County annual report · FIPS 30031
2025 Gallatin County, MT Power Outage Report
In 2025, customers in Gallatin County, MT went without power for an average of 1.7 hours, a total of 168K customer-hours (Montana average 6.8 hours). That ranks 39th worst of 51 Montana counties and 2531st of 3,000 nationally.
Compared with MT, the US and 2024
Coverage line is EAGLE-I's share of Montana customers tracked each year.
Biggest outages in Gallatin County, 2025
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | November 24, 2025 19:30 | November 25, 2025 02:00 | 6h 30m | 13,980 | 28K |
| 2 | September 24, 2025 14:30 | September 24, 2025 18:45 | 4h 15m | 8,289 | 9,703 |
| 3 | December 17, 2025 15:45 | December 21, 2025 17:30 | 4d 1h | 4,220 | 40K |
| 4 | August 7, 2025 20:45 | August 8, 2025 09:45 | 13h | 3,662 | 6,531 |
| 5 | June 9, 2025 21:45 | June 10, 2025 01:45 | 4h | 3,655 | 6,045 |
| 6 | May 5, 2025 23:00 | May 6, 2025 13:30 | 14h 30m | 1,701 | 738 |
| 7 | July 24, 2025 07:30 | July 24, 2025 10:30 | 3h | 1,699 | 5,097 |
| 8 | October 13, 2025 13:45 | October 14, 2025 01:30 | 11h 45m | 1,598 | 1,627 |
| 9 | July 10, 2025 12:30 | July 11, 2025 01:00 | 12h 30m | 1,577 | 2,287 |
| 10 | January 3, 2025 16:45 | January 3, 2025 17:15 | 30m | 1,570 | 485 |
Outage episodes by size in 2025: 70 reached 100+ customers, 16 reached 1,000+ customers, 1 reached 10,000+ customers.
Utility reliability filed with the EIA
SAIDI (average outage time per customer) and SAIFI (average interruptions per customer) that utilities serving Gallatin County reported on EIA Form 861 for 2025, or their most recent earlier filing. Utility-wide figures, not county-specific.
| Utility | EIA year | SAIDI | SAIFI | SAIDI excl. major events | SAIFI excl. major events |
|---|---|---|---|---|---|
| NorthWestern Energy LLC - (MT) | 2024 | 3.9 hrs | 1.30 | 2.0 hrs | 0.95 |
| Fall River Rural Elec Coop Inc | 2024 | 14 min | 0.11 | 10 min | 0.08 |
| NorthWestern Energy | - | - | - | - | - |
| Vigilante Electric Coop, Inc | - | - | - | - | - |
| Park Electric Coop Inc | - | - | - | - | - |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about n/a of Montana's customers in 2025; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 96,603 customers (ORNL modeled county customer count), including major storm days. It is comparable across counties but is not the SAIDI a utility files.
- An outage event is a continuous stretch with customers out; counts at 100, 1,000 and 10,000+ use its peak.
- Years loaded: 2015–2025. Gallatin County has data for 2019–2025.
Cite this report
MassOutage (massoutage.com), Gallatin County, MT annual power outage report, 2025, data as of Oct 3, 2026 02:41 UTC, sources: DOE EAGLE-I (https://eagle-i.doe.gov/); EAGLE-I modeled customer counts (MCC) (https://figshare.com/); EIA Form 861 (utility reliability) (https://www.eia.gov/electricity/data/eia861/). https://massoutage.com/reports/2025/montana/gallatin-county