Power Outages in Granite County, MT
Missoula Electric Coop, Inc and NorthWestern Energy LLC - (MT) publish only a system-wide total, not county figures. There is no live feed for Bonneville Power Administration and NorthWestern Energy. In 2025, the average customer here lost power for about 5.8 hours.
Granite County, MT is served by 4 tracked utilities.
Cite this data
- URL
- https://massoutage.com/montana/granite-county
- As of
- Not available
- Publisher
- MassOutage
MassOutage, "Power Outages in Granite County, MT". https://massoutage.com/montana/granite-county
Missoula Electric Coop, Inc and NorthWestern Energy LLC - (MT) publish no county-level figures.
No live feed for Bonneville Power Administration and NorthWestern Energy: outages in theirservice area won't show here.
0.0%of this county's ~2,343 customers are served by utilities with a county-level live feed.
We can't see outages for: Bonneville Power Administration, NorthWestern Energy. Their customers are not in any number on this page; check their own outage maps.
System-wide total only, no county split: Missoula Electric Coop, Inc, NorthWestern Energy LLC - (MT).
| Utility | Feed | Out | Served | % out | Small outages | Incidents | Utility ETR | As of |
|---|---|---|---|---|---|---|---|---|
| Missoula Electric Coop, Inc | Live · total only | not by county | - | - | - | - | - | - |
| NorthWestern Energy LLC - (MT) | Live · total only | not by county | - | - | - | - | - | - |
| Bonneville Power Administration | No live feed | can't see | - | - | - | - | - | - |
| NorthWestern Energy | No live feed | can't see | - | - | - | - | - | - |
Electricity-dependent residents
HHS emPOWER · data October 7, 2026Medicare beneficiaries in Granite Countywho rely on electricity-dependent medical equipment (ventilators, oxygen concentrators, home dialysis, powered wheelchairs, and more). HHS reports counts of 1–10 as “≤11”. Medicare only, so the full at-risk population is larger.
By ZIP code (4)
| ZIP | Power-dependent | Ventilators | O2 concentrators | Home dialysis |
|---|---|---|---|---|
| 59825 | 41 | 0 | 30 | ≤11 |
| 59858 | 33 | 0 | 24 | ≤11 |
| 59832 | 16 | ≤11 | 12 | ≤11 |
| 59837 | ≤11 | 0 | ≤11 | 0 |
Emergency managers can request identified beneficiary lists through their state health department via the HHS emPOWER program.
Outage began, grew, restoration estimate changed, restored: by email, Slack, Teams, Discord or signed webhook, for Granite County or any town and utility in it.
No active NWS alerts for Granite County right now.
Granite County has been under 3 National Weather Service alerts recently, most recently a Winter Storm Warning on October 11, 2026.
- Winter Storm Warning ×1
- Winter Storm Watch ×1
- Winter Weather Advisory ×1
Latest Granite County, MT outage updates
A running log of how this outage has changed, updated automatically as utilities report in.
- RESOLVED
Power restored after 1h 25m
- OUTAGE BEGAN
Outage began: 214 customers out (9.3% of the county)
Hardest-hit cities in Granite County
Where this event is concentrated across the county's towns and townships.
Historical reliability
In 2025, the average customer in Granite County went about 5.8 hours without power. Peak simultaneous outage on record reached 1,904 customers.
The US EIA reports Montana utilities averaged 4.8 hrs without power per customer (SAIDI) in 2025, a cross-check on our county estimate of 5.8 hrs.
Worst year here was 2024 (peak 1,592 customers out) · decade average 9.5 hrs without power per customer/yr.
| Year | Outage events | Peak customers out | Avg hrs/customer |
|---|---|---|---|
| 2019 | 2 | 1 | 0.0 |
| 2020 | 144 | 1,673 | 13.2 |
| 2021 | 145 | 910 | 9.7 |
| 2022 | 125 | 1,904 | 7.7 |
| 2023 | 119 | 1,425 | 5.9 |
| 2024 | 176 | 1,592 | 24.6 |
| 2025 | 147 | 603 | 5.8 |
Cost of power in Granite County
ENERGY & AI DEMAND →Estimated residential electricity price for Granite County, customer-weighted across the utilities serving it (US EIA, 2025). Retail prices aren't published at the county level; this is a derived estimate.
- NorthWestern Energy LLC - (MT)14.4¢333,711 cust
- Missoula Electric Coop, Inc10.9¢14,867 cust
Weighted by each utility's residential customer count (utilities report customers at the state level; a per-county share isn't published). Rising retail prices track a national demand surge; see energy & the data-center boom.
Relatively Low ice storms exposure · 9.5 hrs/yr of outages over the last decade.
FEMA rates this county’s social vulnerability relatively moderate: outages hit harder where communities are less able to respond and recover.
All hazard rankings →Power outages in Granite County: FAQ
- How often does Granite County, MT lose power?
- Based on EAGLE-I records, Granite County, MT logged 147 distinct outage events in 2025, averaging about 5.8 hours without power per customer over the year.
- What was the worst power outage in Granite County, MT?
- The largest tracked outage peaked at 1,904 customers without power, beginning November 5, 2022 and lasting about 9h.
- Is there a power outage in Granite County, MT right now?
- No major outage is currently reported for Granite County, MT. Live coverage depends on whether local utilities report to ODIN.
- Which utilities serve Granite County, MT?
- Tracked electric providers include NorthWestern Energy, NorthWestern Energy LLC - (MT).
Outages are tracked at the county level; these ZIP codes fall within Granite County.
59825, 59832, 59837, 59858
Electric providers serving this county
From EIA-861 service territory, with official reliability where reported.
| Provider | Official SAIDI (EIA) | Live | Report outage |
|---|---|---|---|
| NorthWestern Energy LLC - (MT) | 2.1 hrs | Live · total only | - |
| Missoula Electric Coop, Inc | 22.1 hrs | Live · total only | - |
| Bonneville Power Administration | - | No live feed | - |
| NorthWestern Energy | - | No live feed | - |
Data from DOE/ORNL ODIN, DOE EAGLE-I, EIA Form 861 (utility reliability), EIA electricity retail prices and FEMA National Risk Index, every source we read. Historical figures derive from the DOE/ORNL EAGLE-I dataset (EAGLE-I tracked roughly 0% of Montana customers). Machine-readable data: /api/v1/counties/30039 and /api/v1/counties/30039/history.