County annual report · FIPS 30005
2025 Blaine County, MT Power Outage Report
In 2025, customers in Blaine County, MT went without power for an average of 18.5 hours, a total of 51K customer-hours (Montana average 6.8 hours). That ranks 9th worst of 51 Montana counties and 387th 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 Blaine 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 | December 17, 2025 19:45 | December 19, 2025 15:30 | 1d 19h | 4,330 | 15K |
| 2 | December 26, 2025 17:45 | December 26, 2025 20:45 | 3h | 2,540 | 6,908 |
| 3 | November 19, 2025 03:45 | November 19, 2025 11:30 | 7h 45m | 1,568 | 11K |
| 4 | August 17, 2025 05:15 | August 17, 2025 08:45 | 3h 30m | 1,238 | 4,333 |
| 5 | July 15, 2025 04:15 | July 15, 2025 05:45 | 1h 30m | 1,234 | 1,707 |
| 6 | July 27, 2025 13:45 | July 27, 2025 17:30 | 3h 45m | 1,234 | 4,628 |
| 7 | August 5, 2025 03:15 | August 5, 2025 07:45 | 4h 30m | 695 | 1,055 |
| 8 | November 27, 2025 18:00 | November 27, 2025 23:30 | 5h 30m | 422 | 727 |
| 9 | August 1, 2025 10:30 | August 1, 2025 12:30 | 2h | 395 | 453 |
| 10 | April 14, 2025 22:00 | April 15, 2025 01:30 | 3h 30m | 229 | 468 |
Outage episodes by size in 2025: 12 reached 100+ customers, 6 reached 1,000+ customers, 0 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 Blaine 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 |
| WAPA-- Western Area Power Administration | - | - | - | - | - |
| Fergus Electric Coop, Inc | - | - | - | - | - |
| Hill County Electric Coop, Inc | - | - | - | - | - |
| Big Flat 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 ÷ 2,740 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. Blaine County has data for 2020–2025.
Cite this report
MassOutage (massoutage.com), Blaine 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/blaine-county