DuPage CountyPower Outage History
What this grade means
Top 20% most reliable nationally — infrequent, short outages. This county ranks in the most reliable fifth of all US counties in our dataset, based on 12 years of real DOE outage records: outages happen less often here, and when they do occur they tend to be resolved quickly compared to the rest of the country. Baseline outage risk is low, though a severe local storm can still occasionally cause a longer-than-usual outage regardless of the long-term track record.
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Aug 10, 2020 | 12 hrs | 64,595 (16%) | Thunderstorm Wind |
| Aug 11, 2020 | 11 hrs | 49,827 (12%) | Thunderstorm Wind |
| Aug 11, 2020 | 43 hrs | 35,118 (9%) | Thunderstorm Wind |
| Nov 26, 2018 | 14 hrs | 27,278 (7%) | Winter Storm |
| Mar 9, 2015 | 3 hrs | 26,874 (7%) | Unnamed event |
Was There an Outage on a Specific Date?
Pick a date to see whether a power outage was recorded for DuPage County, Illinois that day.
Over the 12 years from 2014 to 2025, DuPage County recorded 2,725 distinct power outage events, averaging 1.8 hours per event.
The single worst outage on record in DuPage County started August 10, 2020 (Thunderstorm Wind), lasting 12 hours and leaving up to 64,595 customers without power (16% of the county) at its peak.
June has historically been the worst month for outages in DuPage County, with 360 events recorded during that month across the dataset.
Based on this history, DuPage County earns a Reliability Grade of A, placing it in the 80th percentile nationally for grid reliability (higher percentile = more reliable).
Similar counties in Illinois
Counties with the closest reliability grade and national percentile to DuPage County.
| County | Grade | National percentile |
|---|---|---|
| Montgomery County | A | 80th |
| McLean County | A | 81st |
| Greene County | A | 81st |
| Kane County | B | 79th |
| Cook County | B | 79th |
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 DuPage County?
Between 2014 and 2025, DuPage County recorded 2,725 outage events, averaging 1.8 hours each.
What is DuPage County's reliability grade?
DuPage County has a Reliability Grade of A, in the 80th national percentile.
What was the worst power outage in DuPage County?
The worst outage on record started August 10, 2020 (Thunderstorm Wind), lasting 12 hours and affecting up to 64,595 customers.