County annual report · FIPS 19079
2020 Hamilton County, IA Power Outage Report
In 2020, customers in Hamilton County, IA went without power for an average of 6.8 hours, a total of 63K customer-hours (Iowa average 27.4 hours). That ranks 25th worst of 99 Iowa counties and 1111th of 3,019 nationally.
Compared with IA, the US and 2019
Coverage line is EAGLE-I's share of Iowa customers tracked each year.
Biggest outages in Hamilton 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 3, 2020 00:45 | April 3, 2020 02:15 | 1h 30m | 1,431 | 1,125 |
| 2 | August 10, 2020 15:15 | August 19, 2020 00:45 | 8d 9h | 1,142 | 43K |
| 3 | January 25, 2020 05:00 | January 25, 2020 10:00 | 5h | 1,108 | 5,540 |
| 4 | June 17, 2020 07:45 | June 17, 2020 10:30 | 2h 45m | 1,098 | 2,745 |
| 5 | November 4, 2020 09:30 | November 4, 2020 11:45 | 2h 15m | 1,096 | 2,465 |
| 6 | June 3, 2020 18:45 | June 4, 2020 00:00 | 5h 15m | 685 | 2,570 |
| 7 | January 22, 2020 20:30 | January 22, 2020 23:00 | 2h 30m | 283 | 525 |
| 8 | July 29, 2020 03:15 | July 29, 2020 11:45 | 8h 30m | 280 | 148 |
| 9 | July 25, 2020 15:00 | July 25, 2020 17:45 | 2h 45m | 279 | 446 |
| 10 | November 13, 2020 17:30 | November 13, 2020 19:15 | 1h 45m | 178 | 295 |
Outage episodes by size in 2020: 18 reached 100+ customers, 5 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 Hamilton 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 |
|---|---|---|---|---|---|
| MidAmerican Energy Co | 2020 | 18.3 hrs | 1.43 | 82 min | 0.79 |
| Interstate Power and Light Co | - | - | - | - | - |
| Alliant Energy (Interstate Power & Light) | - | - | - | - | - |
| Midland Power Coop | - | - | - | - | - |
| Prairie Energy Coop | - | - | - | - | - |
| City of Story City - (IA) | - | - | - | - | - |
| Cass Electric Coop | - | - | - | - | - |
| City of Stratford - (IA) | - | - | - | - | - |
| City of Ellsworth - (IA) | - | - | - | - | - |
| City of Stanhope - (IA) | - | - | - | - | - |
| City of Webster City - (IA) | - | - | - | - | - |
| Pleasant Hill Community Line | - | - | - | - | - |
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 2020; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 9,205 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. Hamilton County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Hamilton County, IA 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/iowa/hamilton-county