County annual report · FIPS 30025
2021 Fallon County, MT Power Outage Report
In 2021, customers in Fallon County, MT went without power for an average of 2.6 hours, a total of 5,973 customer-hours (Montana average 5.0 hours). That ranks 32nd worst of 51 Montana counties and 1990th of 2,974 nationally.
Compared with MT, the US and 2020
Coverage line is EAGLE-I's share of Montana customers tracked each year.
Biggest outages in Fallon County, 2021
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | September 28, 2021 20:15 | September 28, 2021 21:00 | 45m | 1,179 | 621 |
| 2 | June 9, 2021 18:00 | June 14, 2021 13:45 | 4d 19h | 623 | 1,834 |
| 3 | July 21, 2021 14:30 | July 22, 2021 09:15 | 18h 45m | 435 | 1,067 |
| 4 | July 8, 2021 04:00 | July 8, 2021 06:15 | 2h 15m | 163 | 159 |
| 5 | February 23, 2021 16:00 | February 23, 2021 16:45 | 45m | 105 | 78 |
| 6 | December 1, 2021 07:15 | December 1, 2021 09:15 | 2h | 104 | 206 |
| 7 | December 3, 2021 07:15 | December 3, 2021 10:30 | 3h 15m | 104 | 335 |
| 8 | October 8, 2021 09:30 | October 8, 2021 10:00 | 30m | 100 | 50 |
| 9 | February 23, 2021 08:30 | February 23, 2021 09:30 | 1h | 89 | 46 |
| 10 | January 14, 2021 07:00 | January 14, 2021 09:15 | 2h 15m | 83 | 58 |
Outage episodes by size in 2021: 8 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 Fallon County reported on EIA Form 861 for 2021, 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 |
|---|---|---|---|---|---|
| WAPA-- Western Area Power Administration | - | - | - | - | - |
| Montana-Dakota Utilities Co | - | - | - | - | - |
| 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 76% of Montana's customers in 2021; 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, 2021, 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/). https://massoutage.com/reports/2021/montana/fallon-county