County annual report · FIPS 17031
2022 Cook County, IL Power Outage Report
In 2022, customers in Cook County, IL went without power for an average of 1.4 hours, a total of 3.1M customer-hours (Illinois average 1.6 hours). That ranks 79th worst of 102 Illinois counties and 2533rd of 2,976 nationally.
Compared with IL, the US and 2021
Coverage line is EAGLE-I's share of Illinois customers tracked each year.
Biggest outages in Cook County, 2022
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | June 13, 2022 10:00 | August 11, 2022 10:00 | 59d | 67,114 | 1.7M |
| 2 | August 27, 2022 09:30 | September 6, 2022 08:00 | 9d 22h | 25,999 | 148K |
| 3 | November 2, 2022 11:00 | November 10, 2022 10:30 | 7d 23h | 22,803 | 225K |
| 4 | August 11, 2022 11:30 | August 21, 2022 11:45 | 10d | 22,093 | 61K |
| 5 | March 4, 2022 13:15 | March 9, 2022 05:30 | 4d 16h | 7,650 | 71K |
| 6 | April 11, 2022 08:45 | April 17, 2022 08:00 | 5d 23h | 4,874 | 45K |
| 7 | October 23, 2022 11:30 | October 31, 2022 03:45 | 7d 16h | 4,076 | 45K |
| 8 | January 1, 2022 00:00 | January 7, 2022 05:15 | 6d 5h | 3,324 | 21K |
| 9 | December 22, 2022 12:15 | December 25, 2022 10:30 | 2d 22h | 3,206 | 26K |
| 10 | December 12, 2022 13:45 | December 16, 2022 10:00 | 3d 20h | 3,013 | 20K |
Outage episodes by size in 2022: 100 reached 100+ customers, 52 reached 1,000+ customers, 4 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 Cook County reported on EIA Form 861 for 2022, 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 | 2022 | 66 min | 0.63 | 38 min | 0.52 |
| Northern Indiana Pub Serv Co | 2022 | 6.2 hrs | 1.44 | 2.4 hrs | 0.95 |
| University of Illinois | - | - | - | - | - |
| Village of Winnetka - (IL) | - | - | - | - | - |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about 98% of Illinois's customers in 2022; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 2,162,007 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. Cook County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Cook County, IL annual power outage report, 2022, 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/2022/illinois/cook-county