County annual report · FIPS 30007
2021 Broadwater County, MT Power Outage Report
In 2021, customers in Broadwater County, MT went without power for an average of 10.9 hours, a total of 15K customer-hours (Montana average 5.0 hours). That ranks 12th worst of 51 Montana counties and 729th 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 Broadwater 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 | June 4, 2021 00:00 | June 4, 2021 07:15 | 7h 15m | 2,279 | 6,328 |
| 2 | March 29, 2021 09:30 | March 30, 2021 21:45 | 1d 12h | 1,177 | 1,916 |
| 3 | July 2, 2021 23:45 | July 3, 2021 06:00 | 6h 15m | 274 | 1,404 |
| 4 | July 16, 2021 01:00 | July 16, 2021 03:00 | 2h | 187 | 286 |
| 5 | July 7, 2021 22:45 | July 8, 2021 07:00 | 8h 15m | 124 | 513 |
| 6 | December 11, 2021 23:30 | December 12, 2021 05:30 | 6h | 115 | 496 |
| 7 | June 8, 2021 13:45 | June 8, 2021 16:15 | 2h 30m | 106 | 265 |
| 8 | July 20, 2021 13:45 | July 20, 2021 16:15 | 2h 30m | 106 | 238 |
| 9 | September 23, 2021 18:45 | September 23, 2021 22:45 | 4h | 99 | 368 |
| 10 | January 13, 2021 20:00 | January 14, 2021 18:15 | 22h 15m | 96 | 523 |
Outage episodes by size in 2021: 8 reached 100+ customers, 2 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 Broadwater 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 |
|---|---|---|---|---|---|
| NorthWestern Energy LLC - (MT) | 2021 | 2.5 hrs | 1.37 | 2.1 hrs | 1.18 |
| Bonneville Power Administration | - | - | - | - | - |
| 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 76% of Montana's customers in 2021; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 1,412 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. Broadwater County has data for 2019–2025.
Cite this report
MassOutage (massoutage.com), Broadwater 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/); EIA Form 861 (utility reliability) (https://www.eia.gov/electricity/data/eia861/). https://massoutage.com/reports/2021/montana/broadwater-county