County annual report · FIPS 17087
2024 Johnson County, IL Power Outage Report
In 2024, customers in Johnson County, IL went without power for an average of 10.7 hours, a total of 70K customer-hours (Illinois average 3.0 hours). That ranks 10th worst of 102 Illinois counties and 876th 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 Johnson 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 26, 2024 14:45 | May 29, 2024 12:30 | 2d 21h | 1,873 | 31K |
| 2 | April 2, 2024 10:15 | April 3, 2024 10:30 | 1d | 1,248 | 8,621 |
| 3 | April 24, 2024 15:15 | April 24, 2024 18:00 | 2h 45m | 1,230 | 617 |
| 4 | April 7, 2024 16:30 | April 8, 2024 12:45 | 20h 15m | 974 | 11K |
| 5 | March 7, 2024 15:00 | March 7, 2024 18:00 | 3h | 642 | 169 |
| 6 | June 16, 2024 23:30 | June 17, 2024 13:00 | 13h 30m | 553 | 4,417 |
| 7 | June 28, 2024 16:00 | June 28, 2024 16:30 | 30m | 553 | 179 |
| 8 | April 9, 2024 15:15 | April 9, 2024 15:45 | 30m | 533 | 134 |
| 9 | July 27, 2024 03:00 | July 27, 2024 04:00 | 1h | 528 | 528 |
| 10 | April 19, 2024 14:45 | April 19, 2024 15:00 | 15m | 480 | 120 |
Outage episodes by size in 2024: 18 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 Johnson 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 |
| Egyptian Electric Coop Assn | 2024 | 2.1 hrs | - | - | - |
| Southeastern IL Elec Coop, Inc | 2024 | 10.0 hrs | 3.07 | 2.3 hrs | 1.50 |
| Ameren | - | - | - | - | - |
| Southern Illinois 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 ÷ 6,500 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. Johnson County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Johnson 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/johnson-county