County annual report · FIPS 30023
2025 Deer Lodge County, MT Power Outage Report
In 2025, customers in Deer Lodge County, MT went without power for an average of 2.4 hours, a total of 16K customer-hours (Montana average 6.8 hours). That ranks 38th worst of 51 Montana counties and 2285th 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 Deer Lodge 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 16:30 | December 18, 2025 06:15 | 13h 45m | 1,442 | 4,870 |
| 2 | July 9, 2025 15:15 | July 10, 2025 05:30 | 14h 15m | 813 | 2,182 |
| 3 | May 27, 2025 02:30 | May 27, 2025 05:45 | 3h 15m | 316 | 715 |
| 4 | June 24, 2025 13:15 | June 24, 2025 18:00 | 4h 45m | 314 | 363 |
| 5 | March 21, 2025 02:00 | March 21, 2025 03:45 | 1h 45m | 312 | 546 |
| 6 | October 26, 2025 15:00 | October 26, 2025 19:30 | 4h 30m | 226 | 800 |
| 7 | July 5, 2025 03:15 | July 5, 2025 05:45 | 2h 30m | 211 | 528 |
| 8 | October 13, 2025 09:15 | October 13, 2025 21:15 | 12h | 155 | 1,169 |
| 9 | February 17, 2025 18:15 | February 17, 2025 18:30 | 15m | 144 | 36 |
| 10 | May 4, 2025 23:45 | May 5, 2025 03:00 | 3h 15m | 138 | 380 |
Outage episodes by size in 2025: 13 reached 100+ customers, 1 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 Deer Lodge 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 |
| Bonneville Power Administration | - | - | - | - | - |
| NorthWestern Energy | - | - | - | - | - |
| Vigilante 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 ÷ 6,663 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. Deer Lodge County has data for 2019–2025.
Cite this report
MassOutage (massoutage.com), Deer Lodge 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/deer-lodge-county