County annual report · FIPS 17177
2023 Stephenson County, IL Power Outage Report
In 2023, customers in Stephenson County, IL went without power for an average of 19.7 hours, a total of 241K customer-hours (Illinois average 4.0 hours). That ranks 16th worst of 102 Illinois counties and 410th of 2,977 nationally.
Compared with IL, the US and 2022
Coverage line is EAGLE-I's share of Illinois customers tracked each year.
Biggest outages in Stephenson County, 2023
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | February 22, 2023 20:30 | February 26, 2023 09:15 | 3d 12h | 6,972 | 134K |
| 2 | July 29, 2023 02:00 | July 31, 2023 10:30 | 2d 8h | 4,300 | 70K |
| 3 | June 25, 2023 03:45 | June 26, 2023 08:45 | 1d 5h | 1,389 | 9,273 |
| 4 | April 1, 2023 00:30 | April 2, 2023 01:45 | 1d 1h | 1,161 | 7,207 |
| 5 | March 5, 2023 14:15 | March 5, 2023 21:00 | 6h 45m | 1,098 | 1,190 |
| 6 | July 26, 2023 13:00 | July 26, 2023 20:45 | 7h 45m | 748 | 887 |
| 7 | July 5, 2023 20:00 | July 6, 2023 04:30 | 8h 30m | 661 | 3,526 |
| 8 | February 9, 2023 16:00 | February 10, 2023 03:45 | 11h 45m | 603 | 1,041 |
| 9 | July 12, 2023 15:45 | July 13, 2023 00:15 | 8h 30m | 568 | 390 |
| 10 | April 3, 2023 00:30 | April 3, 2023 00:45 | 15m | 563 | 141 |
Outage episodes by size in 2023: 34 reached 100+ customers, 5 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 2023, 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 | 2023 | 1.6 hrs | 0.61 | 35 min | 0.48 |
| Rock Energy Cooperative | 2023 | 40 min | 0.38 | 22 min | 0.22 |
| 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 2023; 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, 2023, 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/2023/illinois/stephenson-county