County annual report · FIPS 17097
2020 Lake County, IL Power Outage Report
In 2020, customers in Lake County, IL went without power for an average of 1.2 hours, a total of 687K customer-hours (Illinois average 5.9 hours). That ranks 89th worst of 102 Illinois counties and 2595th of 3,019 nationally.
Compared with IL, the US and 2019
Coverage line is EAGLE-I's share of Illinois customers tracked each year.
Biggest outages in Lake County, 2020
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 10, 2020 10:15 | August 14, 2020 05:30 | 3d 19h | 28,909 | 427K |
| 2 | July 9, 2020 13:00 | July 11, 2020 07:45 | 1d 18h | 10,191 | 53K |
| 3 | June 9, 2020 22:45 | June 11, 2020 00:45 | 1d 2h | 2,714 | 21K |
| 4 | November 10, 2020 13:15 | November 12, 2020 03:45 | 1d 14h | 2,234 | 12K |
| 5 | June 26, 2020 22:00 | June 27, 2020 21:00 | 23h | 2,019 | 5,101 |
| 6 | July 27, 2020 11:30 | July 28, 2020 03:00 | 15h 30m | 1,965 | 2,942 |
| 7 | January 12, 2020 15:45 | January 12, 2020 21:00 | 5h 15m | 1,907 | 1,383 |
| 8 | April 23, 2020 17:45 | April 23, 2020 22:30 | 4h 45m | 1,792 | 941 |
| 9 | February 16, 2020 05:00 | February 16, 2020 07:15 | 2h 15m | 1,723 | 1,380 |
| 10 | November 15, 2020 13:30 | November 16, 2020 04:45 | 15h 15m | 1,629 | 4,365 |
Outage episodes by size in 2020: 211 reached 100+ customers, 29 reached 1,000+ customers, 2 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 2020, 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 | 2020 | 5.7 hrs | 0.83 | 40 min | 0.55 |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about 94% of Illinois's customers in 2020; 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, 2020, 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/2020/illinois/lake-county