County annual report · FIPS 17081
2017 Jefferson County, IL Power Outage Report
In 2017, customers in Jefferson County, IL went without power for an average of 1.5 hours, a total of 35K customer-hours (Illinois average 1.4 hours). That ranks 33rd worst of 102 Illinois counties and 1810th of 2,786 nationally.
Compared with IL, the US and 2016
Coverage line is EAGLE-I's share of Illinois customers tracked each year.
Biggest outages in Jefferson County, 2017
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 22, 2017 14:30 | October 23, 2017 09:15 | 18h 45m | 3,003 | 5,611 |
| 2 | October 29, 2017 12:00 | October 29, 2017 17:15 | 5h 15m | 2,562 | 3,854 |
| 3 | November 28, 2017 22:30 | November 29, 2017 22:15 | 23h 45m | 1,279 | 3,192 |
| 4 | December 17, 2017 15:15 | December 18, 2017 17:15 | 1d 2h | 746 | 603 |
| 5 | March 1, 2017 09:30 | March 3, 2017 13:45 | 2d 4h | 591 | 1,710 |
| 6 | April 26, 2017 19:15 | April 27, 2017 18:15 | 23h | 520 | 3,969 |
| 7 | January 3, 2017 09:30 | January 3, 2017 11:00 | 1h 30m | 509 | 764 |
| 8 | March 27, 2017 00:45 | March 27, 2017 10:00 | 9h 15m | 507 | 3,621 |
| 9 | December 5, 2017 08:15 | December 5, 2017 11:15 | 3h | 485 | 286 |
| 10 | December 14, 2017 15:15 | December 14, 2017 23:45 | 8h 30m | 335 | 341 |
Outage episodes by size in 2017: 24 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 2017, 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 | 2017 | 3.2 hrs | 1.12 | 2.0 hrs | 0.90 |
| Tri-County Electric Coop, Inc (IL) | 2017 | 4.1 hrs | 1.90 | 73 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 n/a of Illinois's customers in 2017; 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, 2017, 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/2017/illinois/jefferson-county