County annual report · FIPS 30047
2025 Lake County, MT Power Outage Report
In 2025, customers in Lake County, MT went without power for an average of 4.9 hours, a total of 117K customer-hours (Montana average 6.8 hours). That ranks 28th worst of 51 Montana counties and 1534th 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 Lake 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 16, 2025 06:30 | December 22, 2025 22:15 | 6d 15h | 5,323 | 101K |
| 2 | November 20, 2025 17:00 | November 20, 2025 18:00 | 1h | 1,924 | 1,924 |
| 3 | June 26, 2025 21:00 | June 26, 2025 21:15 | 15m | 1,888 | 472 |
| 4 | April 3, 2025 16:15 | April 3, 2025 19:15 | 3h | 1,516 | 385 |
| 5 | June 29, 2025 23:30 | June 30, 2025 02:45 | 3h 15m | 362 | 542 |
| 6 | July 15, 2025 02:30 | July 15, 2025 11:00 | 8h 30m | 362 | 2,502 |
| 7 | August 20, 2025 05:15 | August 20, 2025 10:00 | 4h 45m | 362 | 1,558 |
| 8 | August 20, 2025 22:30 | August 21, 2025 00:45 | 2h 15m | 362 | 751 |
| 9 | August 27, 2025 04:30 | August 27, 2025 07:15 | 2h 45m | 362 | 988 |
| 10 | August 27, 2025 09:30 | August 27, 2025 11:45 | 2h 15m | 362 | 653 |
Outage episodes by size in 2025: 19 reached 100+ customers, 4 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 Lake 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 |
|---|---|---|---|---|---|
| Missoula Electric Coop, Inc | 2024 | 26.8 hrs | 3.59 | 8.4 hrs | 2.19 |
| Flathead Electric Coop Inc | 2024 | 9.8 hrs | 2.72 | 3.9 hrs | 1.90 |
| USBIA-Mission Valley Power | - | - | - | - | - |
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 ÷ 24,041 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. Lake County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Lake 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/lake-county