County annual report · FIPS 19137
2018 Montgomery County, IA Power Outage Report
In 2018, customers in Montgomery County, IA went without power for an average of 2.3 hours, a total of 13K customer-hours (Iowa average 2.2 hours). That ranks 43rd worst of 99 Iowa counties and 1733rd of 2,798 nationally.
Compared with IA, the US and 2017
Coverage line is EAGLE-I's share of Iowa customers tracked each year.
Biggest outages in Montgomery County, 2018
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 2, 2018 01:30 | September 4, 2018 16:00 | 2d 14h | 1,388 | 3,364 |
| 2 | June 11, 2018 16:30 | June 12, 2018 22:30 | 1d 6h | 560 | 2,528 |
| 3 | March 16, 2018 16:30 | March 16, 2018 23:00 | 6h 30m | 549 | 834 |
| 4 | June 2, 2018 07:00 | June 2, 2018 22:15 | 15h 15m | 280 | 1,239 |
| 5 | October 4, 2018 00:30 | October 4, 2018 06:15 | 5h 45m | 258 | 903 |
| 6 | March 5, 2018 12:30 | March 5, 2018 14:30 | 2h | 251 | 198 |
| 7 | January 1, 2018 07:30 | January 1, 2018 11:30 | 4h | 250 | 450 |
| 8 | April 15, 2018 00:30 | April 15, 2018 04:15 | 3h 45m | 245 | 690 |
| 9 | January 26, 2018 16:00 | January 26, 2018 17:30 | 1h 30m | 221 | 222 |
| 10 | August 31, 2018 19:30 | September 1, 2018 00:00 | 4h 30m | 163 | 132 |
Outage episodes by size in 2018: 12 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 2018, 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 | 2018 | 1.9 hrs | 1.18 | 75 min | 0.96 |
| 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 89% of Iowa's customers in 2018; 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, 2018, 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/2018/iowa/montgomery-county