Carroll County Power Outage History
2014–2025 · Illinois
Average — typical outage frequency and duration nationally. How grades are calculated
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Aug 10, 2020 | 69 hrs | 4,732 (65%) | Thunderstorm Wind |
| Jul 29, 2023 | 3 hrs | 3,336 (45%) | Unnamed event |
| Jun 17, 2020 | 1 hrs | 3,138 (43%) | Unnamed event |
| Jul 22, 2017 | 3 hrs | 2,980 (41%) | Thunderstorm Wind |
| Jul 16, 2024 | 48 hrs | 2,728 (37%) | Flood |
Over the 12 years from 2014 to 2025, Carroll County recorded 301 distinct power outage events, averaging 3.8 hours per event.
The single worst outage on record in Carroll County started August 10, 2020 (Thunderstorm Wind), lasting 69 hours and leaving up to 4,732 customers without power (65% of the county) at its peak.
June has historically been the worst month for outages in Carroll County, with 69 events recorded during that month across the dataset.
Based on this history, Carroll County earns a Reliability Grade of C, placing it in the 45th percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Carroll County's outage profile
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Similar counties in Illinois
Counties with the closest reliability grade and national percentile to Carroll County.
| County | Grade | National percentile |
|---|---|---|
| Perry County | C | 44th |
| Pope County | C | 45th |
| Fayette County | C | 46th |
| Vermilion County | C | 46th |
| Lee County | C | 46th |
FAQ
How often does power go out in Carroll County?
Between 2014 and 2025, Carroll County recorded 301 outage events, averaging 3.8 hours each.
What is Carroll County's reliability grade?
Carroll County has a Reliability Grade of C, in the 45th national percentile.
What was the worst power outage in Carroll County?
The worst outage on record started August 10, 2020 (Thunderstorm Wind), lasting 69 hours and affecting up to 4,732 customers.