County annual report · FIPS 17201
2025 Winnebago County, IL Power Outage Report
In 2025, customers in Winnebago County, IL went without power for an average of 1.6 hours, a total of 195K customer-hours (Illinois average 2.5 hours). That ranks 84th worst of 102 Illinois counties and 2568th of 3,000 nationally.
Compared with IL, the US and 2024
Coverage line is EAGLE-I's share of Illinois 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 15, 2025 03:45 | March 18, 2025 13:30 | 3d 9h | 8,091 | 51K |
| 2 | June 26, 2025 00:15 | June 27, 2025 06:00 | 1d 5h | 5,646 | 7,944 |
| 3 | July 10, 2025 22:00 | July 12, 2025 19:45 | 1d 21h | 3,059 | 27K |
| 4 | August 8, 2025 20:45 | August 9, 2025 02:30 | 5h 45m | 1,913 | 1,532 |
| 5 | August 16, 2025 18:15 | August 18, 2025 05:00 | 1d 10h | 1,429 | 2,089 |
| 6 | May 15, 2025 21:00 | May 17, 2025 09:45 | 1d 12h | 1,388 | 10K |
| 7 | November 9, 2025 03:15 | November 10, 2025 05:15 | 1d 2h | 1,298 | 11K |
| 8 | June 14, 2025 12:15 | June 14, 2025 21:00 | 8h 45m | 1,065 | 1,768 |
| 9 | July 17, 2025 13:30 | July 18, 2025 02:30 | 13h | 1,043 | 563 |
| 10 | June 3, 2025 11:45 | June 5, 2025 01:45 | 1d 14h | 1,026 | 7,885 |
Outage episodes by size in 2025: 108 reached 100+ customers, 11 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 |
|---|---|---|---|---|---|
| Commonwealth Edison Co | 2024 | 2.2 hrs | 0.68 | 36 min | 0.49 |
| Rock Energy Cooperative | 2024 | 53 min | 0.48 | 27 min | 0.36 |
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 Illinois's customers in 2025; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 120,789 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, IL 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/illinois/winnebago-county