County annual report · FIPS 17043
2025 DuPage County, IL Power Outage Report
In 2025, customers in DuPage County, IL went without power for an average of 2.1 hours, a total of 670K customer-hours (Illinois average 2.5 hours). That ranks 73rd worst of 102 Illinois counties and 2369th of 3,000 nationally.
Compared with IL, the US and 2024
Coverage line is EAGLE-I's share of Illinois customers tracked each year.
Biggest outages in DuPage County, 2025
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | August 8, 2025 16:00 | August 9, 2025 06:30 | 14h 30m | 20,530 | 126K |
| 2 | August 16, 2025 21:15 | August 20, 2025 09:00 | 3d 11h | 14,386 | 146K |
| 3 | July 24, 2025 10:45 | July 27, 2025 01:30 | 2d 14h | 12,042 | 130K |
| 4 | July 16, 2025 17:30 | July 18, 2025 02:30 | 1d 9h | 7,780 | 28K |
| 5 | May 15, 2025 10:00 | May 18, 2025 06:00 | 2d 20h | 3,701 | 20K |
| 6 | July 15, 2025 11:00 | July 16, 2025 06:00 | 19h | 2,098 | 2,515 |
| 7 | June 17, 2025 12:30 | June 20, 2025 06:45 | 2d 18h | 1,822 | 24K |
| 8 | January 30, 2025 22:45 | February 1, 2025 04:45 | 1d 6h | 1,748 | 5,867 |
| 9 | November 18, 2025 07:45 | November 19, 2025 02:45 | 19h | 1,492 | 1,845 |
| 10 | March 23, 2025 22:30 | March 24, 2025 21:00 | 22h 30m | 1,485 | 3,337 |
Outage episodes by size in 2025: 232 reached 100+ customers, 13 reached 1,000+ customers, 3 reached 10,000+ customers.
Utility reliability filed with the EIA
SAIDI (average outage time per customer) and SAIFI (average interruptions per customer) that utilities serving DuPage County reported on EIA Form 861 for 2025, or their most recent earlier filing. Utility-wide figures, not county-specific.
| Utility | EIA year | SAIDI | SAIFI | SAIDI excl. major events | SAIFI excl. major events |
|---|---|---|---|---|---|
| Commonwealth Edison Co | 2024 | 2.2 hrs | 0.68 | 36 min | 0.49 |
| City of Naperville - (IL) | 2024 | 25 min | 0.50 | - | - |
| City of St Charles - (IL) | - | - | - | - | - |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about n/a of Illinois's customers in 2025; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 313,751 customers (ORNL modeled county customer count), including major storm days. It is comparable across counties but is not the SAIDI a utility files.
- An outage event is a continuous stretch with customers out; counts at 100, 1,000 and 10,000+ use its peak.
- Years loaded: 2015–2025. DuPage County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), DuPage County, IL annual power outage report, 2025, data as of Oct 3, 2026 02:41 UTC, sources: DOE EAGLE-I (https://eagle-i.doe.gov/); EAGLE-I modeled customer counts (MCC) (https://figshare.com/); EIA Form 861 (utility reliability) (https://www.eia.gov/electricity/data/eia861/). https://massoutage.com/reports/2025/illinois/dupage-county