County annual report · FIPS 17121
2015 Marion County, IL Power Outage Report
In 2015, customers in Marion County, IL went without power for an average of 1.1 hours, a total of 17K customer-hours (Illinois average 2.3 hours). That ranks 70th worst of 100 Illinois counties and 1688th of 2,484 nationally.
Compared with IL, the US
Coverage line is EAGLE-I's share of Illinois customers tracked each year.
Biggest outages in Marion County, 2015
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | September 24, 2015 03:45 | September 24, 2015 13:15 | 9h 30m | 1,441 | 3,696 |
| 2 | May 25, 2015 03:45 | May 26, 2015 00:45 | 21h | 1,106 | 2,367 |
| 3 | July 14, 2015 02:30 | July 14, 2015 16:00 | 13h 30m | 617 | 2,389 |
| 4 | July 22, 2015 07:00 | July 22, 2015 13:00 | 6h | 513 | 2,315 |
| 5 | December 22, 2015 09:45 | December 22, 2015 10:30 | 45m | 513 | 385 |
| 6 | May 19, 2015 14:15 | May 19, 2015 15:15 | 1h | 463 | 166 |
| 7 | June 14, 2015 21:45 | June 15, 2015 02:15 | 4h 30m | 453 | 400 |
| 8 | September 4, 2015 21:45 | September 5, 2015 01:00 | 3h 15m | 232 | 377 |
| 9 | September 25, 2015 10:30 | September 25, 2015 16:45 | 6h 15m | 154 | 162 |
| 10 | November 17, 2015 13:30 | November 17, 2015 16:00 | 2h 30m | 137 | 79 |
Outage episodes by size in 2015: 12 reached 100+ customers, 2 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 2015, 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 | 2015 | 5.9 hrs | 1.39 | 2.2 hrs | 1.04 |
| Southwestern Electric Coop Inc - (IL) | 2015 | 2.7 hrs | 1.63 | 2.4 hrs | 1.50 |
| Tri-County Electric Coop, Inc (IL) | 2015 | 2.7 hrs | 2.00 | 2.0 hrs | 1.50 |
| 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 2015; 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, 2015, 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/2015/illinois/marion-county