County annual report · FIPS 17201
2018 Winnebago County, IL Power Outage Report
In 2018, customers in Winnebago County, IL went without power for an average of 2.1 hours, a total of 255K customer-hours (Illinois average 2.5 hours). That ranks 59th worst of 102 Illinois counties and 1823rd of 2,798 nationally.
Compared with IL, the US and 2017
Coverage line is EAGLE-I's share of Illinois customers tracked each year.
Biggest outages in Winnebago 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 | August 28, 2018 19:00 | August 30, 2018 09:30 | 1d 14h | 4,370 | 39K |
| 2 | October 8, 2018 15:00 | October 8, 2018 20:00 | 5h | 4,303 | 4,426 |
| 3 | September 2, 2018 03:30 | September 4, 2018 03:00 | 1d 23h | 3,805 | 17K |
| 4 | April 14, 2018 05:30 | April 15, 2018 18:30 | 1d 13h | 2,667 | 14K |
| 5 | October 20, 2018 12:00 | October 21, 2018 23:00 | 1d 11h | 2,571 | 19K |
| 6 | August 9, 2018 17:00 | August 9, 2018 20:30 | 3h 30m | 2,197 | 2,966 |
| 7 | June 18, 2018 21:00 | June 20, 2018 00:30 | 1d 3h | 2,130 | 11K |
| 8 | August 5, 2018 15:30 | August 7, 2018 05:00 | 1d 13h | 1,773 | 11K |
| 9 | May 24, 2018 13:00 | May 24, 2018 23:15 | 10h 15m | 1,727 | 1,802 |
| 10 | August 16, 2018 16:30 | August 18, 2018 04:00 | 1d 11h | 1,527 | 2,999 |
Outage episodes by size in 2018: 131 reached 100+ customers, 22 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 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 |
|---|---|---|---|---|---|
| Commonwealth Edison Co | 2018 | 2.0 hrs | 0.82 | 58 min | 0.70 |
| 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 92% of Illinois's customers in 2018; 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, 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/illinois/winnebago-county