County annual report · FIPS 17121
2025 Marion County, IL Power Outage Report
In 2025, customers in Marion County, IL went without power for an average of 4.6 hours, a total of 70K customer-hours (Illinois average 2.5 hours). That ranks 40th worst of 102 Illinois counties and 1615th 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 Marion 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 30, 2025 06:00 | May 30, 2025 09:15 | 3h 15m | 2,248 | 3,572 |
| 2 | January 1, 2025 10:45 | January 1, 2025 13:45 | 3h | 2,191 | 5,145 |
| 3 | April 29, 2025 13:15 | April 30, 2025 12:30 | 23h 15m | 1,791 | 7,260 |
| 4 | April 19, 2025 07:30 | April 20, 2025 04:45 | 21h 15m | 1,643 | 11K |
| 5 | April 2, 2025 14:15 | April 3, 2025 22:45 | 1d 8h | 1,042 | 5,143 |
| 6 | December 10, 2025 06:00 | December 10, 2025 07:45 | 1h 45m | 851 | 978 |
| 7 | March 14, 2025 20:45 | March 16, 2025 16:45 | 1d 20h | 747 | 5,361 |
| 8 | January 18, 2025 03:45 | January 18, 2025 11:30 | 7h 45m | 746 | 237 |
| 9 | October 24, 2025 06:15 | October 24, 2025 10:00 | 3h 45m | 745 | 378 |
| 10 | December 10, 2025 13:15 | December 11, 2025 00:15 | 11h | 745 | 2,271 |
Outage episodes by size in 2025: 32 reached 100+ customers, 5 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 Marion 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 |
| Tri-County Electric Coop, Inc (IL) | 2024 | 6.2 hrs | 2.50 | 64 min | 0.73 |
| Ameren | - | - | - | - | - |
| Wayne-White Counties Elec Coop | - | - | - | - | - |
| Clay Electric Coop Inc | - | - | - | - | - |
| Clinton County Elec 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 n/a of Illinois's customers in 2025; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 15,234 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. Marion County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Marion 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/marion-county