County annual report · FIPS 17081
2020 Jefferson County, IL Power Outage Report
In 2020, customers in Jefferson County, IL went without power for an average of 2.3 hours, a total of 52K customer-hours (Illinois average 5.9 hours). That ranks 71st worst of 102 Illinois counties and 2129th 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 Jefferson 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 | August 11, 2020 00:45 | August 13, 2020 03:00 | 2d 2h | 3,056 | 21K |
| 2 | May 2, 2020 13:45 | May 2, 2020 16:30 | 2h 45m | 1,450 | 1,667 |
| 3 | July 7, 2020 11:30 | July 7, 2020 15:15 | 3h 45m | 1,005 | 2,803 |
| 4 | September 12, 2020 14:15 | September 12, 2020 19:00 | 4h 45m | 796 | 997 |
| 5 | April 7, 2020 13:15 | April 7, 2020 15:45 | 2h 30m | 606 | 1,061 |
| 6 | April 13, 2020 07:00 | April 14, 2020 01:00 | 18h | 571 | 1,626 |
| 7 | January 23, 2020 22:30 | January 24, 2020 03:30 | 5h | 500 | 1,152 |
| 8 | May 5, 2020 06:30 | May 5, 2020 10:30 | 4h | 495 | 1,001 |
| 9 | May 27, 2020 03:00 | May 27, 2020 10:15 | 7h 15m | 459 | 2,266 |
| 10 | November 12, 2020 20:00 | November 12, 2020 22:00 | 2h | 407 | 508 |
Outage episodes by size in 2020: 35 reached 100+ customers, 3 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 Jefferson 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 |
| Tri-County Electric Coop, Inc (IL) | 2020 | 2.7 hrs | 1.14 | 83 min | 0.85 |
| Ameren | - | - | - | - | - |
| Wayne-White Counties 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 ÷ 22,670 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. Jefferson County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Jefferson 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/jefferson-county