massoutage

County annual report · FIPS 30027

2019 Fergus County, MT Power Outage Report

In 2019, customers in Fergus County, MT went without power for an average of 0.0 hours, a total of 15 customer-hours (Montana average 0.6 hours). That ranks 27th worst of 38 Montana counties and 2907th of 2,945 nationally.

Summary data CSVJSON
Avg hrs / customer
0.0
5,384 customers
Customer-hours out
15
Peak customers out
4
Outages ≥1,000 out
0
0 of 10,000+ · 1 total
Longest outage
3h 45m
began December 30, 2019
Rank in state
27th/38
2907th of 2,945 US

Compared with MT, the US

Fergus County, MT average hours without power per customer compared with state and national averages, 2019Fergus County 0.0 hours, Montana average 0.6 hours, US average 4.7 hoursFergus CountyFergus County0.0hMontana averageMontana average0.6hUS averageUS average4.7h
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Average hours without power per customer in 2019.

Month by month

CSVJSON
Fergus County, MT customer-hours without power by month, 2019Jan 0, Feb 0, Mar 0, Apr 0, May 0, Jun 0, Jul 0, Aug 0, Sep 0, Oct 0, Nov 0, Dec 150510150Jan0Feb0Mar0Apr0May0Jun0Jul0Aug0Sep0Oct0Nov15Dec
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Customer-hours; December was the worst month.

Fergus County year over year

CSVJSON
Fergus County, MT: average hours without power per customer by year2015: no data; 2016: no data; 2017: no data; 2018: no data; 2019: 0.0h, coverage 75%; 2020: 7.3h, coverage 76%; 2021: 3.6h, coverage 76%; 2022: 4.7h, coverage 76%; 2023: 1.7h; 2024: 2.8h; 2025: 4.4h024680%50%100%n/a2015n/a2016n/a2017n/a20180.0h20197.3h20203.6h20214.7h20221.7h20232.8h20244.4h2025
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Average hours without power per customer. Line: EAGLE-I coverage, share of customers tracked (right axis).

Coverage line is EAGLE-I's share of Montana customers tracked each year.

Biggest outages in Fergus County, 2019

The 1 outage episodes with the most customers out at once. Times are UTC.

CSVJSON
#Started (UTC)Ended (UTC)DurationPeak outCustomer-hours
1December 30, 2019 20:15December 31, 2019 00:003h 45m415

Outage episodes by size in 2019: 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 Fergus County reported on EIA Form 861 for 2019, or their most recent earlier filing. Utility-wide figures, not county-specific.

CSVJSON
UtilityEIA yearSAIDISAIFISAIDI excl. major eventsSAIFI excl. major events
NorthWestern Energy LLC - (MT)20181.7 hrs1.081.7 hrs1.08
NorthWestern Energy-----
Fergus Electric Coop, Inc-----
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 75% of Montana's customers in 2019; utilities it does not see are not counted.
  • Hours per customer = outage customer-minutes ÷ 5,384 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. Fergus County has data for 2019–2025.

Cite this report

MassOutage (massoutage.com), Fergus County, MT annual power outage report, 2019, 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/2019/montana/fergus-county

summary CSVJSONyears CSVJSONmonths CSVJSONevents CSVJSONutilities CSVJSON
Fergus County by year:202520242023202220212020
Live outages in Fergus County2019 Montana report2019 US report