Iroquois County Power Outage History
2014–2025 · Illinois
Better than average — fewer or shorter outages than most counties. How grades are calculated
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| May 23, 2019 | 35 hrs | 5,566 (42%) | Thunderstorm Wind |
| Apr 1, 2016 | 2 hrs | 4,158 (31%) | Unnamed event |
| Feb 21, 2024 | 1 hrs | 3,803 (29%) | Unnamed event |
| Aug 10, 2020 | 34 hrs | 3,751 (28%) | Thunderstorm Wind |
| Jan 23, 2020 | 1 hrs | 3,540 (27%) | Unnamed event |
Over the 12 years from 2014 to 2025, Iroquois County recorded 410 distinct power outage events, averaging 2.4 hours per event.
The single worst outage on record in Iroquois County started May 23, 2019 (Thunderstorm Wind), lasting 35 hours and leaving up to 5,566 customers without power (42% of the county) at its peak.
July has historically been the worst month for outages in Iroquois County, with 51 events recorded during that month across the dataset.
Based on this history, Iroquois County earns a Reliability Grade of B, placing it in the 71st percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Iroquois County's outage profile
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Similar counties in Illinois
Counties with the closest reliability grade and national percentile to Iroquois County.
| County | Grade | National percentile |
|---|---|---|
| Fulton County | B | 71st |
| Ogle County | B | 70th |
| Williamson County | B | 72nd |
| Boone County | B | 73rd |
| Ford County | B | 73rd |
FAQ
How often does power go out in Iroquois County?
Between 2014 and 2025, Iroquois County recorded 410 outage events, averaging 2.4 hours each.
What is Iroquois County's reliability grade?
Iroquois County has a Reliability Grade of B, in the 71st national percentile.
What was the worst power outage in Iroquois County?
The worst outage on record started May 23, 2019 (Thunderstorm Wind), lasting 35 hours and affecting up to 5,566 customers.