County annual report · FIPS 17097
2017 Lake County, IL Power Outage Report
In 2017, customers in Lake County, IL went without power for an average of 0.9 hours, a total of 549K customer-hours (Illinois average 1.4 hours). That ranks 55th worst of 102 Illinois counties and 2063rd of 2,786 nationally.
Compared with IL, the US and 2016
Coverage line is EAGLE-I's share of Illinois customers tracked each year.
Biggest outages in Lake County, 2017
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | July 12, 2017 05:00 | July 23, 2017 05:30 | 11d | 9,288 | 121K |
| 2 | June 28, 2017 07:30 | June 30, 2017 07:30 | 2d | 7,982 | 44K |
| 3 | March 8, 2017 13:00 | March 10, 2017 05:00 | 1d 16h | 7,660 | 39K |
| 4 | June 14, 2017 17:00 | June 16, 2017 05:00 | 1d 12h | 7,544 | 50K |
| 5 | July 10, 2017 03:30 | July 11, 2017 06:00 | 1d 2h | 5,251 | 16K |
| 6 | May 17, 2017 18:45 | May 19, 2017 08:00 | 1d 13h | 4,018 | 21K |
| 7 | August 2, 2017 13:30 | August 4, 2017 10:30 | 1d 21h | 2,770 | 8,999 |
| 8 | July 29, 2017 13:30 | July 29, 2017 21:00 | 7h 30m | 2,485 | 2,791 |
| 9 | May 23, 2017 03:00 | May 23, 2017 07:00 | 4h | 2,457 | 2,744 |
| 10 | August 17, 2017 10:30 | August 18, 2017 07:00 | 20h 30m | 2,447 | 4,563 |
Outage episodes by size in 2017: 190 reached 100+ customers, 33 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 Lake County reported on EIA Form 861 for 2017, 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 | 2017 | 1.6 hrs | 0.82 | 55 min | 0.66 |
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 2017; 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, 2017, 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/2017/illinois/lake-county