County annual report · FIPS 17099
2017 LaSalle County, IL Power Outage Report
In 2017, customers in LaSalle County, IL went without power for an average of 4.3 hours, a total of 274K customer-hours (Illinois average 1.4 hours). That ranks 8th worst of 102 Illinois counties and 1056th 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 LaSalle 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 | February 28, 2017 22:30 | March 5, 2017 00:45 | 4d 2h | 9,860 | 139K |
| 2 | June 14, 2017 22:00 | June 16, 2017 20:30 | 1d 22h | 7,332 | 48K |
| 3 | March 6, 2017 16:30 | March 9, 2017 14:00 | 2d 21h | 3,336 | 23K |
| 4 | June 20, 2017 21:30 | June 21, 2017 02:00 | 4h 30m | 2,043 | 1,036 |
| 5 | May 9, 2017 09:45 | May 9, 2017 20:30 | 10h 45m | 2,008 | 4,284 |
| 6 | May 17, 2017 23:00 | May 19, 2017 13:00 | 1d 14h | 1,471 | 16K |
| 7 | May 2, 2017 19:30 | May 3, 2017 00:00 | 4h 30m | 1,060 | 1,071 |
| 8 | April 30, 2017 00:00 | May 1, 2017 01:00 | 1d 1h | 934 | 4,940 |
| 9 | April 5, 2017 21:30 | April 6, 2017 08:15 | 10h 45m | 808 | 7,070 |
| 10 | November 24, 2017 20:00 | November 25, 2017 04:30 | 8h 30m | 700 | 947 |
Outage episodes by size in 2017: 49 reached 100+ customers, 7 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 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 |
|---|---|---|---|---|---|
| Ameren Illinois Company | 2017 | 3.2 hrs | 1.12 | 2.0 hrs | 0.90 |
| Commonwealth Edison Co | 2017 | 1.6 hrs | 0.82 | 55 min | 0.66 |
| Corn Belt Energy Corporation | 2017 | 3.8 hrs | 4.15 | 3.8 hrs | 4.15 |
| 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 2017; 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, 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/lasalle-county