County annual report · FIPS 17081
2024 Jefferson County, IL Power Outage Report
In 2024, customers in Jefferson County, IL went without power for an average of 3.2 hours, a total of 71K customer-hours (Illinois average 3.0 hours). That ranks 53rd worst of 102 Illinois counties and 2054th of 2,990 nationally.
Compared with IL, the US and 2023
Coverage line is EAGLE-I's share of Illinois customers tracked each year.
Biggest outages in Jefferson County, 2024
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | May 9, 2024 00:30 | May 10, 2024 00:45 | 1d | 4,728 | 12K |
| 2 | March 15, 2024 00:45 | March 15, 2024 23:30 | 22h 45m | 3,863 | 24K |
| 3 | May 27, 2024 00:15 | May 27, 2024 13:30 | 13h 15m | 1,624 | 4,823 |
| 4 | January 3, 2024 15:00 | January 3, 2024 18:45 | 3h 45m | 1,461 | 1,461 |
| 5 | July 20, 2024 13:45 | July 20, 2024 19:15 | 5h 30m | 1,448 | 1,815 |
| 6 | July 16, 2024 10:45 | July 18, 2024 00:15 | 1d 13h | 1,004 | 2,394 |
| 7 | March 30, 2024 04:30 | March 30, 2024 14:00 | 9h 30m | 688 | 2,953 |
| 8 | October 6, 2024 13:15 | October 6, 2024 16:15 | 3h | 655 | 536 |
| 9 | October 18, 2024 14:00 | October 18, 2024 15:45 | 1h 45m | 576 | 294 |
| 10 | March 18, 2024 12:15 | March 18, 2024 17:00 | 4h 45m | 552 | 818 |
Outage episodes by size in 2024: 34 reached 100+ customers, 6 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 2024, 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 | 2024 | 3.7 hrs | 1.13 | 2.0 hrs | 0.91 |
| Tri-County Electric Coop, Inc (IL) | 2024 | 6.2 hrs | 2.50 | 64 min | 0.73 |
| 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 n/a of Illinois's customers in 2024; 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, 2024, 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/2024/illinois/jefferson-county