County annual report · FIPS 17017
2024 Cass County, IL Power Outage Report
In 2024, customers in Cass County, IL went without power for an average of 1.4 hours, a total of 8,716 customer-hours (Illinois average 3.0 hours). That ranks 89th worst of 102 Illinois counties and 2585th 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 Cass 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 | November 1, 2024 14:45 | November 1, 2024 15:15 | 30m | 1,919 | 759 |
| 2 | November 2, 2024 04:15 | November 2, 2024 21:45 | 17h 30m | 539 | 4,971 |
| 3 | November 5, 2024 08:45 | November 5, 2024 22:15 | 13h 30m | 425 | 1,352 |
| 4 | May 17, 2024 17:45 | May 17, 2024 19:00 | 1h 15m | 404 | 204 |
| 5 | October 29, 2024 16:00 | October 29, 2024 22:30 | 6h 30m | 263 | 413 |
| 6 | April 10, 2024 23:45 | April 11, 2024 03:30 | 3h 45m | 33 | 118 |
| 7 | November 1, 2024 18:15 | November 1, 2024 18:45 | 30m | 27 | 14 |
| 8 | February 12, 2024 06:30 | February 12, 2024 12:45 | 6h 15m | 23 | 72 |
| 9 | January 25, 2024 15:00 | January 25, 2024 16:45 | 1h 45m | 17 | 20 |
| 10 | June 23, 2024 16:30 | June 23, 2024 22:45 | 6h 15m | 16 | 61 |
Outage episodes by size in 2024: 5 reached 100+ customers, 1 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 Cass 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 |
|---|---|---|---|---|---|
| Ameren Illinois Company | 2024 | 3.7 hrs | 1.13 | 2.0 hrs | 0.91 |
| Menard Electric Coop | 2024 | 2.8 hrs | 1.49 | 1.9 hrs | 1.27 |
| Ameren | - | - | - | - | - |
| Illinois Rural Electric 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 ÷ 6,087 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. Cass County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Cass 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/cass-county