County annual report · FIPS 17029
2021 Coles County, IL Power Outage Report
In 2021, customers in Coles County, IL went without power for an average of 3.0 hours, a total of 73K customer-hours (Illinois average 2.3 hours). That ranks 46th worst of 102 Illinois counties and 1853rd 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 Coles 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 | December 11, 2021 04:15 | December 12, 2021 22:00 | 1d 17h | 4,329 | 34K |
| 2 | October 22, 2021 21:00 | October 23, 2021 01:15 | 4h 15m | 3,466 | 5,560 |
| 3 | July 15, 2021 15:00 | July 16, 2021 01:30 | 10h 30m | 2,417 | 4,393 |
| 4 | May 9, 2021 11:30 | May 9, 2021 15:00 | 3h 30m | 2,379 | 2,815 |
| 5 | July 16, 2021 07:15 | July 16, 2021 14:45 | 7h 30m | 816 | 1,891 |
| 6 | May 5, 2021 14:00 | May 5, 2021 19:30 | 5h 30m | 495 | 610 |
| 7 | June 30, 2021 12:00 | June 30, 2021 20:15 | 8h 15m | 494 | 223 |
| 8 | August 26, 2021 19:00 | August 26, 2021 23:15 | 4h 15m | 448 | 368 |
| 9 | March 15, 2021 10:45 | March 15, 2021 18:45 | 8h | 443 | 1,116 |
| 10 | March 7, 2021 14:30 | March 7, 2021 19:30 | 5h | 442 | 1,069 |
Outage episodes by size in 2021: 44 reached 100+ customers, 4 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 Coles 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 |
| Ameren | - | - | - | - | - |
| Coles-Moultrie Electric Coop | - | - | - | - | - |
| Enerstar Power Corp | - | - | - | - | - |
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 ÷ 24,455 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. Coles County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Coles 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/coles-county