County annual report · FIPS 17081
2019 Jefferson County, IL Power Outage Report
In 2019, customers in Jefferson County, IL went without power for an average of 12.9 hours, a total of 292K customer-hours (Illinois average 1.8 hours). That ranks 3rd worst of 102 Illinois counties and 419th of 2,945 nationally.
Compared with IL, the US and 2018
Coverage line is EAGLE-I's share of Illinois customers tracked each year.
Biggest outages in Jefferson County, 2019
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | February 24, 2019 05:45 | February 25, 2019 22:45 | 1d 17h | 4,683 | 31K |
| 2 | July 17, 2019 17:00 | July 19, 2019 03:15 | 1d 10h | 3,744 | 34K |
| 3 | January 30, 2019 05:15 | January 31, 2019 14:45 | 1d 9h | 3,377 | 17K |
| 4 | April 14, 2019 07:00 | April 16, 2019 02:15 | 1d 19h | 3,333 | 18K |
| 5 | July 3, 2019 21:00 | July 4, 2019 10:00 | 13h | 2,333 | 2,537 |
| 6 | May 29, 2019 09:00 | May 30, 2019 12:00 | 1d 3h | 2,182 | 6,918 |
| 7 | August 21, 2019 23:00 | August 22, 2019 19:30 | 20h 30m | 2,148 | 4,363 |
| 8 | August 16, 2019 22:15 | August 17, 2019 06:15 | 8h | 2,125 | 3,025 |
| 9 | June 6, 2019 00:30 | June 6, 2019 22:30 | 22h | 1,706 | 6,241 |
| 10 | May 27, 2019 01:00 | May 28, 2019 01:15 | 1d | 1,603 | 2,170 |
Outage episodes by size in 2019: 120 reached 100+ customers, 28 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 2019, 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 | 2018 | 3.5 hrs | 1.06 | 1.8 hrs | 0.90 |
| Tri-County Electric Coop, Inc (IL) | 2018 | 4.7 hrs | 1.74 | 83 min | 0.81 |
| 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 99% of Illinois's customers in 2019; 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, 2019, 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/2019/illinois/jefferson-county