County annual report · FIPS 17119
2025 Madison County, IL Power Outage Report
In 2025, customers in Madison County, IL went without power for an average of 7.5 hours, a total of 804K customer-hours (Illinois average 2.5 hours). That ranks 25th worst of 102 Illinois counties and 1086th 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 Madison 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 15, 2025 13:15 | May 21, 2025 04:15 | 5d 15h | 18,731 | 441K |
| 2 | August 12, 2025 12:15 | September 10, 2025 01:15 | 28d 13h | 7,943 | 77K |
| 3 | July 21, 2025 03:45 | July 22, 2025 03:15 | 23h 30m | 7,226 | 33K |
| 4 | July 6, 2025 20:00 | July 7, 2025 23:15 | 1d 3h | 6,396 | 11K |
| 5 | March 14, 2025 19:45 | March 17, 2025 08:45 | 2d 13h | 5,130 | 54K |
| 6 | April 21, 2025 08:15 | April 21, 2025 12:15 | 4h | 4,478 | 7,940 |
| 7 | June 16, 2025 03:15 | June 17, 2025 11:00 | 1d 7h | 4,227 | 13K |
| 8 | July 11, 2025 13:45 | July 13, 2025 00:00 | 1d 10h | 3,482 | 15K |
| 9 | March 18, 2025 13:15 | March 20, 2025 06:30 | 1d 17h | 2,733 | 6,371 |
| 10 | June 18, 2025 00:45 | June 19, 2025 15:30 | 1d 14h | 2,412 | 4,553 |
Outage episodes by size in 2025: 98 reached 100+ customers, 23 reached 1,000+ customers, 1 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 Madison 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 |
| Southwestern Electric Coop Inc - (IL) | 2024 | 5.1 hrs | 2.21 | 4.4 hrs | 1.78 |
| Ameren | - | - | - | - | - |
| M J M Electric Cooperative Inc | - | - | - | - | - |
| Clinton County Elec Coop, Inc | - | - | - | - | - |
| City of Highland | - | - | - | - | - |
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 ÷ 107,855 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. Madison County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Madison 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/madison-county