County annual report · FIPS 30025
2025 Fallon County, MT Power Outage Report
In 2025, customers in Fallon County, MT went without power for an average of 0.1 hours, a total of 212 customer-hours (Montana average 6.8 hours). That ranks 49th worst of 51 Montana counties and 2945th 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 Fallon County, 2025
The 6 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | September 17, 2025 23:15 | September 17, 2025 23:30 | 15m | 80 | 20 |
| 2 | September 11, 2025 08:00 | September 11, 2025 08:30 | 30m | 73 | 22 |
| 3 | December 18, 2025 03:30 | December 18, 2025 06:45 | 3h 15m | 28 | 51 |
| 4 | December 18, 2025 07:30 | December 18, 2025 07:45 | 15m | 25 | 6 |
| 5 | March 4, 2025 08:15 | March 4, 2025 12:45 | 4h 30m | 22 | 99 |
| 6 | June 9, 2025 18:00 | June 9, 2025 20:00 | 2h | 7 | 14 |
Outage episodes by size in 2025: 0 reached 100+ customers, 0 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 Fallon 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 |
|---|---|---|---|---|---|
| Montana-Dakota Utilities Co | 2024 | 2.9 hrs | 1.26 | 2.1 hrs | 1.10 |
| WAPA-- Western Area Power Administration | - | - | - | - | - |
| Tongue River Electric Coop Inc | - | - | - | - | - |
| Goldenwest Electric Coop, Inc | - | - | - | - | - |
| Southeast 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 ÷ 2,280 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. Fallon County has data for 2017–2025.
Cite this report
MassOutage (massoutage.com), Fallon 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/fallon-county