County annual report · FIPS 17121
2023 Marion County, IL Power Outage Report
In 2023, customers in Marion County, IL went without power for an average of 11.7 hours, a total of 178K customer-hours (Illinois average 4.0 hours). That ranks 30th worst of 102 Illinois counties and 733rd 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 Marion 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 | July 29, 2023 22:45 | August 1, 2023 06:45 | 2d 8h | 7,668 | 114K |
| 2 | September 27, 2023 12:30 | September 27, 2023 18:30 | 6h | 3,740 | 3,223 |
| 3 | March 31, 2023 22:45 | April 1, 2023 23:45 | 1d 1h | 3,086 | 12K |
| 4 | April 29, 2023 14:45 | April 29, 2023 19:15 | 4h 30m | 2,485 | 6,541 |
| 5 | June 29, 2023 19:00 | June 30, 2023 14:00 | 19h | 1,122 | 1,757 |
| 6 | May 15, 2023 00:15 | May 15, 2023 11:15 | 11h | 970 | 1,060 |
| 7 | March 3, 2023 20:15 | March 5, 2023 07:15 | 1d 11h | 840 | 3,753 |
| 8 | June 30, 2023 22:30 | July 4, 2023 23:00 | 4d | 824 | 13K |
| 9 | August 13, 2023 23:00 | August 14, 2023 04:00 | 5h | 732 | 905 |
| 10 | February 9, 2023 08:45 | February 9, 2023 21:30 | 12h 45m | 648 | 1,629 |
Outage episodes by size in 2023: 35 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 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 |
| Southwestern Electric Coop Inc - (IL) | 2023 | 6.2 hrs | 2.74 | 4.3 hrs | 2.22 |
| Tri-County Electric Coop, Inc (IL) | 2023 | 4.3 hrs | 1.91 | 52 min | 0.52 |
| 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 2023; 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, 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/marion-county