County annual report · FIPS 17071
2021 Henderson County, IL Power Outage Report
In 2021, customers in Henderson County, IL went without power for an average of 12.8 hours, a total of 43K customer-hours (Illinois average 2.3 hours). That ranks 3rd worst of 102 Illinois counties and 646th 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 Henderson 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 10, 2021 17:15 | December 12, 2021 20:30 | 2d 3h | 2,600 | 8,151 |
| 2 | December 16, 2021 02:00 | December 17, 2021 01:30 | 23h 30m | 1,439 | 7,091 |
| 3 | June 19, 2021 04:30 | June 20, 2021 14:45 | 1d 10h | 1,420 | 9,137 |
| 4 | February 27, 2021 12:00 | February 27, 2021 21:15 | 9h 15m | 1,419 | 6,588 |
| 5 | June 4, 2021 19:45 | June 5, 2021 01:15 | 5h 30m | 1,415 | 6,043 |
| 6 | January 1, 2021 16:45 | January 1, 2021 19:00 | 2h 15m | 1,240 | 1,236 |
| 7 | August 11, 2021 00:15 | August 11, 2021 03:30 | 3h 15m | 1,198 | 1,809 |
| 8 | November 8, 2021 14:15 | November 8, 2021 15:00 | 45m | 87 | 58 |
| 9 | September 21, 2021 02:15 | September 21, 2021 10:15 | 8h | 63 | 289 |
| 10 | March 14, 2021 22:30 | March 15, 2021 10:45 | 12h 15m | 62 | 340 |
Outage episodes by size in 2021: 7 reached 100+ customers, 7 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 Henderson 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 | - | - | - | - | - |
| McDonough Power Coop | - | - | - | - | - |
| Western Illinois Elec Coop | - | - | - | - | - |
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 ÷ 3,381 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. Henderson County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Henderson 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/henderson-county