County annual report · FIPS 17201
2015 Winnebago County, IL Power Outage Report
In 2015, customers in Winnebago County, IL went without power for an average of 1.3 hours, a total of 163K customer-hours (Illinois average 2.3 hours). That ranks 65th worst of 100 Illinois counties and 1568th of 2,484 nationally.
Compared with IL, the US
Coverage line is EAGLE-I's share of Illinois customers tracked each year.
Biggest outages in Winnebago County, 2015
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 13, 2015 10:30 | July 14, 2015 20:00 | 1d 9h | 3,672 | 22K |
| 2 | March 3, 2015 17:00 | March 5, 2015 04:30 | 1d 11h | 3,109 | 11K |
| 3 | May 3, 2015 15:00 | May 3, 2015 16:30 | 1h 30m | 2,901 | 1,456 |
| 4 | March 13, 2015 02:00 | March 13, 2015 02:15 | 15m | 2,651 | 663 |
| 5 | February 1, 2015 17:00 | February 1, 2015 20:00 | 3h | 2,526 | 1,329 |
| 6 | December 28, 2015 18:00 | December 30, 2015 02:00 | 1d 8h | 2,241 | 6,673 |
| 7 | September 17, 2015 13:00 | September 18, 2015 23:30 | 1d 10h | 1,340 | 6,849 |
| 8 | March 16, 2015 13:30 | March 17, 2015 06:30 | 17h | 1,324 | 1,534 |
| 9 | April 20, 2015 10:30 | April 21, 2015 00:30 | 14h | 1,252 | 1,599 |
| 10 | August 22, 2015 08:00 | August 22, 2015 12:30 | 4h 30m | 1,187 | 2,203 |
Outage episodes by size in 2015: 107 reached 100+ customers, 13 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 2015, 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 | 2015 | 1.8 hrs | 0.97 | 72 min | 0.86 |
| Rock Energy Cooperative | - | - | - | - | - |
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 2015; 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, 2015, 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/2015/illinois/winnebago-county