County annual report · FIPS 17109
2021 McDonough County, IL Power Outage Report
In 2021, customers in McDonough County, IL went without power for an average of 1.2 hours, a total of 16K customer-hours (Illinois average 2.3 hours). That ranks 91st worst of 102 Illinois counties and 2570th 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 McDonough 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 | April 20, 2021 14:30 | April 20, 2021 17:15 | 2h 45m | 4,126 | 1,991 |
| 2 | January 25, 2021 22:45 | January 25, 2021 23:00 | 15m | 771 | 193 |
| 3 | October 24, 2021 21:15 | October 24, 2021 22:45 | 1h 30m | 393 | 590 |
| 4 | September 21, 2021 03:15 | September 21, 2021 06:00 | 2h 45m | 391 | 782 |
| 5 | September 18, 2021 05:15 | September 18, 2021 19:45 | 14h 30m | 389 | 2,266 |
| 6 | March 24, 2021 01:15 | March 24, 2021 03:45 | 2h 30m | 294 | 522 |
| 7 | May 24, 2021 16:45 | May 24, 2021 21:15 | 4h 30m | 251 | 175 |
| 8 | November 10, 2021 01:45 | November 10, 2021 02:15 | 30m | 251 | 126 |
| 9 | September 19, 2021 13:00 | September 19, 2021 16:30 | 3h 30m | 234 | 761 |
| 10 | June 19, 2021 05:00 | June 20, 2021 22:15 | 1d 17h | 233 | 5,265 |
Outage episodes by size in 2021: 15 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 McDonough 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 |
| Adams Electric Coop | 2018 | 2.2 hrs | 1.12 | 2.2 hrs | 1.12 |
| Ameren | - | - | - | - | - |
| McDonough Power Coop | - | - | - | - | - |
| Spoon River Electric Coop, Inc | - | - | - | - | - |
| Western Illinois Elec Coop | - | - | - | - | - |
| City of Bushnell - (IL) | - | - | - | - | - |
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 ÷ 12,745 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. McDonough County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), McDonough 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/mcdonough-county