County annual report · FIPS 30041
2020 Hill County, MT Power Outage Report
In 2020, customers in Hill County, MT went without power for an average of 4.2 hours, a total of 33K customer-hours (Montana average 5.6 hours). That ranks 28th worst of 50 Montana counties and 1564th of 3,019 nationally.
Compared with MT, the US
Coverage line is EAGLE-I's share of Montana customers tracked each year.
Biggest outages in Hill County, 2020
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | April 4, 2020 12:00 | April 4, 2020 19:45 | 7h 45m | 4,618 | 19K |
| 2 | June 16, 2020 21:15 | June 16, 2020 22:15 | 1h | 1,559 | 1,559 |
| 3 | April 29, 2020 04:00 | April 29, 2020 05:45 | 1h 45m | 1,093 | 1,913 |
| 4 | July 7, 2020 20:15 | July 7, 2020 22:30 | 2h 15m | 980 | 2,174 |
| 5 | January 1, 2020 14:30 | January 1, 2020 16:45 | 2h 15m | 382 | 860 |
| 6 | June 15, 2020 16:45 | June 15, 2020 18:00 | 1h 15m | 279 | 349 |
| 7 | July 29, 2020 04:30 | July 29, 2020 06:00 | 1h 30m | 272 | 408 |
| 8 | February 1, 2020 18:45 | February 2, 2020 03:30 | 8h 45m | 234 | 1,852 |
| 9 | January 4, 2020 21:00 | January 4, 2020 23:45 | 2h 45m | 215 | 546 |
| 10 | October 30, 2020 20:30 | October 30, 2020 23:15 | 2h 45m | 214 | 321 |
Outage episodes by size in 2020: 15 reached 100+ customers, 3 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 Hill County reported on EIA Form 861 for 2020, 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) | 2020 | 2.8 hrs | 1.13 | 2.0 hrs | 1.02 |
| WAPA-- Western Area Power Administration | - | - | - | - | - |
| Hill County 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 2020; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 7,876 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. Hill County has data for 2020–2025.
Cite this report
MassOutage (massoutage.com), Hill County, MT annual power outage report, 2020, 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/2020/montana/hill-county