County annual report · FIPS 19137
2021 Montgomery County, IA Power Outage Report
In 2021, customers in Montgomery County, IA went without power for an average of 3.0 hours, a total of 17K customer-hours (Iowa average 2.7 hours). That ranks 45th worst of 99 Iowa counties and 1823rd of 2,974 nationally.
Compared with IA, the US and 2020
Coverage line is EAGLE-I's share of Iowa customers tracked each year.
Biggest outages in Montgomery 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 | December 1, 2021 14:00 | December 1, 2021 22:45 | 8h 45m | 4,346 | 4,271 |
| 2 | December 15, 2021 22:30 | December 18, 2021 07:15 | 2d 8h | 715 | 5,823 |
| 3 | March 19, 2021 08:00 | March 19, 2021 09:45 | 1h 45m | 221 | 387 |
| 4 | July 31, 2021 02:15 | July 31, 2021 17:00 | 14h 45m | 219 | 773 |
| 5 | June 18, 2021 14:00 | June 18, 2021 19:15 | 5h 15m | 206 | 57 |
| 6 | June 18, 2021 12:00 | June 18, 2021 12:15 | 15m | 205 | 51 |
| 7 | June 30, 2021 19:00 | June 30, 2021 19:15 | 15m | 205 | 51 |
| 8 | July 13, 2021 20:00 | July 13, 2021 20:15 | 15m | 205 | 51 |
| 9 | July 10, 2021 05:45 | July 12, 2021 12:45 | 2d 7h | 195 | 2,175 |
| 10 | March 31, 2021 14:30 | March 31, 2021 16:45 | 2h 15m | 161 | 144 |
Outage episodes by size in 2021: 11 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 Montgomery 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 |
|---|---|---|---|---|---|
| MidAmerican Energy Co | 2021 | 1.9 hrs | 1.04 | 75 min | 0.74 |
| Southwest Iowa Rural Elec Coop | 2018 | 2.4 hrs | 1.69 | 1.6 hrs | 1.21 |
| Interstate Power and Light Co | - | - | - | - | - |
| City of Stanton - (IA) | - | - | - | - | - |
| City of Villisca - (IA) | - | - | - | - | - |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about 91% of Iowa's customers in 2021; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 5,724 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. Montgomery County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Montgomery County, IA 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/iowa/montgomery-county