County annual report · FIPS 17099
2020 LaSalle County, IL Power Outage Report
In 2020, customers in LaSalle County, IL went without power for an average of 21.7 hours, a total of 1.4M customer-hours (Illinois average 5.9 hours). That ranks 4th worst of 102 Illinois counties and 395th 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 LaSalle 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 19:45 | August 17, 2020 05:30 | 6d 9h | 30,069 | 1.2M |
| 2 | January 11, 2020 02:30 | January 12, 2020 01:30 | 23h | 4,115 | 12K |
| 3 | July 19, 2020 13:00 | July 20, 2020 01:30 | 12h 30m | 2,071 | 5,396 |
| 4 | June 27, 2020 00:30 | June 28, 2020 01:30 | 1d 1h | 1,887 | 12K |
| 5 | March 17, 2020 09:30 | March 17, 2020 18:45 | 9h 15m | 1,769 | 534 |
| 6 | July 12, 2020 02:00 | July 13, 2020 02:15 | 1d | 1,521 | 14K |
| 7 | June 9, 2020 12:15 | June 10, 2020 18:30 | 1d 6h | 1,449 | 6,116 |
| 8 | September 8, 2020 01:30 | September 9, 2020 14:30 | 1d 13h | 1,132 | 4,346 |
| 9 | January 27, 2020 15:15 | January 27, 2020 17:30 | 2h 15m | 1,053 | 275 |
| 10 | November 10, 2020 21:15 | November 11, 2020 22:15 | 1d 1h | 1,029 | 5,862 |
Outage episodes by size in 2020: 79 reached 100+ customers, 10 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 LaSalle 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 |
|---|---|---|---|---|---|
| Ameren Illinois Company | 2020 | 3.7 hrs | 1.04 | 1.7 hrs | 0.82 |
| Commonwealth Edison Co | 2020 | 5.7 hrs | 0.83 | 40 min | 0.55 |
| Corn Belt Energy Corporation | 2020 | 5.2 hrs | 4.46 | 2.8 hrs | 3.97 |
| 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 94% of Illinois's customers in 2020; 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, 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/lasalle-county