County annual report · FIPS 30071
2025 Phillips County, MT Power Outage Report
In 2025, customers in Phillips County, MT went without power for an average of 31.1 hours, a total of 62K customer-hours (Montana average 6.8 hours). That ranks 4th worst of 51 Montana counties and 179th 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 Phillips 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 02:15 | 1d 6h | 3,209 | 15K |
| 2 | December 26, 2025 17:45 | December 26, 2025 23:00 | 5h 15m | 2,389 | 5,719 |
| 3 | July 27, 2025 02:45 | July 27, 2025 20:30 | 17h 45m | 2,313 | 17K |
| 4 | July 15, 2025 03:30 | July 15, 2025 05:45 | 2h 15m | 2,026 | 2,906 |
| 5 | August 5, 2025 03:15 | August 5, 2025 04:45 | 1h 30m | 1,942 | 2,912 |
| 6 | August 18, 2025 20:15 | August 18, 2025 21:30 | 1h 15m | 1,875 | 2,344 |
| 7 | August 1, 2025 04:15 | August 1, 2025 09:00 | 4h 45m | 1,716 | 4,126 |
| 8 | July 3, 2025 02:30 | July 3, 2025 09:30 | 7h | 780 | 3,626 |
| 9 | December 11, 2025 13:45 | December 12, 2025 22:15 | 1d 8h | 633 | 2,729 |
| 10 | September 18, 2025 15:30 | September 18, 2025 17:00 | 1h 30m | 367 | 536 |
Outage episodes by size in 2025: 16 reached 100+ customers, 7 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 Phillips 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 | - | - | - | - | - |
| NorthWestern Energy | - | - | - | - | - |
| NorVal Electric Cooperative, 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 ÷ 1,992 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. Phillips County has data for 2019–2025.
Cite this report
MassOutage (massoutage.com), Phillips 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/phillips-county