DuPage County Power Outage History
2014–2025 · Illinois
Top 20% most reliable nationally — infrequent, short outages. How grades are calculated
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 |
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).
Sized for DuPage County's outage profile
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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 |
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.