County annual report · FIPS 17013
2025 Calhoun County, IL Power Outage Report
In 2025, customers in Calhoun County, IL went without power for an average of 9.4 hours, a total of 18K customer-hours (Illinois average 2.5 hours). That ranks 17th worst of 102 Illinois counties and 848th of 3,000 nationally.
Compared with IL, the US and 2024
Coverage line is EAGLE-I's share of Illinois customers tracked each year.
Biggest outages in Calhoun County, 2025
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | May 16, 2025 19:45 | May 16, 2025 23:30 | 3h 45m | 1,114 | 2,121 |
| 2 | May 3, 2025 08:30 | May 3, 2025 15:15 | 6h 45m | 663 | 920 |
| 3 | November 16, 2025 14:45 | November 16, 2025 16:45 | 2h | 592 | 321 |
| 4 | August 7, 2025 18:15 | August 7, 2025 21:15 | 3h | 564 | 865 |
| 5 | April 28, 2025 19:45 | April 29, 2025 04:00 | 8h 15m | 368 | 898 |
| 6 | March 15, 2025 00:00 | March 15, 2025 18:15 | 18h 15m | 307 | 4,268 |
| 7 | December 29, 2025 03:00 | December 29, 2025 06:15 | 3h 15m | 250 | 779 |
| 8 | May 17, 2025 00:15 | May 17, 2025 04:45 | 4h 30m | 234 | 679 |
| 9 | July 27, 2025 04:30 | July 28, 2025 20:30 | 1d 16h | 224 | 3,013 |
| 10 | March 5, 2025 17:15 | March 5, 2025 23:00 | 5h 45m | 222 | 973 |
Outage episodes by size in 2025: 14 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 Calhoun County reported on EIA Form 861 for 2025, 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 |
| 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 2025; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 1,865 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. Calhoun County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Calhoun County, IL annual power outage report, 2025, 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/2025/illinois/calhoun-county