County annual report · FIPS 17123
2021 Marshall County, IL Power Outage Report
In 2021, customers in Marshall County, IL went without power for an average of 4.9 hours, a total of 39K customer-hours (Illinois average 2.3 hours). That ranks 24th worst of 102 Illinois counties and 1342nd of 2,974 nationally.
Compared with IL, the US and 2020
Coverage line is EAGLE-I's share of Illinois customers tracked each year.
Biggest outages in Marshall County, 2021
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | January 1, 2021 22:00 | January 4, 2021 01:45 | 2d 3h | 1,728 | 8,247 |
| 2 | October 24, 2021 22:15 | October 25, 2021 08:00 | 9h 45m | 757 | 2,445 |
| 3 | July 18, 2021 23:45 | July 19, 2021 08:45 | 9h | 616 | 3,245 |
| 4 | June 28, 2021 21:30 | June 29, 2021 06:15 | 8h 45m | 561 | 2,009 |
| 5 | August 31, 2021 17:15 | August 31, 2021 19:45 | 2h 30m | 403 | 518 |
| 6 | July 30, 2021 04:30 | July 30, 2021 19:15 | 14h 45m | 284 | 1,767 |
| 7 | November 19, 2021 16:30 | November 19, 2021 19:45 | 3h 15m | 275 | 356 |
| 8 | July 6, 2021 20:45 | July 7, 2021 00:45 | 4h | 269 | 1,017 |
| 9 | December 15, 2021 16:15 | December 17, 2021 20:00 | 2d 3h | 219 | 1,956 |
| 10 | March 15, 2021 16:30 | March 17, 2021 02:15 | 1d 9h | 216 | 4,173 |
Outage episodes by size in 2021: 21 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 Marshall County reported on EIA Form 861 for 2021, 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 | 2021 | 3.2 hrs | 1.11 | 2.0 hrs | 0.88 |
| Commonwealth Edison Co | 2021 | 1.7 hrs | 0.77 | 43 min | 0.59 |
| Corn Belt Energy Corporation | 2021 | 12.3 hrs | 6.64 | 3.7 hrs | 4.71 |
| Ameren | - | - | - | - | - |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about 98% of Illinois's customers in 2021; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 7,906 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. Marshall County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Marshall County, IL annual power outage report, 2021, 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/2021/illinois/marshall-county