County annual report · FIPS 17099
2015 LaSalle County, IL Power Outage Report
In 2015, customers in LaSalle County, IL went without power for an average of 2.3 hours, a total of 144K customer-hours (Illinois average 2.3 hours). That ranks 42nd worst of 100 Illinois counties and 1136th of 2,484 nationally.
Compared with IL, the US
Coverage line is EAGLE-I's share of Illinois customers tracked each year.
Biggest outages in LaSalle County, 2015
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 10, 2015 19:30 | June 11, 2015 02:30 | 7h | 3,247 | 4,189 |
| 2 | December 28, 2015 12:30 | December 31, 2015 00:15 | 2d 11h | 2,650 | 35K |
| 3 | August 18, 2015 18:30 | August 19, 2015 21:00 | 1d 2h | 2,146 | 7,498 |
| 4 | July 15, 2015 17:45 | July 16, 2015 03:00 | 9h 15m | 2,080 | 5,330 |
| 5 | August 3, 2015 15:30 | August 3, 2015 22:00 | 6h 30m | 2,055 | 873 |
| 6 | June 8, 2015 01:00 | June 8, 2015 16:30 | 15h 30m | 2,054 | 2,947 |
| 7 | September 16, 2015 23:00 | September 17, 2015 09:45 | 10h 45m | 1,751 | 4,321 |
| 8 | February 1, 2015 11:30 | February 3, 2015 03:00 | 1d 15h | 1,470 | 6,616 |
| 9 | June 23, 2015 02:00 | June 24, 2015 17:00 | 1d 15h | 1,309 | 8,695 |
| 10 | October 29, 2015 06:30 | October 29, 2015 09:30 | 3h | 1,300 | 3,900 |
Outage episodes by size in 2015: 80 reached 100+ customers, 12 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 LaSalle County reported on EIA Form 861 for 2015, 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 |
|---|---|---|---|---|---|
| Ameren Illinois Company | 2015 | 5.9 hrs | 1.39 | 2.2 hrs | 1.04 |
| Commonwealth Edison Co | 2015 | 1.8 hrs | 0.97 | 72 min | 0.86 |
| Corn Belt Energy Corporation | 2015 | 10.7 hrs | 5.30 | 4.1 hrs | 4.20 |
| Ameren | - | - | - | - | - |
| City of Oglesby - (IL) | - | - | - | - | - |
| City of Peru - (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 n/a of Illinois's customers in 2015; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 63,017 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. LaSalle County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), LaSalle County, IL annual power outage report, 2015, 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/2015/illinois/lasalle-county