County annual report · FIPS 19079
2018 Hamilton County, IA Power Outage Report
In 2018, customers in Hamilton County, IA went without power for an average of 1.1 hours, a total of 11K customer-hours (Iowa average 2.2 hours). That ranks 79th worst of 99 Iowa counties and 2253rd 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 Hamilton 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 | October 17, 2018 20:15 | October 17, 2018 21:30 | 1h 15m | 1,084 | 1,139 |
| 2 | April 14, 2018 01:00 | April 14, 2018 17:15 | 16h 15m | 565 | 3,818 |
| 3 | May 2, 2018 03:15 | May 2, 2018 06:15 | 3h | 413 | 1,128 |
| 4 | November 21, 2018 10:15 | November 21, 2018 12:00 | 1h 45m | 369 | 646 |
| 5 | April 11, 2018 01:45 | April 11, 2018 04:00 | 2h 15m | 183 | 412 |
| 6 | June 6, 2018 22:00 | June 7, 2018 06:00 | 8h | 153 | 631 |
| 7 | August 28, 2018 19:45 | August 29, 2018 01:45 | 6h | 146 | 167 |
| 8 | May 29, 2018 18:30 | May 29, 2018 21:45 | 3h 15m | 97 | 208 |
| 9 | March 24, 2018 09:30 | March 24, 2018 20:45 | 11h 15m | 85 | 190 |
| 10 | August 8, 2018 16:00 | August 8, 2018 18:15 | 2h 15m | 57 | 58 |
Outage episodes by size in 2018: 7 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 Hamilton 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 |
| 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 89% of Iowa's customers in 2018; 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, 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/hamilton-county