Adams 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 |
|---|---|---|---|
| Jul 13, 2015 | 23 hrs | 21,688 (51%) | Thunderstorm Wind |
| Jul 14, 2015 | 50 hrs | 16,551 (39%) | Thunderstorm Wind |
| May 11, 2020 | 2 hrs | 6,772 (16%) | Unnamed event |
| Jul 13, 2016 | 17 hrs | 6,703 (16%) | Hail |
| Jul 29, 2025 | 8 hrs | 6,159 (14%) | Thunderstorm Wind |
Over the 12 years from 2014 to 2025, Adams County recorded 295 distinct power outage events, averaging 2.5 hours per event.
The single worst outage on record in Adams County started July 13, 2015 (Thunderstorm Wind), lasting 23 hours and leaving up to 21,688 customers without power (51% of the county) at its peak.
June has historically been the worst month for outages in Adams County, with 40 events recorded during that month across the dataset.
Based on this history, Adams County earns a Reliability Grade of B, placing it in the 62nd percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Adams 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 Adams County.
| County | Grade | National percentile |
|---|---|---|
| Franklin County | B | 62nd |
| Scott County | B | 63rd |
| Brown County | B | 63rd |
| Winnebago County | B | 61st |
| Will County | B | 63rd |
FAQ
How often does power go out in Adams County?
Between 2014 and 2025, Adams County recorded 295 outage events, averaging 2.5 hours each.
What is Adams County's reliability grade?
Adams County has a Reliability Grade of B, in the 62nd national percentile.
What was the worst power outage in Adams County?
The worst outage on record started July 13, 2015 (Thunderstorm Wind), lasting 23 hours and affecting up to 21,688 customers.