County annual report · FIPS 17181
2020 Union County, IL Power Outage Report
In 2020, customers in Union County, IL went without power for an average of 1.7 hours, a total of 17K customer-hours (Illinois average 5.9 hours). That ranks 83rd worst of 102 Illinois counties and 2393rd of 3,019 nationally.
Compared with IL, the US and 2019
Coverage line is EAGLE-I's share of Illinois customers tracked each year.
Biggest outages in Union County, 2020
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | October 10, 2020 19:30 | October 11, 2020 02:30 | 7h | 4,813 | 8,611 |
| 2 | October 29, 2020 11:30 | October 29, 2020 14:15 | 2h 45m | 4,681 | 2,790 |
| 3 | June 30, 2020 09:45 | June 30, 2020 12:15 | 2h 30m | 1,532 | 1,149 |
| 4 | November 15, 2020 19:15 | November 15, 2020 20:30 | 1h 15m | 1,404 | 704 |
| 5 | December 24, 2020 10:15 | December 24, 2020 12:00 | 1h 45m | 353 | 617 |
| 6 | December 25, 2020 04:45 | December 25, 2020 06:15 | 1h 30m | 353 | 471 |
| 7 | August 28, 2020 14:30 | August 28, 2020 18:00 | 3h 30m | 286 | 239 |
| 8 | April 9, 2020 00:00 | April 9, 2020 01:45 | 1h 45m | 116 | 203 |
| 9 | July 26, 2020 05:15 | July 26, 2020 09:15 | 4h | 116 | 464 |
| 10 | November 14, 2020 05:45 | November 14, 2020 07:00 | 1h 15m | 114 | 114 |
Outage episodes by size in 2020: 10 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 Union County reported on EIA Form 861 for 2020, 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 | 2020 | 3.7 hrs | 1.04 | 1.7 hrs | 0.82 |
| Ameren | - | - | - | - | - |
| Egyptian Electric Coop Assn | - | - | - | - | - |
| Southern 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 94% of Illinois's customers in 2020; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 10,277 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. Union County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Union County, IL annual power outage report, 2020, 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/2020/illinois/union-county