County annual report · FIPS 17097
2018 Lake County, IL Power Outage Report
In 2018, customers in Lake County, IL went without power for an average of 1.5 hours, a total of 887K customer-hours (Illinois average 2.5 hours). That ranks 72nd worst of 102 Illinois counties and 2080th 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 Lake 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 | November 25, 2018 18:00 | November 30, 2018 10:00 | 4d 16h | 20,513 | 471K |
| 2 | June 30, 2018 16:00 | July 4, 2018 15:00 | 3d 23h | 8,993 | 32K |
| 3 | May 6, 2018 14:00 | May 6, 2018 23:00 | 9h | 7,093 | 23K |
| 4 | April 14, 2018 05:00 | April 16, 2018 08:00 | 2d 3h | 6,555 | 28K |
| 5 | August 26, 2018 10:30 | August 30, 2018 07:30 | 3d 21h | 4,908 | 65K |
| 6 | October 20, 2018 13:00 | October 22, 2018 01:30 | 1d 12h | 2,846 | 16K |
| 7 | September 25, 2018 07:30 | September 27, 2018 02:00 | 1d 18h | 2,657 | 13K |
| 8 | September 1, 2018 13:00 | September 4, 2018 08:00 | 2d 19h | 2,516 | 19K |
| 9 | November 3, 2018 23:00 | November 4, 2018 06:30 | 7h 30m | 2,356 | 1,734 |
| 10 | May 11, 2018 12:30 | May 11, 2018 23:30 | 11h | 2,257 | 1,718 |
Outage episodes by size in 2018: 223 reached 100+ customers, 37 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 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 |
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 ÷ 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, 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/lake-county