County annual report · FIPS 17095
2021 Knox County, IL Power Outage Report
In 2021, customers in Knox County, IL went without power for an average of 7.2 hours, a total of 187K customer-hours (Illinois average 2.3 hours). That ranks 8th worst of 102 Illinois counties and 1011th 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 Knox 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 | June 19, 2021 03:45 | June 22, 2021 00:00 | 2d 20h | 5,388 | 74K |
| 2 | January 5, 2021 15:45 | January 5, 2021 22:45 | 7h | 2,339 | 7,567 |
| 3 | March 15, 2021 20:45 | March 17, 2021 00:00 | 1d 3h | 2,240 | 2,552 |
| 4 | July 7, 2021 08:15 | July 7, 2021 12:15 | 4h | 1,836 | 3,738 |
| 5 | August 11, 2021 09:15 | August 12, 2021 17:15 | 1d 8h | 1,705 | 13K |
| 6 | June 6, 2021 19:15 | June 7, 2021 01:00 | 5h 45m | 1,661 | 1,740 |
| 7 | December 11, 2021 08:30 | December 11, 2021 22:15 | 13h 45m | 1,417 | 5,855 |
| 8 | August 25, 2021 01:00 | August 25, 2021 17:45 | 16h 45m | 1,414 | 6,422 |
| 9 | December 15, 2021 20:15 | December 17, 2021 02:45 | 1d 6h | 1,173 | 7,102 |
| 10 | June 1, 2021 22:15 | June 1, 2021 23:15 | 1h | 923 | 519 |
Outage episodes by size in 2021: 74 reached 100+ customers, 9 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 Knox 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 |
|---|---|---|---|---|---|
| Ameren Illinois Company | 2021 | 3.2 hrs | 1.11 | 2.0 hrs | 0.88 |
| Corn Belt Energy Corporation | 2021 | 12.3 hrs | 6.64 | 3.7 hrs | 4.71 |
| Ameren | - | - | - | - | - |
| McDonough Power Coop | - | - | - | - | - |
| Spoon River Electric Coop, Inc | - | - | - | - | - |
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 ÷ 25,998 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. Knox County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Knox 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/knox-county