County annual report · FIPS 17099
2023 LaSalle County, IL Power Outage Report
In 2023, customers in LaSalle County, IL went without power for an average of 3.0 hours, a total of 192K customer-hours (Illinois average 4.0 hours). That ranks 64th worst of 102 Illinois counties and 1940th 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 LaSalle 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 | July 29, 2023 02:15 | July 31, 2023 16:45 | 2d 14h | 5,471 | 47K |
| 2 | April 1, 2023 00:30 | April 2, 2023 23:30 | 1d 23h | 2,671 | 41K |
| 3 | September 26, 2023 02:45 | September 26, 2023 06:15 | 3h 30m | 2,327 | 6,149 |
| 4 | April 5, 2023 01:00 | April 6, 2023 00:45 | 23h 45m | 2,275 | 12K |
| 5 | August 20, 2023 22:45 | August 21, 2023 06:00 | 7h 15m | 2,081 | 3,844 |
| 6 | May 7, 2023 23:15 | May 9, 2023 08:30 | 1d 9h | 1,767 | 7,376 |
| 7 | December 18, 2023 12:00 | December 18, 2023 20:15 | 8h 15m | 1,648 | 2,156 |
| 8 | June 25, 2023 05:45 | June 26, 2023 17:15 | 1d 11h | 1,503 | 3,049 |
| 9 | February 17, 2023 00:15 | February 17, 2023 17:15 | 17h | 1,060 | 3,267 |
| 10 | December 14, 2023 00:00 | December 14, 2023 04:00 | 4h | 973 | 2,905 |
Outage episodes by size in 2023: 77 reached 100+ customers, 9 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 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 |
|---|---|---|---|---|---|
| Ameren Illinois Company | 2023 | 9.9 hrs | 1.33 | 1.9 hrs | 0.82 |
| Commonwealth Edison Co | 2023 | 1.6 hrs | 0.61 | 35 min | 0.48 |
| Corn Belt Energy Corporation | 2023 | 6.5 hrs | 4.54 | 2.6 hrs | 3.88 |
| 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 2023; 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, 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/lasalle-county