County annual report · FIPS 17085
2021 Jo Daviess County, IL Power Outage Report
In 2021, customers in Jo Daviess County, IL went without power for an average of 5.4 hours, a total of 19K customer-hours (Illinois average 2.3 hours). That ranks 19th worst of 102 Illinois counties and 1264th of 2,974 nationally.
Compared with IL, the US and 2020
Coverage line is EAGLE-I's share of Illinois customers tracked each year.
Biggest outages in Jo Daviess County, 2021
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | December 16, 2021 03:30 | December 17, 2021 09:15 | 1d 5h | 1,300 | 3,837 |
| 2 | October 25, 2021 18:30 | October 25, 2021 19:00 | 30m | 1,145 | 573 |
| 3 | October 24, 2021 23:15 | October 25, 2021 02:00 | 2h 45m | 477 | 671 |
| 4 | August 24, 2021 22:00 | August 25, 2021 17:15 | 19h 15m | 378 | 533 |
| 5 | August 19, 2021 15:00 | August 19, 2021 18:00 | 3h | 364 | 95 |
| 6 | March 11, 2021 04:45 | March 11, 2021 05:15 | 30m | 362 | 181 |
| 7 | November 21, 2021 21:00 | November 22, 2021 00:45 | 3h 45m | 330 | 203 |
| 8 | July 28, 2021 07:45 | July 28, 2021 16:15 | 8h 30m | 310 | 887 |
| 9 | February 15, 2021 06:45 | February 15, 2021 11:00 | 4h 15m | 253 | 712 |
| 10 | May 1, 2021 23:45 | May 2, 2021 02:45 | 3h | 242 | 545 |
Outage episodes by size in 2021: 20 reached 100+ customers, 2 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 Jo Daviess County reported on EIA Form 861 for 2021, 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 | 2021 | 1.7 hrs | 0.77 | 43 min | 0.59 |
| Jo-Carroll Energy, Inc | 2021 | 66 min | 0.51 | 37 min | 0.41 |
| 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 98% of Illinois's customers in 2021; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 3,617 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. Jo Daviess County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Jo Daviess County, IL annual power outage report, 2021, 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/2021/illinois/jo-daviess-county