County annual report · FIPS 17121
2018 Marion County, IL Power Outage Report
In 2018, customers in Marion County, IL went without power for an average of 3.1 hours, a total of 48K customer-hours (Illinois average 2.5 hours). That ranks 39th worst of 102 Illinois counties and 1471st of 2,798 nationally.
Compared with IL, the US and 2017
Coverage line is EAGLE-I's share of Illinois customers tracked each year.
Biggest outages in Marion County, 2018
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | June 28, 2018 23:30 | July 2, 2018 09:45 | 3d 10h | 2,381 | 30K |
| 2 | December 6, 2018 19:30 | December 7, 2018 15:45 | 20h 15m | 918 | 2,702 |
| 3 | May 31, 2018 16:00 | June 1, 2018 09:15 | 17h 15m | 544 | 6,494 |
| 4 | August 1, 2018 15:00 | August 1, 2018 16:00 | 1h | 537 | 175 |
| 5 | August 17, 2018 08:30 | August 17, 2018 12:00 | 3h 30m | 536 | 1,046 |
| 6 | February 28, 2018 15:15 | February 28, 2018 17:15 | 2h | 393 | 610 |
| 7 | April 16, 2018 07:00 | April 16, 2018 09:30 | 2h 30m | 276 | 621 |
| 8 | July 2, 2018 23:00 | July 3, 2018 05:00 | 6h | 245 | 356 |
| 9 | February 2, 2018 15:30 | February 2, 2018 16:00 | 30m | 205 | 103 |
| 10 | November 26, 2018 05:15 | November 26, 2018 16:30 | 11h 15m | 99 | 408 |
Outage episodes by size in 2018: 9 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 Marion County reported on EIA Form 861 for 2018, 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 | 2018 | 3.5 hrs | 1.06 | 1.8 hrs | 0.90 |
| Southwestern Electric Coop Inc - (IL) | 2018 | 4.6 hrs | 1.89 | 4.6 hrs | 1.89 |
| Tri-County Electric Coop, Inc (IL) | 2018 | 4.7 hrs | 1.74 | 83 min | 0.81 |
| 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 92% of Illinois's customers in 2018; 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, 2018, 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/2018/illinois/marion-county