Union 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 |
|---|---|---|---|
| Oct 10, 2020 | 6 hrs | 4,813 (35%) | Frost/Freeze |
| May 25, 2015 | 1 hrs | 4,789 (35%) | Unnamed event |
| Mar 13, 2025 | 1 hrs | 4,735 (35%) | Unnamed event |
| Apr 2, 2025 | 2 hrs | 4,731 (35%) | Unnamed event |
| Feb 25, 2018 | 2 hrs | 4,715 (34%) | Dense Fog |
Over the 12 years from 2014 to 2025, Union County recorded 169 distinct power outage events, averaging 3.2 hours per event.
The single worst outage on record in Union County started October 10, 2020 (Frost/Freeze), lasting 6 hours and leaving up to 4,813 customers without power (35% of the county) at its peak.
June has historically been the worst month for outages in Union County, with 28 events recorded during that month across the dataset.
Based on this history, Union County earns a Reliability Grade of B, placing it in the 76th percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Union County's outage profile
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Outage-prep kit
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Similar counties in Illinois
Counties with the closest reliability grade and national percentile to Union County.
| County | Grade | National percentile |
|---|---|---|
| McDonough County | B | 76th |
| Macoupin County | B | 75th |
| Mason County | B | 75th |
| Pulaski County | B | 75th |
| Moultrie County | B | 77th |
FAQ
How often does power go out in Union County?
Between 2014 and 2025, Union County recorded 169 outage events, averaging 3.2 hours each.
What is Union County's reliability grade?
Union County has a Reliability Grade of B, in the 76th national percentile.
What was the worst power outage in Union County?
The worst outage on record started October 10, 2020 (Frost/Freeze), lasting 6 hours and affecting up to 4,813 customers.