County annual report · FIPS 17081
2023 Jefferson County, IL Power Outage Report
In 2023, customers in Jefferson County, IL went without power for an average of 5.0 hours, a total of 113K customer-hours (Illinois average 4.0 hours). That ranks 49th worst of 102 Illinois counties and 1484th of 2,977 nationally.
Compared with IL, the US and 2022
Coverage line is EAGLE-I's share of Illinois customers tracked each year.
Biggest outages in Jefferson County, 2023
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | July 29, 2023 12:30 | July 31, 2023 23:30 | 2d 11h | 3,004 | 16K |
| 2 | June 25, 2023 17:15 | June 26, 2023 06:00 | 12h 45m | 2,472 | 8,656 |
| 3 | July 1, 2023 01:15 | July 5, 2023 00:30 | 3d 23h | 1,719 | 49K |
| 4 | February 9, 2023 09:45 | February 10, 2023 01:45 | 16h | 1,707 | 4,494 |
| 5 | February 14, 2023 20:30 | February 15, 2023 06:30 | 10h | 1,219 | 2,978 |
| 6 | March 13, 2023 01:15 | March 13, 2023 04:00 | 2h 45m | 990 | 1,747 |
| 7 | May 6, 2023 08:00 | May 6, 2023 11:00 | 3h | 806 | 2,019 |
| 8 | December 18, 2023 05:15 | December 18, 2023 09:15 | 4h | 805 | 2,820 |
| 9 | September 13, 2023 14:00 | September 13, 2023 18:15 | 4h 15m | 568 | 288 |
| 10 | April 16, 2023 01:15 | April 16, 2023 12:00 | 10h 45m | 562 | 1,534 |
Outage episodes by size in 2023: 38 reached 100+ customers, 5 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 2023, 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 | 2023 | 9.9 hrs | 1.33 | 1.9 hrs | 0.82 |
| Tri-County Electric Coop, Inc (IL) | 2023 | 4.3 hrs | 1.91 | 52 min | 0.52 |
| 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 2023; 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, 2023, 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/2023/illinois/jefferson-county