County annual report · FIPS 19189
2025 Winnebago County, IA Power Outage Report
In 2025, customers in Winnebago County, IA went without power for an average of 2.4 hours, a total of 17K customer-hours (Iowa average 2.9 hours). That ranks 63rd worst of 99 Iowa counties and 2267th 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 Winnebago 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 | March 28, 2025 10:00 | March 29, 2025 00:15 | 14h 15m | 653 | 2,786 |
| 2 | March 19, 2025 14:30 | March 19, 2025 16:30 | 2h | 624 | 773 |
| 3 | March 5, 2025 03:00 | March 6, 2025 14:30 | 1d 11h | 463 | 3,959 |
| 4 | August 6, 2025 01:15 | August 6, 2025 15:00 | 13h 45m | 362 | 371 |
| 5 | October 13, 2025 17:00 | October 14, 2025 12:45 | 19h 45m | 362 | 816 |
| 6 | January 20, 2025 07:30 | January 20, 2025 09:45 | 2h 15m | 281 | 631 |
| 7 | January 29, 2025 23:30 | January 30, 2025 04:00 | 4h 30m | 232 | 385 |
| 8 | March 25, 2025 16:00 | March 26, 2025 05:00 | 13h | 153 | 1,907 |
| 9 | March 29, 2025 16:45 | March 29, 2025 18:30 | 1h 45m | 153 | 267 |
| 10 | May 14, 2025 11:45 | May 14, 2025 12:00 | 15m | 150 | 38 |
Outage episodes by size in 2025: 10 reached 100+ customers, 0 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 Winnebago 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 |
|---|---|---|---|---|---|
| Heartland Power Coop | 2024 | 65 min | 0.73 | 61 min | 0.71 |
| Interstate Power and Light Co | - | - | - | - | - |
| Prairie Energy Coop | - | - | - | - | - |
| City of Forest City- (IA) | - | - | - | - | - |
| City of Lake Mills | - | - | - | - | - |
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 ÷ 7,213 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. Winnebago County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Winnebago 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/winnebago-county