County annual report · FIPS 17017
2023 Cass County, IL Power Outage Report
In 2023, customers in Cass County, IL went without power for an average of 2.1 hours, a total of 13K customer-hours (Illinois average 4.0 hours). That ranks 79th worst of 102 Illinois counties and 2247th 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 Cass 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 | April 10, 2023 14:45 | April 10, 2023 17:15 | 2h 30m | 4,486 | 2,492 |
| 2 | February 27, 2023 12:15 | February 28, 2023 06:15 | 18h | 909 | 2,956 |
| 3 | June 29, 2023 17:15 | July 2, 2023 14:45 | 2d 21h | 751 | 3,976 |
| 4 | March 31, 2023 22:45 | April 1, 2023 09:15 | 10h 30m | 748 | 1,411 |
| 5 | July 27, 2023 17:45 | July 27, 2023 23:30 | 5h 45m | 108 | 324 |
| 6 | June 13, 2023 00:00 | June 13, 2023 01:00 | 1h | 105 | 89 |
| 7 | June 7, 2023 01:15 | June 7, 2023 02:00 | 45m | 68 | 51 |
| 8 | March 8, 2023 19:30 | March 8, 2023 21:15 | 1h 45m | 59 | 90 |
| 9 | May 8, 2023 09:45 | May 8, 2023 11:30 | 1h 45m | 58 | 17 |
| 10 | September 28, 2023 14:45 | September 28, 2023 20:15 | 5h 30m | 58 | 63 |
Outage episodes by size in 2023: 6 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 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 |
|---|---|---|---|---|---|
| Ameren Illinois Company | 2023 | 9.9 hrs | 1.33 | 1.9 hrs | 0.82 |
| Menard Electric Coop | 2023 | 7.4 hrs | 2.47 | 1.6 hrs | 1.46 |
| 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 2023; 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, 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/cass-county