County annual report · FIPS 17177
2020 Stephenson County, IL Power Outage Report
In 2020, customers in Stephenson County, IL went without power for an average of 8.1 hours, a total of 99K customer-hours (Illinois average 5.9 hours). That ranks 20th worst of 102 Illinois counties and 948th of 3,019 nationally.
Compared with IL, the US and 2019
Coverage line is EAGLE-I's share of Illinois customers tracked each year.
Biggest outages in Stephenson County, 2020
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | January 11, 2020 02:15 | January 13, 2020 16:15 | 2d 14h | 2,781 | 47K |
| 2 | August 10, 2020 19:15 | August 13, 2020 23:30 | 3d 4h | 2,595 | 32K |
| 3 | July 27, 2020 00:15 | July 27, 2020 09:00 | 8h 45m | 1,052 | 4,998 |
| 4 | August 17, 2020 13:30 | August 17, 2020 14:45 | 1h 15m | 967 | 1,014 |
| 5 | April 29, 2020 15:00 | April 29, 2020 16:45 | 1h 45m | 788 | 199 |
| 6 | May 27, 2020 00:15 | May 27, 2020 18:15 | 18h | 709 | 1,198 |
| 7 | June 2, 2020 06:15 | June 2, 2020 09:45 | 3h 30m | 567 | 813 |
| 8 | June 10, 2020 02:45 | June 10, 2020 07:30 | 4h 45m | 528 | 1,192 |
| 9 | November 6, 2020 16:45 | November 6, 2020 22:30 | 5h 45m | 486 | 776 |
| 10 | November 10, 2020 19:00 | November 11, 2020 00:30 | 5h 30m | 286 | 111 |
Outage episodes by size in 2020: 17 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 2020, 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 | 2020 | 5.7 hrs | 0.83 | 40 min | 0.55 |
| Rock Energy Cooperative | 2020 | 1.7 hrs | 0.68 | - | - |
| 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 94% of Illinois's customers in 2020; 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, 2020, 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/2020/illinois/stephenson-county