Rock Island CountyPower Outage History
What this grade means
Average — typical outage frequency and duration nationally. This county sits in the middle of the national distribution — its outage frequency and duration over the past 12 years are close to the nationwide median, neither notably better nor worse than most other US counties. A typical amount of backup-power preparedness is reasonable here.
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Aug 10, 2020 | 148 hrs | 56,765 (68%) | Thunderstorm Wind |
| Jul 12, 2020 | 29 hrs | 29,421 (35%) | Thunderstorm Wind |
| Apr 4, 2023 | 51 hrs | 18,519 (22%) | Hail |
| Jun 4, 2025 | 28 hrs | 18,306 (22%) | Tornado |
| Jul 16, 2024 | 44 hrs | 15,855 (19%) | Flood |
Was There an Outage on a Specific Date?
Pick a date to see whether a power outage was recorded for Rock Island County, Illinois that day.
Over the 11 years from 2015 to 2025, Rock Island County recorded 696 distinct power outage events, averaging 2.3 hours per event.
The single worst outage on record in Rock Island County started August 10, 2020 (Thunderstorm Wind), lasting 148 hours and leaving up to 56,765 customers without power (68% of the county) at its peak.
June has historically been the worst month for outages in Rock Island County, with 107 events recorded during that month across the dataset.
Based on this history, Rock Island County earns a Reliability Grade of C, placing it in the 41st percentile nationally for grid reliability (higher percentile = more reliable).
Similar counties in Illinois
Counties with the closest reliability grade and national percentile to Rock Island County.
| County | Grade | National percentile |
|---|---|---|
| Clark County | C | 42nd |
| Monroe County | D | 38th |
| Perry County | C | 44th |
| Carroll County | C | 45th |
| Pope County | C | 45th |
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 Rock Island County?
Between 2015 and 2025, Rock Island County recorded 696 outage events, averaging 2.3 hours each.
What is Rock Island County's reliability grade?
Rock Island County has a Reliability Grade of C, in the 41st national percentile.
What was the worst power outage in Rock Island County?
The worst outage on record started August 10, 2020 (Thunderstorm Wind), lasting 148 hours and affecting up to 56,765 customers.