Adams CountyPower Outage History
What this grade means
Better than average — fewer or shorter outages than most counties. This county's outage history is better than the national median: recorded outages are less frequent and/or shorter in duration than a typical US county experienced over the same 12-year period. It isn't in the top tier nationally, but its track record points to lower-than-average outage risk.
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 |
Was There an Outage on a Specific Date?
Pick a date to see whether a power outage was recorded for Adams County, Illinois that day.
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).
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 |
Most reliable counties nationally
The top 3 counties nationally by reliability grade and percentile.
| County | State | Grade | National percentile |
|---|---|---|---|
| Clay County | South Dakota | A | 100th |
| Clearwater County | Minnesota | A | 99th |
| Limestone County | Alabama | A | 99th |
Least reliable counties nationally
The bottom 3 counties nationally by reliability grade and percentile.
| County | State | Grade | National percentile |
|---|---|---|---|
| Clay County | West Virginia | F | 0th |
| Lincoln County | West Virginia | F | 0th |
| Cameron Parish | Louisiana | F | 0th |
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.