County annual report · FIPS 19023
2025 Butler County, IA Power Outage Report
In 2025, customers in Butler County, IA went without power for an average of 14.1 hours, a total of 68K customer-hours (Iowa average 2.9 hours). That ranks 4th worst of 99 Iowa counties and 544th of 3,000 nationally.
Compared with IA, the US and 2024
Coverage line is EAGLE-I's share of Iowa customers tracked each year.
Biggest outages in Butler County, 2025
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | July 29, 2025 05:45 | July 31, 2025 11:30 | 2d 5h | 3,840 | 52K |
| 2 | March 4, 2025 20:30 | March 5, 2025 02:15 | 5h 45m | 891 | 1,406 |
| 3 | December 19, 2025 12:15 | December 19, 2025 13:45 | 1h 30m | 602 | 753 |
| 4 | March 15, 2025 00:15 | March 15, 2025 02:30 | 2h 15m | 489 | 387 |
| 5 | May 15, 2025 19:30 | May 15, 2025 21:30 | 2h | 487 | 264 |
| 6 | May 16, 2025 18:30 | May 16, 2025 19:45 | 1h 15m | 472 | 565 |
| 7 | May 16, 2025 20:45 | May 16, 2025 21:15 | 30m | 472 | 236 |
| 8 | July 19, 2025 10:30 | July 21, 2025 13:45 | 2d 3h | 251 | 1,590 |
| 9 | June 20, 2025 12:45 | June 20, 2025 18:15 | 5h 30m | 203 | 311 |
| 10 | May 19, 2025 14:30 | May 20, 2025 11:30 | 21h | 180 | 1,664 |
Outage episodes by size in 2025: 14 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 Butler County reported on EIA Form 861 for 2025, 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 | 2024 | 5.5 hrs | 1.42 | 1.7 hrs | 0.94 |
| Butler County Rural Elec Coop - (IA) | 2024 | 86 min | 0.75 | 66 min | 0.64 |
| Interstate Power and Light Co | - | - | - | - | - |
| Alliant Energy (Interstate Power & Light) | - | - | - | - | - |
| Franklin Rural Electric Coop - (IA) | - | - | - | - | - |
| Grundy County Rural Elec Coop | - | - | - | - | - |
| Cedar Falls Utilities | - | - | - | - | - |
| City of Aplington | - | - | - | - | - |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about n/a of Iowa's customers in 2025; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 4,791 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. Butler County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Butler County, IA annual power outage report, 2025, 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/2025/iowa/butler-county