County annual report · FIPS 17097
2023 Lake County, IL Power Outage Report
In 2023, customers in Lake County, IL went without power for an average of 0.6 hours, a total of 368K customer-hours (Illinois average 4.0 hours). That ranks 100th worst of 102 Illinois counties and 2787th of 2,977 nationally.
Compared with IL, the US and 2022
Coverage line is EAGLE-I's share of Illinois customers tracked each year.
Biggest outages in Lake County, 2023
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | February 22, 2023 19:00 | February 25, 2023 21:30 | 3d 2h | 14,719 | 207K |
| 2 | July 26, 2023 13:15 | July 27, 2023 08:00 | 18h 45m | 4,717 | 9,296 |
| 3 | July 31, 2023 11:45 | August 1, 2023 05:30 | 17h 45m | 1,788 | 1,168 |
| 4 | June 29, 2023 13:45 | June 30, 2023 03:30 | 13h 45m | 1,761 | 1,065 |
| 5 | February 9, 2023 13:00 | February 9, 2023 22:00 | 9h | 1,702 | 543 |
| 6 | July 2, 2023 06:45 | July 3, 2023 02:15 | 19h 30m | 1,647 | 1,794 |
| 7 | July 28, 2023 23:15 | July 30, 2023 00:45 | 1d 1h | 1,522 | 7,960 |
| 8 | July 28, 2023 07:45 | July 28, 2023 19:00 | 11h 15m | 1,517 | 3,342 |
| 9 | April 11, 2023 14:00 | April 12, 2023 03:00 | 13h | 1,345 | 1,084 |
| 10 | August 3, 2023 15:00 | August 3, 2023 23:30 | 8h 30m | 1,342 | 1,769 |
Outage episodes by size in 2023: 198 reached 100+ customers, 16 reached 1,000+ customers, 1 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 Lake County reported on EIA Form 861 for 2023, 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 | 2023 | 1.6 hrs | 0.61 | 35 min | 0.48 |
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 2023; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 581,008 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. Lake County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Lake County, IL annual power outage report, 2023, 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/2023/illinois/lake-county