County annual report · FIPS 17177
2024 Stephenson County, IL Power Outage Report
In 2024, customers in Stephenson County, IL went without power for an average of 14.8 hours, a total of 182K customer-hours (Illinois average 3.0 hours). That ranks 6th worst of 102 Illinois counties and 669th of 2,990 nationally.
Compared with IL, the US and 2023
Coverage line is EAGLE-I's share of Illinois customers tracked each year.
Biggest outages in Stephenson County, 2024
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | July 15, 2024 08:15 | July 19, 2024 17:45 | 4d 9h | 6,053 | 96K |
| 2 | May 21, 2024 20:45 | May 24, 2024 00:15 | 2d 3h | 4,426 | 68K |
| 3 | August 29, 2024 00:15 | August 29, 2024 01:45 | 1h 30m | 1,246 | 998 |
| 4 | January 23, 2024 03:00 | January 23, 2024 06:00 | 3h | 837 | 224 |
| 5 | December 4, 2024 21:15 | December 5, 2024 04:00 | 6h 45m | 718 | 474 |
| 6 | September 29, 2024 14:45 | September 29, 2024 17:30 | 2h 45m | 567 | 1,557 |
| 7 | July 4, 2024 14:00 | July 4, 2024 14:45 | 45m | 566 | 425 |
| 8 | June 7, 2024 18:00 | June 7, 2024 22:30 | 4h 30m | 358 | 312 |
| 9 | June 3, 2024 18:15 | June 4, 2024 09:00 | 14h 45m | 335 | 767 |
| 10 | January 9, 2024 23:45 | January 10, 2024 00:00 | 15m | 320 | 80 |
Outage episodes by size in 2024: 25 reached 100+ customers, 3 reached 1,000+ customers, 0 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 Stephenson County reported on EIA Form 861 for 2024, 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 |
| Rock Energy Cooperative | 2024 | 53 min | 0.48 | 27 min | 0.36 |
| Scenic Rivers Energy Coop | - | - | - | - | - |
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 2024; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 12,248 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. Stephenson County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Stephenson County, IL annual power outage report, 2024, 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/2024/illinois/stephenson-county