Power outages in Granite County, MT
We don't have a live outage feed for the utilities serving Granite County yet. NorthWestern Energy LLC - (MT), Missoula Electric Coop, Inc and Bonneville Power Administration serve this county.
Right now
No live outage data for Granite County yet.
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This utility doesn't publish outage data we can read automatically, so it isn't in our totals. Its own outage map has its current outages.i
From EIA Form 861, the U.S. Energy Information Administration's yearly survey of every electric utility and the areas it serves.i
This utility doesn't publish outage data we can read automatically, so it isn't in our totals. Its own outage map has its current outages.i
From EIA Form 861, the U.S. Energy Information Administration's yearly survey of every electric utility and the areas it serves.i
This utility doesn't publish outage data we can read automatically, so it isn't in our totals. Its own outage map has its current outages.i
From EIA Form 861, the U.S. Energy Information Administration's yearly survey of every electric utility and the areas it serves.Outage map
Outage history in Granite County
2014–2025 recordGranite County averaged 14.3 significant outages a year in 2023–2025, more than most Montana counties.
In the 12 months to December 2025, there were 13. Half were over within 2 hours; the longest lasted 10 hours, starting December 17, 2025.
The largest on record began November 5, 2022, with 1,904 customers out at once.
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At least 1% of the area's customers, and at least 100, without power at the same time. Outages less than 6 hours apart count as one.i
Half of significant outages here ended sooner than this, and half lasted longer.| Largest events (start) | Peak out | LastediHow long this area stayed at or above the significant-outage line, not how long any one home was without power. | Customer-hoursiCustomers out multiplied by hours out, added up over the event. 1,000 customers out for 3 hours is 3,000 customer-hours. |
|---|---|---|---|
| November 5, 2022 | 1,904 | 3 hours | 3,441 |
| May 15, 2020 | 1,673 | 8 hours | 6,987 |
| May 23, 2024 | 1,592 | 12 hours | 10,699 |
| February 3, 2024 | 1,446 | 4 hours | 5,783 |
| May 3, 2023 | 1,425 | 1 hour | 1,425 |
Recorded outages from EAGLE-I, Oak Ridge National Laboratory (CC BY 4.0).i
From EAGLE-I, Oak Ridge National Laboratory's record of utility outage data every 15 minutes since 2014 (CC BY 4.0). It covered about 9 in 10 U.S. customers.
Cities in Granite County
Nearby counties
Utilities
- NorthWestern Energy LLC - (MT) no live feed
- Missoula Electric Coop, Inc no live feed
- Bonneville Power Administration no live feed
- All Montana outages