long-term track record.
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Nov 24, 2025 | <1 hr | 13,980 (14%) | Thunderstorm Wind |
| Nov 24, 2025 | 1 hrs | 13,958 (14%) | Thunderstorm Wind |
| Aug 29, 2024 | 4 hrs | 12,843 (13%) | Unnamed event |
| Sep 12, 2024 | 9 hrs | 11,492 (12%) | Wildfire |
| Oct 16, 2022 | 6 hrs | 11,296 (11%) | Unnamed event |
Was There an Outage on a Specific Date?
Pick a date to see whether a power outage was recorded for Gallatin County, Montana that day.
Over the 7 years from 2019 to 2025, Gallatin County recorded 301 distinct power outage events, averaging 3.2 hours per event.
The single worst outage on record in Gallatin County started November 24, 2025 (Thunderstorm Wind), lasting less than 1 hour and leaving up to 13,980 customers without power (14% of the county) at its peak.
July has historically been the worst month for outages in Gallatin County, with 46 events recorded during that month across the dataset.
Based on this history, Gallatin County earns a Reliability Grade of A, placing it in the 92nd percentile nationally for grid reliability (higher percentile = more reliable).
Similar counties in Montana
Counties with the closest reliability grade and national percentile to Gallatin County.
| County | Grade | National percentile |
|---|---|---|
| Stillwater County | A | 90th |
| Dawson County | A | 93rd |
| Big Horn County | A | 94th |
| Fallon County | A | 94th |
| Roosevelt County | A | 94th |
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 Gallatin County?
Between 2019 and 2025, Gallatin County recorded 301 outage events, averaging 3.2 hours each.
What is Gallatin County's reliability grade?
Gallatin County has a Reliability Grade of A, in the 92nd national percentile.
What was the worst power outage in Gallatin County?
The worst outage on record started November 24, 2025 (Thunderstorm Wind), lasting less than 1 hour and affecting up to 13,980 customers.